Stirring device and lithium battery production equipment

Abstract

The utility model relates to a stirring device and lithium battery production equipment. A stirring device comprises a storage mechanism used for storing powder, the storage mechanism is provided with a feeding port and a discharging port, and the powder in the storage mechanism can be quantitatively discharged through the discharging port; the stirring mechanism is provided with an inlet which can be communicated with the discharge hole; the first sensor is connected to the stirring mechanism, and the first sensor is used for weighing the powder entering the stirring mechanism through the inlet; the material returning assembly comprises a material returning pipe and a suction part, the material returning pipe is connected to the stirring mechanism, the suction part communicates with the feeding port and the material returning pipe, and the suction part is used for sucking the powder in the stirring mechanism to the feeding port through the material returning pipe. According to the stirring device and the lithium battery production equipment, if excessive powder is discharged from the discharge port of the storage mechanism due to powder agglomeration and caking and the like, the stirring mechanism does not need to be opened to manually scoop out the excessive powder, and the operation is more convenient and quicker.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery production, and in particular to a stirring device and lithium battery production equipment. Background Art

[0002] In the lithium battery production process, one of the steps is to stir the powder. In order to realize this process, a storage mechanism and a stirring mechanism are generally set up. The powder to be added is stored in the storage mechanism. By opening the discharge port of the storage mechanism, the powder can be quantitatively added to the stirring mechanism. A weighing sensor is provided on the stirring mechanism to weigh and verify the weight of the powder in the stirring mechanism. During the feeding process, if the powder agglomerates, it may cause too much powder to be discharged from the discharge port of the storage mechanism, and the weight of the powder entering the stirring mechanism will exceed the target value. At this time, the stirring mechanism needs to be opened to scoop out the excess powder, which is a more troublesome operation. Utility Model Content

[0003] Based on this, it is necessary to provide a stirring device and lithium battery production equipment. If too much powder is discharged from the storage mechanism outlet due to powder agglomeration or other reasons, there is no need to open the stirring mechanism to manually scoop out the excess powder, and the operation is more convenient and quick.

[0004] A stirring device, comprising:

[0005] A storage mechanism, used for storing powder, the storage mechanism having a feed port and a discharge port, and the powder in the storage mechanism can be quantitatively discharged through the discharge port;

[0006] A stirring mechanism having an inlet capable of communicating with the discharge port;

[0007] a first sensor connected to the stirring mechanism, the first sensor being used to weigh the weight of the powder entering the stirring mechanism through the inlet; and

[0008] The return material assembly includes a return material pipe and a suction piece, wherein the return material pipe is connected to the stirring mechanism, the suction piece is connected to the feed port and the return material pipe, and the suction piece is used to suck the powder in the stirring mechanism to the feed port through the return material pipe.

[0009] In one embodiment, the stirring mechanism includes a metering tank and a stirring tank, the metering tank has the inlet, the metering tank also has a first outlet that can be connected to the stirring tank, and a second outlet that can be connected to the return pipe, the first sensor is connected to the metering tank, and is used to weigh the weight of the powder in the metering tank.

[0010] In one embodiment, the metering tank includes a tank body and a discharge pipe, the discharge pipe is connected to the bottom end of the tank body, and the first outlet and the second outlet are both opened in the discharge pipe.

[0011] In one embodiment, the stirring device includes a controller, and valves are provided at the first outlet and the second outlet, and the valves and the first sensor are communicatively connected to the controller.

[0012] In one embodiment, a plurality of the first sensors are provided and are communicatively connected to the controller, and each of the first sensors is used to weigh the weight of the powder in the metering tank.

[0013] In one embodiment, the stirring mechanism includes a stirring tank having the inlet and the outlet that can be connected to the return pipe. The first sensor is connected to the stirring tank and is used to weigh the weight of the powder in the stirring tank.

[0014] In one embodiment, the stirring device includes a second sensor, which is connected to the storage mechanism and is used to weigh the powder in the storage mechanism.

[0015] In one embodiment, the storage mechanism includes a storage tank and a screw conveyor that are interconnected, the storage tank has the feed port, and the screw conveyor has the discharge port.

[0016] In one embodiment, the screw conveyor is disposed at the bottom end of the storage tank, and the conveying direction of the screw conveyor is horizontal.

[0017] A lithium battery production equipment comprises the above-mentioned stirring device.

[0018] In the above-mentioned stirring device and lithium battery production equipment, the powder is stored in the storage mechanism and can be quantitatively discharged through the discharge port of the storage mechanism, and then enter the stirring mechanism through the entrance of the stirring mechanism to complete the addition of the powder. The first sensor can weigh the weight of the powder entering the stirring mechanism through the entrance, so as to verify the weight and determine whether there is excess powder entering the stirring mechanism. In the return material assembly, the return material pipe is connected to the stirring mechanism, and the suction piece is connected to the feed port and the return material pipe. If the powder agglomerates, the first sensor weighs that there is excess powder entering the stirring mechanism, and the suction piece can be used to suck part of the powder in the stirring mechanism through the return material pipe to the feed port, so that part of the powder returns to the storage mechanism again. In this way, there is no need to manually scoop out excess powder, and the operation is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Schematic diagram of the structure of a stirring device in one embodiment of the present application.

[0020] Figure 2 Schematic diagram of the structure of a storage mechanism in one embodiment of the present application.

[0021] Figure 3 This is a schematic diagram of the structure of the metering tank in one embodiment of the present application.

[0022] Reference numerals:

[0023] 100, storage mechanism; 110, storage tank; 111, feed port; 120, screw conveyor; 121, discharge port; 200, stirring mechanism; 210, metering tank; 211, tank body; 2111, inlet; 212, discharge pipe; 2121, first outlet; 2122, second outlet; 213, first valve; 214, second valve; 220, stirring tank; 300, return material assembly; 310, return material pipe; 320, suction piece. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] See also Figures 1 to 3 , a stirring device provided in one embodiment of the present application includes a storage mechanism 100, a stirring mechanism 200, a return material assembly 300 and a first sensor. The storage mechanism 100 is used to store powder, and the storage mechanism 100 has a feed port 111 and a discharge port 121. The powder in the storage mechanism 100 can be quantitatively discharged through the discharge port 121. The stirring mechanism 200 has an inlet 2111 that can be connected to the discharge port 121. The first sensor is connected to the stirring mechanism 200, and the first sensor is used to weigh the weight of the powder entering the stirring mechanism 200 through the inlet 2111. The return material assembly 300 includes a return material pipe 310 and a suction piece 320, the return material pipe 310 is connected to the stirring mechanism 200, the suction piece 320 is connected to the feed port 111 and the return material pipe 310, and the suction piece 320 is used to suck the powder in the stirring mechanism 200 to the feed port 111 through the return material pipe 310.

[0031] In the above stirring device, the powder is stored in the storage mechanism 100 and can be quantitatively discharged through the discharge port 121 of the storage mechanism 100, and then enter the stirring mechanism 200 through the inlet 2111 of the stirring mechanism 200 to complete the addition of the powder. The first sensor can weigh the weight of the powder entering the stirring mechanism 200 through the inlet 2111, so as to perform a weight check and determine whether there is an excess of powder entering the stirring mechanism 200. In the return component 300, the return pipe 310 is connected to the stirring mechanism 200, and the suction piece 320 is connected to the feed port 111 and the return pipe 310. If the powder agglomerates, the first sensor weighs that there is an excess of powder entering the stirring mechanism 200, and the suction piece 320 can be used to suck part of the powder in the stirring mechanism 200 through the return pipe 310 to the feed port 111, so that part of the powder returns to the storage mechanism 100 again. In this way, there is no need to manually scoop out the excess powder, and the operation is more convenient and fast.

[0032] Specifically, the amount of powder material that needs to be quantitatively added to the stirring mechanism 200 is defined as the target weight, and the weight of the powder material entering the stirring mechanism 200 measured by the first sensor is the first weight. If the first weight is equal to the target weight, it means that there is no excess when the powder material is added to the stirring mechanism 200 through the storage mechanism 100, and there is no need to withdraw the powder material to the storage mechanism 100. If the first weight is greater than the target weight, it means that there is an excess when the powder material is added to the stirring mechanism 200 through the storage mechanism 100, and the weight of the excess powder material is the difference between the first weight and the target weight.

[0033] When part of the powder in the stirring mechanism 200 is sucked to the feed inlet 111 through the return pipe 310 by the suction member 320, the sucked amount may be equal to the difference between the first weight and the target weight. At this time, the excess powder can be just recovered to the storage mechanism 100.

[0034] Alternatively, the amount sucked by the suction piece 320 may also be greater than the difference between the first weight and the target weight. Then, after the recovery is completed, the amount of powder in the stirring mechanism 200 will be less than the target weight. At this time, it is necessary to open the discharge port 121 again to supplement the powder to the stirring mechanism 200. It should be noted that the reason why the first weight is greater than the target weight is mostly because the powder agglomerates, which affects the quantitative addition of the storage mechanism 100 to the stirring mechanism 200. Therefore, when the powder recovery is completed and the discharge port 121 is opened again for supplementary powder addition, the powder agglomerates are usually broken up, and excessive addition will not occur again.

[0035] See also Figures 1 to 3In some embodiments, the stirring mechanism 200 includes a metering tank 210 and a stirring tank 220, the metering tank 210 has an inlet 2111, the metering tank 210 also has a first outlet 2121 that can be connected to the stirring tank 220, and a second outlet 2122 that can be connected to the return pipe 310, the first sensor is connected to the metering tank 210, and is used to weigh the weight of the powder in the metering tank 210.

[0036] Specifically, the top of the metering tank 210 is its inlet 2111, and the inlet 2111 and the discharge port 121 of the storage mechanism 100 can be connected by a pipeline, and a valve can be set on the pipeline, and the inlet 2111 and the discharge port 121 are connected by opening and closing the valve. The first outlet 2121 of the metering tank 210 is also connected to the stirring tank 220 by a pipeline, and the pipeline is also provided with a valve to achieve the connection and disconnection between the two. The second outlet 2122 of the metering tank 210 and the return pipe 310 are also connected by a valve to achieve the connection and disconnection between the two. The powder stored in the storage mechanism 100 can be quantitatively added to the metering tank 210 through the discharge port 121 and the inlet 2111 in turn. The first sensor is a weighing sensor. When the weight of the powder in the metering tank 210 measured by the first sensor is equal to the target weight, it means that there is no over-addition. At this time, it is only necessary to open the valve between the first outlet 2121 and the mixing tank 220, and add the powder in the metering tank 210 to the mixing tank 220 for mixing. If the weight of the powder in the metering tank 210 measured is greater than the target weight, the valve between the second outlet 2122 and the return pipe 310 is opened, and part of the powder in the metering tank 210 is sucked back to the storage mechanism 100 through the suction member 320.

[0037] See also Figures 1 to 3 In some embodiments, the metering tank 210 includes a tank body 211 and a discharge pipe 212 , the discharge pipe 212 is connected to the bottom end of the tank body 211 , and the first outlet 2121 and the second outlet 2122 are both opened in the discharge pipe 212 .

[0038] Specifically, the top of the discharge pipe 212 is connected to the bottom of the tank body 211, the first outlet 2121 is opened at the bottom of the discharge pipe 212, and the second outlet 2122 is opened at the side wall of the discharge pipe 212. The discharge pipe 212 is arranged at the bottom of the tank body 211, so that the powder in the tank body 211 can be discharged more thoroughly and is not easy to remain in the tank body 211. Of course, in other embodiments, it is also possible if the discharge pipe 212 is connected to the side wall of the tank body 211.

[0039] See also Figures 1 to 3 In some embodiments, the stirring device includes a controller, and valves are provided at the first outlet 2121 and the second outlet 2122, and the valves and the first sensor are communicatively connected to the controller.

[0040] Specifically, a first valve 213 is provided at the first outlet 2121, and a second valve 214 is provided at the second outlet 2122. Both the first valve 213 and the second valve 214 are communicatively connected to the controller. When the weight measured by the first sensor is equal to the target weight, the controller controls the first valve 213 to open, and the powder in the metering tank 210 is added to the mixing tank 220. When the weight measured by the first sensor is greater than the target weight, the controller controls the second valve 214 to open, and part of the powder in the metering tank 210 is drawn back to the storage mechanism 100 through the suction member 320. Of course, in other embodiments, the controller may not be provided, and the value measured by the first sensor may be manually observed, and the first valve 213 or the second valve 214 may be manually opened.

[0041] See also Figures 1 to 3 In some embodiments, a plurality of first sensors are provided and are communicatively connected to the controller, and each first sensor is used to weigh the weight of the powder in the metering tank 210 .

[0042] Specifically, a plurality of first sensors may be provided to weigh the weight of the powder in the metering tank 210 at the same time, and an average value of the weighed weights may be taken to improve the accuracy of the weighing.

[0043] See also Figures 1 to 3 In some embodiments, the stirring mechanism 200 includes a stirring tank 220 having an inlet 2111 , and the stirring tank 220 also has an outlet that can be connected to the return pipe 310 . The first sensor is connected to the stirring tank 220 and is used to weigh the weight of the powder in the stirring tank 220 .

[0044] Specifically, this embodiment is equivalent to removing the metering tank 210 in the previous embodiment, and the powder stored in the storage mechanism 100 directly enters the stirring tank 220, and the weight of the powder in the stirring tank 220 is directly weighed by the first sensor. When the weight of the powder in the stirring tank 220 is exactly equal to the target weight, it means that there is no over-addition, and stirring can be performed directly. If the weight of the powder in the stirring tank 220 is greater than the target weight, it means that there is an over-addition problem when the stirring mechanism 200 performs quantitative addition, and part of the powder in the stirring tank 220 is sucked back to the storage mechanism 100 through the suction member 320.

[0045] See also Figures 1 to 3 In some embodiments, the stirring device includes a second sensor, which is connected to the storage mechanism 100 and is used to weigh the weight of the powder in the storage mechanism 100.

[0046] As mentioned above, the powder in the storage mechanism 100 can be quantitatively discharged through the discharge port 121 to add powder to the stirring mechanism 200 in a quantitative manner. Specifically, the weight of the remaining powder in the storage mechanism 100 is weighed by the second sensor, thereby indirectly obtaining the weight of the discharged powder to achieve quantitative addition. Specifically, the second sensor is a weighing sensor, and the initial weight of the powder in the storage mechanism 100 minus the target weight discharged is the remaining second weight. When the second sensor weighs the remaining weight of the powder in the storage mechanism 100 to be equal to the second weight, the discharge port 121 of the storage mechanism 100 is closed, and the addition of powder to the stirring mechanism 200 is stopped.

[0047] See also Figures 1 to 3 In some embodiments, the storage mechanism 100 includes a storage tank 110 and a screw conveyor 120 that are interconnected. The storage tank 110 has a feed port 111 , and the screw conveyor 120 has a discharge port 121 .

[0048] Specifically, the powder is stored in a storage tank 110, and the top of the storage tank 110 is a feed port 111 for the powder to enter. The powder in the storage tank 110 can enter the screw conveyor 120, and be spirally conveyed by the screw conveyor 120 to reach the discharge port 121. The structure of the screw conveyor 120 is prior art and will not be described here. When the powder is conveyed by the screw conveyor 120, the spiral conveying plate inside it must be rotated to continuously push the powder forward. The conveying plate can block and buffer the discharge of the powder, and control the speed of the powder discharge to prevent the powder from being completely discharged from the storage tank 110 and causing excessive addition. In this way, the accuracy of powder addition can be improved.

[0049] See also Figures 1 to 3 In some embodiments, the screw conveyor 120 is disposed at the bottom end of the storage tank 110, and the conveying direction of the screw conveyor 120 is horizontal.

[0050] Specifically, the screw conveyor 120 is arranged at the bottom of the storage tank 110, so that the powder in the storage tank 110 can be more thoroughly discharged into the screw conveyor 120 without causing residue. The conveying direction of the screw conveyor 120 is horizontal, which can prevent the powder from falling due to gravity and causing excessive addition, thereby further improving the accuracy of powder addition.

[0051] Of course, in other embodiments, the conveying direction of the screw conveyor 120 may be inclined relative to the horizontal direction.

[0052] See also Figures 1 to 3 In some embodiments, the lithium battery production equipment provided in one embodiment of the present application includes the stirring device in any one of the aforementioned embodiments.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A stirring device, characterized in that: The stirring device comprises: A storage mechanism, used for storing powder, the storage mechanism having a feed port and a discharge port, and the powder in the storage mechanism can be quantitatively discharged through the discharge port; A stirring mechanism having an inlet capable of communicating with the discharge port; a first sensor connected to the stirring mechanism, the first sensor being used to weigh the weight of the powder entering the stirring mechanism through the inlet; and The return material assembly includes a return material pipe and a suction piece, wherein the return material pipe is connected to the stirring mechanism, the suction piece is connected to the feed port and the return material pipe, and the suction piece is used to suck the powder in the stirring mechanism to the feed port through the return material pipe.

2. The stirring device according to claim 1, characterized in that: The stirring mechanism includes a metering tank and a stirring tank, the metering tank has the inlet, the metering tank also has a first outlet that can be connected to the stirring tank, and a second outlet that can be connected to the return pipe, the first sensor is connected to the metering tank, and is used to weigh the weight of the powder in the metering tank.

3. The stirring device according to claim 2, characterized in that: The metering tank includes a tank body and a discharge pipe, wherein the discharge pipe is connected to the bottom end of the tank body, and the first outlet and the second outlet are both opened in the discharge pipe.

4. The stirring device according to claim 2, characterized in that: The stirring device includes a controller. The first outlet and the second outlet are both provided with valves. The valves and the first sensor are both communicatively connected to the controller.

5. The stirring device according to claim 4, characterized in that: There are a plurality of first sensors, all of which are communicatively connected to the controller, and each of the first sensors is used to weigh the weight of the powder in the metering tank.

6. The stirring device according to claim 1, characterized in that: The stirring mechanism comprises a stirring tank having the inlet and the outlet which can be connected to the return pipe. The first sensor is connected to the stirring tank and is used to weigh the weight of the powder in the stirring tank.

7. The stirring device according to any one of claims 1 to 6, characterized in that The stirring device comprises a second sensor, which is connected to the storage mechanism and is used to weigh the powder in the storage mechanism.

8. The stirring device according to any one of claims 1 to 6, characterized in that The storage mechanism comprises a storage tank and a screw conveyor which are interconnected, the storage tank has the feed port, and the screw conveyor has the discharge port.

9. The stirring device according to claim 8, characterized in that: The screw conveyor is arranged at the bottom end of the storage tank, and the conveying direction of the screw conveyor is horizontal.

10. A lithium battery production equipment, characterized in that: The lithium battery production equipment comprises the stirring device according to any one of claims 1 to 9.

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