Nitrogen closed conveying system for binder material special for battery cell

Abstract

The utility model relates to a battery cell dedicated binder material nitrogen closed conveying system, including preparation tank, material injection pipe and discharge pipe, material injection pipe is conducted and connected to preparation tank top surface, discharge pipe is conducted and connected to preparation tank side wall bottom, preparation tank bottom surface is conducted and connected with circulation pipe, and the circulation pipe is conducted and connected with the circulation pipe. The end of the circulating pipe is communicated and connected with the top surface of the preparation tank, a manual valve is arranged at the joint of the circulating pipe and the bottom of the preparation tank, a first pneumatic valve is arranged at the bottom of the manual valve, a diaphragm pump is arranged on one side of the first pneumatic valve, and an in-pipe pressure sensor is arranged on one side of the diaphragm pump. A second pneumatic valve is arranged on one side of the in-pipe pressure sensor, and a lifting cylinder is movably arranged on the surface of the joint of the discharging pipe and the top of the preparation tank. According to the utility model, low-energy-consumption automatic circulation can be realized, material pollution is prevented, and an on-line concentration detection instrument is arranged on the circulating pipeline, so that the solid content of raw materials can be detected on line in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of powder materials, in particular to a nitrogen closed conveying system for special adhesive materials for battery cores. Background Art

[0002] Lithium battery electrode slurry is a type of fluid, and fluids can usually be divided into Newtonian fluids and non-Newtonian fluids. Among them, non-Newtonian fluids can be divided into dilatant fluids, time-dependent non-Newtonian fluids, pseudoplastic fluids, and Bingham plastic fluids. Newtonian fluids refer to low-viscosity fluids that are very easy to deform after being subjected to force, and the shear stress is proportional to the deformation rate. The shear stress at any point is a linear function of the shear deformation rate.

[0003] According to patent search, publication number: CN215996414U discloses a lithium battery slurry stirring main machine, including an outer cylinder, a stirring inner cylinder and a stirring paddle, the stirring inner cylinder is rotatably mounted in the outer cylinder and can be driven to rotate, the stirring paddle is eccentrically arranged in the inner cylinder, the stirring paddle is rotatably mounted on the top of the outer cylinder and can be driven to rotate, and the stirring inner cylinder is arranged obliquely. In the utility model, the stirring paddle and the stirring inner cylinder rotate, and the stirring paddle revolves relative to the stirring inner cylinder, which greatly improves the stirring efficiency, and there is no dead angle during the stirring process, and the stirring inner cylinder rotates at a certain angle, so that the lithium battery slurry forms a staggered mixed material flow and a reverse mixed material flow with a very high speed difference when mixing, ensuring the uniformity of the lithium battery slurry and improving the slurry mixing effect.

[0004] The existing closed nitrogen conveying of binder materials has the problems of high energy consumption, difficulty in maintenance, high maintenance cost, and easy oil leakage of the stirring bearing leading to material contamination. Due to the friction between the blades and the slurry, there is a risk of metal particles being introduced into the slurry, and the material is at risk of contamination. In order to solve the above problems, this application proposes a closed nitrogen conveying system for binder materials dedicated to battery cells. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a closed nitrogen delivery system for special binder materials for battery cells, which can realize low-energy automatic circulation and prevent material pollution. At the same time, the circulation pipeline is equipped with an online concentration detection instrument, which can detect the solid content of the raw materials in real time online to solve the problems raised in the background technology.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the utility model provides a nitrogen closed delivery system for special adhesive materials for battery cells, comprising a preparation tank, a filling pipe and a discharge pipe, wherein the filling pipe is conductively connected to the top surface of the preparation tank, the discharge pipe is conductively connected to the bottom of the side wall of the preparation tank, the bottom surface of the preparation tank is conductively connected to a circulation pipe, and the end of the circulation pipe is conductively connected to the top surface of the preparation tank;

[0009] A manual valve is provided at the connection between the circulation pipe and the bottom of the preparation tank, a pneumatic valve No. 1 is provided at the bottom of the manual valve, a diaphragm pump is provided on one side of the pneumatic valve No. 1, a pressure sensor in the tube is provided on one side of the diaphragm pump, and a pneumatic valve No. 2 is provided on one side of the pressure sensor in the tube;

[0010] A lifting cylinder is movably provided on the surface of the connection between the discharge pipe and the top of the preparation tank, and the bottom of the lifting cylinder is movably plugged into the inner cavity of the preparation tank.

[0011] Preferably, an online concentration detector is provided on one side of the No. 2 pneumatic valve, and the online concentration detector is located on the vertical side of the circulation pipe.

[0012] Preferably, a sampling port is provided on one side of the online concentration detector, and a sampling valve is installed on the sampling port.

[0013] Preferably, high and low position magnetic flap level gauges are respectively installed on the top and bottom of the side wall of the preparation tank, and a tank pressure sensor is provided on one side of the high and low position magnetic flap level gauge.

[0014] Preferably, a lifting frame is installed on the top surface of the preparation tank, and a servo motor is installed on the top surface of the lifting frame.

[0015] Preferably, the power output end of the servo motor passes through the top cavity wall of the lifting frame, and the power output end of the servo motor is connected to the driving wire shaft through a coupling transmission.

[0016] Preferably, a lifting seat is slidably provided in the inner cavity of the lifting frame, the driving wire shaft is threadedly connected with the lifting seat, and the lifting frame is welded to the top of the lifting cylinder surface.

[0017] Preferably, a sealing ring is sleeved on the end surface of the circulation pipe, and the outer wall of the sealing ring abuts against the inner wall surface of the lifting cylinder.

[0018] The above technical solution of the utility model has the following beneficial technical effects:

[0019] 1. In the utility model, when the diaphragm pump is turned on, the slurry self-circulates along the circulation pipe loop, and the slurry is always kept in a flowing and mixed state. An in-pipe pressure sensor is installed at the rear end of the diaphragm pump to detect the circulation pipe pressure in real time. When the circulation pipe is under high pressure, the diaphragm pump is stopped, and the No. 1 pneumatic valve and the No. 2 pneumatic valve are closed. An online concentration detector is installed on the circulation pipe to detect the solid content of the raw material in real time online with a detection accuracy of ≤0.5%, confirming that there is no precipitation of the material. The sampling port and the sampling valve are matched to facilitate manual sampling and retesting, and confirm that the data of the online concentration detector is accurate.

[0020] 2. In the utility model, a servo motor drives the driving wire shaft, and the driving wire shaft pushes the lifting cylinder to move along the circulation pipe through the lifting seat under the action of the surface thread. The bottom of the lifting cylinder is inserted into the inner cavity of the preparation tank. By adjusting the insertion depth of the lifting cylinder, the discharge height of the lithium battery slurry can be adjusted, so that the lithium battery slurry can be mixed at different heights in the preparation tank, which can improve the mixing efficiency of the lithium battery slurry.

[0021] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0023] In the drawings of the specification:

[0024] Figure 1 This is a schematic diagram of the overall structure of a nitrogen closed delivery system for a special adhesive material for battery cells according to the utility model;

[0025] Figure 2 This is a schematic cross-sectional structure diagram of a nitrogen closed delivery system for a special adhesive material for battery cells according to the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of a lifting cylinder of a nitrogen closed conveying system for a special adhesive material for battery cells according to the utility model;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of a lifting cylinder connection of a nitrogen closed delivery system for a special adhesive material for a battery cell according to the utility model;

[0028] Figure 5The utility model is a schematic diagram of the lifting structure of a lifting cylinder of a nitrogen closed conveying system for a special adhesive material for battery cells.

[0029] The reference numerals in the above drawings are described as follows:

[0030] 1. Preparation tank; 2. Filling pipe; 3. Discharge pipe; 4. Circulation pipe; 5. Manual valve; 6. No. 1 pneumatic valve; 7. Diaphragm pump; 8. In-pipe pressure sensor; 9. No. 2 pneumatic valve; 10. Online concentration detector; 11. Sampling port; 12. Sampling valve; 13. High and low position magnetic flap level gauge; 14. Tank pressure sensor; 15. Lifting cylinder; 16. Sealing ring; 17. Lifting frame; 18. Servo motor; 19. Drive wire shaft; 20. Lifting seat. DETAILED DESCRIPTION

[0031] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0033] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, X and / or Y, which means: X exists, Y exists, and X and Y exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in a logical relationship of "or".

[0035] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0036] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0038] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] like Figure 1-5As shown, the utility model proposes a nitrogen closed conveying system for special adhesive materials for battery cells, comprising a preparation tank 1, a filling pipe 2 and a discharge pipe 3, wherein the filling pipe 2 is conductively connected to the top surface of the preparation tank 1, the discharge pipe 3 is conductively connected to the bottom of the side wall of the preparation tank 1, the bottom surface of the preparation tank 1 is conductively connected to a circulation pipe 4, and the end of the circulation pipe 4 is conductively connected to the top surface of the preparation tank 1;

[0041] A manual valve 5 is provided at the connection between the circulation pipe 4 and the bottom of the preparation tank 1, a pneumatic valve No. 1 is provided at the bottom of the manual valve 5, a diaphragm pump 7 is provided on one side of the pneumatic valve No. 1 6, an in-pipe pressure sensor 8 is provided on one side of the diaphragm pump 7, and a pneumatic valve No. 2 is provided on one side of the in-pipe pressure sensor 8.

[0042] It should be noted that the lithium battery slurry is injected into the preparation tank 1 through the injection pipe 2, and the manual valve 5 is in the open state. When the equipment is started, the PLC controls the opening of the pneumatic valve No. 1 6 and the pneumatic valve No. 2 9, and the circulation pipe 4 forms a smooth loop in the pipeline. Then the diaphragm pump 7 is controlled to start, and the slurry is self-circulated along the circulation pipe 4 loop, so that the slurry is always kept in a flowing and mixed state.

[0043] In this embodiment, if Figure 1 and Figure 2 As shown, an online concentration detector 10 is provided on one side of the No. 2 pneumatic valve 9 , and the online concentration detector 10 is located on the vertical side of the circulation pipe 4 .

[0044] It should be noted that the online concentration detector 10 detects the solid content of the raw material in real time online, with a detection accuracy of ≤0.5%, confirming that there is no precipitation of the material.

[0045] In this embodiment, if Figure 1 and Figure 2 As shown, a sampling port 11 is provided on one side of the online concentration detector 10 , and a sampling valve 12 is installed on the sampling port 11 .

[0046] It should be noted that the combination of the sampling port 11 and the sampling valve 12 facilitates manual sampling and retesting.

[0047] In this embodiment, if Figure 1 and Figure 2 As shown, high and low position magnetic flap level gauges 13 are respectively installed on the top and bottom of the side wall of the preparation tank 1, and a tank pressure sensor 14 is provided on one side of the high and low position magnetic flap level gauge 13.

[0048] It should be noted that the preparation tank 1 is equipped with a high and low position magnetic flap level gauge 13 to detect the liquid level of the material in real time. A tank pressure sensor 14 is installed at the bottom of the tank side wall to perform secondary foolproofing for the slurry height detection of the entire tank to prevent the liquid level from being too low or too high.

[0049] In this embodiment, if Figure 3 and Figure 4 As shown, a lifting cylinder 15 is movably provided on the surface of the connection between the discharge pipe 3 and the top of the preparation tank 1, and the bottom of the lifting cylinder 15 is movably inserted in the inner cavity of the preparation tank 1, and a lifting frame 17 is installed on the top surface of the preparation tank 1, and a servo motor 18 is installed on the top surface of the lifting frame 17. The power output end of the servo motor 18 passes through the top cavity wall of the lifting frame 17, and the power output end of the servo motor 18 is connected to the driving wire shaft 19 through a coupling transmission. A lifting seat 20 is slidably provided in the inner cavity of the lifting frame 17, and the driving wire shaft 19 is threadedly connected to the lifting seat 20, and the lifting frame 17 is welded to the top of the surface of the lifting cylinder 15.

[0050] It should be noted that the servo motor 18 drives the driving wire shaft 19, and the driving wire shaft 19 pushes the lifting cylinder 15 to move along the circulation pipe 4 through the lifting seat 20 under the action of the surface thread. The bottom of the lifting cylinder 15 is inserted into the inner cavity of the preparation tank 1. By adjusting the insertion depth of the lifting cylinder 15, the discharge height of the lithium battery slurry can be adjusted, so that the lithium battery slurry can be mixed at different heights in the preparation tank 1, which can improve the mixing efficiency of the lithium battery slurry.

[0051] In this embodiment, if Figure 3 As shown, a sealing ring 16 is sleeved on the end surface of the circulation pipe 4 , and the outer wall of the sealing ring 16 abuts against the inner wall surface of the lifting cylinder 15 .

[0052] It should be noted that the sealing ring 16 can ensure the sealing of the connection between the lifting cylinder 15 and the circulation pipe 4.

[0053] The working principle and use process of the utility model are as follows: the lithium battery slurry is injected into the preparation tank 1 through the injection pipe 2, and the manual valve 5 is in the open state. When the equipment is started, the PLC controls the No. 1 pneumatic valve 6 and the No. 2 pneumatic valve 9 to open, and the circulation pipe 4 forms a smooth loop in the pipeline. Then the diaphragm pump 7 is controlled to start, and the slurry is self-circulated along the circulation pipe 4 loop, and the slurry is always kept in a flowing and mixed state. An in-pipe pressure sensor 8 is installed at the rear end of the diaphragm pump 7 to detect the pressure of the circulation pipe 4 in real time. When the pressure in the circulation pipe 4 is high, the diaphragm pump 7 is stopped, and the No. 1 pneumatic valve 6 and the No. 2 pneumatic valve 9 are closed. An online concentration detector 10 is installed on the circulation pipe 4 to detect the solid content of the raw material in real time online, and the detection accuracy is ≤0.5%. It is confirmed that there is no precipitation of the material through the sampling port. 11 and the sampling valve 12 are matched to facilitate manual sampling and retesting, and confirm that the data of the online concentration detector 10 is accurate. The preparation tank 1 is equipped with a high and low position magnetic flap level gauge 13 to detect the liquid level of the material in real time. A tank pressure sensor 14 is installed at the bottom of the side wall of the tank body. A secondary anti-mistake is made for the slurry height detection of the entire tank body to prevent the liquid level from being too low or too high. The servo motor 18 drives the driving wire shaft 19. The driving wire shaft 19 pushes the lifting cylinder 15 along the circulation pipe 4 through the lifting seat 20 under the action of the surface thread. The bottom of the lifting cylinder 15 is inserted into the inner cavity of the preparation tank 1. By adjusting the insertion depth of the lifting cylinder 15, the discharge height of the lithium battery slurry can be adjusted, so that the lithium battery slurry is mixed at different heights in the preparation tank 1, which can improve the mixing efficiency of the lithium battery slurry.

[0054] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A nitrogen closed delivery system for a special adhesive material for a battery cell, comprising a preparation tank (1), an injection pipe (2) and a discharge pipe (3), wherein the injection pipe (2) is conductively connected to the top surface of the preparation tank (1), and the discharge pipe (3) is conductively connected to the bottom of the side wall of the preparation tank (1), characterized in that: The bottom surface of the preparation tank (1) is conductively connected to a circulation pipe (4), and the end of the circulation pipe (4) is conductively connected to the top surface of the preparation tank (1); A manual valve (5) is provided at the connection between the circulation pipe (4) and the bottom of the preparation tank (1), a pneumatic valve No. 1 (6) is provided at the bottom of the manual valve (5), a diaphragm pump (7) is provided on one side of the pneumatic valve No. 1 (6), an in-pipe pressure sensor (8) is provided on one side of the diaphragm pump (7), and a pneumatic valve No. 2 (9) is provided on one side of the in-pipe pressure sensor (8); A lifting cylinder (15) is movably provided on the surface of the connection between the discharge pipe (3) and the top of the preparation tank (1), and the bottom of the lifting cylinder (15) is movably inserted into the inner cavity of the preparation tank (1).

2. A nitrogen closed delivery system for battery-specific binder materials according to claim 1, characterized in that: An online concentration detector (10) is provided on one side of the No. 2 pneumatic valve (9), and the online concentration detector (10) is located on the vertical side of the circulation pipe (4).

3. A nitrogen closed delivery system for battery-specific binder materials according to claim 2, characterized in that: A sampling port (11) is provided on one side of the online concentration detector (10), and a sampling valve (12) is installed on the sampling port (11).

4. The closed nitrogen delivery system for battery-specific binder materials according to claim 1, characterized in that: The top and bottom of the side wall of the preparation tank (1) are respectively provided with high and low position magnetic flap level gauges (13), and a tank body pressure sensor (14) is provided on one side of the high and low position magnetic flap level gauge (13).

5. The closed nitrogen delivery system for battery-specific binder materials according to claim 1, characterized in that: A lifting frame (17) is installed on the top surface of the preparation tank (1), and a servo motor (18) is installed on the top surface of the lifting frame (17).

6. A nitrogen closed delivery system for battery-specific binder materials according to claim 5, characterized in that: The power output end of the servo motor (18) passes through the top cavity wall of the lifting frame (17), and the power output end of the servo motor (18) is connected to the driving wire shaft (19) through a coupling transmission.

7. A nitrogen closed delivery system for battery-specific binder materials according to claim 6, characterized in that: A lifting seat (20) is slidably disposed in the inner cavity of the lifting frame (17), the driving wire shaft (19) is threadedly connected to the lifting seat (20), and the lifting frame (17) is welded to the top of the surface of the lifting cylinder (15).

8. A nitrogen closed delivery system for battery-specific adhesive materials according to claim 7, characterized in that: A sealing ring (16) is sleeved on the end surface of the circulation pipe (4), and the outer wall of the sealing ring (16) abuts against the inner wall surface of the lifting cylinder (15).

Images