Batching mechanism, batching system and working method for pneumatic batching of lithium batteries

Abstract

The present invention belongs to the technical field of lithium battery production, and particularly relates to a batching mechanism, a system and a working method thereof for a pneumatic batching system of lithium batteries. This batching mechanism is applied to a batching system including a pneumatic mixing tank. The batching mechanism includes: a feed cylinder, a stock storage component and a number of batching components; wherein the feed cylinder is in a pagoda shape and is connected to the pneumatic mixing tank, and each of the batching components is respectively arranged on the corresponding side wall layer of the feed cylinder; each of the batching components is connected to the stock storage component and is respectively used to obtain raw materials of different masses and feed the obtained raw materials into the feed cylinder. The batching mechanism of this system can batch-feed raw materials with different ratios into the feed cylinder according to the required batching, and pre-mix the raw materials batch-fed into the feed cylinder through a blowing mechanism and then feed them into the pneumatic mixing tank for mixing. The particle size and fineness of the powder after mixing by this system are both improved.

Description

[0001] This application is a divisional application. The original application number is: 202211210210.4. The application date is: September 30, 2022. The name of the invention is: Batching system for pneumatic mixing of powders and its working method. Technical Field

[0002] The invention belongs to the technical field of lithium battery production, and in particular relates to a batching system for pneumatic mixing of powder materials and a working method thereof. Background Art

[0003] When producing lithium batteries, multiple powders need to be mixed.

[0004] Traditional mixing methods use paddle-type mixing tanks, but because this easily disrupts the solid morphology during mixing, pneumatic mixing is now being used instead. For example, CN114247360A discloses a method for mixing solid materials for lithium batteries. This method uses a gas to suspend the powder, which is then mixed and stirred by airflow. The resulting powder has improved particle size and fineness. Currently, the powders to be mixed are often weighed and fed into a pneumatic mixing tank for stirring, which takes a long time to achieve uniform mixing.

[0005] Therefore, based on the above problems, it is necessary to design a batching system for pneumatic mixing of powders, which can batch multiple powders in batches and directly pre-mix them before sending them into a pneumatic mixing tank, and its working method is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The object of the present invention is to provide a batching system for pneumatic mixing of powder materials and a working method thereof.

[0007] In order to solve the above technical problems, the present invention provides a batching system for pneumatic mixing of powder materials, which comprises:

[0008] The pneumatic mixing tank has a batching device on its side wall;

[0009] The batching device includes: a feeding cylinder connected to the pneumatic mixing tank, a batching mechanism for injecting materials into the feeding cylinder, and an air supply mechanism;

[0010] The air supply mechanism is suitable for blowing air into the feed barrel, so as to pre-mix the raw materials fed into the feed barrel in batches through the batching mechanism in real time and then feed them into the pneumatic mixing tank.

[0011] In another aspect, the present invention further provides a method for operating the batching system for pneumatic mixing of powder materials as described above, comprising:

[0012] Mix the raw materials by setting up a pneumatic mixing tank;

[0013] Feed materials into the pneumatic mixing tank through the feed hopper of the batching device;

[0014] Batch-feed materials into the feed hopper through the batching mechanism of the batching device;

[0015] Pre-mix the materials batch-fed into the feed hopper through the air supply mechanism of the batching device and then send them into the pneumatic mixing tank.

[0016] The beneficial effect of the present invention is that the batching mechanism of the present invention can batch-feed raw materials with different ratios into the feed hopper according to the required batching, pre-mix the raw materials batch-fed into the feed hopper through the air supply mechanism and then send them into the pneumatic mixing tank for mixing, that is, mixing can be carried out while weighing. Compared with directly feeding all the raw materials into the pneumatic mixing tank for mixing, the particle size and fineness of the powder after mixing by this system are both improved.

[0017] Other features and advantages of the present invention will be described in the following specification, and part of them will be obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0018] To make the above objectives, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the batching system for powder pneumatic mixing of the present invention;

[0021] Figure 2 is an enlarged view of the batching device of the batching system for powder pneumatic mixing of the present invention;

[0022] Figure 3 is a schematic structural diagram of the batching mechanism of the batching system for powder pneumatic mixing of the present invention;

[0023] Figure 4 is a cross-sectional view of the batching hole loading of the batching system for powder pneumatic mixing of the present invention;

[0024] Figure 5 is a cross-sectional view of the air injection box feeding of the batching system for powder pneumatic mixing of the present invention.

[0025] In the figure:

[0026] Pneumatic mixing tank 1;

[0027] Batching device 2, feeding cylinder 21, feeding hole 211, batching mechanism 22, stock storage assembly 221, stock storage box 2211, batching assembly 222, rotating batching ring 2221, batching nozzle 2222, batching hole 2223, air blowing box 2224, cylinder 2225, air supply mechanism 23. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] As Figure 1 shown, this embodiment provides a batching system for powder pneumatic mixing, which includes: a pneumatic mixing tank 1, on the side wall of which a batching device 2 is provided; wherein the batching device 2 includes: a feeding cylinder 21 communicated with the pneumatic mixing tank 1, a batching mechanism 22 for injecting materials into the feeding cylinder 21, and an air supply mechanism 23; the air supply mechanism 23 is adapted to blow air into the feeding cylinder 21 to pre-mix the raw materials batchwise put into the feeding cylinder 11 through the batching mechanism 22 and then send them into the pneumatic mixing tank 1.

[0030] In this embodiment, specifically, the batching mechanism 22 can batchwise put raw materials with different ratios into the feeding cylinder 11 according to the required batching, and pre-mix the raw materials batchwise put into the feeding cylinder 11 through the air supply mechanism 23 and then send them into the pneumatic mixing tank 1 for mixing, that is, it can mix while weighing. Compared with directly putting all the raw materials into the pneumatic mixing tank 1 for mixing, the particle size and fineness of the mixed powder of this system are both improved.

[0031] As Figure 2 shown, in this embodiment, the batching mechanism 22 includes: a stock storage assembly 221 and a plurality of batching assemblies 222; wherein the feeding cylinder 21 is in a pagoda shape, and each of the batching assemblies 222 is respectively arranged on the corresponding side wall layer of the feeding cylinder 21; each of the batching assemblies 222 is connected to the stock storage assembly 221 and is respectively used to obtain raw materials with different masses and send the obtained raw materials into the feeding cylinder 21.

[0032] In this embodiment, the stock component 221 includes: a number of stock bins 2211; wherein each of the stock bins 2211 stores the corresponding raw material, and each of the batching components 222 is connected to each stock bin 2211; each of the batching components 222 is adapted to feed the corresponding raw material with the corresponding mass into the feed cylinder 21 respectively.

[0033] In this embodiment, specifically, each of the batching components 222 is controlled by a control module; optionally, the feed cylinder 21 is in the shape of a three-layer pagoda, and each side wall layer is sleeved with a batching component 222 respectively. Each of the batching components 222 can obtain the raw materials in each stock bin 2211, and the amount of raw materials obtained by each batching component 222 each time is different (the amount obtained each time can be set to 1 gram, 10 grams, 20 grams respectively). According to the required batching, the corresponding batching component 222 is controlled to obtain the corresponding raw material for a corresponding number of times, and the obtained raw materials are fed into the feed cylinder 21 in real time. Air is blown into the feed cylinder 21 by the air supply mechanism 23 to premix the raw materials fed into the feed cylinder 21 and then fed into the pneumatic mixing tank 1 for mixing, so as to improve the particle size and fineness of the mixed powder.

[0034] As Figure 3 , Figure 4 , Figure 5 shown, in this embodiment, the batching component 222 includes: a rotating batching ring 2221 and a number of batching nozzles 2222; wherein the rotating batching ring 2221 is sleeved on the corresponding side wall layer of the feed cylinder 21 and rotates (the feed cylinder 21 does not rotate, and the rotating batching ring 2221 is controlled by the control module to rotate slowly), and a number of batching holes 2223 are formed on its side wall; each of the batching nozzles 2222 is respectively communicated with the corresponding stock bin 2211 and abuts against the side wall of the rotating batching ring 2221 to inject materials into the batching holes 2223 when the batching holes 2223 rotate to their nozzle openings (the batching nozzles 2222 abut against the side wall of the rotating batching ring 2221 and are not fixedly connected to the rotating batching ring 2221); a blowing box 2224 is respectively arranged at the rear side of each of the batching nozzles 2222, and a number of feed holes 211 corresponding to the corresponding blowing boxes 2224 are formed on the side wall layer of the feed cylinder 21, that is, the blowing box 2224 is adapted to blow the raw materials contained in the batching holes 2223 into the feed cylinder 21 through the feed holes 211.

[0035] In this embodiment, specifically, sealing rings are provided on the bottom end surfaces of the batching nozzles 2222 and the blowing boxes 2224 for dynamic sealing with the rotating batching ring 2221; each rotating batching ring 2221 is respectively connected to a corresponding driver, and the driver can be but is not limited to a servo motor. A gear is provided at the driving end of the servo motor, and teeth adapted to the gear are provided on the side walls of each rotating batching ring 2221, that is, the control module drives the corresponding rotating batching ring 2221 to rotate by controlling the corresponding servo motor; a plurality of feed holes 211 are opened on each side wall layer of the feed cylinder 21 (the number of feed holes 211 is adapted to the number of storage bins 2211. Optionally, the number in this embodiment is set to three). The rotating batching ring 2221 is sleeved on the side wall layer of the feed cylinder 21 and rotates on the side wall layer. A plurality of batching holes 2223 are evenly opened on the rotating batching ring 2221, so that the batching holes 2223 obtain raw materials when rotating to the corresponding batching nozzles 2222 (the batching nozzles 2222 and the storage bins 2211 are connected by hoses, so that the batching holes 2223 are filled with raw materials when passing through the batching nozzles 2222, and the raw materials fall into the batching holes 2223 naturally by gravity), and continue to rotate after being filled with raw materials, and the raw materials in the batching holes 2223 are blown into the feed cylinder 21 through the corresponding blowing boxes 2224 (the positions of the blowing boxes 2224 correspond to the positions of the feed holes 211. When the batching holes 2223 rotate below the blowing boxes 2224, that is, the blowing boxes 2224, the batching holes 2223, and the feed holes 211 are communicated to blow the raw materials in the batching holes 2223 into the feed cylinder 21); as Figure 4 , Figure 5 shown, a sealing block is provided between the corresponding blowing box 2224 and the batching nozzle 2222 to seal the batching hole 2223 filled with raw materials, preventing the raw materials from spilling out of the batching hole 2223 during the process of rotating below the blowing box 2224 after the batching hole 2223 is filled with raw materials.

[0036] In this embodiment, the sizes of the batching holes 2223 on each of the rotating batching rings 2221 are different to load raw materials of different masses.

[0037] In this embodiment, specifically, the sizes of the batching holes 2223 on each rotating batching ring 2221 are different to satisfy that the amounts of raw materials obtained by the batching holes 2223 on each rotating batching ring 2221 are 1 gram, 10 grams, and 20 grams respectively for each time.

[0038] In this embodiment, a cylinder 2225 is provided on each of the batching nozzles 2222; the cylinder 2225 is adapted to push the batching nozzle 2222 away from the batching hole 2223 to stop feeding.

[0039] In this embodiment, specifically, the cylinder 2225 is connected to the control module; the cylinder 2225 is arranged on the mounting bracket, and its telescopic end is connected to the corresponding dosing nozzle 2222. When the dosing of the dosing nozzle 2222 stops, the control module controls the cylinder 2225 to extend, driving the dosing nozzle 2222 to closely adhere to the side wall of the rotating dosing ring 2221 and move along the axial direction of the rotating dosing ring 2221, so that the dosing nozzle 2222 moves away from the rotation path of the dosing hole 2223, that is, the dosing stops; the conditions for the control module to control the dosing nozzle 2222 to stop dosing are as follows: First, at the end of dosing, control all dosing nozzles 2222 to move away from the rotation path of the dosing hole 2223; Second, during the dosing process, there is no need to configure the raw materials with the corresponding weight.

[0040] In this embodiment, when mixing and stirring the raw materials of the lithium battery, first, the control module controls the rotation of each rotating dosing ring 2221. When the dosing hole 2223 on the rotating dosing ring 2221 rotates to the lower part of the dosing nozzle 2222, the raw materials in the storage box 2211 fall into the dosing hole 2223 through the dosing nozzle 2222. The rotating dosing ring 2221 continues to rotate, moving the dosing hole 2223 filled with raw materials from the lower part of the dosing nozzle 2222 to the lower part of the air blowing box 2224, so that the air blowing box 2224 blows the raw materials in the dosing hole 2223 into the feeding cylinder 21 through the feeding hole 211 (wherein, the feeding holes 211 on the air blowing box 2224 and the feeding cylinder 21 do not move and are relatively fixed in position, and the rotating dosing ring 2221 rotates to make the dosing hole 2223 rotate between the feeding hole 211, the air blowing box 2224 and the dosing nozzle 2222, that is, loading is carried out when the dosing hole 2223 rotates to the lower part of the dosing nozzle 2222, and unloading is carried out when it rotates to the lower part of the air blowing box 2224); Second, since the lithium battery requires a variety of raw materials, several dosing nozzles 2222, several feeding holes 211, and several air blowing boxes 2224 can be arranged according to the types of raw materials on the periphery of a single rotating dosing ring 2221. One dosing nozzle 2222, one feeding hole 211, and one air blowing box 2224 form a group to load and unload one kind of raw material. The number of dosing holes 2223 is much larger than the number of dosing nozzles 2222 to achieve continuous operation through the rotation of the rotating dosing ring 2221; Finally, several rotating dosing rings 2221 are arranged on the side wall of the feeding cylinder 21, and the sizes of the dosing holes 2223 on each rotating dosing ring 2221 are different, so that the amount of raw materials loaded by each rotating dosing ring 2221 each time is different to meet the requirements of different ratios and different dosing amounts of the lithium battery raw materials.

[0041] In this embodiment, optionally, it is assumed that there are three raw materials A, B, and C for the lithium battery raw materials. 55 grams of raw material A, 21 grams of raw material B, and 10 grams of raw material C are required. The number of storage bins 2211 is three, which are respectively used to store the three raw materials A, B, and C. The number of rotary batching rings 2221 is set to three, and the single acquisition amounts of the batching holes 2223 are 1 gram, 10 grams, and 20 grams respectively. That is, during the process of the control module controlling the rotation of each rotary batching ring 2221, after the batching hole 2223 with a single acquisition amount of 20 grams acquires raw material A twice, the control module controls the corresponding cylinder to drive the batching nozzle 2222 for injecting raw material A away from the rotation path of the batching hole 2223; and after the batching hole 2223 with a single acquisition amount of 20 grams acquires raw material B once, the control module controls the corresponding cylinder to drive the batching nozzle 2222 for injecting raw material B away from the rotation path of the batching hole 2223; and after the batching hole 2223 with a single acquisition amount of 20 grams acquires raw material C zero times, the control module controls the corresponding cylinder to drive the batching nozzle 2222 for injecting raw material C away from the rotation path of the batching hole 2223. Similarly, after the batching hole with a single acquisition amount of 10 grams acquires raw material A, raw material B, and raw material C once, zero times, and once respectively, the control module controls the corresponding cylinder to drive the corresponding batching nozzle away from the rotation path of the batching hole. Similarly, after the batching hole with a single acquisition amount of 1 gram acquires raw material A, raw material B, and raw material C five times, once, and zero times respectively, the control module controls the corresponding cylinder to drive the corresponding batching nozzle away from the rotation path of the batching hole. That is, the configuration of 55 grams of raw material A, 21 grams of raw material B, and 10 grams of raw material C is completed.

[0042] This embodiment also provides a working method for the batching system for powder pneumatic mixing as described above, which includes: mixing raw materials by setting the pneumatic mixing tank 1; feeding materials into the pneumatic mixing tank 1 through the feeding cylinder 21 of the batching device 2; batch-feeding materials into the feeding cylinder 21 through the batching mechanism 22 of the batching device 2; and pre-mixing the materials batch-fed into the feeding cylinder 11 through the air supply mechanism 23 of the batching device 2 and then sending them into the pneumatic mixing tank 1.

[0043] For the specific structure and implementation process of the batching system for powder pneumatic mixing, refer to the relevant discussions in the above embodiments, and details are not described herein again.

[0044] In summary, the batching mechanism 22 of the present invention can batch-feed raw materials with different ratios into the feeding cylinder 11 according to the required batching, pre-mix the raw materials batch-fed into the feeding cylinder 11 through the air supply mechanism 23 and then send them into the pneumatic mixing tank 1 for mixing, that is, it can mix while weighing. Compared with directly putting all the raw materials into the pneumatic mixing tank 1 for mixing, the particle size and fineness of the powder after mixing in this system are both improved.

[0045] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0047] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant workers can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An ingredient dispensing mechanism, characterized in that, An ingredient feeding system applied to powder pneumatic mixing including a pneumatic mixing tank; The ingredient feeding mechanism includes: a feeding cylinder, a stockpiling component, and several ingredient feeding components; where The feeding cylinder is in a pagoda shape and is connected to the pneumatic mixing tank, and each of the ingredient feeding components is respectively arranged on the corresponding side wall layer of the feeding cylinder; Each of the ingredient feeding components is connected to the stockpiling component and is respectively used to obtain raw materials of different masses and feed the obtained raw materials into the feeding cylinder; The stockpiling component includes: several stockpiling boxes; where Each of the stockpiling boxes stores the corresponding raw materials, and each of the ingredient feeding components is connected to each of the stockpiling boxes; Each of the ingredient feeding components is adapted to respectively feed the corresponding raw materials of the corresponding mass into the feeding cylinder; The ingredient feeding component includes: a rotating ingredient feeding ring and several ingredient feeding nozzles; where The rotating ingredient feeding ring is sleeved on the corresponding side wall layer of the feeding cylinder and rotates, and several ingredient feeding holes are formed in its side wall; Each of the ingredient feeding nozzles is respectively connected to the corresponding stockpiling box and abuts against the side wall of the rotating ingredient feeding ring to inject materials into the ingredient feeding holes when the ingredient feeding holes rotate to their nozzle openings; A blowing box is respectively arranged at the rear side of each of the ingredient feeding nozzles, and several feeding holes corresponding to the corresponding blowing boxes are formed in the side wall layer of the feeding cylinder, that is The blowing box is adapted to blow the raw materials contained in the ingredient feeding holes into the feeding cylinder through the feeding holes; The sizes of the ingredient feeding holes on each of the rotating ingredient feeding rings are all different to load raw materials of different masses.

2. The ingredient feeding mechanism according to claim 1, wherein A cylinder is arranged on each of the ingredient feeding nozzles; The cylinder is adapted to push the ingredient feeding nozzle away from the ingredient feeding hole to stop material injection.

3. An ingredient system for pneumatic mixing of powder materials, characterized in that, Including: A pneumatic mixing tank; An ingredient feeding device, which includes: the ingredient feeding mechanism according to claim 1, and a air supply mechanism.

4. A working method of an ingredient feeding system for powder pneumatic mixing according to claim 3, wherein Mix raw materials by setting a pneumatic mixing tank; Feed materials into the pneumatic mixing tank through the feeding cylinder of the ingredient feeding device; batch-feed materials into the feeding cylinder through the ingredient feeding mechanism of the ingredient feeding device.

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