A device for producing lithium battery anode materials

Abstract

The present invention discloses a device for producing anode materials for lithium batteries, comprising a material box, an extrusion plate, a support frame, a mixing and smoothing strip and a rotating transmission member, wherein the support frame is fixedly connected to the open end of the material box and is located above the material box, the mixing and smoothing strip is rotatably arranged in the material box along a horizontal direction and is located below the extrusion plate; the rotating transmission member is connected between the extrusion plate and the mixing and smoothing strip, comprising a take-up wheel rotatably arranged on the top of the support frame and a traction line with one end fixed on the take-up wheel and then wound several times, the other end of the traction line is connected to the top of the extrusion plate, the extrusion plate is rotatably connected to a transmission rod with one end connected to the mixing and smoothing strip, a transmission cylinder is rotatably connected to the support frame, and the other end of the transmission rod is splined to one end of the transmission cylinder, and the other end of the transmission cylinder is connected to the take-up wheel through a transmission structure; compared with the prior art, the present invention can make the lithium battery anode materials in the material box be squeezed and compacted.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery processing equipment, and in particular to equipment for producing lithium battery anode materials. Background Art

[0002] Lithium batteries are batteries that use lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution, so this type of battery is also called a lithium metal battery. Unlike other batteries, lithium batteries have the characteristics of high charging density, long life and high unit cost. Depending on the structural design and electrode materials, lithium batteries can generate a voltage of 1.5V to 3.7V.

[0003] When producing lithium batteries, traditional production equipment uses direct stamping to extrude lithium battery anode materials. The lithium battery anode materials are powder materials. During use, the lithium battery anode materials are relatively loose at the beginning. Therefore, the lithium battery anode materials that have just been extruded have a loose texture and a low density, which affects the subsequent use of the lithium battery.

[0004] A production device is now used to extrude lithium battery anode materials, including a material box and an extrusion plate arranged to slide vertically in the material box, a plurality of discharge holes are opened on the bottom wall of the material box, and each discharge hole is provided with a sealing block located outside the material box; when the extrusion plate moves a certain distance in the material box to make the lithium battery anode material in the material box relatively dense, each sealing block is moved away by a moving structure to make the discharge holes conductive for discharge; then a cutting assembly is used to cut off the lithium battery anode material discharged from each discharge hole; the continuous movement and extrusion of the extrusion plate and the continuous cutting of the cutting assembly are used to cut out dense lithium battery anode material segments for easy addition to the lithium battery shell.

[0005] When the lithium battery anode material added to the material box is unevenly distributed, and the height of the lithium battery anode material on one side of the top of the material box is significantly different from that on the other side, when the extrusion plate moves downward to extrude the lithium battery anode material, only the higher side of the material box is extruded while the lower side is not extruded. In this case, there is still a part of the lithium battery anode material with loose texture and low density, which will affect the later use of the lithium battery. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device for producing lithium battery anode materials to solve the problem in the prior art that the lithium battery anode materials are unevenly distributed after being added into the material box, resulting in the lithium battery anode materials discharged from the discharge hole being not completely dense.

[0007] To achieve the above object, the present invention adopts the following technical solution: a device for producing lithium battery anode materials, comprising a material box and an extrusion plate vertically sliding in the material box, and further comprising:

[0008] A support frame, the support frame is fixedly connected to the open end of the material box and is located above the material box;

[0009] A mixing and smoothing bar, which is arranged in the material box and is located below the extrusion plate and rotates in a horizontal direction;

[0010] A rotating transmission member is connected between the extrusion plate and the mixing and smoothing strip, and includes a take-up wheel rotatably arranged on the top of the support frame and a traction line with one end fixed on the take-up wheel and then wound several times, the other end of the traction line is connected to the top of the extrusion plate, the extrusion plate is rotatably connected to a transmission rod with one end connected to the mixing and smoothing strip, a transmission cylinder is rotatably connected to the support frame, the transmission rod and the transmission cylinder are arranged in a vertical direction, and the other end of the transmission rod is splined to one end of the transmission cylinder, and the other end of the transmission cylinder is connected to the take-up wheel through a transmission structure; the transmission structure is used to drive the transmission cylinder to rotate by the rotation of the take-up wheel.

[0011] Working principle: After adding lithium battery anode material into the material box, move the extrusion plate downward. During the movement, the extrusion plate rotates the take-up wheel through the traction line, and the take-up wheel rotates the transmission cylinder through the transmission structure; during the downward movement of the extrusion plate, the transmission rod and the mixing smoothing strip are driven to move downward. Since the transmission rod is splined to the transmission cylinder, the transmission cylinder drives the transmission rod to rotate during the rotation process, and then the mixing smoothing strip rotates in the material box during the downward movement, so as to evenly smooth the lithium battery anode material on the top of the material box; when the extrusion plate continues to move to extrude the lithium battery anode material, the end of the transmission rod connected to the transmission cylinder moves out of the transmission cylinder, and the transmission rod is disconnected from the transmission cylinder, then the transmission rod and the mixing smoothing strip continue to move with the extrusion plate and will not rotate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The power is driven by the downward movement of the extrusion plate to drive the take-up wheel to rotate through the traction line, and then the transmission is transmitted through the transmission structure, the transmission cylinder and the transmission rod, so that the mixing smoothing strip rotates in the material box, thereby evenly smoothing the lithium battery anode material on the top of the material box, so that the extrusion plate continues to move to extrude the lithium battery anode material in the material box, and the lithium battery anode material in the material box is squeezed densely; and when the extrusion plate extrude the lithium battery anode material, the transmission rod is disconnected from the transmission cylinder, and the transmission rod and the mixing smoothing strip no longer rotate, so as to avoid the transmission rod and the mixing smoothing strip rotating to increase the resistance of the extrusion plate, so that the lithium battery anode material in the material box is more labor-saving during the extrusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0015] Figure 2 for Figure 1 A front cross-sectional view of

[0016] Figure 3 for Figure 1 Partial cross-sectional view along line AA;

[0017] Figure 4 for Figure 3 A partial enlarged view of part B in the middle.

[0018] The figure marks in the drawings of the specification include: material box 1, extrusion plate 2, support frame 3, mixing smoothing strip 4, take-up wheel 5, traction line 6, transmission rod 7, transmission cylinder 8, first pulley 9, second pulley 10, belt 11, active bevel gear 12, driven bevel gear 13, discharge hole 14, accommodating chamber 15, sealing block 16, connecting strip 17, first connecting rod 18, second connecting rod 19, driving block 20, adjusting block 21, "U"-shaped block 201, movable protrusion 202, elastic reset member 22, guide rod 23. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below through specific embodiments:

[0020] like Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a device for producing anode materials for lithium batteries, comprising a material box 1, an extrusion plate 2 vertically sliding in the material box 1, a support frame 3, a mixing smoothing strip 4 and a rotating transmission member, wherein the support frame 3 is fixedly connected to the open end of the material box 1 and is located above the material box 1, and the mixing smoothing strip 4 is rotatably arranged in the material box 1 along the horizontal direction and is located below the extrusion plate 2; the rotating transmission member is connected between the extrusion plate 2 and the mixing smoothing strip 4, and comprises a take-up wheel 5 rotatably arranged on the top of the support frame 3 and a traction line 6 with one end fixed on the take-up wheel 5 and then wound several times, the other end of the traction line 6 is connected to the top of the extrusion plate 2, the extrusion plate is rotatably connected to a transmission rod 7 with one end connected to the mixing smoothing strip 4, and a transmission cylinder 8 is rotatably connected to the support frame 3, the transmission rod 7 and the transmission cylinder 8 are both arranged in the vertical direction, and the other end of the transmission rod 7 is splined to one end of the transmission cylinder 8, and the other end of the transmission cylinder 8 is connected to the take-up wheel 5 through a transmission structure; the transmission structure is used to drive the transmission cylinder 8 to rotate by the rotation of the take-up wheel 5.

[0021] Working principle: After adding the lithium battery anode material into the material box 1, the extrusion plate 2 is moved downward. During the movement, the extrusion plate 2 rotates the take-up wheel 5 through the traction line 6, and the take-up wheel 5 rotates the transmission cylinder 8 through the transmission structure; during the downward movement of the extrusion plate 2, the transmission rod 7 and the mixing smoothing strip 4 are driven to move downward. Since the transmission rod 7 is splined to the transmission cylinder 8, the transmission cylinder 8 drives the transmission rod 7 to rotate during the rotation process, and then the mixing smoothing strip 4 is still rotated in the material box 1 during the downward movement, so as to evenly smooth the lithium battery anode material on the top of the material box 1; when the extrusion plate 2 continues to move to extrude the lithium battery anode material, the end of the transmission rod 7 connected to the transmission cylinder 8 moves out of the transmission cylinder 8, and the transmission rod 7 is disconnected from the transmission cylinder 8, then the transmission rod 7 and the mixing smoothing strip 4 continue to move with the extrusion plate 2 and will not rotate.

[0022] The power is generated by the downward movement of the extrusion plate 2 to drive the take-up wheel 5 to rotate through the traction line 6, and then the transmission is transmitted through the transmission structure, the transmission cylinder 8 and the transmission rod 7, so that the mixing smoothing strip 4 rotates in the material box 1, thereby evenly smoothing the lithium battery anode material on the top of the material box 1, so that the extrusion plate 2 continues to move to extrude the lithium battery anode material in the material box 1, and the lithium battery anode material in the material box 1 is squeezed densely; and when the extrusion plate 2 extrude the lithium battery anode material, the transmission rod 7 is disconnected from the transmission cylinder 8, and the transmission rod 7 and the mixing smoothing strip 4 no longer rotate, so as to avoid the transmission rod 7 and the mixing smoothing strip 4 rotating to increase the resistance of the extrusion plate 2, so that the lithium battery anode material in the material box 1 is more labor-saving during the extrusion process.

[0023] In this embodiment, the support frame 3 is a "U"-shaped frame, and both ends of the "U"-shaped frame are fixedly connected to the outer wall of the material box 1, specifically by welding or bolting; a hole is opened on the "U"-shaped frame for the traction line 6 to pass freely, and at least one cylinder connected to the extrusion plate 2 is fixedly installed on the "U"-shaped frame, and the cylinder is used to provide power for the movement of the extrusion plate 2; the specific number of cylinders used is two, which are distributed on different sides of the transmission cylinder 8; a first annular limit block rotatably arranged in the extrusion plate 2 is integrally formed on the outer wall of the transmission rod 7, and a second annular limit block rotatably arranged in the "U"-shaped frame is integrally formed on the outer wall of the transmission cylinder 8, so that the connection between the transmission rod 7 and the extrusion plate 2 and the connection between the transmission cylinder 8 and the "U"-shaped frame are very stable; and a coil spring can be installed on the rotating shaft of the take-up wheel 5, and when the extrusion plate 2 moves upward, the coil spring causes the take-up wheel 5 to rotate in the opposite direction to reel in the traction line 6.

[0024] like Figure 1 and Figure 2As shown, according to another embodiment of the present invention, a device for producing lithium battery anode materials, wherein the transmission structure includes a first pulley 9 coaxially connected to the take-up wheel 5 and a second pulley 10 rotatably arranged on the top of the support frame 3, the first pulley 9 and the second pulley 10 are connected to each other through a belt 11, and the second pulley 10 is coaxially connected to an active bevel gear 12, the active bevel gear 12 is meshed with a driven bevel gear 13, and the driven bevel gear 13 is fixedly connected to one end of the transmission cylinder 8.

[0025] In this embodiment, when the take-up wheel 5 is rotating, the first pulley 9 rotates synchronously therewith, and the second pulley 10 is rotated through the belt 11, and then the transmission is transmitted in sequence through the active bevel gear 12 and the driven bevel gear 13 to rotate the transmission cylinder 8; when the transmission rod 7 is in a connected state with the transmission cylinder 8, the transmission rod 7 rotates with the transmission cylinder 8 to drive the mixing smoothing strip 4 to rotate on the top side of the material box 1, so as to smooth the lithium battery anode material on the top of the material box 1.

[0026] like Figure 2 , Figure 3 and Figure 4 As shown, according to another embodiment of the present invention, the equipment for producing lithium battery anode materials also includes a plurality of discharge holes 14 at the bottom of the material box 1, and a accommodating cavity 15 is opened on the inner wall of the discharge side of each discharge hole 14, and a sealing block 16 is slidably arranged in each discharge hole 14 between it and the corresponding accommodating cavity 15, and a connecting strip 17 connected to each sealing block 16 is arranged on the outside of the material box 1, and a horizontal moving component is connected between the connecting strip 17 and the extrusion plate 2; the extrusion plate moves through the horizontal moving component to move the connecting strip 17 a certain distance away from or close to the material box 1, and each sealing block 16 is controlled to slide into the corresponding accommodating cavity 15 or the corresponding discharge hole 14.

[0027] In this embodiment, when the extrusion plate moves downward for a certain distance and the lithium battery anode material in the material box 1 has a certain density, the extrusion plate moves the connecting strip 17 a certain distance away from the material box 1 through the horizontal moving assembly, so that each sealing block 16 slides from the corresponding discharge hole 14 to the corresponding accommodating cavity 15, and the discharge holes 14 are all opened. The extrusion plate continues to move downward, and the lithium battery anode material is discharged from each discharge hole 14; then the extrusion plate moves in the opposite direction for a certain distance, and the connecting strip 17 moves a certain distance toward the material box 1 through the horizontal moving assembly, and then each sealing block 16 slides from the corresponding accommodating cavity 15 to the corresponding discharge hole 14, and the lithium battery anode material in each discharge hole 14 is cut; the extrusion plate continues to move downward to repeat the above actions to continuously extrude, discharge and cut the lithium battery anode material; in this embodiment, the sealing block 16 not only seals the discharge hole 14, but also cuts the lithium battery anode material discharged from the discharge hole 14, reducing the use of the original cutting assembly and reducing the equipment cost;

[0028] Specifically, the plurality of discharge holes 14 used in the present invention are arranged in a rectangular array, and two adjacent sealing blocks 16 in the same column are connected by a first connecting rod 18 that is slidably penetrated in the bottom wall of the material box 1, and the sealing blocks 16 at the same end in each column are connected to the connecting strip 17 through a second connecting rod 19, and the second connecting rod 19 is freely slidably arranged in the bottom wall of the material box 1.

[0029] In this embodiment, a plurality of second connecting rods 19 and a plurality of first connecting rods 18 are used to connect a plurality of sealing blocks 16 and a connecting strip 17 into a whole. When the connecting strip 17 moves, the sealing blocks 16 move accordingly, so that the plurality of sealing blocks 16 can be quickly moved between their respective corresponding discharge holes 14 and accommodating cavities 15 to make the discharge holes 14 conductive for discharge, or the discharge holes 14 are sealed to cut the lithium battery anode material or the extrusion plate 2 to extrude the lithium battery anode material.

[0030] Due to the presence of the mixing smoothing strip 4, the lithium battery anode material in the material box 1 cannot be completely discharged, and there will be a small amount of residue; when the lithium battery anode material in the material box 1 is almost discharged, the extrusion plate 2 moves upward, and after the extrusion plate 2 moves a certain distance, the transmission rod 7 is adjusted to align the transmission rod 7 with the transmission cylinder 8, and the extrusion plate 2 continues to move upward, and one end of the transmission rod 7 moves into the transmission cylinder 8 to perform spline connection again; when the extrusion plate 2 moves upward to the opening at the top of the material box 1, an appropriate amount of lithium battery anode material can continue to be added to the material box 1, and then the next work can be carried out.

[0031] like Figure 1 , Figure 3 and Figure 4As shown, according to another embodiment of the present invention, a device for producing lithium battery anode materials, wherein the horizontal moving component includes a plurality of driving blocks 20 connected to the extrusion plate 2 and a plurality of adjusting blocks 21 connected to the connecting bar 17, the plurality of adjusting blocks 21 are all connected to the connecting bar 17, and each adjusting block 21 is connected to the outer wall of the material box 1 through a plurality of elastic reset members 22, and the plurality of adjusting blocks 21 are matched with the plurality of driving blocks 20 in a one-to-one correspondence; after the plurality of driving blocks 20 move downward a certain distance with the extrusion plate 2, they are counteracted with the corresponding adjusting blocks 21, so that the adjusting blocks 21 are all moved a certain distance away from the material box 1.

[0032] In this embodiment, when the extrusion plate moves downward, the plurality of driving blocks 20 move synchronously with the extrusion plate. After moving a certain distance, the plurality of driving blocks 20 and the plurality of adjusting blocks 21 are matched one by one to make the adjusting blocks 21 move a certain distance away from the material box 1, so that the connecting strip 17 moves a certain distance away from the material box 1, and is driven by the second connecting rod 19 and the first connecting rod 18. Each sealing block 16 slides from the corresponding discharge hole 14 to the corresponding accommodating cavity 15, and the discharge holes 14 are opened. The extrusion plate continues to move downward, and the lithium battery anode material is discharged from each discharge hole 14 for a distance; then the extrusion plate moves upward for a certain distance, and the driving blocks 20 are The adjusting block 21 is disengaged from the adjusting block 21, and under the elastic restoring force of the plurality of elastic restoring members 22, the adjusting block 21 is moved toward the material box 1 until it returns to its original position, thereby making the connecting strip 17 move toward the material box 1 until it returns to its original position. Then, each sealing block 16 slides from the corresponding accommodating cavity 15 to the corresponding discharge hole 14, and the lithium battery anode material in each discharge hole 14 is cut into sections by the corresponding sealing block 16, so that the cut lithium battery anode material falls from the corresponding discharge hole 14 and enters the lithium battery shell; the extrusion plate continues to move downward to repeat the above-mentioned actions, so as to continuously extrude, discharge and cut the lithium battery anode material.

[0033] Specifically, each driving block 20 used includes a "U"-shaped block 201, one end of the "U"-shaped block 201 is connected to the bottom of the extrusion plate 2, and the other end is slidably attached to the outer wall of the material box 1, and a movable protrusion 202 is formed at the end of the "U"-shaped block 201 away from the extrusion plate, and the movable protrusion 202 is located on the side wall of the "U"-shaped block 201 away from the material box 1, and the adjustment blocks 21 are all located on the corresponding moving path of the "U"-shaped block 201, and the distance between the adjustment block 21 and the outer wall of the material box 1 is equal to the thickness of one end of the "U"-shaped block 201.

[0034] In the present embodiment, the shape and structure design of the driving block 20 is convenient for its reasonable installation to move synchronously with the extrusion plate 2; when the driving block 20 moves downward for a certain distance, one end of the "U"-shaped block 201 with the moving protrusion 202 is just inserted between the adjusting block 21 and the material box 1, and the driving block 20 continues to move downward, and the adjusting block 21 and the moving protrusion 202 slide against each other to move the adjusting block 21 away from the material box 1, so that each sealing block 16 slides from the corresponding discharge hole 14 to the corresponding accommodating cavity 15; the moving protrusion 202 is a smooth arc-shaped protrusion, so that it cooperates with the adjusting block 21 to make each sealing block 16 slide between the corresponding discharge hole 14 and the accommodating cavity 15; when the driving block 20 moves upward for a certain distance with the extrusion plate 2, the driving block 20 is disengaged from the adjusting block 21, and the elastic reset force of the elastic reset member 22 causes the adjusting block 21 to move toward the material box 1, and each sealing block 16 slides from the corresponding accommodating cavity 15 to the corresponding discharge hole 14.

[0035] In this embodiment, the specific elastic reset member 22 can be a spring. There are two springs connected between each adjustment block 21 and the material box 1 , and there are two adjustment blocks 21 and two driving blocks 20 .

[0036] like Figure 1 and Figure 3 As shown, according to another embodiment of the present invention, a device for producing lithium battery anode materials, wherein each of the adjustment blocks 21 is equipped with a guide rod 23 fixedly connected to the outer wall of the material box 1, and the guide rods 23 are horizontally arranged and freely pass through the corresponding adjustment block 21.

[0037] The movement of the adjusting block 21 is guided by the guide rod 23 , so that the movement of the adjusting block 21 is more stable.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A device for producing lithium battery anode materials, comprising a material box and an extrusion plate vertically sliding in the material box, characterized in that: Also includes: A support frame, the support frame is fixedly connected to the open end of the material box and is located above the material box; A mixing and smoothing bar, which is arranged in the material box and is located below the extrusion plate and rotates in a horizontal direction; A rotating transmission member, the rotating transmission member is connected between the extrusion plate and the mixing and smoothing strip and is located above the extrusion plate, including a take-up wheel rotatably arranged on the top of the support frame and a traction line with one end fixed on the take-up wheel and then wound several times, the other end of the traction line is connected to the top of the extrusion plate, the extrusion plate is rotatably connected to a transmission rod with one end connected to the mixing and smoothing strip, a transmission cylinder is rotatably connected to the support frame, the transmission rod and the transmission cylinder are both arranged in the vertical direction, and the other end of the transmission rod is splined to one end of the transmission cylinder, and the other end of the transmission cylinder is connected to the take-up wheel through a transmission structure; the transmission structure is used to drive the transmission cylinder to rotate by the rotation of the take-up wheel; It also includes a plurality of discharge holes provided at the bottom of the material box, each of which has a receiving cavity provided on the inner wall of the discharge side, a sealing block slidably provided in each discharge hole between the sealing block and the corresponding receiving cavity, a connecting strip connected to each sealing block is provided on the outer side of the material box, and a horizontal moving assembly is connected between the connecting strip and the extrusion plate; the extrusion plate moves through the horizontal moving assembly to move the connecting strip a certain distance away from or close to the material box, thereby controlling each sealing block to slide into the corresponding receiving cavity or the corresponding discharge hole; The end of the sealing block forms a tip through arranged bevels.

2. The device for producing anode materials for lithium batteries according to claim 1, characterized in that: The transmission structure includes a first pulley coaxially connected to the take-up wheel and a second pulley rotatably arranged on the top of the support frame. The first pulley and the second pulley are connected by a belt transmission, and the second pulley is coaxially connected to a driving bevel gear, the driving bevel gear is meshed with a driven bevel gear, and the driven bevel gear is fixedly connected to one end of the transmission cylinder.

3. The device for producing anode materials for lithium batteries according to claim 1, characterized in that: The discharge holes are arranged in a rectangular array, and two adjacent sealing blocks in the same column are connected by a first connecting rod that is slidably inserted into the bottom wall of the material box. The sealing blocks at the same end of each column are connected to the connecting strip through a second connecting rod, and the second connecting rod is freely slidably arranged in the bottom wall of the material box.

4. The equipment for producing anode materials for lithium batteries according to claim 1, characterized in that: The horizontal moving assembly includes multiple driving blocks connected to the extrusion plate and multiple adjusting blocks connected to the connecting strip, the multiple adjusting blocks are all connected to the connecting strip, and each adjusting block is connected to the outer wall of the material box through multiple elastic reset parts, and the multiple adjusting blocks are matched with the multiple driving blocks in a one-to-one correspondence; after the multiple driving blocks move downward a certain distance with the extrusion plate, they are abutted against the corresponding adjusting blocks, so that the adjusting blocks are all moved a certain distance away from the material box.

5. The device for producing anode materials for lithium batteries according to claim 4, characterized in that: Each of the driving blocks includes a "U"-shaped block, one end of the "U"-shaped block is connected to the bottom of the extrusion plate, and the other end is slidably attached to the outer wall of the material box, and a movable protrusion is formed at the end of the "U"-shaped block away from the extrusion plate, and the movable protrusion is located on the side wall of the "U"-shaped block away from the material box. The adjustment blocks are all located on the corresponding "U"-shaped block moving path, and the distance between the adjustment block and the outer wall of the material box is equal to the thickness of one end of the "U"-shaped block.

6. The device for producing anode materials for lithium batteries according to claim 5, characterized in that: Each of the adjusting blocks is matched with a guide rod fixedly connected to the outer wall of the material box, and the guide rods are arranged horizontally and freely pass through the corresponding adjusting block.

Images