Lithium-ion battery: It is a secondary battery (i.e. rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes. During the charging and discharging process, Li is added and deintercalated back and forth between the two electrodes. : During charging, Li is deintercalated from the positive electrode and embedded in the negative electrode through the electrolyte. The negative electrode is in a lithium-rich state; the opposite is true during discharge. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries.
The production and processing process of lithium-ion batteries is complicated. From the aspect of dust removal, it includes mixing, rolling, sheeting, winding, welding, packaging and other processes. Lithium-ion batteries will produce dust or smoke during these processes. If not processed in time, Handling will have a greater impact on product quality, damage processing equipment, and even threaten the life and safety of employees.

Stirring is the first step in preparing lithium battery materials and is also an extremely critical step. Its main processes include batching, stirring, pulping, and winding, and the batching and mixing (feeding and unloading processes) have fine powder particles. If it is not handled in time, it will cause pollution to the production environment and affect the health of production personnel. For this kind of flying dust, a dust hood needs to be equipped at the dust generation point, and industrial dust collectors with large air volumes can be used.dust collector, which can ensure that dust is effectively collected.

The coated pole pieces need to be further compacted to increase the energy density of the battery. Before the pole pieces are rolled, a lot of fine powder adheres to the surface of the pole piece material, and the surface of the pole pieces needs to be cleaned; some manufacturers Cut off the scraps from both sides of the epipole piece. During the cutting process Dust and scraps will also be produced; during the compaction process of the roller press, a lot of fine powder adheres to the surface of the upper and lower rollers, and the surface of the rollers must be cleaned. The roller press is equipped with a scraper to clean the rollers and a suction machine. cover to suck away the dust scraped off by the scraper; generally the roller has 4 A scraper (2 upper and lower rollers each) is required to be equipped with a suction hood on the side of the discharge port, so the number of suction hoods is 2, and the dust removal diameter of each suction hood is φ75; currently, domestic roller presses are rarely equipped with dust collectors Suction hoods are basically only equipped with imported equipment. For such working conditions, optionalIndustrial dust collectorConduct centralized collection and treatment of dust.

Die-cutting process: mechanical stamping and die-cutting, for formed pole piece materials (such as square batteries,3V lithium battery), there are often unusable scraps in the corners, which need to be processed by a die-cutting machine to shape the edge contour of the pole piece. During the punching process, the sheared scraps need to be sucked away immediately to prevent molding. The influence of the cutting process; laser die cutting, also called laser tab forming, is generally located before the square battery is divided into strips. The principle is to use laser to cut the corners of the pole piece. During the cutting process, laser smoke and waste will be produced. The smoke must be dealt with immediately, otherwise it will affect the product quality. The waste produced by this process is mostly in the shape of strips, with For a small amount of fine powder, for this working condition, a medium-pressure dust collector with a combination of large cloth bag and plate and frame filter module can be selected.

Slitting: Pole piece slitting is generally used for cylindrical batteries or square battery pole pieces after laser die-cutting. The entire roll of pole piece material is cut off the waste edge by rolling (cylindrical) or laser die-cutting machine (square battery). , need to be cut into fixed-width sizes. During the slitting process using a slitting machine, a lot of excess powder and waste will be produced. These powders will be left on the slitting machine, affecting the service life of the equipment. Slitting Machine The locations that require dust removal mainly include the cutter suction hood, the pole piece roller brush suction hood, and the adsorption of scrap materials. A medium-pressure industrial dust collector is optional.