Preparation device and preparation method of composite negative electrode material for lithium battery

Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to a preparation device and a preparation method of a composite negative electrode material for a lithium battery, the preparation device comprises a bottom plate, the top of the bottom plate is connected with a bearing plate through a rotating assembly, and the bearing plate is rotatably connected with a mixing box of which the size can be changed; and a driving assembly for rotating the mixing box is arranged at the top end of the bearing plate. According to the invention, by arranging the mixing box of which the size can be changed, the capacity of the mixing box can be correspondingly adjusted according to actual conditions, so that the operation times of the mixing device can be reduced when the composite negative electrode material is more, and the cleaning area of personnel can be reduced and the labor intensity can be reduced when the composite negative electrode material is less; in addition, when the mixing device is stored, the occupied space of the equipment can be reduced to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a device for preparing a composite negative electrode material for a lithium battery and a method for preparing the same. Background Art

[0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing and storage of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become mainstream; and composite negative electrode materials are an indispensable type of substance for the preparation of lithium batteries. The performance of composite negative electrode materials has an important influence on the quality of lithium batteries. During the production and processing of lithium batteries, their negative electrode materials need to be mixed.

[0003] However, the existing mixing device has a fixed volume, which results in an increase in the number of times the mixing device is operated when there are more negative electrode materials to be mixed; conversely, when there are fewer negative electrode materials to be mixed, the cleaning area of ​​the mixing device by personnel will be increased, and the strength will be improved; in addition, when the mixing device is stored, it will also occupy a certain space to a certain extent. Therefore, a composite negative electrode material preparation device for lithium batteries and a preparation method thereof are invented. Summary of the invention

[0004] In view of the above and / or existing problems in a composite negative electrode material preparation device for a lithium battery and a preparation method thereof, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a composite negative electrode material preparation device for lithium batteries and a preparation method thereof, which can solve the above-mentioned existing problems.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A device for preparing composite negative electrode materials for lithium batteries, comprising a bottom plate, the top of which is connected to a carrier plate via a rotating assembly, a mixing box whose size can be changed is rotatably connected to the carrier plate, and a driving assembly for rotating the mixing box is provided at the top of the carrier plate;

[0008] The mixing box comprises:

[0009] A first annular plate, the first annular plate being rotatably connected to the bearing plate via a bearing;

[0010] Annular grooves, both ends of the first annular plate are provided with annular grooves;

[0011] The cylinder is slidably connected in the annular groove.

[0012] As a preferred solution of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the mixing box further comprises:

[0013] A first connecting plate, wherein both ends of the first annular plate are fixedly mounted with the first connecting plate;

[0014] A first cylinder, the first cylinder being fixedly mounted on a first connecting plate;

[0015] The second connecting plate is fixedly mounted on the cylinder body, and the piston rod of the first cylinder is fixedly mounted on the second connecting plate.

[0016] As a preferred solution of the device for preparing a composite negative electrode material for a lithium battery described in the present invention, one group of the ends of the cylinder is provided with an opening, a sealing cover is provided at the opening, a second annular plate is fixedly installed on one side of the sealing cover, and the second annular plate is threadedly connected in the opening, and a handle is fixedly installed on the other side of the sealing cover.

[0017] As a preferred embodiment of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the rotating assembly comprises:

[0018] Side panels, both ends of the top of the bottom plate are fixedly mounted with side panels;

[0019] A first rotating shaft, wherein the first rotating shaft is rotatably connected between the two sets of side plates through a bearing, and a bearing plate is fixedly mounted on the first rotating shaft;

[0020] A first servo motor is fixedly mounted on a set of side plates, and an output shaft of the first servo motor is fixedly connected to the first rotating shaft.

[0021] As a preferred solution of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the driving component comprises:

[0022] A second rotating shaft, the second rotating shaft is rotatably connected to the top end of the bearing plate through a bearing;

[0023] The first gear is fixedly mounted on the second rotating shaft.

[0024] As a preferred solution of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the driving component further comprises:

[0025] A second gear, wherein the second gear is fixedly mounted on the first annular plate, and the first gear and the second gear are meshed and connected;

[0026] The second servo motor is fixedly mounted on the top of the bearing plate, and the output shaft of the second servo motor is fixedly connected to the second rotating shaft.

[0027] As a preferred solution of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, it further comprises:

[0028] A cleaning component is used for cleaning the inner cavity of the mixing box, and the cleaning component is arranged on another group of cylinders.

[0029] As a preferred embodiment of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the cleaning component comprises:

[0030] L-shaped rods, and L-shaped rods are fixedly installed at both ends of one side of the cylinder of another group;

[0031] A support block, the support block being fixedly mounted between the two sets of L-shaped rods;

[0032] A third rotating shaft, the third rotating shaft is rotatably connected to the support block through a bearing;

[0033] The third servo motor is fixedly mounted on one side of the support block, and the output shaft of the third servo motor is fixedly connected to the third rotating shaft.

[0034] As a preferred embodiment of the device for preparing a composite negative electrode material for a lithium battery according to the present invention, the cleaning component further comprises:

[0035] A box body, wherein the box body is fixedly mounted on one end of the third rotating shaft, and one end of the box body is fixedly mounted on another set of cylinder bodies;

[0036] a second cylinder, the second cylinder being fixedly mounted in the box body;

[0037] A circular plate, the piston rod of the second cylinder is fixedly mounted with the circular plate, and the circular plate is located in the mixing box;

[0038] The sponge is fixedly mounted on the outer side of the circular plate, and the sponge is in contact with the inner surface of the mixing box.

[0039] A method for preparing a composite negative electrode material for a lithium battery comprises the following specific steps:

[0040] Step 1: The cylinder is moved in the annular groove by the first cylinder until the mixing box is in the required size;

[0041] Step 2: The mixing box is tilted by the first servo motor so that the opening is tilted upward, and then the weighed graphite powder, conductive agent and binder are placed in the mixing box, and then the opening is sealed by the sealing cover and the second annular plate;

[0042] Step 3: The mixing box is restored to its original position by the first servo motor, and then the mixing box is rotated by the second servo motor so that the composite negative electrode material can tumble in the mixing box to achieve mixing;

[0043] Step 4: After mixing, the mixing box is tilted by the first servo motor so that the opening is tilted downward, and then the sealing cover is removed to remove the mixed composite negative electrode material;

[0044] Step 5: The mixing box is tilted by the first servo motor so that the opening is tilted upward, and then water is poured in and the opening is sealed with the sealing cover and the second annular plate. Then, the mixing box is restored to its original position by the first servo motor. After that, the sponge is rotated and moved in the mixing box by the cooperation of the third servo motor and the second cylinder, so that the mixing box can be cleaned.

[0045] Compared with existing technologies:

[0046] 1. By providing a mixing box whose size can be changed, the capacity of the mixing box can be adjusted accordingly according to the actual situation, thereby reducing the number of times the mixing device is operated when there are more composite negative electrode materials, and reducing the cleaning area of ​​personnel when there are fewer composite negative electrode materials, thereby reducing the labor intensity. In addition, when the mixing device is stored, the occupied space of the equipment can be reduced to a certain extent; in addition, by providing a driving component for rotating the mixing box, the composite negative electrode material can be tumbled and mixed in the mixing box, thereby reducing the structure inside the mixing box, and further reducing the difficulty of cleaning the mixing box;

[0047] 2. By setting up a cleaning component, it is possible to clean the inner cavity of the mixing box. By cleaning the inner cavity of the mixing box, it is easier for personnel to clean the mixing box to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0049] Figure 2 It is a schematic side view of the rotating assembly of the present invention;

[0050] Figure 3 It is a schematic diagram of the local structure of the mixing box of the present invention;

[0051] Figure 4 This is a schematic diagram of the L-shaped rod and support block structure of the present invention;

[0052] Figure 5 This is a schematic diagram of the circular plate and sponge structure of the present invention;

[0053] Figure 6It is a schematic diagram of the structure of the sealing cover and the second annular plate of the present invention.

[0054] In the figure: bottom plate 10, carrying plate 20, side plate 30, first rotating shaft 31, first servo motor 32, first annular plate 40, annular groove 41, cylinder 42, first connecting plate 43, first cylinder 44, second connecting plate 45, sealing cover 46, second annular plate 47, handle 48, second rotating shaft 50, first gear 51, second gear 52, second servo motor 53, L-shaped rod 60, support block 61, third rotating shaft 62, third servo motor 63, box body 64, second cylinder 65, circular plate 66, sponge 67. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0056] The present invention provides a device for preparing a composite negative electrode material for a lithium battery. Figure 1-Figure 6 , comprising a bottom plate 10, the top of the bottom plate 10 is connected to a carrying plate 20 through a rotating assembly, a mixing box whose size can be changed is rotatably connected to the carrying plate 20, and a driving assembly for rotating the mixing box is provided at the top of the carrying plate 20;

[0057] The mixing box includes: a first annular plate 40, an annular groove 41, a barrel 42, a first connecting plate 43, a first cylinder 44, a second connecting plate 45, a sealing cover 46, a second annular plate 47, and a handle 48;

[0058] The first annular plate 40 is rotatably connected to the supporting plate 20 through a bearing, annular grooves 41 are provided at both ends of the first annular plate 40, a cylinder 42 is slidably connected in the annular grooves 41, first connecting plates 43 are fixedly installed at both ends of the first annular plate 40, a first cylinder 44 is fixedly installed on the first connecting plate 43, a second connecting plate 45 is fixedly installed on the cylinder 42, and a piston rod of the first cylinder 44 is fixedly installed on the second connecting plate 45, an opening is provided at one end of a group of cylinders 42, a sealing cover 46 is provided at the opening, a second annular plate 47 is fixedly installed on one side of the sealing cover 46, and the second annular plate 47 is threadedly connected in the opening, and a handle 48 is fixedly installed on the other side of the sealing cover 46.

[0059] The rotating assembly includes: a side plate 30, a first rotating shaft 31, and a first servo motor 32;

[0060] Side plates 30 are fixedly installed at both ends of the top of the base plate 10, the first rotating shaft 31 is rotatably connected between the two groups of side plates 30 through a bearing, and the supporting plate 20 is fixedly installed on the first rotating shaft 31, the first servo motor 32 is fixedly installed on one group of side plates 30, and the output shaft of the first servo motor 32 is fixedly connected to the first rotating shaft 31.

[0061] The driving assembly includes: a second rotating shaft 50, a first gear 51, a second gear 52, and a second servo motor 53;

[0062] The second rotating shaft 50 is rotatably connected to the top of the supporting plate 20 through a bearing, the first gear 51 is fixedly mounted on the second rotating shaft 50, the second gear 52 is fixedly mounted on the first annular plate 40, and the first gear 51 and the second gear 52 are meshingly connected, the second servo motor 53 is fixedly mounted on the top of the supporting plate 20, and the output shaft of the second servo motor 53 is fixedly connected to the second rotating shaft 50.

[0063] It also includes: a cleaning assembly for cleaning the inner cavity of the mixing box, and the cleaning assembly is arranged on another set of cylinders 42;

[0064] The cleaning assembly includes: an L-shaped rod 60, a support block 61, a third rotating shaft 62, a third servo motor 63, a box body 64, a second cylinder 65, a circular plate 66, and a sponge 67;

[0065] L-shaped rods 60 are fixedly installed at both ends of one side of another group of cylinders 42, a support block 61 is fixedly installed between the two groups of L-shaped rods 60, a third rotating shaft 62 is rotatably connected to the support block 61 through a bearing, a third servo motor 63 is fixedly installed on one side of the support block 61, and the output shaft of the third servo motor 63 is fixedly connected to the third rotating shaft 62, a box body 64 is fixedly installed on one end of the third rotating shaft 62, and one end of the box body 64 is fixedly installed on the other group of cylinders 42, a second cylinder 65 is fixedly installed in the box body 64, a piston rod of the second cylinder 65 is fixedly installed on a circular plate 66, and the circular plate 66 is located in a mixing box, a sponge 67 is fixedly installed on the outer side of the circular plate 66, and the sponge 67 is in contact with the inner surface of the mixing box.

[0066] A method for preparing a composite negative electrode material for a lithium battery comprises the following specific steps:

[0067] Step 1: The cylinder 42 is moved in the annular groove 41 by the first cylinder 44 until the mixing box is in the required size;

[0068] Step 2: The mixing box is tilted by the first servo motor 32 so that the opening is tilted upward, and then the weighed graphite powder, conductive agent and adhesive are placed in the mixing box, and then the opening is sealed by the sealing cover 46 and the second annular plate 47;

[0069] Step 3: The mixing box is restored to its original position by the first servo motor 32, and then the mixing box is rotated by the second servo motor 53, so that the composite negative electrode material can tumble in the mixing box to achieve mixing;

[0070] Step 4: After mixing, the mixing box is tilted by the first servo motor 32 so that the opening is tilted downward, and then the sealing cover 46 is removed to remove the mixed composite negative electrode material;

[0071] Step 5: The mixing box is tilted by the first servo motor 32 so that the opening is tilted upward, and then water is poured in, and the opening is sealed by the sealing cover 46 and the second annular plate 47. Then, the mixing box is restored to its original position by the first servo motor 32, and then, the sponge 67 is rotated and moved in the mixing box by the cooperation of the third servo motor 63 and the second cylinder 65, so that the mixing box can be cleaned.

[0072] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for preparing a composite negative electrode material for a lithium battery, comprising a bottom plate (10), characterized in that: The top of the bottom plate (10) is connected to a carrying plate (20) via a rotating assembly, a mixing box whose size can be changed is rotatably connected to the carrying plate (20), and a driving assembly for rotating the mixing box is provided at the top of the carrying plate (20); The mixing box comprises: A first annular plate (40), the first annular plate (40) being rotatably connected to the bearing plate (20) via a bearing; Annular grooves (41), both ends of the first annular plate (40) are provided with annular grooves (41); The cylinder (42) is slidably connected in the annular groove (41).

2. The device for preparing a composite negative electrode material for a lithium battery according to claim 1, characterized in that: The mixing box also includes: A first connecting plate (43), with the first connecting plate (43) being fixedly mounted on both ends of the first annular plate (40); A first cylinder (44), wherein the first cylinder (44) is fixedly mounted on the first connecting plate (43); A second connecting plate (45), the second connecting plate (45) is fixedly mounted on the cylinder (42), and the piston rod of the first cylinder (44) is fixedly mounted on the second connecting plate (45).

3. The device for preparing a composite negative electrode material for a lithium battery according to claim 2, characterized in that: An opening is formed at the end of a group of the cylinders (42), and a sealing cover (46) is provided at the opening. A second annular plate (47) is fixedly mounted on one side of the sealing cover (46), and the second annular plate (47) is threadedly connected in the opening. A handle (48) is fixedly mounted on the other side of the sealing cover (46).

4. The device for preparing a composite negative electrode material for a lithium battery according to claim 1, characterized in that: The rotating assembly comprises: Side plates (30), the top ends of the bottom plate (10) are fixedly mounted with side plates (30); A first rotating shaft (31), wherein the first rotating shaft (31) is rotatably connected between the two sets of side plates (30) via a bearing, and a bearing plate (20) is fixedly mounted on the first rotating shaft (31); A first servo motor (32), wherein the first servo motor (32) is fixedly mounted on a set of side plates (30), and an output shaft of the first servo motor (32) is fixedly connected to the first rotating shaft (31).

5. The device for preparing a composite negative electrode material for a lithium battery according to claim 1, characterized in that: The drive assembly comprises: A second rotating shaft (50), the second rotating shaft (50) being rotatably connected to the top end of the bearing plate (20) via a bearing; A first gear (51), wherein the first gear (51) is fixedly mounted on the second rotating shaft (50).

6. The device for preparing a composite negative electrode material for a lithium battery according to claim 5, characterized in that: The drive assembly also includes: A second gear (52), the second gear (52) is fixedly mounted on the first annular plate (40), and the first gear (51) and the second gear (52) are meshingly connected; A second servo motor (53), wherein the second servo motor (53) is fixedly mounted on the top end of the bearing plate (20), and an output shaft of the second servo motor (53) is fixedly connected to the second rotating shaft (50).

7. The device for preparing a composite negative electrode material for a lithium battery according to claim 1, characterized in that: Also includes: A cleaning component is used to clean the inner cavity of the mixing box, and the cleaning component is arranged on another group of cylinders (42).

8. The device for preparing a composite negative electrode material for a lithium battery according to claim 7, characterized in that: The cleaning component comprises: L-shaped rods (60), with L-shaped rods (60) fixedly mounted on both ends of one side of the other group of cylinders (42); A support block (61), wherein the support block (61) is fixedly mounted between the two groups of L-shaped rods (60); A third rotating shaft (62), wherein the third rotating shaft (62) is rotatably connected to the supporting block (61) via a bearing; A third servo motor (63), wherein the third servo motor (63) is fixedly mounted on one side of the support block (61), and an output shaft of the third servo motor (63) is fixedly connected to the third rotating shaft (62).

9. The device for preparing a composite negative electrode material for a lithium battery according to claim 8, characterized in that: The cleaning assembly also includes: A box body (64), wherein the box body (64) is fixedly mounted on one end of the third rotating shaft (62), and one end of the box body (64) is fixedly mounted on another set of cylinder bodies (42); A second cylinder (65), the second cylinder (65) being fixedly installed in the box body (64); A circular plate (66), the piston rod of the second cylinder (65) is fixedly mounted with the circular plate (66), and the circular plate (66) is located in the mixing box; A sponge (67) is fixedly mounted on the outer side of the circular plate (66), and the sponge (67) is in contact with the inner surface of the mixing box.

10. A method for preparing a composite negative electrode material for a lithium battery, characterized in that: The specific steps are as follows: Step 1: Using a first cylinder (44) to move the barrel (42) in the annular groove (41) until the mixing box is at a desired size; Step 2: The mixing box is tilted by a first servo motor (32) so that the opening is tilted upward, and then the weighed graphite powder, conductive agent and adhesive are placed in the mixing box, and then the opening is sealed by a sealing cover (46) and a second annular plate (47); Step 3: The mixing box is restored to its original position by the first servo motor (32), and then the mixing box is rotated by the second servo motor (53) so that the composite negative electrode material can tumble in the mixing box to achieve mixing; Step 4: After mixing, the mixing box is tilted by the first servo motor (32) so that the opening is tilted downward, and then the sealing cover (46) is removed to remove the mixed composite negative electrode material; Step 5: The mixing box is tilted by the first servo motor (32) so that the opening is tilted upward, and then water is poured in and the opening is sealed by the sealing cover (46) and the second annular plate (47). Then, the mixing box is restored to its original position by the first servo motor (32), and then the mixing box is returned to its original position by the third servo motor (32). The cooperation between the motor (63) and the second cylinder (65) causes the sponge (67) to rotate and move in the mixing box. At this point, the mixing box can be cleaned.

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