CN217829801U - Powder mixing equipment - Google Patents

Abstract

The utility model discloses powder mixing equipment, which comprises a first tank body and a plurality of feeding devices, wherein the first tank body is limited with a first cavity; each feeding device comprises an injection pipeline and a driving mechanism, the injection pipelines are arranged along the circumferential direction of the first tank body and are communicated with the first cavity, and the driving mechanism is connected with the injection pipelines and is used for enabling battery powder in the injection pipelines to be injected into the first cavity and mutually collide in the first cavity. Because each injection pipeline is arranged along the circumferential direction of the first tank body, each injection pipeline injects battery powder to the same area of the first cavity, so that the battery powder injected by each injection pipeline can collide with each other in the first cavity, and the battery powder is well mixed.

Description

Powder mixing equipment

Technical Field

The utility model relates to a technical field of battery especially relates to a powder mixing apparatus.

Background

The dry electrode manufacturing process is a preparation technology of a solvent-free electrode material, and the whole process of stirring and coating is solvent-free, so that the dry electrode manufacturing process is environment-friendly.

In the related art, when the electrode material is prepared, a plurality of battery powders need to be mixed and dispersed, and the conventional mixing method of the battery powders generally stirs the battery powders by a stirrer. And because the battery powder does not contain a solvent during stirring, the stirring effect of the stirrer on the battery powder is poor, and the performance of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a powder mixing apparatus can improve the mixed effect of battery powder.

According to the utility model discloses powder mixing apparatus, include:

a first canister defining a first cavity;

and each feeding device comprises an injection pipeline and a driving mechanism, the injection pipeline is communicated with the first cavity, the driving mechanism is connected with the injection pipeline and is used for enabling the battery powder in the injection pipeline to be injected into the first cavity, and the injection pipelines are circumferentially arranged along the first tank body so that the battery powder injected into the first cavity by the injection pipelines can be mutually collided and mixed in the first cavity.

According to the utility model discloses powder mixing apparatus has following beneficial effect at least: the battery powder in each injection pipeline is respectively injected into the first cavity of the first tank body under the action of the driving mechanism, and the battery powder injected by each injection pipeline can mutually collide in the first cavity due to the fact that each injection pipeline is arranged along the circumferential direction of the first tank body, and the battery powder is well mixed.

According to some embodiments of the utility model, each the injection pipeline is on a parallel with the axis of the injection direction of battery powder intersects in the same point, so that each the battery powder that the injection pipeline sprays is in collide each other in the first cavity.

According to some embodiments of the present invention, the injection pipeline includes a guide section having a jet opening, the jet opening is communicated with the first cavity for injecting the battery powder to the first cavity, and the guide section is inclined and arranged downward.

According to some embodiments of the utility model, the feedway still includes reinforced mechanism, reinforced mechanism with the injection pipeline is connected for continuously to the injection pipeline supplies with the battery powder, actuating mechanism includes high pressurized air source, high pressurized air source can to the air current is applyed to the injection pipeline.

According to some embodiments of the present invention, the powder mixing device further comprises a first driving member and a first rotating shaft, the first rotating shaft is disposed in the first cavity and is rotatably connected to the first tank, and the first driving member is used for driving the first rotating shaft to rotate; the powder mixing equipment further comprises a first mixing mechanism, the first mixing mechanism is arranged in the first cavity and connected with the first rotating shaft, and the first mixing mechanism is used for mixing the battery powder; and/or the powder mixing equipment further comprises a first dispersing mechanism, the first dispersing mechanism is connected with the first rotating shaft, and the first dispersing mechanism is used for dispersing the battery powder.

According to some embodiments of the invention, the first mixing mechanism comprises a first helical blade extending along the first rotation axis, the first helical blade having an outer edge that is tapered along a radial distance from the top to the bottom of the first rotation axis.

According to some embodiments of the present invention, the first dispersion mechanism comprises a first dispersion member and a second dispersion member, the first dispersion member and the second dispersion member all are connected with the first rotating shaft, and the second dispersion member is located below the first dispersion member, wherein the first dispersion member is a dispersion disc or a second helical blade, and the second dispersion member is a dispersion impeller.

According to some embodiments of the present invention, the powder mixing device further comprises a second tank, a conveying pipeline, a second driving member and a second rotating shaft, wherein the second tank defines a second cavity and is provided with a discharge port for discharging battery powder, the conveying pipeline is respectively connected to the first tank and the second tank for conveying the battery powder in the first cavity to the second cavity, the second rotating shaft is disposed in the second cavity and is rotatably connected to the second tank, and the second driving member is used for driving the second rotating shaft to rotate; the powder mixing equipment further comprises a second mixing mechanism, wherein the second mixing mechanism is arranged in the second tank body, is connected with the second rotating shaft and is used for mixing the battery powder in the second cavity; and/or the powder mixing equipment further comprises a second dispersing mechanism, and the second dispersing mechanism is arranged in the second tank body, is connected with the second rotating shaft and is used for dispersing the battery powder in the second cavity.

According to the utility model discloses a some embodiments, actuating mechanism includes high pressurized air source, high pressurized air source can to the jet pipeline applys the air current, powder mixing apparatus still includes relief valve and first filter piece, the relief valve set up in the pressure release mouth of the second jar of body, it is right to be used for the second jar of body carries out the pressure release, first filter piece sets up in the pressure release mouth for filter the combustion gas.

According to some embodiments of the utility model, the powder mixing apparatus further comprises: a housing defining a drop passage forming a lower opening at a bottom of the housing, the lower opening communicating with the first cavity; the return pipeline is respectively connected with the second tank body and the shell; the vacuum source is arranged on the shell and is provided with an air suction opening communicated with the falling channel, and the vacuum source is used for conveying the battery powder in the second cavity to the falling channel along the return pipeline; the rotating impeller is rotationally arranged on the falling channel and is positioned below the vacuum source; the second filter element is arranged at the air exhaust port and is used for filtering the gas entering the vacuum source; and the power part is used for driving the rotary impeller to rotate so as to enable the battery powder in the falling channel to enter the first cavity.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic view of the overall structure of a powder mixing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a feeding device according to an embodiment of the present invention;

fig. 3 is a schematic view of the assembly of the first dispersion member and the first tank according to the embodiment of the present invention.

Reference numerals:

the first tank 100, the first chamber 110, the first driving member 120, the first rotating shaft 130, the first mixing mechanism 140, the first dispersing mechanism 150, the first dispersing member 151, the second dispersing member 152, the feeding device 200, the injection pipe 210, the guide section 211, the injection port 2111, the conveying section 212, the driving mechanism 220, the high-pressure gas source 221, the feeding mechanism 230, the storage tank 231, the screw conveying pump 232, the second tank 300, the second chamber 310, the pressure relief port 311, the discharge port 312, the valve 313, the second driving member 320, the second rotating shaft 330, the second dispersing mechanism 340, the pressure relief valve 350, the first filter member 360, the conveying pipe 370, the housing 400, the dropping passage 410, the rotating impeller 420, the return pipe 430, the vacuum source 440, the second filter member 450, and the funnel 460.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

According to the utility model discloses a powder mixing device, referring to fig. 1, comprising a first tank 100 and a plurality of feeding devices 200, wherein the first tank 100 is limited with a first cavity 110; each of the supply units 200 includes a plurality of injection pipes 210 arranged along a circumference of the first can 100 and communicating with the first cavity 110, and a driving mechanism 220 (see fig. 2) connected to the injection pipes 210 for causing the battery powders in the injection pipes 210 to be injected into the first cavity 110 and collide with each other in the first cavity 110.

Specifically, the battery powders in each injection pipe 210 are respectively injected into the first cavity 110 of the first can 100 by the corresponding driving mechanism 220. Since the injection pipes 210 are arranged along the circumferential direction of the first can 100, the battery powders injected into the first cavity 110 by the injection pipes 210 can collide with each other in the first cavity 110, and the battery powders are well mixed.

In addition, compare and directly adopt the agitator to stir battery powder among the prior art, make battery powder reach required mixed effect, the agitator of mixing apparatus needs longer time to stir battery powder, leads to the wearing and tearing of mixing apparatus more serious and the consumption is great (required power is great when agitator stirs battery powder, and the consumption that produces is also great). Compared with the prior art, the battery powder material collision method is used for mixing the battery powder material, the abrasion of the mixing equipment is obviously reduced, and the power consumption of the mixing equipment is also reduced.

It should be noted that when the battery powder enters the first cavity 110, the battery powder is too fast, and the main material (the battery powder is divided into the main material, the auxiliary material and the binder) may be crushed into secondary particles, which affects the performance of the battery powder; the battery powder has too low speed and poor dispersion effect. In the present embodiment, the speed of the battery powder entering the first cavity 110 is controlled by controlling the operation of the driving mechanism 220 to be between 80m/s and 120 m/s. In addition, 3 to 6 feeding devices 200 are arranged, so that the working efficiency of the powder mixing equipment is met, and the mixing effect of the battery powder is also met.

The driving mechanism 220 may be a high-pressure air source 221, but other mechanisms may also be adopted. The high-pressure gas source 221 is connected to one end of the injection pipeline 210 far away from the first tank 100, and a gas outlet of the high-pressure gas source 221 is communicated with an inner cavity of the injection pipeline 210. After the battery powder enters the injection pipeline 210, the high-pressure air source 221 applies an air flow into the injection pipeline 210 from one end of the injection pipeline 210, the air flow enters the first cavity 110 of the first tank 100 along the injection pipeline 210, the air flow drives the battery powder in the injection pipeline 210 to rapidly enter the first cavity 110 in the flowing process, and the battery powder collides with the battery powder injected by other injection pipelines 210, so that the battery powder is mixed.

In some embodiments, the mixing is performed in order to allow a high probability of the cell powders meeting in the first chamber 110, thereby collision mixing. The plurality of injection pipes 210 are uniformly arranged in sequence along the circumferential direction of the first can 100, and the axes of the injection pipes 210 parallel to the injection direction of the battery powder intersect at the same point. Specifically, when the battery powder is sprayed to the first cavity 110 of the first can 100 by each spraying pipe 210, the battery powder sprayed by each spraying pipe 210 moves to the same position, that is, the central area of the first can 100, so that the battery powder sprayed by each spraying pipe 210 collides with each other in the central area of the first can 100, and thus, the battery powder collides more probably, and the mixing effect of the battery powder is further improved.

Further, referring to fig. 1 and 2, the injection pipeline 210 includes a conveying section 212 and a guiding section 211, the conveying section 212 is connected to the guiding section 211, the high-pressure gas source 221 is connected to an end of the conveying section 212 far from the guiding section 211, and the conveying section 212 is provided with a charging opening for charging the conveying section 212 with the battery powder. The end of the guide section 211 far away from the conveying section 212 is provided with an injection port 2111, the guide section 211 is fixedly connected with the side wall of the first tank 100 and is arranged obliquely downwards, the injection port 2111 is communicated with the first cavity 110, and the battery powder is injected into the first cavity 110 of the first tank 100 obliquely downwards through the injection port 2111. Specifically, when the battery powder enters the first cavity 110 obliquely and downwards through the injection port 2111, the force applied to the battery powder can be decomposed into a horizontal force and a vertical force, wherein the horizontal force is a collision force, so that the battery powder can collide with each other in the first cavity 110 to achieve mixing of the battery powder, and the vertical force enables the battery powder to be rapidly deposited in the first tank 100.

In some embodiments, the feeding device 200 further comprises a feeding mechanism 230, the feeding mechanism 230 further comprises a storage tank 231 and a screw conveying pump 232 (refer to the figure), the storage tank 231 is used for storing the battery powder, the outlet of the bottom of the storage tank 231 is connected with the inlet of the screw conveying pump 232, and the outlet of the screw conveying pump 232 is connected with the feeding port of the injection pipeline 210. Specifically, the battery powder in the storage tank 231 gradually falls into the screw conveying pump 232 under the action of gravity, and the battery powder is continuously conveyed to the injection pipeline 210 under the action of the screw conveying pump 232; wherein, the faster the rotation speed of the helical blade of the screw conveying pump 232 is, the faster the conveying speed of the battery powder by the screw conveying pump 232 is.

The screw transfer pump 232 is a forced transfer structure of the battery powder, and the screw transfer pump 232 is in a sealed state when the screw transfer pump 232 transfers the battery powder, so that the gas generated from the high-pressure gas source 221 does not pass through the screw transfer pump 232 and the battery powder is blown into the storage tank 231 again. In addition, when the air current moves along injection pipeline 210, the air current makes the position of charge door form the negative pressure when passing through the charge door on the contrary, is favorable to screw rod delivery pump 232 to carry the battery powder to injection pipeline 210 in.

In some embodiments, the powder mixing apparatus further comprises a first driving member 120 and a first rotating shaft 130, the first rotating shaft 130 is vertically disposed in the first chamber 110, a lower end of the first rotating shaft 130 is rotatably connected to the bottom of the first tank 100, and an upper end of the first rotating shaft 130 extends from the top of the first tank 100 and is rotatably connected to the top of the first tank 100. The first driving member 120 is a motor, a driving shaft of the motor is connected to an upper end of the first rotating shaft 130, and the motor drives the first rotating shaft 130 to rotate. Further, the powder mixing apparatus further includes a first mixing mechanism 140 and a first dispersing mechanism 150, the first mixing mechanism 140 is connected to the first rotating shaft 130, the first mixing mechanism 140 may be disposed at a position lower than the injection ports 2111 of the injection duct 210, but may be disposed at a position higher than or equal to the injection ports 211, and the first mixing mechanism 140 further mixes the battery powder while rotating synchronously with the first rotating shaft 130. The first dispersing mechanism 150 is connected to the first rotating shaft 130, the first dispersing mechanism 150 is located right below the first mixing mechanism 140, and the first dispersing mechanism 150 disperses the mixed battery powders while rotating synchronously with the first rotating shaft 130.

Specifically, after the plurality of feeding devices 200 convey the battery powders to the first cavity 110, the battery powders collide with each other in the first cavity 110 and are primarily mixed. The primarily mixed battery powders fall downwards to the position of the first mixing mechanism 140, at this time, since the first driving member 120 drives the first rotating shaft 130 to rotate, the first rotating shaft 130 drives the first mixing mechanism 140 to rotate, and the first mixing mechanism 140 further mixes the battery powders. The battery powders passing through the first mixing mechanism 140 continuously fall to the position of the first dispersing mechanism 150, and at this time, the first dispersing mechanism 150 is also under the action of the first rotating shaft 130, the first dispersing mechanism 150 and the first rotating shaft 130 rotate synchronously, and the first dispersing mechanism 150 disperses the falling battery powders. As can be seen from the above, by the arrangement of the first mixing mechanism 140 and the first dispersing mechanism 150 in a matching manner, the first mixing mechanism 140 can better mix the battery powders, i.e. the multiple battery materials are mixed more uniformly, so that the first dispersing mechanism 150 can better disperse the battery powders.

It should be noted that when the battery powder enters the first cavity 110, the battery powder is acted by a vertical force, and the battery powder can be rapidly deposited at the position of the first mixing mechanism 140, so as to enter the next battery powder mixing process.

Instead of the above scheme, the first rotating shaft 130 is only provided with the first mixing mechanism 140, so that after the battery powder is subjected to collision mixing, the battery powder falls to the position of the first mixing mechanism 140, and after the battery powder is preliminarily mixed by the first mixing mechanism 140, the battery powder is discharged through the discharge hole at the bottom of the first tank 100; or, the first rotating shaft 130 is only provided with the first dispersing mechanism 150, so that after the battery powder is collided and mixed, the battery powder falls to the position of the first dispersing mechanism 150, and after the first dispersing mechanism 150 primarily disperses the battery powder, the battery powder is discharged through the discharge hole at the bottom of the first tank 100.

In some embodiments, the first mixing mechanism 140 includes a first helical blade and a connecting member (not shown), the first helical blade is extended along the axial direction of the first rotating shaft 130, and the upper end of the first helical blade is connected to the first rotating shaft 130 through the connecting member. The radial distance from the inner edge of the first helical blade to the first rotation axis 130 is gradually reduced in the top-down direction until it is connected to the first rotation axis 130, and the radial distance from the outer edge of the first helical blade to the first rotation axis 130 is gradually reduced. First helical blade adopts above-mentioned structure, and the battery powder is at first helical blade in-process, and first helical blade progressively mixes the battery powder, makes the battery powder obtain effectual mixture, and difficult appearance stops up.

In some embodiments, the first dispersion mechanism 150 includes a first dispersion member 151 and a second dispersion member 152, the second dispersion member 152 is a dispersion impeller, the first dispersion member 151 and the second dispersion member 152 are both connected to the first rotating shaft 130, and the first dispersion member 151 is disposed between the second dispersion member 152 and the first mixing mechanism 140, i.e., directly above the second dispersion member 152, and directly below the first mixing mechanism 140. Specifically, after the battery powder is acted by the first mixing mechanism 140, the battery powder falls to the position of the first dispersing member 151, and the first dispersing member 151 performs preliminary dispersion on the battery powder. After the battery powder is primarily dispersed, the battery powder falls to the position of the second dispersing member 152, and the second dispersing member 152 further disperses the battery powder. As can be seen from the above, the first dispersion member 151 and the second dispersion member 152 are cooperatively disposed, and the first dispersion member 151 and the second dispersion member 152 gradually disperse the battery powder, so that the battery powder is sufficiently dispersed.

Further, the first dispersion member 151 is a second spiral blade (refer to fig. 3) having an inner edge connected to the circumferential surface of the first rotating shaft 130 and an outer edge spaced apart from the first rotating shaft 130 in the radial direction at the same interval. First dispersion member 151 adopts above-mentioned structure, and when first dispersion member 151 dispersed the battery powder, first dispersion member 151 had the effect of carrying the battery powder down, and the battery powder can be carried to dispersion impeller fast, has guaranteed powder mixing apparatus's work efficiency.

In some embodiments, referring to fig. 1, the powder mixing apparatus further comprises a mixing and dispersing device, the mixing and dispersing device further comprises a second tank 300, a conveying pipe 370, a second driving member 320 and a second rotating shaft 330, the second tank 300 defines a second cavity 310, one end of the conveying pipe 370 is connected with the discharge port of the first tank 100, the other end of the conveying pipe is connected with the feed port of the second tank 300, and the conveying pipe 370 is used for conveying the battery powder in the first tank 100 into the second tank 300. The second rotating shaft 330 is vertically arranged in the second cavity 310, the lower end of the second rotating shaft 330 is rotatably connected with the bottom of the second tank 300, and the upper end of the second rotating shaft 330 extends out of the top of the second tank 300 and is rotatably connected with the second tank 300. The second driving member 320 is a motor, a driving shaft of the motor is connected to the second rotating shaft 330, and the motor drives the second rotating shaft 330 to rotate. The mixing and dispersing device further includes a second mixing mechanism (not shown in the figure), which is connected to the second rotating shaft 330 and is used for stirring the battery powders in the second tank 300 when rotating synchronously with the second rotating shaft 330, so that the battery powders are fully mixed.

The second mixing mechanism is disposed instead of the second rotating shaft 330, the mixing and dispersing device further includes a second dispersing mechanism 340, the second dispersing mechanism 340 is connected to the second rotating shaft 330, and the second dispersing mechanism 340 is used for dispersing the battery powder in the second tank 300 when rotating synchronously with the second rotating shaft 330. Of course, the first rotating shaft 130 is provided with both the second mixing mechanism and the second dispersing mechanism 340, and thus the mixing and dispersing device is used for both the agitation and the dispersion of the battery powder.

In some embodiments, the powder mixing apparatus further comprises a pressure relief valve 350 and a first filter 360, the second tank 300 has a pressure relief opening 311, and the pressure relief valve 350 and the first filter 360 are disposed at the pressure relief opening 311. When the pressure relief valve 350 is closed, the pressure relief valve 350 closes the pressure relief opening 311; when the relief valve 350 is opened, the relief port 311 is opened, and the gas in the second tank 300 can be discharged through the relief port 311. The first filter 360 may be a cotton filter, and when the pressure relief opening 311 discharges gas, the first filter 360 is used to prevent the battery powder from being discharged through the pressure relief opening 311.

It will be appreciated that by providing a pressure relief valve 350 in the second tank 300, the pressure relief port 311 vents when the pressure relief valve 350 opens, avoiding excessive air pressure in the first tank 100. And when the air flow passes through the conveying pipeline 370, the air flow can carry the battery powder in the first tank 100, so that the battery powder in the first tank 100 is automatically conveyed to the second tank 300.

Further, the first tank 100 has a discharge opening 312 at the bottom thereof, and the discharge opening 312 is provided with a valve 313. When the dispersion degree of the battery powder meets the dispersion requirement, the valve 313 of the discharge opening 312 is opened, and the dispersed battery powder is discharged through the discharge opening 312. During the discharging process of the battery powder, the screw conveying pump 232 is in a closed state, and the high-pressure air source 221 is in an open state, at this time, the air flow passes through the first tank 100, the conveying pipeline 370 and the second tank 300 in sequence, and is discharged through the discharge port 312. In the air flow discharging process, the air flow generated by the high-pressure air source 221 can discharge the battery powder in the first tank 100 and the second tank 300 quickly, and the discharge is cleaner.

In some embodiments, the powder mixing apparatus further comprises a backflow mechanism comprising a backflow pipe 430, a housing 400, a vacuum source 440, and a second filter 450, wherein the housing 400 defines a vertically disposed falling passage 410, and the falling passage 410 forms a lower opening at the bottom of the housing 400, and the lower opening is communicated with the feed inlet of the first tank 100. The one end of the return pipe 430 is connected with the discharge hole of the second tank 300, and the other end is connected with the feed inlet of the housing 400, so that the return pipe 430 is used for communicating the second tank 300 with the falling channel 410 of the housing 400. A vacuum source 440 is provided at the top and side of the housing 400, the vacuum source 440 having a pumping port communicating with the drop passage 410. Specifically, when the vacuum source 440 is in an open state, the vacuum source 440 makes the inside of the casing 400 and the inside of the return pipe 430 be in a negative pressure state, the battery powder is conveyed to the casing 400 along the return pipe 430, and the casing 400 conveys the battery powder to the first cavity 110 again. Therefore, through the arrangement of the backflow mechanism, the powder mixing equipment can circularly mix and disperse the battery powder, so that the battery powder can quickly meet the dispersion requirement. The second filter 450 is a cotton filter screen, the cotton filter screen is disposed at the air extraction opening of the vacuum source 440, and the cotton filter screen is used for preventing the battery powder from leaking through the vacuum source 440.

Further, the backflow mechanism further includes a power member (not shown) and a rotary impeller 420, the rotary impeller 420 is rotatably disposed in the dropping passage 410, and the height of the rotary impeller 420 is lower than that of the vacuum source 440. The power member is a motor, and a driving shaft of the motor is connected with the rotary impeller 420 to drive the rotary impeller 420 to rotate. Specifically, the vacuum source 440 evacuates the second can 300 through the return pipe 430, and the battery powder in the second can 300 is transported to the falling passage 410 along the return pipe 430. When the battery powder is transferred to the dropping passage 410, the battery powder drops along the dropping passage 410 to the surface of the rotating impeller 420. The power member drives the rotary impeller 420 to vertically rotate, and the battery powder on the surface of the rotary impeller 420 falls into the first tank 100 along the falling channel 410, so that the battery powder is circularly mixed and dispersed.

It should be noted that the gap between the rotary impeller 420 and the inner wall of the falling passage 410 is small, for example, at least less than 6 mm, and is small enough, so that the rotary impeller 420 can be used to block the battery powder in the first can 100 from flowing upward to the vacuum source 440 when the vacuum source 440 pumps the battery powder in the second can 300, thus ensuring the circulation of the battery powder between the first can 100 and the second can 300.

Furthermore, the backflow mechanism further includes a funnel 460, the funnel 460 is disposed on the top of the first tank 100 and is communicated with the first cavity 110, the housing 400 is connected to the funnel 460, and the battery powder falls into the funnel 460 after passing through the rotary impeller 420, and then falls into the first cavity 110. As can be seen from the above, the funnel 460 is provided to facilitate the collection of the battery powder passing through the rotary impeller 420 for transportation to the first tank 100.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Powder mixing apparatus, its characterized in that includes:

a first canister defining a first cavity;

the feeding devices comprise injection pipelines and driving mechanisms, the injection pipelines are communicated with the first cavity, the driving mechanisms are connected with the injection pipelines and are used for enabling battery powder in the injection pipelines to be injected into the first cavity, and the injection pipelines are circumferentially arranged along the first tank body so that the battery powder injected into the first cavity by the injection pipelines can mutually collide and mix in the first cavity.

2. The powder mixing apparatus according to claim 1, wherein axes of said ejection ducts parallel to the ejection direction of said battery powder intersect at the same point, so that the battery powder ejected from said ejection ducts collide with each other and are mixed in said first chamber.

3. The powder mixing apparatus according to claim 1, wherein said ejection duct comprises a guide section having an ejection port communicating with said first chamber for ejecting the battery powder toward said first chamber, said guide section being disposed obliquely downward.

4. The powder mixing apparatus according to claim 1, wherein said feeding means further comprises a feeding mechanism connected to said ejection duct for continuously supplying battery powder to said ejection duct, and said driving mechanism comprises a high-pressure gas source capable of applying a gas flow to said ejection duct.

5. The powder mixing device according to any one of claims 1 to 4, further comprising a first driving member and a first rotating shaft, wherein the first rotating shaft is disposed in the first cavity and is rotatably connected to the first tank, and the first driving member is configured to drive the first rotating shaft to rotate;

the powder mixing equipment further comprises a first mixing mechanism, the first mixing mechanism is arranged in the first cavity and is connected with the first rotating shaft, and the first mixing mechanism is used for mixing the battery powder;

and/or the powder mixing equipment further comprises a first dispersing mechanism, the first dispersing mechanism is connected with the first rotating shaft, and the first dispersing mechanism is used for dispersing the battery powder.

6. The powder mixing apparatus of claim 5, wherein said first mixing mechanism comprises a first helical blade extending along said first rotational axis, and wherein a radial distance from an outer edge of said first helical blade to said first rotational axis decreases in a top-to-bottom direction.

7. The powder mixing apparatus of claim 6, wherein the first dispersion mechanism comprises a first dispersion member and a second dispersion member, both of which are connected to the first rotating shaft, and the second dispersion member is located below the first dispersion member, wherein the first dispersion member is a dispersion disk or a second helical blade, and the second dispersion member is a dispersion impeller.

8. The powder mixing device of claim 1, further comprising a second tank, a conveying pipeline, a second driving member and a second rotating shaft, wherein the second tank defines a second cavity and is provided with a discharge port for discharging battery powder, the conveying pipeline is respectively connected with the first tank and the second tank and is used for conveying the battery powder in the first cavity to the second cavity, the second rotating shaft is arranged in the second cavity and is rotatably connected with the second tank, and the second driving member is used for driving the second rotating shaft to rotate;

the powder mixing equipment further comprises a second mixing mechanism, the second mixing mechanism is arranged in the second tank body, is connected with the second rotating shaft and is used for mixing the battery powder in the second cavity;

and/or the powder mixing equipment further comprises a second dispersing mechanism, wherein the second dispersing mechanism is arranged in the second tank body, is connected with the second rotating shaft and is used for dispersing the battery powder in the second cavity.

9. The powder mixing apparatus according to claim 8, wherein said driving mechanism comprises a high-pressure air source capable of applying an air flow to said injection conduit, said powder mixing apparatus further comprising a pressure relief valve disposed at a pressure relief opening of said second tank for relieving pressure in said second tank, and a first filter member disposed at a pressure relief opening for filtering an exhaust air.

10. The powder mixing apparatus of claim 8, further comprising:

a housing defining a drop passage forming a lower opening at a bottom of the housing, the lower opening being in communication with the first cavity;

the return pipeline is respectively connected with the second tank body and the shell;

the vacuum source is arranged on the shell and is provided with an air suction opening communicated with the falling channel, and the vacuum source is used for conveying the battery powder in the second cavity to the falling channel along the return pipeline;

the rotating impeller is rotatably arranged on the falling channel and is positioned below the vacuum source;

the second filter element is arranged at the air exhaust port and is used for filtering the gas entering the vacuum source;

and the power part is used for driving the rotary impeller to rotate so as to enable the battery powder in the falling channel to enter the first cavity.

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