Mixing device and battery slurry production equipment

Abstract

The embodiment of the utility model provides a material mixing device and battery slurry production equipment. The mixing device comprises a first storage container, a second storage container, a stirring mechanism and a first air supply mechanism. The first material storage container is provided with a material storage cavity, and a first gas phase inlet, a first discharge port and a first discharge port which are communicated with the material storage cavity; the second storage container is provided with a containing cavity and a second discharging port communicated with the containing cavity. The stirring mechanism is provided with a stirring cavity, a first feeding port, a second feeding port and a third discharging port, the first feeding port, the second feeding port and the third discharging port are communicated with the stirring cavity, the first feeding port is communicated with the first discharging port, and the second feeding port is communicated with the second discharging port. The first gas supply mechanism communicates with the first gas phase inlet and is configured to be capable of inputting inert gas into the material storage cavity. The problem of explosion risk in the mixing process can be improved.

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing equipment, and more specifically, to a mixing device and a battery slurry production equipment. Background Art

[0002] Regarding the preparation of battery slurry, usually, powder materials and solvents or glue liquids are respectively transported to a mixer for stirring to obtain a mixed slurry. However, when a solvent or glue liquid with flammable properties encounters dust, it is easy to combine to produce a gas-solid two-phase "mixture" with a higher explosion risk. Once encountering oxygen and an ignition source, there may be an explosion risk.

[0003] Therefore, how to improve the explosion risk problem existing in the mixing process has become an urgent problem to be solved. Summary of the Utility Model

[0004] In view of the above problems, this application provides a mixing device and a battery slurry production equipment, which are beneficial to improving the explosion risk problem existing in the mixing process.

[0005] In a first aspect, this application provides a mixing device, including: a first storage container having a storage cavity, a first gas phase inlet, a first discharge port, and a first discharge outlet communicating with the storage cavity; a second storage container having a loading cavity and a second discharge outlet communicating with the loading cavity; a stirring mechanism having a stirring cavity, a first feed inlet, a second feed inlet, and a third discharge outlet communicating with the stirring cavity, the first feed inlet communicating with the first discharge outlet, the second feed inlet communicating with the second discharge outlet, the first storage container being configured to input powder materials into the stirring cavity, the second storage container being configured to input solvents into the stirring cavity, the stirring mechanism being configured to stir the powder materials and solvents located in the stirring cavity to form a mixed slurry; a first gas supply mechanism communicating with the first gas phase inlet and being configured to be able to input inert gas into the storage cavity.

[0006] In some embodiments of the first aspect, when the first storage container inputs powder materials into the stirring cavity, the steam formed by the solvent in the stirring cavity is likely to enter the storage cavity to combine with dust to produce a gas-solid two-phase "mixture" with a higher explosion risk. Therefore, by providing a first gas supply mechanism communicating with the storage cavity, the first gas supply mechanism can input inert gas into the storage cavity to discharge the dust, air, and accumulated steam initially present in the storage cavity from the first discharge port, so that an inert gas replacement is realized in the storage cavity. After the replacement, the storage cavity does not have gases with a flammability risk, and moreover, when the first storage container after the inert gas replacement inputs powder materials into the stirring cavity, it will not carry flammable gases, which is beneficial to improving the explosion risk problem existing in the mixing process.

[0007] In some embodiments, the first storage container includes a feeding bin and a buffer bin. The storage cavity includes a feeding cavity disposed in the feeding bin and a buffer cavity disposed in the buffer bin. The buffer bin is connected between the feeding bin and the first feed inlet and has a first discharge port communicating with the buffer cavity. The feeding bin is configured to input powder into the buffer cavity, and the buffer bin is configured to input powder into the mixing cavity. The first gas inlet includes a first air inlet communicating with the buffer cavity. The first discharge port includes a first sub-discharge port communicating with the buffer cavity. The first air inlet is connected to the first gas supply mechanism.

[0008] In the above technical solution, an operator can put powder into the feeding bin. The powder in the storage cavity can enter the mixing cavity via the buffer bin. By replacing the inert gas in the buffer cavity, when the powder enters the mixing cavity, the steam in the mixing cavity can be prevented from directly floating into the storage cavity to cause an explosion risk, which is beneficial to further improving the explosion risk problem existing in the mixing process.

[0009] In some embodiments, in the height direction of the mixing mechanism, the height position of the feeding cavity is higher than that of the buffer cavity, and the height position of the buffer cavity is higher than that of the mixing cavity. By setting in this way, the layout is reasonable and it is convenient for the powder in the feeding cavity to enter the mixing cavity via the buffer cavity.

[0010] In some embodiments, the mixing device further includes a first switch member. The first switch member is disposed on the pipeline between the feeding bin and the buffer bin and is used to control the opening and closing of the pipeline. The first switch member can control whether the powder in the feeding bin can enter the buffer bin, which is beneficial to improving the flexibility of use of the mixing device.

[0011] In some embodiments, the first gas inlet further includes a second air inlet communicating with the feeding cavity. The first discharge port further includes a second sub-discharge port communicating with the feeding cavity. The second air inlet is connected to the first gas supply mechanism. The first gas supply mechanism is further configured to be able to input inert gas into the feeding cavity. By setting in this way, inert gas replacement can also be carried out in the feeding cavity, which can further improve the explosion risk problem existing in the mixing process.

[0012] In some embodiments, the feeding bin further has a third gas inlet communicating with the feeding cavity. The mixing device further includes a second gas supply mechanism. The second gas supply mechanism is connected to the third gas inlet and is configured to be able to input either air or oxygen into the feeding cavity.

[0013] In the above technical solution, by providing the second gas supply mechanism to input air or oxygen into the feeding cavity, the air or oxygen can be discharged to the operation space through the second sub-discharge port, so as to prevent the oxygen concentration in the air of the operation space from decreasing due to the leakage of inert gas during the inert gas replacement of the feeding cavity, which is beneficial to ensuring the safety of the operator.

[0014] In some embodiments, the stirring mechanism further has a second gas phase inlet and a second discharge port that communicate with the stirring chamber. The second gas phase inlet communicates with the first gas supply mechanism, and the first gas supply mechanism is further configured to be able to input an inert gas into the stirring chamber.

[0015] In the above technical solution, the first gas supply mechanism can also input an inert gas into the stirring chamber to perform an inert gas replacement on the stirring chamber. After the replacement, the stirring chamber does not have gases with a flammability risk. When the powder in the first storage container and the liquid in the second storage container enter the stirring mechanism for stirring and mixing, no explosion will occur, which is beneficial to improving the explosion risk problem existing in the mixing process.

[0016] In some embodiments, in the height direction of the stirring mechanism, both the second gas phase inlet and the second discharge port are provided at the top of the stirring mechanism. By setting in this way, an inert gas with a predetermined pressure can be input into the stirring chamber through the second gas phase inlet to press out the stirred mixed slurry from the third discharge port.

[0017] In some embodiments, in the height direction of the first storage container, the first discharge port is provided at the top of the first storage container, and the height position of the first gas phase inlet is lower than the height position of the first discharge port. By setting in this way, a safer inert gas with a density greater than that of air can be selected for replacement to blow up the dust or gas initially present in the storage chamber and discharge it through the first discharge port at the top.

[0018] In some embodiments, the second storage container further has a fourth gas phase inlet that communicates with the loading chamber. The fourth gas phase inlet communicates with the first gas supply mechanism, and the first gas supply mechanism is further configured to be able to input an inert gas into the loading chamber to drive the solvent in the loading chamber to enter the stirring chamber through the second discharge port. By setting in this way, the structure can be simplified, and the reliability can also be improved.

[0019] In some embodiments, the mixing device further includes a second switch member that is disposed on the pipeline between the first gas supply mechanism and the fourth gas phase inlet and is used to control the opening and closing of the pipeline; and / or, the mixing device further includes a first check valve that is disposed between the first gas supply mechanism and the fourth gas phase inlet.

[0020] In the above technical solution, the second switch member can control whether the inert gas of the first gas supply mechanism can enter the loading chamber, which is beneficial to improving the use flexibility of the mixing device; the first check valve can prevent the inert gas from flowing back to prevent safety accidents.

[0021] In some embodiments, the mixing device further includes a power mechanism, which is connected to the second storage container and is configured to drive the solvent in the loading cavity to enter the mixing cavity through the second discharge port. By providing the power mechanism, it is beneficial to ensure the effectiveness of the substances in the loading cavity entering the mixing cavity.

[0022] In some embodiments, the mixing device further includes an oxygen detector, which is configured to detect the concentration of oxygen. An oxygen detector is provided in the storage cavity. By providing the oxygen detector, the concentration of oxygen in the storage cavity can be detected to obtain whether the replacement of the inert gas is completed, avoiding waste of the inert gas, being beneficial to improving accuracy, and also being beneficial to cost savings.

[0023] In some embodiments, the mixing device further includes an oxygen detector, which is configured to detect the concentration of oxygen. An oxygen detector is provided on the side of the first storage container facing away from the storage cavity, and / or an oxygen detector is provided on the side of the second storage container facing away from the loading cavity, and / or an oxygen detector is provided on the side of the mixing mechanism facing away from the mixing cavity. By setting it in this way, the concentration of oxygen in the air of the operating space can be detected, and adjustments can be made in a timely manner according to the detection results to avoid insufficient oxygen content to ensure the safety of the operator.

[0024] In some embodiments, the mixing device further includes a third switching member. A third switching member is provided on the pipeline between the first gas supply mechanism and the first gas phase inlet, and the third switching member is used to control the opening and closing of the pipeline; and / or a third switching member is provided on the pipeline between the first discharge port and the first feed port, and the third switching member is used to control the opening and closing of the pipeline; and / or a third switching member is provided on the pipeline between the second discharge port and the second feed port, and the third switching member is used to control the opening and closing of the pipeline; and / or the mixing device further includes a second check valve, and a second check valve is provided between the first gas supply mechanism and the first gas phase inlet.

[0025] In the above technical solution, it is beneficial to control whether the inert gas of the first gas supply mechanism can enter the storage cavity, and also to control whether the powder in the storage cavity can enter the mixing cavity, and to control whether the well-mixed slurry in the mixing cavity flows out, which is beneficial to improving the flexibility of use of the mixing device; the second check valve can prevent the backflow of the inert gas to prevent safety accidents.

[0026] In some embodiments, the mixing device further includes an explosion-proof dust collector and a negative pressure device connected in communication. The first discharge port is connected to the explosion-proof dust collector, and the negative pressure device is configured to provide a suction force for the gas or dust in the storage cavity to enter the explosion-proof dust collector. By setting it in this way, environmental pollution can be avoided.

[0027] In some embodiments, the mixing device further includes a fourth switching member, and a fourth switching member is provided in the pipeline between the explosion-proof dust collector and the first discharge port, and the fourth switching member is used to control the opening and closing of the pipeline; and / or, the mixing device further includes a third check valve, and a third check valve is provided between the explosion-proof dust collector and the first discharge port. By setting in the above manner, it is beneficial to improve the use flexibility and can also prevent safety accidents.

[0028] In a second aspect, the present application provides a battery slurry production device, including the mixing device provided according to any one of the embodiments of the first aspect.

[0029] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0031] Figure 1 Schematic connection diagram of the mixing device provided by some embodiments of the present application;

[0032] Figure 2 Schematic connection diagram of the mixing device provided by some other embodiments of the present application;

[0033] Figure 3 Schematic connection diagram of the mixing device provided by some other embodiments of the present application;

[0034] Figure 4 Schematic connection diagram of the mixing device provided by some other embodiments of the present application;

[0035] Figure 5 Schematic connection diagram of the mixing device provided by some other embodiments of the present application.

[0036] The reference numerals in the specific embodiments are as follows:

[0037] 10. First storage container; 11. Storage chamber; 12. First gas phase inlet; 13. First discharge port; 14. First discharge outlet;

[0038] 101. Feeding bin; 111. Feeding chamber; 122. Second air inlet; 132. Second sub-discharge port; 1011. Third gas phase inlet;

[0039] 102. Buffer bin; 112. Buffer chamber; 121. First air inlet; 131. First sub-discharge port;

[0040] 20. Second storage container; 21. Loading chamber; 22. Second discharge port; 23. Fourth gas phase inlet;

[0041] 30. Stirring mechanism; 31. Stirring chamber; 32. Second gas phase inlet; 33. Second discharge port; 34. First feed inlet; 35. Second feed inlet; 36. Third discharge port;

[0042] 41. First gas supply mechanism; 42. Second gas supply mechanism;

[0043] 51. First switching member; 52. Second switching member; 53. Third switching member; 54. Fourth switching member; 55. First check valve; 56. Second check valve; 57. Third check valve;

[0044] 60. Power mechanism; 70. Oxygen detector;

[0045] 81. Explosion-proof dust collector; 82. Vacuum pump. Detailed implementation manners

[0046] For the purposes of making the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0048] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0049] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] The term "and / or" in the present application is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and back associated objects.

[0051] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed descriptions of the same components are omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present application.

[0052] The term "a plurality of" appearing in the present application refers to two or more (including two).

[0053] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as aerospace. With the continuous expansion of the application fields of battery devices, the market demand for them is also continuously increasing.

[0054] A battery device generally includes battery cells, and each battery cell includes electrode plates and a separator. Among them, the electrode plates include an anode electrode plate and a cathode electrode plate. Both the anode electrode plate and the cathode electrode plate include current collectors and coating layers. The active material of the anode electrode plate is coated on the current collector of the anode electrode plate to form a coating layer, and the active material of the cathode electrode plate is coated on the current collector of the cathode electrode plate to form a coating layer. The separator is disposed between the anode electrode plate and the cathode electrode plate and is used to separate the coating layer of the anode electrode plate and the coating layer of the cathode electrode plate. The anode electrode plate, the separator, and the cathode electrode plate are stacked and wound in sequence to form a battery cell.

[0055] In the production process of the battery device, the slurry is formed in the stirring process and then coated through the coating process. In the process of preparing the electrode plate, a coating device can be used to coat the slurry on the current collector of the electrode plate to form a coating layer.

[0056] Regarding the preparation of battery slurry, usually, powder materials and solvents or sizing agents are transported to a blender separately for stirring to obtain a mixed slurry. However, when solvents or sizing agents with flammable properties encounter dust, they are likely to combine to produce a gas-solid two-phase "mixture" with a higher explosion risk. Once exposed to oxygen and an ignition source, there may be an explosion risk. Therefore, how to improve the explosion risk problem existing in the mixing process has become an urgent problem to be solved.

[0057] Based on the above technical problems, an embodiment of the present application provides a mixing device, which includes a first storage container, a second storage container, a stirring mechanism, and a first gas supply mechanism. The first storage container has a storage cavity, a first gas phase inlet, a first discharge port, and a first discharge outlet that communicate with the storage cavity. The second storage container has a loading cavity and a second discharge outlet that communicates with the loading cavity. The stirring mechanism has a stirring cavity, a first feed inlet, a second feed inlet, and a third discharge outlet that communicate with the stirring cavity. The first feed inlet is communicated with the first discharge outlet, and the second feed inlet is communicated with the second discharge outlet. The first gas supply mechanism is communicated with the first gas phase inlet and is configured to be able to input an inert gas into the storage cavity.

[0058] By providing a first gas supply mechanism communicated with the storage cavity, the first gas supply mechanism can input an inert gas into the storage cavity to discharge the dust, air, and accumulated steam initially present in the storage cavity from the first discharge port, so that an inert gas replacement is realized in the storage cavity. After the replacement, the storage cavity does not have gases with a flammability risk. Moreover, when the first storage container after the inert gas replacement inputs powder materials into the stirring cavity, it will not carry flammable gases, which is conducive to improving the explosion risk problem existing in the mixing process.

[0059] Please refer to Figure 1 , an embodiment of the present application provides a mixing device, which includes a first storage container 10, a second storage container 20, a stirring mechanism 30, and a first gas supply mechanism 41. The first storage container 10 has a storage cavity 11, a first gas phase inlet 12, a first discharge port 13, and a first discharge outlet 14 that communicate with the storage cavity 11. The second storage container 20 has a loading cavity 21 and a second discharge outlet 22 that communicates with the loading cavity 21. The stirring mechanism 30 has a stirring cavity 31, a first feed inlet 34, a second feed inlet 35, and a third discharge outlet 36 that communicate with the stirring cavity 31. The first feed inlet 34 is communicated with the first discharge outlet 14, and the second feed inlet 35 is communicated with the second discharge outlet 22. The first storage container 10 is configured to input powder materials into the stirring cavity 31, the second storage container 20 is configured to input a solvent into the stirring cavity 31, and the stirring mechanism 30 is configured to stir the powder materials and the solvent located in the stirring cavity 31 to form a mixed slurry. The first gas supply mechanism 41 is communicated with the first gas phase inlet 12 and is configured to be able to input an inert gas into the storage cavity 11.

[0060] The first storage container 10 is a container with a certain accommodation space for accommodating powder materials, which can be a tank, a barrel, etc. The storage cavity 11 can be filled with powder materials for preparing battery slurry, or powder materials for preparing other slurries. The powder materials can be but are not limited to: carboxymethyl cellulose powder (CMC, Carboxymethyl Cellulose), low-density polyethylene powder (LDPE, Low-density polyethylene), polymethyl methacrylate powder (PMMA), etc.

[0061] The second storage container 20 is a container with a certain accommodation space for accommodating solvents, which can be a tank, a barrel, etc. The loading cavity 21 can be filled with solvents for preparing battery slurry, or solvents for preparing other slurries. The solvents can be but are not limited to N-methylpyrrolidone (NMP).

[0062] The first storage container 10 is used to input powder materials into the stirring cavity 31, and the second storage container 20 is used to input solvents into the stirring cavity 31. The stirring mechanism 30 is used to stir the powder materials and solvents located in the stirring cavity 31 to form a mixed slurry. Stirring paddles, stirring rods, etc. can be arranged in the stirring cavity 31.

[0063] The first gas supply mechanism 41 can input inert gas into the storage cavity 11 to discharge the dust and / or gas initially present in the storage cavity 11, so that the storage cavity 11 is filled with inert gas. Among them, the inert gas can include but is not limited to nitrogen, argon, helium, etc.

[0064] In the embodiment of the present application, the first discharge port 14 and the first feed port 34 can be connected through a pipeline, the second discharge port 22 and the second feed port 35 can be connected through a pipeline, and the first gas supply mechanism 41 and the first gas phase inlet 12 can be connected through a pipeline.

[0065] When the battery slurry is prepared using powder materials with explosion risk and solvents with low flash points, there is an explosion risk in the mixing device in the related art during the preparation. Specifically, there may be air inside the first storage container for inputting powder materials into the stirring mechanism. When there is solvent in the stirring cavity, the vapor formed above the solvent may float into the storage cavity to combine with the dust to generate a gas-solid two-phase "mixture" with a higher explosion risk. The gas-solid two-phase "mixture" may have an explosion risk when encountering oxygen in the air.

[0066] Therefore, before feeding the first storage container 10, the first gas supply mechanism 41 is controlled to input inert gas into the storage chamber 11. Specifically, the inert gas enters the storage chamber 11 from the first gas phase inlet 12. The dust, air, and accumulated steam in the storage chamber 11 are squeezed by the continuously input inert gas to the first discharge port 13 and discharged from the first discharge port 13, so that the inert gas replacement is realized in the storage chamber 11. When the inert gas replacement in the storage chamber 11 is completed, the first gas supply mechanism 41 stops supplying gas to the storage chamber 11.

[0067] Control the powder in the storage chamber 11 to enter the mixing chamber 31 through the first discharge port 14 and the first feed port 34 in sequence, control the solvent in the loading chamber 21 to enter the mixing chamber 31 through the second discharge port 22 and the second feed port 35 in sequence, start the mixing mechanism 30 to mix, and the mixed slurry formed by the powder and the solvent is discharged from the third discharge port 36. The storage chamber 11 is filled with inert gas with stable chemical properties and does not have flammable conditions.

[0068] In some embodiments of the present application, the mixing device provided is provided with a first gas supply mechanism 41 communicated with the first storage container 10. The first gas supply mechanism 41 can input inert gas into the storage chamber 11 to discharge the initially existing dust, gas, and accumulated steam in the storage chamber 11 and the mixing chamber 31, realize inert gas replacement. After replacement, the storage chamber 11 does not have gases with flammability risk. When the first storage container 10 after inert gas replacement inputs powder into the mixing chamber 31, it will not carry combustible gas and will not explode, which is beneficial to improving the explosion risk problem existing in the mixing process.

[0069] Exemplarily, nitrogen can be selected as the inert gas.

[0070] The first gas supply mechanism 41 has a gas supply port, and the gas supply port is communicated with the first gas phase inlet 12 so that the first gas supply mechanism 41 is communicated with the storage chamber 11.

[0071] Optionally, the first gas supply mechanism 41 can also be communicated with the mixing chamber 31 to input inert gas into the mixing chamber 31.

[0072] Optionally, the first gas supply mechanism 41 can also be communicated with the loading chamber 21 to input inert gas into the loading chamber 21.

[0073] Optionally, the first storage container 10 can be set as an integral structure. Of course, the first storage container 10 can also be set as a structure formed by combining two containers. Among them, the two containers can respectively have cavities to jointly form the storage chamber 11.

[0074] Please refer to Figure 2, in some alternative embodiments, the first storage container 10 includes a feeding bin 101 and a buffer bin 102. The storage cavity 11 includes a feeding cavity 111 provided in the feeding bin 101 and a buffer cavity 112 provided in the buffer bin 102. The buffer bin 102 is connected between the feeding bin 101 and the first feed port 34 and has a first discharge port 14 communicating with the buffer cavity 112. The feeding bin 101 is configured to input powder into the buffer cavity 112, and the buffer bin 102 is configured to input the powder into the mixing cavity 31. The first gas inlet 12 includes a first air inlet 121 communicating with the buffer cavity 112, and the first discharge port 13 includes a first sub-discharge port 131 communicating with the buffer cavity 112. The first air inlet 121 is connected to the first gas supply mechanism 41.

[0075] The feeding bin 101 refers to a container into which an operator puts the powder in the powder package into the feeding cavity 111. The feeding bin 101 can be a feeding tank or a feeding bucket.

[0076] The operator can directly put the unopened powder package into the feeding cavity 111, or can remove the powder package to put the powder into the feeding cavity 111.

[0077] It can be understood that the feeding bin 101 is usually provided with a cover plate or an interface communicating with the feeding cavity 111 so that the operator can feed from here. During the feeding process, external air may enter the storage cavity 11 together with the powder.

[0078] Therefore, in specific implementation, the buffer cavity 112 can be replaced with inert gas first, then the operator can put the powder into the feeding cavity 111, then introduce the powder in the feeding cavity 111 into the buffer cavity 112, and then introduce the powder in the buffer cavity 112 into the mixing cavity 31. By setting in this way, it can avoid the risk that when the powder enters the mixing cavity 31, the steam in the mixing cavity 31 directly floats to the feeding cavity 111 to encounter dust and air and explode, which is beneficial to further improving the explosion risk problem existing in the mixing process.

[0079] Specifically, the inert gas in the first gas supply mechanism 41 can enter the buffer cavity 112 through the first air inlet 121, and the dust, gas and accumulated steam in the buffer cavity 112 can be discharged through the first sub-discharge port 131.

[0080] In some alternative embodiments, in the height direction of the mixing mechanism 30, the height position of the feeding cavity 111 is higher than the height position of the buffer cavity 112, and the height position of the buffer cavity 112 is higher than the height position of the mixing cavity 31.

[0081] Among them, the height direction of the mixing mechanism 30 is the same as the height directions of the feeding bin 101 and the buffer bin 102.

[0082] The mixing device provided by some embodiments of the present application is arranged in the above manner, with a reasonable layout, facilitating the powder in the feeding chamber 111 to enter the stirring chamber 31 via the buffer chamber 112.

[0083] Optionally, the feeding bin 101, the buffer bin 102, and the stirring mechanism 30 can be vertically arranged in the height direction. Of course, the three of them can also be arranged along a direction inclined to the height direction.

[0084] Such as Figure 2 As shown, in some alternative embodiments, the mixing device further includes a first switching member 51. The first switching member 51 is disposed on the pipeline between the feeding bin 101 and the buffer bin 102 and is used to control the opening and closing of the pipeline.

[0085] The first switching member 51 can control whether the powder in the feeding bin 101 can enter the buffer bin 102, which is beneficial to improving the flexibility of use of the mixing device.

[0086] The first switching member 51 can be a valve, and the valve can include but is not limited to a pneumatic valve, an electric valve, etc.

[0087] The opening degree of the first switching member 51 can be adjusted. The larger the opening degree of the first switching member 51, the larger its flow rate; the smaller the opening degree of the first switching member 51, the smaller its flow rate.

[0088] Optionally, a valve communicating with the stirring chamber 31 can be provided at the bottom of the stirring mechanism 30 to control the discharge of the mixed slurry in the stirring chamber 31.

[0089] Please refer to Figure 3 , in some alternative embodiments, the first gas inlet 12 further includes a second air inlet 122 communicating with the feeding chamber 111, and the first discharge port 13 further includes a second sub-discharge port 132 communicating with the feeding chamber 111. The second air inlet 122 communicates with the first gas supply mechanism 41, and the first gas supply mechanism 41 is further configured to be able to input inert gas into the feeding chamber 111.

[0090] The first gas supply mechanism 41 can input inert gas into the storage chamber 11, so that the dust and / or gas initially present in the storage chamber 11 are discharged, and the storage chamber 11 is filled with inert gas.

[0091] Specifically, the inert gas can enter the feeding chamber 111 through the second air inlet 122, and the dust and gas in the feeding chamber 111 can be discharged through the second sub-discharge port 132.

[0092] The mixing device provided by some embodiments of the present application can perform inert gas replacement on both the feeding chamber 111 and the buffer chamber 112, which can further improve the explosion risk problem existing in the mixing process.

[0093] Please refer to Figure 4 , in some alternative embodiments, the feeding bin 101 further has a third gas phase inlet 1011 communicating with the feeding cavity 111, and the mixing device further includes a second gas supply mechanism 42. The second gas supply mechanism 42 is communicated with the third gas phase inlet 1011 and is configured to be capable of inputting either air or oxygen into the feeding cavity 111.

[0094] It can be understood that almost all of the gases present in the feeding cavity 111 after being replaced by inert gas are inert gases. When an operator opens the feeding bin 101 to feed the feeding cavity 111, there is a problem of inert gas leaking into the operation space. Moreover, since the feeding bin 101 is provided with a cover plate or an interface for feeding, if the cover plate or the interface is not tightly sealed, there will also be a problem of inert gas leaking into the operation space, resulting in a decrease in the oxygen concentration in the air in the operation space.

[0095] Therefore, by providing the second gas supply mechanism 42 to fill the feeding cavity 111 with air or oxygen, the air or oxygen can be discharged through the second sub-discharge port 132 into the operation space, so that the oxygen concentration in the air in the operation space can be maintained within the normal range.

[0096] The mixing device provided in some embodiments of the present application can avoid the decrease in the oxygen concentration in the air in the operation space due to the leakage of inert gas during the inert gas replacement of the feeding cavity 111, which is beneficial to ensuring the safety of the operator.

[0097] Please continue to refer to Figure 1 and Figure 2 , in some alternative embodiments, the stirring mechanism 30 further has a second gas phase inlet 32 and a second discharge port 33 communicating with the stirring cavity 31. The second gas phase inlet 32 is communicated with the first gas supply mechanism 41, and the first gas supply mechanism 41 is further configured to be capable of inputting inert gas into the stirring cavity 31.

[0098] The first gas supply mechanism 41 can also fill the stirring cavity 31 with inert gas, so that the dust, gas and steam initially present in the stirring cavity 31 are discharged, and the stirring cavity 31 is filled with inert gas.

[0099] It can be understood that after the stirring cavity 31 is replaced with inert gas, the gases present in the cavity are all chemically stable inert gases. Even if the solvent forms steam above the stirring cavity 31 and combines with the dust to produce a gas-solid two-phase "mixture" with a higher explosion risk, the stirring cavity 31 does not have flammable conditions and will not explode.

[0100] Therefore, by connecting the first gas supply mechanism 41 with the stirring mechanism 30, the stirring chamber 31 is purged with inert gas. After the replacement, the gas in the stirring chamber 31 does not pose a risk of flammability. When the powder in the first storage container 10 and the solvent in the second storage container 20 enter the stirring mechanism 30 for stirring and mixing, no explosion will occur, which helps to further improve the explosion risk problem existing in the mixing process.

[0101] The mixing device provided by some embodiments of the present application can purge the feeding chamber 111, the buffer chamber 112, and the stirring chamber 31 with inert gas, which can further improve the explosion risk problem existing in the mixing process.

[0102] In some alternative embodiments, in the height direction of the stirring mechanism 30, both the second gas phase inlet 32 and the second discharge port 33 are provided at the top of the stirring mechanism 30.

[0103] The stirring mechanism 30 can be equally divided into three parts along its height direction, which are the top, the middle, and the bottom in descending order of height.

[0104] As an example, the stirring mechanism 30 includes a top wall, a bottom wall opposite to each other in the height direction, and side walls connecting the top wall and the bottom wall. Both the second gas phase inlet 32 and the second discharge port 33 are provided on the top wall.

[0105] It can be understood that the mixed slurry completed in the stirring chamber 31 is usually at the bottom. When it is necessary to discharge the mixed slurry, the first gas supply mechanism 41 can be controlled to input inert gas with a predetermined pressure into the stirring chamber 31 through the second gas phase inlet 32, so as to press out the mixed slurry from the third discharge port 36.

[0106] Therefore, setting the second gas phase inlet 32 at the top of the stirring mechanism 30 facilitates the gas to enter the stirring chamber 31 to press out the mixed slurry and avoids interference between the gas and the mixed slurry.

[0107] Optionally, a pressure reducing valve can be provided upstream of the first gas supply mechanism 41 to ensure the effectiveness of the inert gas in the first gas supply mechanism 41 having a predetermined pressure.

[0108] Please continue to refer to Figure 1 , in some alternative embodiments, in the height direction of the first storage container 10, the first discharge port 13 is provided at the top of the first storage container 10, and the height position of the first gas phase inlet 12 is the height position of the first discharge port 13.

[0109] The first storage container 10 can be equally divided into three parts along its height direction. From high to low in the height direction, they are the top, the middle, and the bottom. The first discharge port 13 can be arranged at the top, and the first gas-phase inlet 12 can be arranged near the bottom and slightly higher than the material level in the storage cavity 11.

[0110] As an example, the first storage container 10 includes a top wall, a bottom wall opposite to each other along the height direction, and side walls connected between the top wall and the bottom wall. The first discharge port 13 can be arranged on the top wall, and the first gas-phase inlet 12 can be arranged on the side wall.

[0111] By setting in this way, an inert gas with a density greater than that of air can be selected. When the inert gas enters the storage cavity 11, due to its density being greater than the density of the air in the storage cavity 11, the inert gas can squeeze the dust or air to the upper position of the storage cavity 11. The air at the upper position can be discharged from the first discharge port 13. When all the air in the storage cavity 11 is emptied, almost all the inert gas exists in the storage cavity 11.

[0112] The mixing device provided by some embodiments of the present application is set in the above manner, which is beneficial to improving the replacement efficiency of the inert gas in the storage cavity 11, can also avoid the waste of the inert gas, is beneficial to cost saving, and moreover, a safer inert gas with a density greater than that of air can be selected for replacement. Optionally, the first air inlet 121 is arranged at the top of the buffer bin 102, and the first sub-discharge port 131 is arranged at the top of the buffer bin 102.

[0113] As Figure 3 shown, optionally, the second air inlet 122 is arranged near the bottom of the feeding bin 101 and slightly higher than the material level in the storage cavity 11, and the second sub-discharge port 132 is arranged at the top of the feeding bin 101.

[0114] Optionally, the first air inlet 121 is arranged near the bottom of the feeding bin 101 and slightly higher than the material level in the storage cavity 11, and the first sub-discharge port 131 is arranged at the top of the feeding bin 101.

[0115] Please refer to Figure 5 In some optional embodiments, the second storage container 20 further has a fourth gas-phase inlet 23 communicating with the loading cavity 21. The fourth gas-phase inlet 23 is communicated with the first gas supply mechanism 41. The first gas supply mechanism 41 is further configured to input an inert gas into the loading cavity 21 to drive the solvent in the loading cavity 21 to enter the stirring cavity 31 through the second discharge port 22.

[0116] The top of the second storage container 20 may be provided with a fourth gas-phase inlet 23. The first gas supply mechanism 41 may input inert gas with a predetermined pressure into the loading cavity 21 through the fourth gas-phase inlet 23, so as to press out the solvent from the second discharge port 22 and press it into the stirring cavity 31 through the second feed port 35, so that the loading cavity 21 and the pipeline connecting the loading cavity 21 and the stirring cavity 31 are filled with inert gas, which is beneficial to reducing the explosion risk.

[0117] It can be understood that the inert gas in the first gas supply mechanism 41 can be depressurized, and the inert gas with a predetermined pressure entering the loading cavity 21 can drive the solvent in the loading cavity 21 to be pressed out.

[0118] Optionally, a pressure reducing valve may be provided upstream of the first gas supply mechanism 41 to ensure the effectiveness of the inert gas in the first gas supply mechanism 41 having a predetermined pressure.

[0119] By setting in this way, the structure can be simplified, the first gas supply mechanism 41 can realize multiple functions, and it is also beneficial to improve the reliability.

[0120] In some alternative embodiments, the mixing device further includes a second switch member 52. The second switch member 52 is disposed on the pipeline between the first gas supply mechanism 41 and the fourth gas-phase inlet 23 and is used to control the opening and closing of the pipeline.

[0121] The second switch member 52 can open or close the connection between the first gas supply mechanism 41 and the loading cavity 21. The second switch member 52 may be a valve, and the valve may include but is not limited to a pneumatic valve, an electric valve, etc.

[0122] The opening degree of the second switch member 52 can be adjusted. The larger the opening degree of the second switch member 52, the greater its flow rate, and the smaller the opening degree of the second switch member 52, the smaller its flow rate.

[0123] In some alternative embodiments, the mixing device further includes a first check valve 55. The first check valve 55 is disposed between the first gas supply mechanism 41 and the fourth gas-phase inlet 23.

[0124] The first check valve 55 is used to prevent the gas or solvent in the loading cavity 21 from flowing back to the first gas supply mechanism 41 to prevent the first gas supply mechanism 41 from malfunctioning, thereby being beneficial to improving the reliability of the mixing device.

[0125] Exemplarily, the mixing device includes a second switch member 52 and a first check valve 55. The second switch member 52 is disposed between the first gas supply mechanism 41 and the first check valve 55, and the first check valve 55 is disposed between the second switch member 52 and the fourth gas-phase inlet 23.

[0126] Such as Figure 4As shown, in some alternative embodiments, the mixing device further includes a power mechanism 60. The power mechanism 60 is connected to the second storage container 20 and is configured to drive the solvent in the loading cavity 21 to enter the mixing cavity 31 through the second discharge port 22.

[0127] By providing the power mechanism 60, it is beneficial to ensure the effectiveness of the material in the loading cavity 21 entering the mixing cavity 31.

[0128] The power mechanism 60 is a machine that can increase the energy of the solvent to transport the solvent. It may include a pump body, and the pump body may include, but is not limited to, one of a positive displacement pump body and a vane pump body. Specifically, it may be an axial flow pump, a centrifugal pump, a mixed flow pump, etc.

[0129] As Figure 1 As shown, in some alternative embodiments, the mixing device further includes an oxygen detector 70. The oxygen detector 70 is configured to detect the concentration of oxygen, and an oxygen detector 70 is provided in the storage cavity 11.

[0130] By providing the oxygen detector 70, it is possible to detect the concentration of oxygen in the gas in the storage cavity 11 to obtain whether the replacement of the inert gas is completed, avoid waste of the inert gas, be beneficial to improving accuracy, and also be beneficial to cost savings.

[0131] As Figure 3 As shown, in some alternative embodiments, an oxygen detector 70 is provided in the mixing cavity 31, and oxygen detectors 70 are provided in both the feeding cavity 111 and the buffer cavity 112.

[0132] As an example, when the oxygen detector 70 detects that the oxygen concentration in the feeding cavity 111, the buffer cavity 112, and the mixing cavity 31 drops below 1%, the replacement of the three is completed.

[0133] As Figure 5 As shown, in some alternative embodiments, the mixing device further includes an oxygen detector 70. The oxygen detector 70 is configured to detect the concentration of oxygen, and an oxygen detector 70 is provided on the side of the first storage container 10 facing away from the storage cavity 11.

[0134] It can be understood that if the inert gas in the mixing device leaks to the outside, that is, into the operating space where the mixing device is placed, it will cause a decrease in the oxygen content in the operating space and affect the safety of the operator. Therefore, an oxygen detector 70 is provided on the side of the storage container facing away from the storage cavity 11. That is to say, an oxygen detector 70 is provided in the operating space, which can real-time monitor the oxygen concentration in the operating space, facilitate timely intervention and treatment, avoid insufficient oxygen content, and ensure the safety of the operator.

[0135] The oxygen monitor can be connected to the side of the first storage container 10 facing away from the storage cavity 11, or it can be arranged without being connected to the side of the first storage container 10 facing away from the storage cavity 11.

[0136] In some alternative embodiments, the oxygen detector is provided on the side of the second storage container 20 facing away from the loading cavity 21.

[0137] In some alternative embodiments, the oxygen detector 70 is provided on the side of the stirring mechanism 30 facing away from the stirring cavity 31.

[0138] The mixing device provided in some embodiments of the present application is arranged in the above manner, which is beneficial to ensuring the safety of the operator.

[0139] Optionally, for the mixing device provided in the embodiments of the present application, oxygen detectors are provided both inside and outside thereof.

[0140] As Figure 5 shown, in some alternative embodiments, the mixing device further includes a third switching member 53. A third switching member 53 is provided on the pipeline between the first gas supply mechanism 41 and the first gas phase inlet 12. The third switching member 53 is used to control the opening and closing of the pipeline.

[0141] The third switching member 53 between the first gas supply mechanism 41 and the first gas phase inlet 12 can control whether the inert gas in the first gas supply mechanism 41 can enter the storage cavity 11, which is beneficial to improving the use flexibility of the mixing device.

[0142] The third switching member 53 can be a valve, and the valve can include but is not limited to a pneumatic valve, an electric valve, etc.

[0143] The opening degree of the third switching member 53 can be adjusted. The larger the opening degree of the third switching member 53, the greater its flow rate; the smaller the opening degree of the third switching member 53, the smaller its flow rate.

[0144] Optionally, a third switching member 53 is provided on the pipeline between the first gas supply mechanism 41 and the first air inlet 121.

[0145] Optionally, a third switching member 53 is provided on the pipeline between the first gas supply mechanism 41 and the second air inlet 122.

[0146] In some alternative embodiments, a third switching member 53 is provided on the pipeline between the first gas supply mechanism 41 and the second gas phase inlet 32. The third switching member 53 is used to control the opening and closing of the pipeline.

[0147] The third switching member 53 between the first gas supply mechanism 41 and the second gas phase inlet 32 can control whether the inert gas in the first gas supply mechanism 41 can enter the stirring cavity 31.

[0148] In some alternative embodiments, a third switching member 53 is provided on the pipeline between the first discharge port 14 and the first feed port 34, and the third switching member 53 is used to control the opening and closing of the pipeline.

[0149] The third switching member 53 between the first discharge port 14 and the first feed port 34 can control whether the powder in the storage chamber 11 can enter the mixing chamber 31, which is beneficial to improving the flexibility of use of the mixing device.

[0150] In some alternative embodiments, a third switching member 53 is provided on the pipeline between the second discharge port 22 and the second feed port 35, and the third switching member 53 is used to control the opening and closing of the pipeline.

[0151] The third switching member 53 between the second discharge port 22 and the second feed port 35 can control whether the liquid in the receiving chamber 21 can enter the mixing chamber 31, which is beneficial to improving the flexibility of use of the mixing device.

[0152] In some alternative embodiments, the third switching member 53 is communicatively connected to the oxygen detector 70.

[0153] When the oxygen concentration detected by the oxygen detector 70 reaches a preset value, it indicates that the input inert gas has reached the set content. Then, the third switching member 53 closes the connection between the first gas supply mechanism 41 and the first gas inlet 121, the second gas inlet 122, and the second gas phase inlet 32.

[0154] The communication connection can be an electrical connection or a wireless connection.

[0155] In some alternative embodiments, the mixing device further includes a second check valve 56, and a second check valve 56 is provided between the first gas supply mechanism 41 and the first gas phase inlet 12.

[0156] The second check valve 56 between the first gas supply mechanism 41 and the first gas phase inlet 12 is used to prevent the dust or gas in the storage chamber 11 from flowing back to the first gas supply mechanism 41, so as to prevent the first gas supply mechanism 41 from malfunctioning, ensure the reliability of the inert gas replacement of the storage chamber 11, and thus be beneficial to improving the reliability of the mixing device.

[0157] Optionally, a second check valve 56 is provided between the first gas supply mechanism 41 and the first gas inlet 121.

[0158] Optionally, a second check valve 56 is provided between the first gas supply mechanism 41 and the second gas inlet 122.

[0159] In some alternative embodiments, a second check valve 56 is provided between the first gas supply mechanism 41 and the second gas phase inlet 32.

[0160] The second check valve 56 between the first air supply mechanism 41 and the second gas phase inlet 32 is used to prevent the dust or gas in the mixing chamber 31 from flowing back to the first air supply mechanism 41, so as to prevent the first air supply mechanism 41 from malfunctioning, ensure the reliability of the inert gas replacement of the mixing chamber 31, and thus facilitate improving the reliability of the mixing device.

[0161] Please refer to Figures 1 to 5 , in some alternative embodiments, the mixing device further includes an explosion-proof dust collector 81 and a negative pressure device 82 which are connected in communication. The first discharge port 13 is communicated with the explosion-proof dust collector 81, and the negative pressure device 82 is configured to provide a suction force for the gas or dust in the storage chamber 11 to enter the explosion-proof dust collector 81.

[0162] The explosion-proof dust collector 81 refers to a device that can filter and retain the dust in the air flow passing through itself, and can be but is not limited to a bag filter, a sedimentation dust collector, a cyclone dust collector, a wet dust collector, etc.

[0163] The negative pressure device 82 is used to generate negative pressure to enable the gas or dust in the storage chamber 11 to enter the explosion-proof dust collector 81, and it can be but is not limited to a suction fan.

[0164] The explosion-proof dust collector 81 is connected between the first discharge port 13 and the negative pressure device 82. Specifically, the explosion-proof dust collector 81 is connected between the first sub-discharge port 131, the second sub-discharge port 132 and the negative pressure device 82.

[0165] When the negative pressure device 82 operates, the gas in the storage chamber 11 flows towards the explosion-proof dust collector 81 under the suction force of the negative pressure device 82, and the dust can be retained in the explosion-proof dust collector 81 under the dust removal effect of the explosion-proof dust collector 81, avoiding dust spillage and environmental pollution.

[0166] In some alternative embodiments, the second discharge port 33 is communicated with the explosion-proof dust collector 81, and the negative pressure device 82 is configured to provide a suction force for the gas or dust in the mixing chamber 31 to enter the explosion-proof dust collector 81.

[0167] As an example, the explosion-proof dust collector 81 is connected between the first sub-discharge port 131, the second sub-discharge port 132, the second discharge port 33 and the negative pressure device 82.

[0168] In some alternative embodiments, the mixing device further includes an exhaust gas treatment mechanism, and the negative pressure device 82 is connected between the explosion-proof dust collector 81 and the exhaust gas treatment mechanism.

[0169] In some alternative embodiments, the mixing device further includes a fourth switching member 54. A fourth switching member 54 is provided on the pipeline between the explosion-proof dust collector 81 and the first discharge port 13, and the fourth switching member 54 is used to control the opening and closing of the pipeline.

[0170] The fourth switching member 54 between the explosion-proof dust collector 81 and the first discharge port 13 can open or close the connection between the explosion-proof dust collector 81 and the storage chamber 11. The fourth switching member 54 can be a valve, and the valve can include but is not limited to a pneumatic valve, an electric valve, etc.

[0171] The opening degree of the fourth switching member 54 can be adjusted. The larger the opening degree of the fourth switching member 54, the greater its flow rate; the smaller the opening degree of the fourth switching member 54, the smaller its flow rate.

[0172] In some alternative embodiments, a fourth switching member 54 is provided on the pipeline between the explosion-proof dust collector 81 and the second discharge port 33.

[0173] The fourth switching member 54 between the explosion-proof dust collector 81 and the second discharge port 33 can open or close the connection between the explosion-proof dust collector 81 and the mixing chamber 31.

[0174] In some alternative embodiments, the mixing device further includes a third check valve 57, and a third check valve 57 is provided between the explosion-proof dust collector 81 and the first discharge port 13.

[0175] The third check valve 57 between the explosion-proof dust collector 81 and the first discharge port 13 is used to prevent dust or gas in the explosion-proof dust collector 81 from flowing back to the storage chamber 11, so as to ensure the reliability of the inert gas replacement of the storage chamber 11, thereby facilitating the improvement of the reliability of the mixing device.

[0176] In some alternative embodiments, a third check valve 57 is provided between the explosion-proof dust collector 81 and the second discharge port 33.

[0177] The third check valve 57 between the explosion-proof dust collector 81 and the second discharge port 33 is used to prevent dust or gas in the explosion-proof dust collector 81 from flowing back to the mixing chamber 31, so as to ensure the reliability of the inert gas replacement of the mixing chamber 31, thereby facilitating the improvement of the reliability of the mixing device.

[0178] Optionally, the storage chamber 11, the mixing chamber 31 and the explosion-proof dust collector 81 can be connected through separate exhaust pipes, or they can share the same exhaust pipe.

[0179] Exemplarily, the exhaust pipe includes a main pipe and sub-pipes. The storage chamber 11 is connected to the main pipe through one of the sub-pipes, the mixing chamber 31 is connected to the main pipe through another of the sub-pipes, the main pipe is connected between the sub-pipes and the explosion-proof dust collector 81, and each sub-pipe is provided with a third check valve 57. By setting in this way, cross-flow of the sub-pipes can be avoided.

[0180] According to some embodiments of the present application, the present application also provides a battery slurry production device, including the mixing device provided in any of the above embodiments.

[0181] Please refer to Figure 5 , an embodiment of the present application provides a mixing device, which includes a first storage container 10, a second storage container 20, a stirring mechanism 30, a first gas supply mechanism 41, a second gas supply mechanism 42, a first switch member 51, a second switch member 52, a third switch member 53, a fourth switch member 54, a first check valve 55, a second check valve 56, a third check valve 57, an oxygen detector 70, an explosion-proof dust collector 81, and a negative pressure device 82.

[0182] The first storage container 10 includes a feeding bin 101 and a buffer bin 102 that are connected in communication. A first switch member 51 is provided between the feeding bin 101 and the buffer bin 102. The feeding cavity 111 has a feeding cavity 111, a second air inlet 122, a second sub-discharge port 132, and a third gas phase inlet 1011 that communicate with the feeding cavity 111. The buffer bin 102 has a buffer cavity 112, a first air inlet 121, a first sub-discharge port 131, and a first discharge port 14 that communicate with the buffer cavity 112.

[0183] The second storage container 20 has a loading cavity 21, a second discharge port 22, and a fourth gas phase inlet 23 that communicate with the loading cavity 21. The stirring mechanism 30 has a stirring cavity 31, a second gas phase inlet 32, a second discharge port 33, a first feed port 34, a second feed port 35, and a third discharge port 36 that communicate with the stirring cavity 31. The first feed port 34 is connected to the first discharge port 14, and the second feed port 35 is connected to the second discharge port 22.

[0184] The first gas supply mechanism 41 is respectively connected in communication with the first air inlet 121, the second air inlet 122, the second gas phase inlet 32, and the fourth gas phase inlet 23, and is configured to be able to input inert gas into the feeding cavity 111, the buffer cavity 112, and the stirring cavity 31, and is also configured to fill the loading cavity 21 with inert gas to drive the substances in the loading cavity 21 to enter the stirring cavity 31 through the second discharge port 22.

[0185] A second switch member 52 and a first check valve 55 are provided between the first gas supply mechanism 41 and the fourth gas phase inlet 23. Third switch members 53 and second check valves 56 are provided between the first gas supply mechanism 41 and the first air inlet 121, the second air inlet 122, and the second gas phase inlet 32. A third switch member 53 is provided between the first discharge port 14 and the first feed port 34. A third switch member 53 is provided between the second discharge port 22 and the second feed port 35.

[0186] The second gas supply mechanism 42 is connected in communication with the third gas phase inlet 1011 and is configured to be able to input either air or oxygen into the feeding cavity 111.

[0187] The oxygen detector 70 is configured to detect the concentration of oxygen. Oxygen detectors 70 are provided in the feeding chamber 111, the buffer chamber 112, and the stirring chamber 31. An oxygen detector 70 is provided on the side of the feeding bin 101 facing away from the feeding chamber 111, or on the side of the buffer bin 102 facing away from the buffer chamber 112, or on the side of the stirring mechanism 30 facing away from the stirring chamber 31.

[0188] The first air inlet 121, the second air inlet 122, and the second discharge port 33 are all connected to the explosion-proof dust collector 81. The negative pressure device 82 is configured to provide a suction force for the gas in the feeding chamber 111, the buffer chamber 112, and the stirring chamber 31 to enter the explosion-proof dust collector 81. Fourth switch members 54 and third check valves 57 are provided between the explosion-proof dust collector 81 and the first air inlet 121, the second air inlet 122, and the second discharge port 33.

[0189] The specific implementation process of the mixing device provided by the embodiment of the present application is as follows:

[0190] Put the powder into the feeding chamber 111, and close the third switch member 53 between the first switch member 51, the buffer bin 102, and the stirring mechanism 30, and the third switch member 53 between the second storage container 20 and the stirring mechanism 30;

[0191] Open the third switch member 53 between the first air supply mechanism 41 and the feeding bin 101, the third switch member 53 between the first air supply mechanism 41 and the buffer bin 102, the third switch member 53 between the first air supply mechanism 41 and the stirring mechanism 30, the fourth switch member 54 between the feeding bin 101 and the explosion-proof dust collector 81, the fourth switch member 54 between the buffer bin 102 and the explosion-proof dust collector 81, and the fourth switch member 54 between the stirring mechanism 30 and the explosion-proof dust collector 81, so that the feeding chamber 111, the buffer chamber 112, and the stirring chamber 31 are purged with inert gas. When the oxygen concentration detected by the oxygen detector 70 in the feeding chamber 111, the buffer chamber 112, and the stirring chamber 31 drops below 1%, the replacement is completed and the above switch members (except the fourth switch member 54 between the stirring mechanism 30 and the explosion-proof dust collector 81) are closed;

[0192] Open the first switch member 51, and input the powder in the feeding bin 101 into the buffer chamber 112. After the powder completely falls into the buffer chamber 112, close the first switch member 51;

[0193] Open the second switch member 52 and the third switch member 53 between the second storage container 20 and the stirring mechanism 30. The inert gas with a predetermined pressure can press the solvent into the stirring chamber 31, and the excess gas in the stirring chamber 31 can be discharged through the second discharge port 33. Then close the above switch members (except the fourth switch member 54 between the stirring mechanism 30 and the explosion-proof dust collector 81);

[0194] Open the third switching member 53 between the buffer bin 102 and the stirring mechanism 30, so that the powder in the buffer cavity 112 is input into the stirring cavity 31, and the excess gas can be discharged from the second discharge port 33. After the powder is completely emptied, close the above-mentioned switching member.

[0195] The stirring mechanism 30 stirs the powder and the solvent located in the stirring cavity 31 to form a mixed slurry. Open the third switching member 53 between the first gas supply mechanism 41 and the stirring mechanism 30, so that the inert gas with a predetermined pressure enters the stirring cavity 31 to press out the mixed slurry.

[0196] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0197] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A mixing device, characterized in that: include: A first material storage container, comprising a material storage cavity and a first gas phase inlet, a first discharge port and a first discharge port communicated with the material storage cavity; A second material storage container, comprising a receiving cavity and a second material discharge port communicated with the receiving cavity; A stirring mechanism, comprising a stirring chamber and a first feed port, a second feed port and a third discharge port connected to the stirring chamber, wherein the first feed port is connected to the first discharge port, the second feed port is connected to the second discharge port, the first storage container is configured to input powder into the stirring chamber, the second storage container is configured to input solvent into the stirring chamber, and the stirring mechanism is configured to stir the powder and the solvent in the stirring chamber to form a mixed slurry; The first gas supply mechanism is communicated with the first gas phase inlet and is configured to input an inert gas into the material storage chamber.

2. The mixing device according to claim 1, characterized in that: The first material storage container includes a feeding bin and a buffer bin, the material storage cavity includes a feeding cavity arranged in the feeding bin and a buffer cavity arranged in the buffer bin, the buffer bin is connected between the feeding bin and the first feeding port and has the first discharge port connected to the buffer cavity, the feeding bin is configured to input powder material into the buffer cavity, and the buffer bin is configured to input the powder material into the stirring cavity; The first gas phase inlet includes a first air inlet connected to the cache chamber, the first discharge port includes a first sub-discharge port connected to the cache chamber, and the first air inlet is connected to the first air supply mechanism.

3. The mixing device according to claim 2, characterized in that: In the height direction of the stirring mechanism, the height position of the feeding chamber is higher than the height position of the buffer chamber, and the height position of the buffer chamber is higher than the height position of the stirring chamber.

4. The mixing device according to claim 2, characterized in that: The mixing device further comprises a first switch component, which is disposed on a pipeline between the feeding bin and the buffer bin and is used to control the opening and closing of the pipeline.

5. The mixing device according to claim 2, characterized in that: The first gas phase inlet also includes a second air inlet connected to the feeding chamber, the first discharge port also includes a second sub-discharge port connected to the feeding chamber, the second air inlet is connected to the first air supply mechanism, and the first air supply mechanism is also configured to be able to input inert gas into the feeding chamber.

6. The mixing device according to claim 5, characterized in that: The feeding bin also has a third gas phase inlet connected to the feeding chamber, and the mixing device also includes a second air supply mechanism, which is connected to the third gas phase inlet and is configured to be able to input either air or oxygen into the feeding chamber.

7. The mixing device according to any one of claims 1 to 6, characterized in that: The stirring mechanism further comprises a second gas phase inlet and a second exhaust port communicated with the stirring chamber, the second gas phase inlet is communicated with the first gas supply mechanism, and the first gas supply mechanism is further configured to be able to input an inert gas into the stirring chamber.

8. The mixing device according to claim 7, characterized in that: In the height direction of the stirring mechanism, the second gas phase inlet and the second discharge port are both arranged at the top of the stirring mechanism.

9. The mixing device according to any one of claims 1 to 6, characterized in that: In the height direction of the first material storage container, the first discharge port is arranged at the top of the first material storage container, and the height position of the first gas phase inlet is lower than the height position of the first discharge port.

10. The mixing device according to any one of claims 1 to 6, characterized in that: The second material storage container also has a fourth gas phase inlet connected to the receiving chamber, and the fourth gas phase inlet is connected to the first gas supply mechanism. The first gas supply mechanism is also configured to input inert gas into the receiving chamber to drive the solvent in the receiving chamber to enter the stirring chamber through the second discharge port.

11. The mixing device according to claim 10, characterized in that: The mixing device further comprises a second switch component, which is disposed on the pipeline between the first gas supply mechanism and the fourth gas phase inlet and is used to control the opening and closing of the pipeline; And / or, the mixing device further comprises a first check valve, and the first check valve is arranged between the first gas supply mechanism and the fourth gas phase inlet.

12. The mixing device according to any one of claims 1 to 6, characterized in that: The mixing device further comprises a power mechanism, which is connected to the second material storage container and is configured to drive the solvent in the containing chamber to enter the stirring chamber through the second discharge port.

13. The mixing device according to any one of claims 1 to 6, characterized in that: The mixing device further comprises an oxygen detector, which is configured to detect the concentration of oxygen and is arranged in the material storage cavity.

14. The mixing device according to any one of claims 1 to 6, characterized in that: The mixing device also includes an oxygen detector, which is configured to detect the concentration of oxygen. The oxygen detector is arranged on the side of the first storage container facing away from the storage chamber, and / or the oxygen detector is arranged on the side of the second storage container facing away from the receiving chamber, and / or the oxygen detector is arranged on the side of the stirring mechanism facing away from the stirring chamber.

15. The mixing device according to any one of claims 1 to 6, characterized in that: The mixing device further comprises a third switch component, which is disposed on the pipeline between the first gas supply mechanism and the first gas phase inlet, and is used to control the opening and closing of the pipeline; And / or, the pipeline between the first discharge port and the first feed port is provided with the third switch component, and the third switch component is used to control the opening and closing of the pipeline; And / or, the pipeline between the second discharge port and the second feed port is provided with the third switch component, and the third switch component is used to control the opening and closing of the pipeline; And / or, the mixing device further comprises a second check valve, and the second check valve is arranged between the first gas supply mechanism and the first gas phase inlet.

16. The mixing device according to any one of claims 1 to 6, characterized in that: The mixing device also includes an explosion-proof dust collector and a negative pressure device which are connected to each other. The first discharge port is connected to the explosion-proof dust collector. The negative pressure device is configured to provide suction force for the gas or dust in the storage chamber to enter the explosion-proof dust collector.

17. The mixing device according to claim 16, characterized in that The mixing device further includes a fourth switch component, which is disposed on the pipeline between the explosion-proof dust collector and the first discharge port, and is used to control the opening and closing of the pipeline; And / or, the mixing device further comprises a third check valve, and the third check valve is arranged between the explosion-proof dust collector and the first discharge port.

18. A battery slurry production equipment, characterized in that: Comprising a mixing device as claimed in any one of claims 1 to 17.

Images