Manufacturing Method Of Power Battery Cover Plate

The aluminum cover of the lithium battery is welded to the top of the battery case, and the electrode sheets on the aluminum cover need to be separated from the aluminum cover itself by an insulating sheet to form an electrode for use. When manufacturing aluminum cover plates now, the aluminum sheet is usually punched and blanked directly into a small semi-finished product. The insulating sheet is manufactured separately, and then an insulating sheet is manually installed on the front and back of the small semi-finished product. Then add rivets and electrode sheets, and then rivet the semi-finished products piece by piece into the finished product. This piece-by-piece assembly and production method is inefficient and makes the cost very high.

Due to the small size of the aluminum cover, it is inconvenient to assemble the insulation sheets manually, and the positioning accuracy is low, which affects the yield. Moreover, the insulating sheet on the aluminum cover is in a split form with one piece on the front and one on the back, which reduces the reliability of the insulation sealing performance and may affect the working reliability of the lithium battery.

(a) Prepare flat aluminum sheets that meet the required dimensions and punch out several rows of regularly arranged through holes on the aluminum sheets. The number of through holes is determined according to the size and specification of the aluminum sheets and the specifications and quantity requirements of the final finished aluminum cover plate;

(b) Punch out a slightly sunken step surface at each through hole on the front of the aluminum sheet, then stamp and correct each through hole again, and then clean the aluminum sheet;

(c) Put the aluminum sheet into the injection molding machine, and inject the insulating sheet at each through hole at one time. After taking out the aluminum sheet, remove the injection flow channel and the remaining material at the corners;

(d) Place a rivet in each through hole of the aluminum sheet, that is, put a rivet on the top of each insulating sheet, place an electrode sheet on the bottom, and then rivet each rivet and electrode sheet;

(e) The aluminum sheet is punched and blanked, and each through hole corresponds to a final aluminum cover plate;

(f) Clean and brighten the surface of the punched aluminum cover plate to obtain a qualified final product.

The utility model relates to the field of batteries, and specifically relates to an aluminum shell cover for a power lithium ion battery. It includes a cover body. Two insulating sleeves are provided on the cover body. Poles are fixed in the insulating sleeves. An upper cover ring is fixed on the insulating sleeve above the cover body. An upper cover ring is fixed on the insulating sleeve below the cover body. The lower cover ring, the lower end of the insulating sleeve is equipped with a top sleeve, the upper end of the top sleeve is close to the lower cover ring, and there are openings on the bottom plate of the top sleeve There is an opening, and the bolt passes through the opening and is threaded with the lower end of the pole. The nut of the bolt is tightly against the bottom plate of the top sleeve. There is a rectangular slot on the side wall of the top sleeve. The lead piece penetrates the rectangular slot. There is a through hole on the lead piece in the top sleeve. hole, the bolt passes through the through hole, a top ring is fixed on the bolt in the top sleeve, and the top ring and the lower end of the pole are tightly against the lead piece.

The utility model has simple structure and convenient connection, can extend the service life of the lithium-ion battery, is easy to assemble, has low cost, has good sealing performance and can improve production efficiency.