Laser die cutting device for battery core pole lugs

Abstract

The invention relates to laser die cutting device for battery core pole lugs. The laser die cutting device is characterized by comprising laser die cutting mechanisms arranged on one side or two sides of a pole piece. Each laser die cutting mechanism comprises a laser head. A dedusting mechanism is arranged, in the directions facing the pole piece, on the laser heads and comprises a dedusting shell, a gap allowing penetration of the pole piece is formed in dedusting shell, and laser paths are formed in side plates, facing the laser head, of the dedusting shell. A left air blade and a right air blade are mounted on the dedusting shell, oppositely arranged on two sides of the pole piece and used for blowing symmetrically on two sides of the pole piece to keep constant position and constant distance between the pole piece and the dedusting shell. The dedusting shell is connected with an induced draft device. The laser die cutting device for the battery core pole lugs has the advantages that by symmetrical blowing from two sides of the pole piece during cutting, a good dedusting effect is achieved, the dedusting mechanism is prevented from interfering with the pole piece, and cutting precision of the pole lugs is guaranteed.

Description

technical field [0001] The invention relates to a laser die-cutting device for battery tabs, belonging to the technical field of lithium battery manufacturing equipment. Background technique [0002] Lithium-ion battery is a battery made by winding or laminating the positive and negative electrodes into the required battery cells and injecting electrolyte and other processes. The positive and negative electrodes are composed of a current collector with a layer of coating on the upper and lower surfaces and a layer of metal in the middle. In the pole piece manufacturing process, it is necessary to use laser cutting pole pieces, such as figure 1 As shown, the sheet material of the pole piece includes the coating area D and the blank area E. The sheet material moves horizontally continuously, and the laser head cuts the sheet material according to the dotted line shown in the F position to form the tab G. [0003] The laser will generate dust during the cutting process. If th...

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Problems solved by technology

In CN102642087B, a laser cutting dust removal device is disclosed. The cutting backing plate is provided with several grooves, and the bottom of the grooves is connected with the air inlet passage and the suction passage, and the dust is sucked away by a dust suction fan; however, the laser cutting is extremely When cutting, the pole piece will have a downward deformation trend under the action of the laser and the vacuum fan. On the one hand, the laser is not easy to cut off the pole piece. On the other hand, the pole piece will touch the groove during the advancement process, resulting in extreme Deformed ears

In CN104972227A, a laser continuous cutting device with dust removal function is disclosed. A laser cutting channel and an adsorption hole are arranged on one side of the transmission roller. It will attract the pole piece, making it difficult for the pole piece to move forward

[0004] In addition, most existing laser die-cutting devices can only cut tabs on one side of the pole piece, but more and more customers require that they can cut on both sides of the pole piece at the same time, and ensure the tabs on both sides The center line is on the same straight line, and the existing equipment cannot meet this requirement

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