CN217550468U

CN217550468U - Lithium ion battery cell closed circuit winnowing equipment

Info

Publication number: CN217550468U
Application number: CN202221564578.6U
Authority: CN
Inventors: 唐睿; 孟祥雷; 李鑫浩; 苏岳锋; 陈来; 黄擎; 王敬; 吴锋
Original assignee: Chongqing Innovation Center of Beijing University of Technology
Current assignee: Chongqing Innovation Center of Beijing University of Technology
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-11
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a lithium ion battery retrieves technical field, concretely relates to lithium ion battery electricity core closed circuit selection by winnowing equipment, the on-line screen storage device comprises a base, install the wind channel on the base, the wind channel is "U" column structure, the wind channel comprises left wind channel, top wind channel and right wind channel, install axial fan between the left wind channel of wind channel and the right wind channel, axial fan makes wind circulate and flows in the wind channel, the upper end of top wind channel is installed the feed inlet, the lower extreme of top wind channel is installed the discharge gate, the bottom of right wind channel is installed and is collected the drawer; the beneficial effects are as follows: the utility model provides a closed selection by winnowing of lithium ion battery electricity core is equipped for positive negative pole material and diaphragm are realized the function of edulcoration simultaneously to the separation, are applied to lithium ion battery and retrieve the preliminary treatment stage.

Description

Lithium ion battery cell closed circuit winnowing equipment

Technical Field

The utility model relates to a lithium ion battery retrieves technical field, concretely relates to lithium ion battery electricity core closed circuit selection by winnowing is equipped.

Background

A lithium ion battery is a type of secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. The lithium ion battery consists of a positive electrode, a negative electrode, a diaphragm, electrolyte and a shell. In industry, manufacturers mainly use lithium cobaltate, lithium manganate, ternary lithium nickel cobalt manganese oxide, lithium iron phosphate and the like as the positive electrode materials of lithium ion batteries, and natural graphite and artificial graphite as negative electrode active substances. Polyvinylidene fluoride (PVDF) is a widely used positive electrode binder, has high viscosity and good chemical stability and physical properties. Lithium ion batteries produced industrially mainly use a solution prepared from an electrolyte lithium hexafluorophosphate (LiPF 6) and an organic solvent as an electrolyte, and use an organic film, such as a porous polymer of Polyethylene (PE) and polypropylene (PP), as a separator of the battery. The lithium ion battery is generally considered as an environment-friendly pollution-free green battery, but improper recycling of the lithium ion battery also causes pollution. Although the lithium ion battery does not contain toxic heavy metals such as mercury, cadmium, lead and the like, the positive and negative electrode materials, the electrolyte and the like of the battery still have great influence on the environment and the human body.

If the common treatment method is adopted to treat the lithium ion battery (landfill, incineration, compost and the like), metals such as cobalt, nickel, lithium, manganese and the like in the battery and various organic and inorganic compounds cause metal pollution, organic matter pollution, dust pollution and acid-base pollution. Lithium-ion electrolyte mechanical transformation products, such as LiPF6, lithium hexafluoroarsenate (LiAsF 6), lithium trifluoromethanesulfonate (LiCF 3SO 3), hydrofluoric acid (HF), etc., and solvents and hydrolysis products, such as ethylene glycol dimethyl ether (DME), methanol, formic acid, etc., are toxic substances. Therefore, the waste lithium ion battery needs to be recycled, so that the harm to the natural environment and the human health is reduced.

The pretreatment of waste lithium batteries commonly used in the current market mostly adopts a direct crushing mode, the discharge end of a crusher is connected with an analyzer, the discharge end of pole piece particles of the analyzer is connected with a swing sieve, and a powder outlet of the analyzer is connected with two dust removal devices; the middle outlet of the swing sieve is connected with a grinder, the discharge port of the grinder is connected with a grinding collector, the powder outlet at the top end of the grinding collector is connected with three dust removing devices, and the bottom end opening of the grinding collector is connected with a rotary vibration sieve. The swing sieve comprises three discharge ports, wherein a top discharge port is used for sieving large-particle copper-aluminum particles, a bottom discharge port is used for sieving black powder, and a middle discharge port is used for sieving materials which can not be separated through specific gravity, such as a diaphragm. The black powder obtained in the form of coarse crushing and screening contains a large amount of metal fragments with extremely small particle sizes, and the subsequent black powder utilization process contains a large amount of impurities, so that the utilization value of the black powder is greatly reduced. Meanwhile, the diaphragm is cut into extremely fine fragments, and although a large amount of black powder is polluted, the black powder is small, so that effective recovery is difficult to realize basically.

Aiming at the defects in the prior art, how to effectively process the anode material, ensure the effective separation of the diaphragm, and simultaneously remove a large amount of metal scraps to obtain relatively pure anode and cathode materials is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium ion battery electricity core closed circuit selection by winnowing is equipped, and it is used for separating positive negative pole material and diaphragm, realizes the function of edulcoration simultaneously, is applied to lithium ion battery and retrieves the preliminary treatment stage.

In order to realize the purpose, the utility model provides a technical scheme does:

the utility model provides a lithium ion battery electricity core closed circuit selection by winnowing is equipped, includes base 1, its characterized in that: the air duct 2 is installed on the base 1, the air duct 2 is of a structure like a reverse U, the air duct 2 is composed of a left air duct 201, a top air duct 202 and a right air duct 203, an axial flow fan 3 is installed between the left air duct 201 and the right air duct 203 of the air duct 2, the axial flow fan 3 enables air to flow in the air duct 2 in a circulating mode, a feeding hole 4 is installed at the upper end of the top air duct 202, a discharging hole 5 is installed at the lower end of the top air duct 202, and a collection drawer 6 is installed at the bottom of the right air duct 203.

A baffle plate 7 is arranged in the top air channel 202 below the feed port 4, the lower part of the baffle plate 7 is aligned with the discharge port 5, and the baffle plate 7 is used for guiding materials entering the feed port 4.

A sieve plate 8 is arranged in the top air duct 202 on the right side of the baffle plate 7, and the sieve plate 8 is used for sieving large-volume positive and negative electrode materials.

The bottom of the right air duct 203 is provided with a porous plate 9, the porous plate 9 is a "" mechanism, the opening end of the porous plate 9 is aligned with the axial flow fan 3, and the porous plate 9 is used for filtering the membrane and metal debris.

The axial flow fan 3 is connected with the left air duct 201 and the right air duct 203 through a first connecting pipe 10 and a second connecting pipe 11, the first connecting pipe 10 is an air outlet pipe, the second connecting pipe 11 is an air inlet pipe, and the second connecting pipe 11 is aligned with the opening end of the porous plate 9.

The axial flow fan 3 is arranged on the base 1 through a bracket.

The air duct 2 is a tubular structure with a rectangular cross section.

Compared with the prior art, the utility model discloses possess following advantage:

1. the utility model provides a lithium ion battery electricity core closed circuit selection by winnowing is equipped for positive negative pole material and diaphragm are separated, realize the function of edulcoration simultaneously, are applied to lithium ion battery and retrieve the preliminary treatment stage.

2. The utility model discloses an electricity core of section is torn open to the essence, in transportation process, has realized effectively breaing up of positive pole, negative pole, diaphragm, and after the mixed material got into the air separator, realized the diaphragm of low density and the separation of positive negative pole material by the wind of side direction, realized the concentrated recovery of diaphragm, obtained the positive negative pole material of relative pureness after the selection by winnowing.

3. The utility model discloses a selection by winnowing process has avoided a large amount of impurities to get into the subsequent handling with the metal debris effective separation that electric core cutting process produced. The whole system is a closed cycle and discharges quantitatively. The gas discharged quantitatively is conveyed to the lime milk spraying area by the fan, so that effective harmless treatment is realized.

Drawings

For a more clear understanding of the present invention, the present disclosure will be further described by reference to the drawings and illustrative embodiments, which are provided for illustration and are not to be construed as limiting the present disclosure.

FIG. 1 is a schematic view of the present invention;

fig. 2 is a perspective view of the present invention;

fig. 3 is a cross-sectional view of fig. 2 in the present invention.

Shown in the figure: base 1, wind channel 2, axial fan 3, feed inlet 4, discharge gate 5, collection drawer 6, baffling board 7, sieve 8, perforated plate 9, first connecting pipe 10, second connecting pipe 11, wind channel 201, top wind channel 202, right wind channel 203.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Example 1

A sieve plate 8 is arranged in the top air channel 202 on the right side of the baffle plate 7, and the sieve plate 8 is used for sieving large-volume anode and cathode materials.

The bottom of the right air duct 203 is provided with a porous plate 9, the porous plate 9 is a "" shaped mechanism, the open end of the porous plate 9 is aligned with the axial flow fan 3, and the porous plate 9 is used for filtering the membrane and the metal debris.

The axial flow fan 3 is arranged on the base 1 through a bracket.

The air duct 2 is a tubular structure with a rectangular cross section.

Example 2

The utility model discloses a working process does:

the first step, the positive and negative electrode materials of the battery core obtained by fine disassembly are effectively separated from the diaphragm to show different density characteristics, and the battery core smoothly slides downwards along the baffle plate through the feeding hole.

And secondly, after the material passes through the baffle plate, different moving tracks are shown due to different densities of the air outlets. After being blown up, the relatively light diaphragm falls into the diaphragm receiving area. Meanwhile, metal scraps generated in the chopping process fly out along with wind power. The anode and cathode materials with relatively heavy density fall into an independent material receiving area to be directly recovered, and then the next procedure is carried out.

And thirdly, with the falling of the materials, the air enters the axial flow fan after being filtered by the porous plate, and enters the air duct for circulation after being pressurized by the axial flow fan. The whole system is in closed cycle and is discharged quantitatively, and the gas discharged quantitatively is conveyed to the lime milk spraying area by the fan, so that effective harmless treatment is realized.

It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lithium ion battery electricity core closed circuit selection by winnowing is equipped, includes base (1), its characterized in that: install wind channel (2) on base (1), wind channel (2) are "U" column structure, wind channel (2) comprise left wind channel (201), top wind channel (202) and right wind channel (203), install axial fan (3) between left wind channel (201) and the right wind channel (203) of wind channel (2), axial fan (3) make wind flow in wind channel (2) inner loop, feed inlet (4) are installed to the upper end in top wind channel (202), discharge gate (5) are installed to the lower extreme in top wind channel (202), collection drawer (6) are installed to the bottom in right wind channel (203).

2. The lithium ion battery cell closed circuit winnowing device of claim 1, characterized in that: a baffle plate (7) is installed in the top air channel (202) below the feed port (4), the discharge port (5) is aligned to the lower portion of the baffle plate (7), and the baffle plate (7) is used for guiding materials entering the feed port (4).

3. The lithium ion battery cell closed circuit winnowing device of claim 2, characterized in that: the screen plate (8) is installed in the top air channel (202) on the right side of the baffle plate (7), and the screen plate (8) is used for screening large-size anode and cathode materials.

4. The lithium ion battery cell closed circuit winnowing device of claim 1, characterized in that: the bottom in right side wind channel (203) is installed perforated plate (9), perforated plate (9) are "above" form mechanism, axial fan (3) is aimed at to the open end of perforated plate (9), perforated plate (9) are used for filtering diaphragm and metal debris.

5. The lithium ion battery cell closed circuit winnowing device of claim 4, characterized in that: axial fan (3) and left wind channel (201) and right wind channel (203) between be connected through first connecting pipe (10) and second connecting pipe (11), first connecting pipe (10) are for going out the tuber pipe, second connecting pipe (11) are the air-supply line, the open end of perforated plate (9) is aimed at in second connecting pipe (11).

6. The lithium ion battery cell closed circuit winnowing device of claim 1, characterized in that: the axial flow fan (3) is installed on the base (1) through a support.

7. The lithium ion battery cell closed circuit winnowing device of claim 1, characterized in that: the air duct (2) is of a tubular structure with a rectangular cross section.