CN219024189U - Powder feeding equipment and pulping system - Google Patents

Abstract

The application discloses throw powder equipment and slurrying system. The powder feeding device comprises a powder feeding device, a buffer device and a first valve, wherein the powder feeding device comprises a powder feeding tank; the buffer device comprises a buffer tank provided with a feed inlet, and the feed inlet is connected with the powder feeding tank through a first conveying pipeline; the first valve is arranged at the position of the first conveying pipeline, which is close to the feed inlet, relative to the powder feeding tank. The powder in the buffer tank can be prevented from entering the powder throwing tank through the first conveying pipeline, and the powder throwing tank sprays out, so that air dust pollution is reduced.

Description

Powder feeding equipment and pulping system

Technical Field

The application relates to the technical field of battery production, in particular to powder feeding equipment and a pulping system.

Background

Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The battery may include a cadmium nickel battery, a hydrogen nickel battery, a lithium ion battery, a secondary alkaline zinc manganese battery, and the like.

At present, the homogenization procedure of battery production needs to automatically add various raw materials into a stirring device for pulping, wherein the automatic conveying of powder materials is involved. In the powder conveying process, powder spraying phenomenon easily occurs in powder feeding equipment, and air dust pollution is caused.

Disclosure of Invention

The embodiment of the application provides powder throwing equipment and a pulping system, which can reduce air dust pollution of the powder throwing equipment.

In a first aspect, an embodiment of the present application provides a powder feeding device, including a powder feeding device, a buffer device, and a first valve, where the powder feeding device includes a powder feeding tank; the buffer device comprises a buffer tank provided with a feed inlet, and the feed inlet is connected with the powder feeding tank through a first conveying pipeline; the first valve is arranged at the position of the first conveying pipeline, which is close to the feed inlet, relative to the powder feeding tank.

In the scheme, powder in the powder throwing tank is firstly conveyed to the cache tank, as the first valve is arranged in the first conveying pipeline connecting the powder throwing tank with the cache tank, the first valve is relatively close to the feed inlet of the cache tank, the first valve is closed, the powder in the cache tank can be prevented from entering the powder throwing tank through the first conveying pipeline, the powder throwing tank sprays out, and air dust pollution is reduced.

In some embodiments, the buffer device further comprises a first vacuum line for communicating with the buffer tank and a second valve disposed on the first vacuum line.

In the scheme, the first vacuum pipeline is connected with the external vacuum pump, the second valve is opened, the buffer tank is vacuumized to form negative pressure, powder in the powder feeding tank is conveniently conveyed to the buffer tank, and conveying efficiency is improved; and powder in the buffer tank can be further prevented from entering the powder feeding tank through the first conveying pipeline and being sprayed out of the powder feeding tank, so that air dust pollution is reduced.

In some embodiments, the caching apparatus further includes a first breather coupled to the caching tank, the first vacuum line coupled to the first breather.

In the above scheme, when the filter element of the first respirator can prevent to vacuumize the cache tank, the powder is pumped away, and the air dust pollution is further reduced. After powder is conveyed from the powder throwing tank to the caching tank, the first breather can keep balance between the caching tank and external air pressure, so that powder in the caching tank can fall into the stirring device smoothly.

In some embodiments, the caching apparatus further includes a first vibrator disposed on the first ventilator.

In the scheme, the first vibrator generates vibration during operation, so that powder adhered to the inner wall of the first respirator falls off, and the phenomenon of powder accumulation and blockage is reduced.

In some embodiments, the buffer device further comprises a first blowing member disposed on the first ventilator, the first blowing member for blowing the powder adhered to the inner wall of the first ventilator.

In the above-mentioned scheme, not only can reduce the powder of adhesion on first respirator by first jetting piece, when blanking moreover, first jetting piece can keep the internal atmospheric pressure of buffer tank for the gravity blanking speed of powder.

In some embodiments, the buffer tank comprises a first tank section and a second tank section which are connected with each other, the feed inlet is arranged on the first tank section, the second tank section is provided with a discharge outlet which is used for being connected with the stirring device, and the second tank section is in a reducing arrangement from the first tank section to the direction of the stirring device.

In the scheme, the second tank section is arranged into a shape with gradually reduced cross-sectional area, so that powder in the buffer tank can fall into the stirring device conveniently.

In some embodiments, the buffer device further comprises a second blowing member disposed at the second tank section, the second blowing member for blowing the powder adhered to the inner wall of the second tank section.

In the above scheme, because the second tank section is the slope setting, consequently the powder adhesion more easily on the inner wall of second tank section, the powder on the inner wall of second tank section of reducible adhesion of second jetting piece.

In some embodiments, the powder feeding device further comprises a second respirator and a third valve, wherein the second respirator is connected with the first conveying pipeline, and the third valve is arranged on a connecting pipeline for connecting the second respirator and the first conveying pipeline.

In the above scheme, when the buffer tank is subjected to vacuum feeding, the second breather is communicated with the outside and the first conveying pipeline by opening the third valve, so that the first conveying pipeline is maintained in a positive pressure state, and powder is convenient to flow into the buffer tank with negative pressure.

In some embodiments, the first conveying pipeline comprises a first sub-pipe and a second sub-pipe which are sequentially connected, the first sub-pipe is connected with the powder feeding tank, the second sub-pipe is connected with the feeding port, and the second sub-pipe is a hose.

In the scheme, the second sub-pipe is set to be a hose, so that the hose has the characteristics of good flexibility, easiness in bending, light weight and the like, is convenient to adapt to cache tanks at different distances and different positions, is convenient to carry, and increases the use scene of the powder feeding equipment. And the hose is easy to disassemble and assemble, and if the second sub-pipe is blocked by powder, the second sub-pipe is convenient to disassemble and clean.

In some embodiments, the buffer device further comprises a first motor and a first stirring shaft connected with the first motor, the first stirring shaft is inserted into the buffer tank, and the first motor is used for driving the first stirring shaft to rotate.

In the scheme, the first stirring shaft is driven by the first motor to stir the powder in the cache tank, so that the uniformity of the powder in the cache tank can be improved.

In a second aspect, an embodiment of the present application provides a pulping system, including a stirring device and a powder feeding device according to any one of the foregoing embodiments, where the stirring device includes a stirring tank, and a discharge port of the buffering tank is connected with the stirring tank.

In some embodiments, the pulping system further comprises a second conveying pipeline and a fourth valve arranged on the second conveying pipeline, and the discharge port of the buffer tank is connected with the stirring tank through the second conveying pipeline.

In the scheme, the on-off of the second conveying pipeline is controlled through the fourth valve, so that the consumption of powder falling into the stirring tank from the buffer tank is conveniently controlled.

In some embodiments, the pulping system further comprises a second vibrator and/or a third blowing member disposed on the second delivery line. The second vibrator and/or the third blowing member can reduce powder adhering to the second conveying pipe.

In some embodiments, the stirring device further comprises a third breather disposed on the stirring tank, the third breather being connected to the stirring tank, and a fifth valve disposed on a connection line connecting the third breather to the stirring tank.

In the scheme, in the blanking process, the fifth valve is opened, and the third respirator can maintain the balance between the air pressure in the stirring tank and the outside, so that the powder can fall into the stirring tank conveniently.

In some embodiments, the stirring device further comprises a second vacuum line and a sixth valve disposed on the second vacuum line, the second vacuum line being connected to the stirring tank.

In the scheme, in the stirring process of pulping, the stirring tank is vacuumized through the second vacuum pipeline, so that bubbles can be prevented from being stored in the pulp, and the uniformity of the pulp is improved.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a powder feeding apparatus according to some embodiments of the present application;

FIG. 2 is a schematic diagram of a pulping system according to some embodiments of the present application;

FIG. 3 is a schematic diagram of a pulping system according to other embodiments of the present application;

FIG. 4 is a schematic structural view of a pulping system according to still other embodiments of the present application;

FIG. 5 is a schematic diagram of a pulping system according to still other embodiments of the present application;

fig. 6 is a schematic structural view of a pulping system according to still other embodiments of the present application.

The reference numerals are as follows:

powder feeding device 100; a powder feeding device 10; a powder feeding tank 11; a fourth respirator 12; a fourth vibrator 13; a buffer unit 20; a cache tank 21; a feed port 21a; a discharge port 21b; a first delivery line 22; a first sub-pipe 221; a second sub-pipe 222; a first motor 231; a first stirring shaft 232; a first vacuum line 241; a second valve 242; a first respirator 251; a first pressure sensor 252; a first vibrator 253; a first blowing member 254; a first tank segment 211; a second tank section 212; a weight sensor 26; a second blowing member 213; a third vibrator 214; a second respirator 271; a third valve 272; a third pressure sensor 28; a second motor 291; an impeller 292; a first valve 31; a stirring device 400; a stirring tank 40; a third motor 511; a second stirring shaft 512; a fourth motor 521; a third stirring shaft 522; a second transfer line 531; a fourth valve 532; a pig cylinder 54; a second vibrator 55; a third blowing member 56; a third respirator 571; a fifth valve 572; a fourth pressure sensor 58; a second vacuum line 591; sixth valve 592.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

Batteries, such as lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, have the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, and are widely applied to electric devices suitable for batteries. For example, the electric device may be a vehicle, a cellular phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others.

A battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector without the positive electrode active material layer protrudes out of the current collector coated with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated to serve as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector without the negative electrode active material layer protrudes out of the current collector coated with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated to serve as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene).

At present, the homogenization procedure of battery production needs to automatically add various raw materials into mixing equipment for pulping, wherein the automatic conveying of powder materials is involved. The powder is conveyed and is required to be introduced into the buffer tank, the buffer tank adopts a gravity blanking mode and falls down to the inside of the stirring device by means of gravity of the powder, and stirring and pulping are carried out in the stirring device. In the falling process of powder in the buffer tank, the powder is easy to enter the powder feeding tank due to the fact that the blowing device is arranged in the buffer tank, and the powder is sprayed out of the powder feeding tank, so that air dust pollution is caused.

In order to solve the technical problems, the application designs powder feeding equipment which comprises a powder feeding device, a buffer device and a first valve, wherein the powder feeding device comprises a powder feeding tank; the buffer device comprises a buffer tank provided with a feed inlet, and the feed inlet is connected with the powder feeding tank through a first conveying pipeline; the first valve is arranged at a position of the first conveying pipeline, which is close to the feed inlet. In the scheme, powder in the powder throwing tank is firstly conveyed to the cache tank, as the first valve is arranged in the first conveying pipeline connecting the powder throwing tank with the cache tank and is close to the feeding port of the cache tank, the powder in the cache tank can be prevented from entering the powder throwing tank through the first conveying pipeline by closing the first valve, and the powder throwing tank sprays out, so that air dust pollution is reduced.

It should be noted that, the powder throwing device of the embodiment of the application is particularly suitable for being used as a powder throwing device for preparing battery pole piece slurry, but is not limited to be used as a powder throwing device for preparing battery pole piece slurry, and if other devices are used for the powder throwing device provided by the application, the powder throwing device should fall into the protection scope of the application.

Fig. 1 is a schematic structural diagram of a powder feeding apparatus according to some embodiments of the present application; fig. 2 is a schematic structural diagram of a pulping system according to some embodiments of the present application.

Referring to fig. 1 and fig. 2 in combination, an embodiment of the present application provides a powder feeding apparatus 100, including a powder feeding device 10, a buffer device 20 and a first valve 31, where the powder feeding device 10 includes a powder feeding tank 11; the buffer device 20 comprises a buffer tank 21 provided with a feed inlet 21a, and the feed inlet 21a is connected with the powder feeding tank 11 through a first conveying pipeline 22; the first valve 31 is provided at a position of the first delivery pipe 22 near the feed port 21 a.

The battery pole piece is prepared by coating slurry on a current collector and drying the slurry. Before the slurry is prepared, the powder for preparing the slurry is required to be mixed. The powder feeding tank 11 may be disposed at a side of the buffer tank 21, and the powder is fed from the powder feeding tank 11 and then transferred from the powder feeding tank 11 to the buffer tank 21. The buffer tank 21 is arranged above the stirring device 400, the buffer tank 21 is provided with a discharge port 21b for being connected with the stirring device 400, and powder in the buffer tank 21 falls into the stirring device 400 by gravity.

The first valve 31 is illustratively a pneumatic ball valve, which is a ball valve fitted with a pneumatic actuator that is relatively fast in speed, and whose fastest opening and closing speed can be up to 0.05 seconds/time, so that it is also commonly known as a pneumatic quick disconnect ball valve. The pneumatic ball valve has the advantages of small fluid resistance, simple structure, small volume, light weight, good sealing performance and the like. In addition, the first valve 31 may also include a shut-off valve, a check valve, or the like.

In the above-described scheme, the powder in the powder feeding tank 11 is first conveyed to the buffer tank 21, and then the powder in the buffer tank 21 falls into the stirring device 400. Because the first valve 31 is arranged in the first conveying pipeline 22 connecting the powder feeding tank 11 and the buffer tank 21, and the first valve 31 is close to the feed inlet 21a of the buffer tank 21, when the powder in the buffer tank 21 falls into the stirring device 400, the first valve 31 is closed, so that the powder in the buffer tank 21 can be prevented from entering the powder feeding tank 11 through the first conveying pipeline 22, and is sprayed out by the powder feeding tank 11, and the air dust pollution is reduced.

Fig. 3 is a schematic structural view of a pulping system according to other embodiments of the present application. As shown in fig. 3, in some embodiments, the buffer device 20 further includes a first vacuum line 241 and a second valve 242 disposed on the first vacuum line 241, the first vacuum line 241 being configured to communicate with the buffer tank 21.

The second valve 242 can also be a pneumatic ball valve, and has the advantages of small fluid resistance, simple structure, small volume, light weight, good sealing performance and the like. In addition, the second valve 242 may also include a shut-off valve, a check valve, and the like.

In the above scheme, the first vacuum pipeline 241 is connected with an external vacuum pump, the second valve 242 is opened, and the buffer tank 21 is vacuumized to form negative pressure, so that powder in the powder feeding tank 11 is conveniently conveyed to the buffer tank 21, and the conveying efficiency is improved; and further, the powder in the buffer tank 21 can be prevented from entering the powder feeding tank 11 through the first conveying pipeline 241, and the powder is sprayed out of the powder feeding tank 11, so that the air dust pollution is reduced.

In some embodiments, the caching apparatus 20 further includes a first breather 251 coupled to the caching tank 21, the first vacuum line 241 being coupled to the first breather 251.

The first respirator 251 is internally provided with a filter element which can breathe but does not leak powder. When the vacuum pumping is needed, the second valve 242 is opened, powder cannot enter the first vacuum pipeline 241 due to the blocking of the filter element in the first breather 251, and air in the buffer tank 21 is pumped out by the first breather 251 through the first vacuum pipeline 241.

In the above scheme, the filter element of the first respirator 251 can prevent the powder from being pumped away when the buffer tank 21 is vacuumized, so as to further reduce air dust pollution. After the powder is transferred from the powder feeding tank 11 to the buffer tank 21, the first breather 251 can keep the buffer tank 21 and the external air pressure balanced, so that the powder in the buffer tank 21 can fall into the stirring device 400 smoothly.

Optionally, a first pressure sensor 252 is provided on the first ventilator 251. When the buffer tank 21 is evacuated, the vacuum degree in the first breather 251 can be checked by the first pressure sensor 252. When the gravity blanking process is performed, the first pressure sensor 252 can determine whether the internal air pressure of the first respirator 251 is balanced with the external air pressure. A second pressure sensor may also be provided on the buffer tank 21 to detect the air pressure inside the buffer tank 21. The second pressure sensor is arranged close to the first valve 31, so that whether the first valve 31 leaks air or not can be judged conveniently, and whether the sealing performance of the second pressure sensor is good or not can be detected.

In some embodiments, the caching apparatus 20 further includes a first vibrator 253, the first vibrator 253 being disposed on the first breather 251.

The vibrator has a working part of a rod-shaped hollow cylinder, an eccentric vibrator is arranged in the vibrator, and the vibrator is driven by a motor to rotate at a high speed so as to generate high-frequency micro-amplitude vibration. Wherein, the first vibrator 253 can be a bin wall vibrator, and the inner wall of the first respirator 251 can be prevented from being stuck with powder due to the periodic high-frequency vibration of the inner wall of the first respirator 251 generated by the high-speed rotation of the vibration motor. The first vibrator 253 may be an electromagnetic vibrator, and has the advantages of simple structure, no easy-to-wear rotating member, long service life, and the like compared with a mechanical vibrator.

In the above scheme, the first vibrator 253 can vibrate during operation, so that powder adhered to the inner wall of the first respirator 251 falls off, and the phenomenon of powder accumulation and blockage is reduced.

In some embodiments, the buffer device 20 further includes a first blowing member 254 disposed on the first ventilator 251, the first blowing member 254 for blowing the powder adhered to the inner wall of the first ventilator 251.

The first blowing member 254 may be an air disk, and combines the combined effects of vibration and air injection, so as to easily and smoothly discharge various materials from various types of bins. The vibration effect of the air disc directly acts on the powder, so that bad influence on the storage bin can be reduced after long-term use, the occupied space is small, the installation is convenient, the maintenance cost is low, and the use is convenient.

The first blowing member 254 is disposed above the first respirator 251 to blow and back blow the air into the first respirator 251, so that the powder adhering to the inner wall of the first respirator 251 and the filter element can be reduced.

In addition, when blanking, the first valve 31 is closed, so that the buffer tank 21 is isolated from the outside, and the first blowing member 254 blows and blows back the gas into the first respirator 251, so that the gas pressure in the buffer tank 21 can be kept, and the gravity blanking speed of the powder can be accelerated.

Further, in the gravity blanking process, the gas periodically blown into the buffer tank 21 by the first blowing member 254 forms an instant high pressure, and blanking is performed under the condition of positive pressure, so that the blanking speed is further improved.

In some embodiments, the buffer tank 21 includes a first tank section 211 and a second tank section 212 connected to each other, the feed inlet 21a is disposed in the first tank section 211, the second tank section 212 is provided with a discharge outlet 21b for connection with the stirring device 400, and the second tank section 212 is disposed in a tapered manner from the first tank section 211 toward the stirring device 400.

The first tank section 211 may be a rectangular parallelepiped or a cylindrical body, and the second tank section 212 may be an inverted cone, with its sidewall surface inclined inwardly from top to bottom. Providing the second tank section 212 in a shape with a gradually decreasing cross-sectional area can facilitate the fall of the powder in the buffer tank 21 into the stirring device 400.

Optionally, a weight sensor 26 is disposed in the buffer tank 21, and the weight of the powder in the buffer tank 21 can be detected by the weight sensor 26, so that the weight of the powder falling into the stirring device 400 is calculated, and the control of raw materials during the preparation of slurry is facilitated.

Fig. 4 is a schematic structural view of a pulping system according to still other embodiments of the present application. As shown in fig. 4, in some embodiments, the buffer device 20 further includes a second blowing member 213 disposed on the second tank section 212, and the second blowing member 213 is configured to blow powder adhering to the inner wall of the second tank section 212.

The second blowing member 213 may be a gas disk. Since the second tank section 212 is inclined, the powder is more likely to adhere to the inner wall of the second tank section 212, and the second blowing member 213 can reduce the powder adhering to the inner wall of the second tank section 212.

A third vibrator 214 may be further disposed on the second tank segment 212, where the third vibrator 214 may include an air hammer, which is a special device, and uses the aerodynamic principle to adjust the knocking force by adjusting the air supply pressure to knock the outer wall of the device. The third vibrator 214 vibrates the side wall surface of the second tank section 212, and accelerates the falling of the powder adhering to the inner wall surface of the second tank section 212, and falls into the stirring device 400.

Fig. 5 is a schematic structural view of a pulping system according to still other embodiments of the present application. As shown in fig. 5, in some embodiments, the powder feeding apparatus 100 further includes a second ventilator 271 and a third valve 272, the second ventilator 271 is connected with the first conveying line 22, and the third valve 272 is disposed on a connection line connecting the second ventilator 271 and the first conveying line 22.

The third valve 272 may also be a pneumatic ball valve, which has the advantages of small fluid resistance, simple structure, small volume, light weight, good sealing performance, etc. The third valve 272 may be a shut-off valve, a check valve, or the like.

In the above scheme, when the buffer tank 21 is vacuum-fed, the second breather 271 is connected with the first delivery pipe 22 through opening the third valve 272, so as to maintain the positive pressure of the first delivery pipe 22, and facilitate the powder to flow into the buffer tank 21 with negative pressure.

A third pressure sensor 28 may be installed on the first sub-pipe 221 of the first conveying pipe 22, for detecting the air pressure in the first conveying pipe 22, so as to determine whether the air pressure of the first conveying pipe 22 is balanced with the external air pressure, so as to facilitate conveying the powder to the buffer tank 21.

In addition, the powder feeding device 100 may further include a second motor 291 and an impeller 292 connected to an output shaft of the second motor 291, where the impeller 292 is disposed in the first sub-pipe 221 of the first conveying pipeline 22, and the second motor 291 may drive the impeller 292 to rotate so as to crush powder in the first conveying pipeline 22, so as to prepare slurry of the battery pole piece.

A fourth breather 12 can be arranged on the powder feeding tank 11 to maintain the air pressure balance between the powder feeding tank 11 and the outside, keep the powder feeding tank 11 in a positive pressure state, and facilitate the conveying of powder. In addition, a fourth vibrator 13 may be provided on the powder charging tank 11, and the fourth vibrator 13 may vibrate the wall of the powder charging tank 11 to accelerate loosening of the powder adhering to the inner wall surface of the powder charging tank 11. The powder feeding tank 11 may be divided into two sections in the vertical direction, and the lower section is in a tapered arrangement, i.e., an inverted cone structure, so that the powder is conveyed into the first conveying pipeline 22.

In some embodiments, the first conveying pipeline 22 includes a first sub-pipe 221 and a second sub-pipe 222 connected in sequence, the first sub-pipe 221 is connected with the powder feeding tank 11, the second sub-pipe 222 is connected with the feed inlet 21a, and the second sub-pipe 222 is a hose.

The material of the second sub-pipe 222 may include polyurethane, rubber, etc., is abrasion resistant, and has good chemical resistance and air tightness. The second sub-pipe 222 is a hose, has the characteristics of good flexibility, easiness in bending, light weight and the like, is convenient to adapt to the cache tanks 21 with different distances and different positions, is convenient to carry, and increases the use scene of the powder feeding device 100.

In some embodiments, the buffering device 20 further includes a first motor 231 and a first stirring shaft 232 connected to the first motor 231, the first stirring shaft 232 is inserted into the buffering tank 21, and the first motor 231 is used for driving the first stirring shaft 232 to rotate.

In the above scheme, the first motor 231 drives the first stirring shaft 232 to stir the powder in the buffer tank 21, so that the uniformity of the powder in the buffer tank 21 can be improved, and more uniform slurry can be prepared after the powder falls into the stirring device 400.

Alternatively, the first motor 231 is an explosion-proof motor, which is a motor that can be used in flammable and explosive places, and does not generate electric spark during operation. For the environment of the mixed powder of the slurry for preparing the battery pole piece by stirring, the safety can be improved by adopting the explosion-proof motor.

In a second aspect, the embodiment of the present application provides a pulping system, including a stirring device 400 and the powder feeding apparatus 100 of any of the foregoing embodiments, where the stirring device 400 includes a stirring tank 40, and a discharge port 21b of the buffer tank 21 is connected to the stirring tank 40.

The powder in the powder feeding tank 11 is conveyed into the buffer tank 21 by the first conveying pipeline 22, and the powder in the buffer tank 21 falls into the stirring tank 40 again. Because the first valve 31 is arranged in the first conveying pipeline 22 connecting the powder feeding tank 11 and the buffer tank 21, and the first valve 31 is close to the feed inlet 21a of the buffer tank 21, when the powder in the buffer tank 21 falls into the stirring tank 40, the first valve 31 is closed, so that the powder in the buffer tank 21 can be prevented from entering the powder feeding tank 11 through the first conveying pipeline 22, and is sprayed out by the powder feeding tank 11, and the air dust pollution is reduced.

The pulping system further comprises a third motor 511 and a second stirring shaft 512 connected to the third motor 511, a fourth motor 521 and a third stirring shaft 522 connected to the fourth motor 521. The second stirring shaft 512 and the third stirring shaft 522 are respectively inserted into the stirring tank 40, and the third motor 511 drives the second stirring shaft 512 to rotate, and is mainly used for mixing slurry; the fourth motor 521 drives the third stirring shaft 522 to rotate, mainly for dispersing slurry.

Fig. 6 is a schematic structural view of a pulping system according to still other embodiments of the present application. As shown in fig. 6, in some embodiments, the pulping system further includes a second conveying pipeline 531 and a fourth valve 532 disposed on the second conveying pipeline 531, and the discharge port 21b of the buffer tank 21 is connected to the agitation tank 40 through the second conveying pipeline 531.

The fourth valve 532 may also be a pneumatic ball valve, which has the advantages of small fluid resistance, simple structure, small volume, light weight, good sealing performance, etc. The fourth valve 532 may be a shut-off valve, a check valve, or the like.

In the above scheme, the fourth valve 532 is used to control the on-off state of the second conveying pipeline 531, so as to control the consumption of the powder falling into the stirring tank 40 from the buffer tank 21.

The second conveying pipeline 531 can be further provided with a pipe cleaning air cylinder 54, and powder in the second conveying pipeline 531 is pushed to be conveyed downwards through the air cylinder, so that the problem that the powder in the second conveying pipeline 531 is blocked is avoided.

In some embodiments, the pulping system further comprises a second vibrator 55 and/or a third blowing member 56 arranged on the second transfer line 531. The second vibrator 55 and/or the third blowing member 56 may reduce powder adhering to the second conveying line 531.

The second vibrator 55 may be a bin wall vibrator, an electromagnetic vibrator, an air hammer, or the like. The third blowing member 56 may be a gas disk. Only the second vibrator 55 or the third blowing element 56 may be provided in the second transfer line 531, or the second vibrator 55 and the third blowing element 56 may be provided at the same time. The second vibrator 55 and/or the third blowing member 56 may reduce powder adhering to the second conveying line 531.

In some embodiments, the stirring device 400 further includes a third breather 571 disposed on the stirring tank 40 and a fifth valve 572, the third breather 571 being connected to the stirring tank 40, the fifth valve 572 being disposed on a connection line connecting the third breather 571 and the stirring tank 40.

The fifth valve 572 can also be a pneumatic ball valve, and has the advantages of small fluid resistance, simple structure, small volume, light weight, good sealing performance and the like. The fifth valve 572 may be a shut-off valve, a check valve, or the like.

In the above-mentioned scheme, in the blanking process, the fifth valve 572 is opened, and the third breather 571 can maintain the air pressure in the stirring tank 40 to be balanced with the outside, so that the powder falls into the stirring tank 40.

When blanking starts, the fourth valve 532 and the fifth valve 572 are opened, the first valve 31 is closed to isolate the buffer tank 21 from the powder feeding tank 11, and powder in the buffer tank 21 rapidly falls into the stirring tank 40 through the fourth valve 532 and the second conveying pipeline 531 under the action of gravity, the first blowing member 254, the second blowing member 213, the first vibrator 253, the third vibrator 214 and the temporary positive pressure in the formed buffer tank 21.

A fourth pressure sensor 58 may also be provided on the agitator tank 40 to detect the air pressure inside the agitator tank 40 to facilitate determining whether the air pressure in the agitator tank 40 is in equilibrium with the outside.

In some embodiments, the stirring device 400 further includes a second vacuum line 591 and a sixth valve 592 disposed on the second vacuum line 591, the second vacuum line 591 being connected to the stirring tank 40. In the stirring process of pulping, the stirring tank 40 is vacuumized through the second vacuum pipeline 591, so that gas stored in the pulp can be pumped away, bubbles in the pulp can be prevented, and the uniformity of the pulp can be improved.

According to some embodiments of the present application, the embodiments of the present application provide a powder feeding apparatus 100, including a powder feeding device 10, a buffer device 20, and a first valve 31, where the powder feeding device 10 includes a powder feeding tank 11; the buffer device 20 comprises a buffer tank 21 provided with a feed port 21a and a discharge port 21b, wherein the feed port 21a is connected with the powder feeding tank 11 through a first conveying pipeline 22, and the discharge port 21b is used for being connected with the stirring device 400; the first valve 31 is provided at a position of the first delivery pipe 22 near the feed port 21 a.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (15)

1. A powder feeding apparatus, comprising:

the powder feeding device comprises a powder feeding tank;

the buffer device comprises a buffer tank provided with a feed inlet, and the feed inlet is connected with the powder feeding tank through a first conveying pipeline;

the first valve is arranged at the position, close to the feed inlet, of the first conveying pipeline relative to the powder feeding tank.

2. The powder feeding device of claim 1, wherein the buffer device further comprises a first vacuum line and a second valve disposed on the first vacuum line, the first vacuum line being configured to communicate with the buffer tank.

3. The powder delivery apparatus of claim 2, wherein the buffer device further comprises a first ventilator coupled to the buffer tank, the first vacuum line coupled to the first ventilator.

4. A powder delivery apparatus as claimed in claim 3, wherein the buffer means further comprises a first vibrator provided on the first ventilator.

5. A powder delivery apparatus according to claim 3, wherein the buffer means further comprises a first blowing member provided on the first respirator, the first blowing member being for blowing powder adhering to an inner wall of the first respirator.

6. The powder feeding device according to claim 1, wherein the buffer tank comprises a first tank section and a second tank section which are connected with each other, the feed inlet is formed in the first tank section, the second tank section is provided with a discharge outlet for being connected with a stirring apparatus, and the second tank section is arranged in a tapered manner from the first tank section to the stirring apparatus.

7. The powder delivery apparatus of claim 6, wherein the buffer device further comprises a second blowing member disposed on the second tank segment, the second blowing member being configured to blow powder adhering to an inner wall of the second tank segment.

8. The powder delivery apparatus of claim 1, further comprising a second ventilator coupled to the first delivery line and a third valve disposed on a connection line connecting the second ventilator to the first delivery line.

9. The powder feeding device according to claim 1, wherein the first conveying pipeline comprises a first sub-pipe and a second sub-pipe which are sequentially connected, the first sub-pipe is connected with the powder feeding tank, the second sub-pipe is connected with the feeding port, and the second sub-pipe is a hose.

10. The powder feeding device of claim 1, wherein the buffering device further comprises a first motor and a first stirring shaft connected with the first motor, the first stirring shaft is inserted into the buffering tank, and the first motor is used for driving the first stirring shaft to rotate.

11. A pulping system comprising:

the stirring device comprises a stirring tank;

the powder feeding device according to any one of claims 1 to 10, wherein a discharge port of the buffer tank is connected with the stirring tank.

12. The pulping system of claim 11, further comprising a second delivery line and a fourth valve disposed on the second delivery line, wherein the discharge port of the buffer tank is connected to the agitator tank via the second delivery line.

13. Pulping system according to claim 12, characterized in that the pulping system further comprises a second vibrator and/or a third blowing element arranged on the second transportation line.

14. The pulping system of claim 11, wherein the agitation device further comprises a third breather disposed on the agitation tank and a fifth valve disposed on a connection line connecting the third breather and the agitation tank.

15. The pulping system of claim 14, wherein the agitation device further comprises a second vacuum line and a sixth valve disposed on the second vacuum line, the second vacuum line being connected to the agitation tank.

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