A solid-state battery negative electrode preparation device

Abstract

The present application provides a solid-state battery negative electrode preparation device, which belongs to the technical field of solid-state battery negative electrode preparation, and specifically includes a grinding mechanism, at least one first storage tank, a stirring mechanism, a coating mechanism and a molding assembly, wherein the grinding mechanism is used to grind the negative electrode active carbon material, the stirring mechanism includes a second storage tank, and all the outlets of the first storage tank and the grinding mechanism are connected to the inlet of the second storage tank, the coating mechanism is used to place the copper foil of the negative electrode, the outlet of the second storage tank is located above the copper foil, and the stirred adhesive is dropped at least twice on both sides of the copper foil on the coating mechanism, and the molding assembly is used to dry and roll-form the raw materials on the copper foil. Through the processing scheme of the present application, the fusion effect of the negative electrode active carbon material, the adhesive and the additive is improved.

Description

Technical Field

[0001] The present application relates to the field of solid-state battery negative electrode preparation, and in particular to a solid-state battery negative electrode preparation device. Background Art

[0002] In the negative electrode preparation process used by previous solid-state batteries, during production, the negative electrode active carbon materials inside the negative electrode preparation process were of different sizes or the materials were too large, which would cause uneven fusion of the negative electrode active carbon materials, adhesives and additives, reducing the effectiveness of the adhesive. Summary of the invention

[0003] In view of this, the present application provides a solid-state battery negative electrode preparation device, which solves the problems in the prior art and improves the fusion effect of the negative electrode active material carbon material, adhesive and additives.

[0004] The present application provides a solid-state battery negative electrode preparation device using the following technical solution:

[0005] A solid-state battery negative electrode preparation device comprises a grinding mechanism, at least one first storage tank, a stirring mechanism, a coating mechanism and a molding assembly, wherein the grinding mechanism is used to grind carbon material, a negative electrode active substance, the stirring mechanism comprises a second storage tank, and the outlets of all the first storage tanks and the grinding mechanism are connected to the inlet of the second storage tank, the coating mechanism is used to place the copper foil of the negative electrode, the outlet of the second storage tank is located above the copper foil, and the stirred adhesive is dropped at least twice onto both sides of the copper foil on the coating mechanism, and the molding assembly is used to dry and roll-form the raw materials on the copper foil.

[0006] Optionally, the polishing mechanism includes a polishing tank and a first telescopic rod and an extrusion block extending into the polishing tank, the first telescopic rod extends into the polishing tank from the top, and a feed port is arranged on the side wall of the polishing tank.

[0007] Optionally, a filter is provided on the bottom of the polishing tank, and a funnel is provided at the bottom of the filter, the inlet of the funnel is connected to the bottom of the polishing tank, and the outlet of the funnel is connected to the inlet of the second storage tank.

[0008] Optionally, the first storage tank and the second storage tank are both fixedly connected to the outside with a heating cylinder, and the first heating block is embedded in the interior of the heating cylinder.

[0009] Optionally, the stirring mechanism further includes a first motor and a transmission rod extending from a side wall of the second storage tank, the transmission rod is connected to an output end of the first motor, and a stirring blade is provided on the transmission rod.

[0010] Optionally, the transmission rod is sleeved with a first bevel gear and a third bevel gear which are relatively arranged, the first bevel gear is fixed on the transmission rod, the third bevel gear is rotatably sleeved on the transmission rod, a second bevel gear which meshes with the first bevel gear and the third bevel gear at the same time is fixed on the inner wall of the second storage tank, and a stirring paddle is fixedly connected to the outer periphery of the third bevel gear and the transmission rod.

[0011] Optionally, the smearing mechanism includes a valve arranged at the outlet of the second storage tank and a rotating disk arranged below the outlet of the second storage tank, the rotating disk is provided with a flip hole arranged relatively thereto, the flip hole can rotate with the rotating disk to below the outlet of the second storage tank, the inner surface of the flip hole is rotatably connected to a flip frame via a rotating shaft, the top of the flip frame is fixedly connected to a clamping block, and the rotating disk is provided with a flip member for controlling the flipping of the flip frame.

[0012] Optionally, the flip member includes a gear and a rack, the side of the flip frame is fixedly connected to the gear, and the rack is slidably disposed under the gear and meshes with the gear.

[0013] Optionally, the molding assembly includes a liftable top plate arranged below the rotating disk, when one of the two opposite flip holes is rotated to be directly below the outlet of the second storage tank, the other flip hole is located directly above the top plate, a rotating rod is provided above the top plate, and the axial direction of the rotating rod is parallel to the top plate, the molding assembly also includes a third telescopic rod for driving the rotating rod to rise and fall, and a second telescopic rod for driving the third telescopic rod to reciprocate parallel to the top plate.

[0014] Optionally, a fixing groove is formed inside the top plate and the rotating rod, and a second heating block is fixedly connected inside the fixing groove.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] (1) The grinding mechanism of the present application refines the particles of the negative electrode active material carbon material, so that the negative electrode active material carbon material is more fully in contact with the binder and the additive, thereby improving the fusion effect of the negative electrode active material carbon material, the binder and the additive, and improving the success rate of the negative electrode material preparation;

[0017] (2) Open the valve at the bottom of the second storage tank, let the adhesive fall on the outside of the copper foil, start the second motor, rotate the rotating disk 360°, and at the same time, the rack is engaged to rotate the gear 180°, open the valve at the bottom of the second storage tank, and let the adhesive fall on the outside of the copper foil. In this way, the adhesive can be bonded to both sides of the copper foil, thereby improving work efficiency;

[0018] (3) By setting the relative flip holes and the flip holes, after the copper foil and the adhesive on one flip frame are combined and formed, there is exactly one copper foil located below the outlet of the second storage tank, and the next copper foil coating step can be started immediately, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the negative electrode preparation device for solid-state batteries of the present application;

[0021] Figure 2 This is a schematic diagram of the structure of the grinding mechanism of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the stirring mechanism of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the smear mechanism for this application;

[0024] Figure 5 This is a schematic diagram of the structure of the molding component of this application.

[0025] Explanation of the reference numerals: 1. support frame; 2. grinding mechanism; 3. first storage tank; 4. pipeline; 5. stirring mechanism; 6. coating mechanism; 7. forming assembly; 8. grinding tank; 9. first telescopic rod; 10. extrusion block; 11. feed port; 12. filter screen; 13. funnel; 14. second storage tank; 15. first motor; 16. transmission rod; 17. first bevel gear; 18. second bevel gear; 19. third bevel gear; 20. stirring blade; 21. rotating disk; 22. second motor; 23. flip hole; 24. flip frame; 25. gear; 26. rack; 27. heating cylinder; 28. first heating block; 29. ​​annular frame; 30. fixed cover; 31. second telescopic rod; 32. third telescopic rod; 33. rotating rod; 34. top plate; 35. second heating block; 36. fourth telescopic rod. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0028] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0030] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0031] An embodiment of the present application provides a device for preparing a negative electrode of a solid-state battery.

[0032] A solid-state battery negative electrode preparation device includes a support frame 1, a grinding mechanism 2, at least one first storage tank 3, a stirring mechanism 5, a coating mechanism 6 and a molding assembly 7. The grinding mechanism 2 and the first storage tank 3 are installed on the uppermost layer of the support frame 1, the stirring mechanism 5 is installed on the middle layer of the support frame 1, and the coating mechanism 6 and the molding assembly 7 are installed on the lowermost layer of the support frame 1. The grinding mechanism 2 is used to grind the carbon material of the negative electrode active substance, the stirring mechanism 5 includes a second storage tank 14, all the outlets of the first storage tank 3 and the grinding mechanism 2 are connected to the inlet of the second storage tank 14 through a pipe 4, the coating mechanism 6 is used to place the copper foil of the negative electrode, the outlet of the second storage tank 14 is located above the copper foil, and the stirred adhesive is dropped on the two sides of the copper foil on the coating mechanism 6 at least twice, and the molding assembly 7 is used to dry and roll-form the raw materials on the copper foil.

[0033] The grinding mechanism 2 includes a grinding tank 8, a first telescopic rod 9 and an extrusion block 10 extending into the grinding tank 8, wherein the first telescopic rod 9 extends into the grinding tank 8 from the top, and a feed port 11 is provided on the side wall of the grinding tank 8, and the negative electrode active carbon material is added into the first storage tank 3 from the feed port 11. A filter screen 12 is provided on the bottom of the grinding tank 8, and a funnel 13 is provided at the bottom of the filter screen 12, the inlet of the funnel 13 is connected to the bottom of the grinding tank 8, and the outlet of the funnel 13 is connected to the inlet of the second storage tank 14. The first telescopic rod 9 can be a cylinder or a hydraulic cylinder, and the piston rod of the cylinder or the hydraulic cylinder extends into the top of the first storage tank 3 and is connected to the extrusion block 10. The extrusion block 10 moves up and down under the action of the first telescopic rod 9, and the negative electrode active carbon material in the first storage tank 3 is extruded and ground, and the particles of the negative electrode active carbon material can only pass through the filter screen 12 when they are small enough.

[0034] The present application provides two first storage tanks 3 for storing the binder and the additive respectively. The ground negative electrode active carbon material, the binder and the additive enter the second storage tank 14 for stirring.

[0035] The stirring mechanism 5 also includes a first motor 15 and a transmission rod 16 extending from the side wall of the second storage tank 14. The transmission rod 16 is rotatably connected to the side wall of the second storage tank 14 via a bearing and a sealing ring. The sealing ring serves to seal the connection position between the transmission rod 16 and the side wall of the second storage tank 14. The transmission rod 16 is connected to the output end of the first motor 15. A stirring paddle 20 is provided on the transmission rod 16 inside the second storage tank 14. The transmission rod 16 is sleeved with a first bevel gear 17 and a third bevel gear 19 which are arranged opposite to each other. The first bevel gear 17 is fixed on the transmission rod 16, and the third bevel gear 19 is rotatably sleeved on the transmission rod 16. A second bevel gear 18 which meshes with the first bevel gear 17 and the third bevel gear 19 is fixed on the inner wall of the second storage tank 14. The second bevel gear 18 is installed on the inner wall of the second storage tank 14 through a fixed bracket, one end of the fixed bracket is fixedly connected to the inner wall of the second storage tank 14, and the other end is connected to the second bevel gear 18 through a bearing. A stirring paddle 20 is fixedly connected to the outer periphery of the third bevel gear 19 and the transmission rod 16. After the first motor 15 is started, the first motor 15 drives the transmission rod 16 to rotate, and the transmission rod 16 directly drives one of the stirring paddles 20 to rotate, and drives the second bevel gear 18 to rotate through the first bevel gear 17, and the second bevel gear 18 drives the third bevel gear 19 to rotate, thereby driving another stirring paddle 20 to rotate, so that the two groups of stirring paddles 20 move in opposite directions to evenly stir the negative electrode active material carbon material, the binder and the additive into a cement.

[0036] The first storage tank 3 and the second storage tank 14 are both fixedly connected to the outside with a heating cylinder 27, and the inside of the heating cylinder 27 is embedded with a first heating block 28. The heating cylinder 27 outside the first storage tank 3 heats the binder and the additive to increase the fluidity of the binder and the additive. The heating of the heating cylinder 27 of the second storage tank 14 is conducive to mixing the negative electrode active material carbon material, the binder and the additive into a glue.

[0037] The coating mechanism 6 includes a valve disposed at the outlet of the second storage tank 14 and a rotating disk 21 disposed below the outlet of the second storage tank 14, the rotating disk 21 is provided with a relatively arranged flip hole 23, the flip hole 23 can rotate with the rotating disk 21 to the below of the outlet of the second storage tank 14, the inner surface of the flip hole 23 is rotatably connected with a flip frame 24 through a rotating shaft, the top of the flip frame 24 is fixedly connected with a clamping block, and the rotating disk 21 is provided with a flipping member for controlling the flipping of the flip frame 24. The flipping member can flip the copper foil on the clamping block 180°.

[0038] The flip member includes a gear 25 and a rack 26. The side of the flip frame 24 is fixedly connected to the gear 25. The rack 26 is slidably arranged below the gear 25 and meshes with the gear 25. Specifically, the rack 26 can be fixed on the rotating disk 21 through a slide rail (the rack 26 is not shown in the drawings).

[0039] In the embodiment of the present application, the rotating disk 21 is circular, and the second motor 22 is fixed under the rotating disk 21. The output shaft of the second motor 22 is connected to the center of the rotating disk 21 to drive the rotating disk 21 to rotate. Two flip holes 23 are symmetrically arranged on the rotating disk 21 about the center of the circle.

[0040] The molding assembly 7 includes a liftable top plate 34 arranged below the rotating disk 21. When one of the two opposite flip holes 23 rotates to be directly below the outlet of the second storage tank 14, the other flip hole 23 is located directly above the top plate 34. A rotating rod 33 is provided above the top plate 34. The axial direction of the rotating rod 33 is parallel to the top plate 34. The molding assembly 7 also includes a third telescopic rod 32 for driving the rotating rod 33 to rise and fall, and a second telescopic rod 31 for driving the third telescopic rod 32 to reciprocate parallel to the top plate 34.

[0041] Specifically, an annular frame 29 is arranged around the outer periphery of the second motor 22, the outer diameter of the annular frame 29 is larger than the rotating disk 21, the annular frame 29 is fixed on the base of the support frame 1, a fixed cover 30 extending upward to the top of the top plate 34 is fixed on one side of the annular frame 29, a moving groove extending toward the outlet direction of the second storage tank 14 is arranged on the fixed cover 30, and a second telescopic rod 31 is arranged on the side of the fixed cover 30 away from the outlet of the second storage tank 14, and the telescopic direction of the second telescopic rod 31 is consistent with the extension direction of the moving groove; the end of the second telescopic rod 31 is fixedly connected to the third telescopic rod 32, the third telescopic rod 32 is telescopic in the vertical direction and passes through the moving groove, the third telescopic rod 32 is connected to the rotating rod 33 through a rotating shaft, and the axis of the rotating rod 33 is parallel to the top plate 34 and perpendicular to the extension direction of the moving groove. The lifting function of the top plate 34 is realized by the fourth telescopic rod 36 fixed on the base of the support frame 1. Among them, the second telescopic rod 31, the third telescopic rod 32 and the fourth telescopic rod 36 can be cylinders or hydraulic cylinders.

[0042] The top plate 34 and the rotating rod 33 are both provided with fixing grooves inside, and the second heating block 35 is fixedly connected inside the fixing grooves.

[0043] The working process of the coating mechanism 6 and the forming component 7 is as follows: control the rotating disk 21 to rotate until a flip hole 23 is located directly below the outlet of the second storage tank 14, and fix the copper foil by a clamp, open the valve at the bottom of the second storage tank 14, and the raw material falls on one side of the copper foil, start the second motor 22, rotate the rotating disk 21 360°, and at the same time pull the rack 26 to rotate the gear 25 180° through the meshing connection, and the copper foil flips 180°, and then open the valve at the bottom of the second storage tank 14 to allow the adhesive to fall on the other side of the copper foil, so that the adhesive can be bonded to both sides of the copper foil, thereby improving work efficiency.

[0044] The second motor 22 is started again, the rotating disk 21 is rotated 180°, the copper foil with adhesive is moved to the top of the top plate 34, the third telescopic rod 32 and the fourth telescopic rod 36 are extended, the top plate 34 and the rotating rod 33 are dropped on the bottom and top of the copper foil, the top plate 34 squeezes the adhesive at the bottom of the copper foil on the bottom of the copper foil, the second telescopic rod 31 is extended, and the rotating rod 33 is moved on the top of the copper foil to evenly apply the adhesive on the top and bottom of the copper foil. In this way, the adhesive can be dryly attached to the outside of the copper foil by starting the second heating block 35, and quickly rolled into shape.

[0045] The implementation process of this application is:

[0046] S1. Material pretreatment: put the negative electrode active carbon material into the polishing tank 8, start the first telescopic rod 9, move the extrusion block 10 downward, press the negative electrode active carbon material into powder, and let it fall into the funnel 13 through the filter 12, and then pour the adhesive and additive into the two groups of first storage tanks 3 respectively, and start the first heating block 28 at the same time to heat the adhesive and additive in the first storage tank 3 to increase the fluidity of the adhesive and additive.

[0047] S2, mixing and stirring: the fine negative electrode active carbon material, binder and additive screened in step S1 flow into the interior of the second vacuum storage tank 14, and the first motor 15 is started at the same time, the first motor 15 drives the transmission rod 16 to rotate, and the second bevel gear 18 is driven to rotate through the first bevel gear 17, and the second bevel gear 18 drives the third bevel gear 1919 to rotate, so that the two groups of stirring blades 20 move in opposite directions, and the first heating block 28 is started to evenly stir the negative electrode active carbon material, binder and additive into a glue.

[0048] S3, solution application: put the copper foil into the inside of the flip frame 24, and let the clamp block fix the copper foil, open the valve at the bottom of the second storage tank 14, and let the adhesive stirred evenly in step S2 fall on one side of the copper foil, start the second motor 22, rotate the rotating disk 21 360°, and at the same time pull the rack 26 through the meshing connection to let the gear 25 rotate 180°, open the valve at the bottom of the second storage tank 14, and let the adhesive fall on the other side of the copper foil.

[0049] S4, roller forming: start the second motor 22, rotate the rotating disk 21 180°, move the copper foil with adhesive in step S3 to the top of the top plate 34, extend the third telescopic rod 32 and the fourth telescopic rod 36, drop the top plate 34 and the rotating rod 33 on the top and bottom of the copper foil, the top plate 34 squeezes the adhesive on the bottom of the copper foil, extend the second telescopic rod 31, move the rotating rod 33 on the top of the copper foil, evenly apply the adhesive on the top and bottom of the copper foil, and start the second heating block 35 at the same time, dry the adhesive and stick it to the outside of the copper foil, and roller form it.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A solid-state battery negative electrode preparation device, characterized in that: It includes a grinding mechanism, at least one first storage tank, a stirring mechanism, a coating mechanism and a molding assembly, wherein the grinding mechanism is used to grind the carbon material of the negative electrode active substance, the stirring mechanism includes a second storage tank, and the outlets of all the first storage tanks and the grinding mechanism are connected to the inlet of the second storage tank. The coating mechanism is used to place the copper foil of the negative electrode, and the outlet of the second storage tank is located above the copper foil. The stirred adhesive is dropped at least twice on both sides of the copper foil on the coating mechanism, and the molding assembly is used to dry and roll-form the raw materials on the copper foil; The polishing mechanism comprises a polishing tank, a first telescopic rod and an extrusion block extending into the polishing tank, wherein the first telescopic rod extends into the polishing tank from the top, and a feed port is arranged on the side wall of the polishing tank; The stirring mechanism further comprises a first motor and a transmission rod extending from the side wall of the second storage tank, the transmission rod is connected to the output end of the first motor, and a stirring blade is arranged on the transmission rod; The smearing mechanism comprises a valve arranged at the outlet of the second storage tank and a rotating disk arranged below the outlet of the second storage tank, the rotating disk is provided with a relatively arranged flip hole, the flip hole can rotate with the rotating disk to the bottom of the outlet of the second storage tank, the inner surface of the flip hole is rotatably connected to a flip frame through a rotating shaft, the top of the flip frame is fixedly connected to a clamping block, and the rotating disk is provided with a flip member for controlling the flipping of the flip frame; The flip member includes a gear and a rack, the side of the flip frame is fixedly connected to the gear, and the rack is slidably arranged under the gear and meshes with the gear; The molding assembly includes a liftable top plate arranged below the rotating disk. When one of the two opposite flip holes is rotated to be directly below the outlet of the second storage tank, the other flip hole is located directly above the top plate. A rotating rod is provided above the top plate, and the axial direction of the rotating rod is parallel to the top plate. The molding assembly also includes a third telescopic rod for driving the rotating rod to rise and fall, and a second telescopic rod for driving the third telescopic rod to reciprocate parallel to the top plate.

2. The solid-state battery negative electrode preparation device according to claim 1, characterized in that: A filter is provided on the bottom of the polishing tank, a funnel is provided at the bottom of the filter, an inlet of the funnel is connected to the bottom of the polishing tank, and an outlet of the funnel is connected to the inlet of the second storage tank.

3. The solid-state battery negative electrode preparation device according to claim 1, characterized in that: The first storage tank and the second storage tank are both fixedly connected to the outside with a heating cylinder, and the inside of the heating cylinder is embedded with a first heating block.

4. The solid-state battery negative electrode preparation device according to claim 1, characterized in that: The transmission rod is sleeved with a first bevel gear and a third bevel gear which are arranged opposite to each other, the first bevel gear is fixed on the transmission rod, the third bevel gear is rotatably sleeved on the transmission rod, a second bevel gear which meshes with the first bevel gear and the third bevel gear is fixed on the inner wall of the second storage tank, and a stirring paddle is fixedly connected to the outer periphery of the third bevel gear and the transmission rod.

5. The solid-state battery negative electrode preparation device according to claim 1, characterized in that: The top plate and the rotating rod are both provided with fixing grooves, and the inside of the fixing grooves is fixedly connected with the second heating block.

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