Preparation device of lithium ion battery positive electrode material

Abstract

The invention discloses a lithium ion battery positive electrode material preparation device which comprises a magnetic stirrer, a mixing assembly is arranged at the top end of the magnetic stirrer and comprises a supporting table connected with the top end of the magnetic stirrer, an empty window is formed in the top of the supporting table, a clamp is arranged in the empty window, and a mixing pipe is clamped on the clamp. The two sides of the clamp are connected with connecting arms through rotary drums, the two connecting arms are connected through a fixing ring, a transmitter is arranged on the side, close to the mixing pipe, of the fixing ring, and the transmitter transmits optical signals; the mixing assembly arranged in the device can automatically detect and control the dripping amount of a glue solution, the dripping efficiency is improved as much as possible while the dripping amount of the glue solution is accurately controlled, a powdery material needed for preparing a battery is added into the mixing pipe firstly, and after the powdery material is added, the mixing pipe is clamped into a clamp in an empty window at the top of the supporting table; a sensor is arranged in the induction groove to reflect the flowability of the slurry, so that the mixing efficiency is improved while the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery preparation, and more specifically, to a preparation device for a cathode material of a lithium-ion battery. Background Art

[0002] Lithium batteries are a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium metal batteries generally use manganese dioxide as the positive electrode material and metallic lithium or its alloy as the negative electrode material; lithium-ion batteries generally use lithium alloy metal oxide as the positive electrode material and graphite as the negative electrode material.

[0003] However, in the existing preparation device, it is inconvenient to control the dropping amount in the step of dropping the sizing agent during the preparation of the cathode material. It is necessary to manually observe the fluidity of the slurry after dropping the sizing agent. On the one hand, it is not easy to control the dropping amount of the sizing agent, which ultimately affects the fluidity of the slurry. On the other hand, it will cause the dropping process time to be prolonged, affecting the material preparation efficiency. Summary of the Invention

[0004] The present invention provides a preparation device for a cathode material of a lithium-ion battery to solve the problem that in the existing preparation device, it is inconvenient to control the dropping amount in the step of dropping the sizing agent during the preparation of the cathode material, and it is necessary to manually observe the fluidity of the slurry after dropping the sizing agent, affecting the material preparation efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A preparation device for a cathode material of a lithium-ion battery includes a magnetic stirrer. A mixing assembly is provided at the top of the magnetic stirrer. The mixing assembly includes a support platform connected to the top of the magnetic stirrer. An empty window is provided at the top of the support platform. A clamp is provided in the empty window. A mixing tube is clamped on the clamp. Both sides of the clamp are connected to connecting arms through rotating cylinders. The two connecting arms are connected through a fixing ring. A signal transmitter is provided on one side of the fixing ring close to the mixing tube. The signal type emitted by the signal transmitter is an optical signal.

[0007] Preferably, a dovetail groove is provided inside the clamp. A dovetail block is slidably clamped in the dovetail groove. A vertical plate is connected to one side of the dovetail block. An induction groove is provided on the side of the vertical plate close to the mixing tube. An optical signal sensor is provided in the induction groove.

[0008] Preferably, the bottom end of the vertical plate is rotatably connected to a bracket. The top surface of the bracket contacts the outer bottom wall of the mixing tube. A control assembly is provided at one end of the bracket.

[0009] Preferably, the control component includes a pair of side grooves opened at the top end of the vertical plate. In each of the two side grooves, an inclined block is slidably clamped. The bottom end of the inclined block is connected to a connecting rod, and the connecting rod is slidably clamped in a longitudinal groove opened inside the clamp. The bottom end of the connecting rod is connected to a stopper. One end of the bracket is provided with a pair of limiting blocks, and the two stoppers respectively block the tops of the two limiting blocks.

[0010] Preferably, the two inclined blocks are connected by a spring. The inclined surfaces of the two inclined blocks face away from each other, and the inclined blocks are wider at the top and narrower at the bottom.

[0011] Preferably, limiting plates are arranged on both sides of the bracket. The limiting plates are made of an elastic material. The opposite sides of the two limiting plates are both in contact with the outer wall of the mixing pipe. The inside of the limiting plate is a curved surface, and the radian of the curved surface is the same as the radian of the outer wall of the mixing pipe.

[0012] Preferably, a receiving groove is opened at the top end of the support platform. The fixing ring and the connecting arm are placed in the receiving groove. The free end of the rotating cylinder is coaxially connected to a torsion spring, and the free end of the torsion spring is connected to the inner walls at both ends of the receiving groove.

[0013] Preferably, a rotating rod is rotatably connected to the top end of the support platform. A clamping block is arranged at one end of the rotating rod close to the mixing pipe. The free end of the rotating rod is coaxially connected to a knob. A notch is opened on the outer side of the fixing ring, and the clamping block is rotatably clamped in the fixing ring. The width of the notch is equal to the width of the clamping block.

[0014] Preferably, a side plate is arranged at one end of the connecting arm away from the rotating cylinder. A pull rope is connected to one side of the two side plates. A guide wheel set and a limiting wheel are arranged at the top end of the support platform. The pull rope is clamped outside the guide wheel set and the limiting wheel. The free ends of the two pull ropes are jointly connected to a pull plate. A cross beam is arranged outside the support platform, and a telescopic rod is connected to the top end of the cross beam. The output rod end of the telescopic rod is connected to the pull plate.

[0015] Preferably, a bracket is arranged at the top end of the support platform. A dropper is connected to the free end of the bracket, and the opening of the dropper is aligned with the top opening of the mixing pipe in the vertical direction.

[0016] The principle and beneficial effects of this technical solution:

[0017] (1) The mixing component provided in the present invention can automatically detect and control the amount of glue dropped, accurately control the amount of glue dropped while improving the dropping efficiency as much as possible. First, add the powdery materials required for preparing the battery into the mixing tube. After the addition of the powdery materials is completed, the mixing tube is clamped into the clip in the empty window at the top of the support platform. At this time, the clip is in the vertical direction. The glue is dropped into the mixing tube through a dropper. When the dropped amount of glue reaches the minimum theoretical value, first slide the vertical plate where the dovetail block is located along the dovetail groove opened on the inner side of the clip to change the height of the bracket rotatably connected to the bottom end of the vertical plate. Since the top surface of the bracket contacts the outer wall of the bottom of the mixing tube, the mixing tube will move synchronously when the bracket moves. Then, drive the telescopic rod fixed by a cross beam on the outside of the support platform to shorten, and record the time for the mixed slurry to flow horizontally by 5 mm according to the photosensitive result of the sensor set in the induction groove to reflect the fluidity of the slurry. When the fluidity of the slurry is insufficient, reset the mixing tube and drop a small amount of glue again. Repeat the above steps until the fluidity of the slurry meets the requirements, and then the slurry mixing operation can be carried out.

[0018] (2) The control component provided in the present invention can greatly shorten the moving distance when the mixing tube is transferred to the magnetic stirrer. When the slurry mixing operation needs to be carried out, directly slide the vertical plate downward until the vertical plate slides to the lowest position. The mixing tube held by the top of the bracket will move downward synchronously. At the same time, the inclined blocks slidably clamped through the side grooves on both sides of the vertical plate will squeeze against the inner wall of the clip, compressing the spring. At the same time, the connecting rod connected to the bottom end of the inclined block will slide horizontally along the longitudinal groove and drive the stopper to move horizontally until the stopper is misaligned with the limit block provided at one end of the bracket. At this time, the rotation limit of the bracket is released. Under the gravity of the mixing tube, the bracket will rotate to the vertical direction. At the same time, the limit plates provided on both sides of the bracket will be clamped to the outer wall of the mixing tube, and the mixing tube will be clamped through the curved surface provided inside the limit plate. The mixing tube will fall into the stirring groove on the magnetic stirrer, and starting the magnetic stirrer can mix the slurry in the mixing tube. Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the present invention;

[0020] Figure 2 is the structural schematic diagram after the present invention is disassembled;

[0021] Figure 3 is Figure 2 the enlarged structural schematic diagram of area A in

[0022] Figure 4 is Figure 2 the enlarged structural schematic diagram of area B in

[0023] Figure 5 is Figure 2 the enlarged structural schematic diagram of area C in

[0024] Figure 6Structural schematic diagram of some components of the present invention after sectioning;

[0025] The reference numerals in the accompanying drawings of the specification include: 1, support platform; 2, magnetic stirrer; 3, guide wheel set; 4, limiting wheel; 5, induction groove; 6, mixing tube; 7, pulling plate; 8, telescopic rod; 9, cross beam; 10, inclined block; 11, connecting rod; 12, bracket; 13, stop block; 14, dropper; 15, dovetail block; 16, side groove; 17, storage groove; 18, clamping block; 19, rotating rod; 20, knob; 21, limiting plate; 22, limiting block; 23, bracket; 24, rotating cylinder; 25, connecting arm; 26, fixing ring; 27, transmitter; 28, notch; 29, side plate; 30, clamp; 31, dovetail groove; 32, longitudinal groove; 33, pulling rope; 34, torsion spring; 35, empty window; 36, vertical plate. Detailed implementation mode

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and implementation modes:

[0027] Embodiment:

[0028] As Figures 1 to 6 shown, the present invention provides a preparation device for a cathode material of a lithium-ion battery, including a magnetic stirrer 2. A mixing assembly is arranged at the top of the magnetic stirrer 2. The mixing assembly includes a support platform 1 connected to the top of the magnetic stirrer 2. An empty window 35 is formed at the top of the support platform 1. A clamp 30 is arranged in the empty window 35. A mixing tube 6 is clamped on the clamp 30. Both sides of the clamp 30 are connected with connecting arms 25 through rotating cylinders 24. The two connecting arms 25 are connected through a fixing ring 26. A transmitter 27 is arranged on one side of the fixing ring 26 close to the mixing tube 6. The signal type emitted by the transmitter 27 is an optical signal.

[0029] As Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, a dovetail groove 31 is formed on the inner side of the clamp 30. A dovetail block 15 is slidably clamped in the dovetail groove 31. A vertical plate 36 is connected to one side of the dovetail block 15. An induction groove 5 is formed on the side of the vertical plate 36 close to the mixing tube 6. An optical signal sensor is arranged in the induction groove 5.

[0030] As Figure 2 , Figure 4 and Figure 6 shown, the bottom end of the vertical plate 36 is rotatably connected to a bracket 23. The top surface of the bracket 23 is in contact with the outer bottom wall of the mixing tube 6. A control assembly is arranged at one end of the bracket 23.

[0031] As Figures 3 to 5As shown, the control component includes a pair of side grooves 16 opened at the top of the vertical plate 36. In both of the two side grooves 16, an inclined block 10 is slidably clamped. The bottom end of the inclined block 10 is connected to a connecting rod 11, and the connecting rod 11 is slidably clamped in a longitudinal groove 32 opened inside the clamping clip 30. The bottom end of the connecting rod 11 is connected to a stop block 13. One end of the bracket 23 is provided with a pair of limiting blocks 22, and the two stop blocks 13 are respectively blocked on the tops of the two limiting blocks 23.

[0032] As Figure 3 shown, the two inclined blocks 10 are connected by a spring. The inclined surfaces of the two inclined blocks 10 face away from each other, and the inclined blocks 10 are wider at the top and narrower at the bottom.

[0033] As Figure 2 and Figure 4 shown, limiting plates 21 are arranged on both sides of the bracket 23. The limiting plates 21 are made of an elastic material. The opposite sides of the two limiting plates 21 are both in contact with the outer wall of the mixing tube 6. The inside of the limiting plate 21 is a curved surface, and the radian of the curved surface is the same as the radian of the outer wall of the mixing tube 6.

[0034] The control component can greatly shorten the moving distance when the mixing tube 6 is transferred to the magnetic stirrer 2. When the slurry mixing operation needs to be carried out, directly slide the vertical plate downward so that the vertical plate slides to the lowest position. The mixing tube 6 lifted by the top of the bracket 23 will move downward synchronously. At the same time, the inclined blocks 10 slidably clamped in the side grooves 16 on both sides of the vertical plate will be squeezed against the inner wall of the clamping clip 30, compressing the spring. At the same time, the connecting rod 11 connected to the bottom end of the inclined block 10 will slide horizontally along the longitudinal groove 32 and drive the stop block 13 to move horizontally until the stop block 13 is misaligned with the limiting block 22 arranged at one end of the bracket 23. At this time, the rotation limit of the bracket 23 is released. Under the gravity of the mixing tube 6, the bracket 23 will rotate to the vertical direction. At the same time, the limiting plates 21 arranged on both sides of the bracket 23 will be clamped to the outer wall of the mixing tube 6, and the mixing tube 6 will be clamped by the curved surface arranged inside the limiting plate 21. The mixing tube 6 will fall into the stirring tank on the magnetic stirrer 2, and starting the magnetic stirrer 2 can mix the slurry in the mixing tube 6.

[0035] As Figure 1 、 Figure 4 and Figure 5 shown, a receiving groove 17 is opened at the top of the support platform 1. The fixed ring 26 and the connecting arm 25 are placed in the receiving groove 17. The free end of the rotating cylinder 24 is coaxially connected to a torsion spring 34, and the free end of the torsion spring 34 is connected to the inner walls of both ends of the receiving groove 17.

[0036] As Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, a rotating rod 19 is rotatably connected to the top of the support platform 1, a clamping block 18 is provided at one end of the rotating rod 19 close to the mixing tube 6, a knob 20 is coaxially connected to the free end of the rotating rod 19, a notch 28 is provided on the outer side of the fixing ring 26, the clamping block 18 is rotatably clamped in the fixing ring 26, and the width of the notch 28 is equal to the width of the clamping block 18.

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, a side plate 29 is provided at one end of the connecting arm 25 away from the rotating drum 24, and a pull rope 33 is connected to one side of the two side plates 29. A guide wheel group 3 and a limiting wheel 4 are provided at the top of the support platform 1. The pull rope 33 is clamped on the outside of the guide wheel group 3 and the limiting wheel 4. The free ends of the two pull ropes 33 are commonly connected to a pull plate 7. A cross beam 9 is provided on the outside of the support platform 1. A telescopic rod 8 is connected to the top of the cross beam 9, and the output rod end of the telescopic rod 8 is connected to the pull plate 7.

[0038] like Figures 1 to 3 As shown, a bracket 12 is provided at the top of the support platform 1, and a dropper 14 is connected to the free end of the bracket 1. The opening of the dropper 14 is aligned with the top opening of the mixing tube 6 in the vertical direction.

[0039] The specific usage and function of this embodiment are as follows:

[0040] The mixing assembly provided in the present invention can automatically detect and control the amount of glue dripped in, accurately control the amount of glue dripped in and improve the dripping efficiency as much as possible. First, add the powdered material required for preparing the battery into the mixing tube 6. After the powdered material is added, the mixing tube 6 is clamped into the clamp 30 in the empty window 35 on the top of the support platform 1. At this time, the clamp 30 is in the vertical direction, and the glue is dripped into the mixing tube 6 through the dropper 14. When the amount of glue dripped reaches the minimum theoretical value, first slide the vertical plate where the dovetail block 15 is located along the dovetail groove 31 opened on the inner side of the clamp 30 to change the height of the bracket 23 rotatably connected to the bottom end of the vertical plate. Since the top surface of the bracket 23 is in contact with the outer side of the bottom wall of the mixing tube 6, the mixing tube 6 will move synchronously when the bracket 23 moves. When the slurry height in the mixing tube 6 is equivalent to the height of the transmitter 27 connected between the connecting arm 25 through the fixing ring 26, the vertical plate is further moved down by 5mm;

[0041] After the above preparations are completed, turn the knob 20 provided at the top of the support platform 1, so that the clamping block 18 coaxially connected by the knob 20 through the rotating rod 19 rotates to the vertical direction, and the notch 28 opened on the outer side of the fixed ring 26 is kept in the same direction as the clamping block 18. Then, the telescopic rod 8 fixed to the outside of the support platform 1 through the cross beam 9 can be driven to shorten. The pulling plate 7 connected to the output end of the telescopic rod 8 will then pull down two pulling ropes 33, causing the pulling ropes 33 to move along the outer sides of the guide wheel group 3 and the limiting wheel 4. At the same time, the rotating cylinder 24 where the side plate 29 is located is rotated along the top of the support platform 1 by pulling the pulling ropes 33. Since the torsion spring 34 connected to one end of the rotating cylinder 24 is arranged at both ends of the storage groove 17 at the top of the support platform 1, the connecting arm 25 connected to the outside of the rotating cylinder 24 will rotate upward during the pulling process of the pulling ropes 33, and at the same time, the torsion spring 34 will be compressed until the clamping clip 30 connected to the rotating cylinder 24 drives the mixing pipe 6 to tilt to the horizontal direction. While driving the telescopic rod 8 to shorten, the signal transmitter 27 is turned on and timed. The time for the mixed slurry to flow horizontally by 5 mm is recorded according to the photosensitive result of the sensor arranged in the induction groove 5 to reflect the fluidity of the slurry. When the fluidity of the slurry is insufficient, the mixing pipe 6 is reset and a small amount of glue is dripped again. Repeat the above steps until the fluidity of the slurry meets the requirements, and then the slurry mixing operation can be carried out.

[0042] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A device for preparing positive electrode materials for lithium-ion batteries, characterized in that: The invention comprises a magnetic stirrer (2), wherein a mixing assembly is arranged at the top of the magnetic stirrer (2), wherein the mixing assembly comprises a support platform (1) connected to the top of the magnetic stirrer (2), wherein a hollow window (35) is provided at the top of the support platform (1), wherein a clamp (30) is arranged in the hollow window (35), wherein a mixing tube (6) is clamped on the clamp (30), wherein both sides of the clamp (30) are connected to connecting arms (25) via a rotating drum (24), wherein the two connecting arms (25) are connected via a fixing ring (26), wherein a transmitter (27) is arranged on the side of the fixing ring (26) close to the mixing tube (6), wherein the type of signal emitted by the transmitter (27) is an optical signal.

2. The device for preparing a positive electrode material for a lithium-ion battery according to claim 1, characterized in that: A dovetail groove (31) is provided on the inner side of the clamp (30), a dovetail block (15) is slidably clamped in the dovetail groove (31), a vertical plate (36) is connected to one side of the dovetail block (15), a sensing groove (5) is provided on the side of the vertical plate (36) close to the mixing tube (6), and a light signal sensor is arranged in the sensing groove (5).

3. The device for preparing a positive electrode material for a lithium-ion battery according to claim 2, characterized in that: The bottom end of the vertical plate (36) is rotatably connected to a bracket (23), the top surface of the bracket (23) is in contact with the outer side of the bottom wall of the mixing tube (6), and a control component is arranged at one end of the bracket (23).

4. The device for preparing a positive electrode material for a lithium-ion battery according to claim 3, characterized in that: The control assembly comprises a pair of side grooves (16) provided at the top of the vertical plate (36), an inclined block (10) being slidably mounted in the two side grooves (16), a connecting rod (11) being connected to the bottom end of the inclined block (10), the connecting rod (11) being slidably mounted in a longitudinal groove (32) provided on the inner side of the clamp (30), a stopper (13) being connected to the bottom end of the connecting rod (11), a pair of limit blocks (22) being provided at one end of the bracket (23), the two stoppers (13) being respectively blocked at the top ends of the two limit blocks (23).

5. The device for preparing a positive electrode material for a lithium-ion battery according to claim 4, characterized in that: The two inclined blocks (10) are connected via a spring, the inclined surfaces of the two inclined blocks (10) are arranged opposite to each other, and the inclined blocks (10) are wider at the top and narrower at the bottom.

6. The device for preparing a positive electrode material for a lithium-ion battery according to claim 5, characterized in that: Limiting plates (21) are provided on both sides of the bracket (23), the limiting plates (21) are made of elastic material, the opposite sides of the two limiting plates (21) are in contact with the outer wall of the mixing tube (6), the interior of the limiting plates (21) is a curved surface, and the curvature of the curved surface is the same as the curvature of the outer wall of the mixing tube (6).

7. The device for preparing a positive electrode material for a lithium-ion battery according to claim 6, characterized in that: The top of the support platform (1) is provided with a receiving groove (17), the fixing ring (26) and the connecting arm (25) are arranged in the receiving groove (17), the free end of the rotating cylinder (24) is coaxially connected with a torsion spring (34), and the free end of the torsion spring (34) is connected to the inner walls at both ends of the receiving groove (17).

8. The device for preparing a positive electrode material for a lithium-ion battery according to claim 7, characterized in that: The top end of the support platform (1) is rotatably connected to a rotating rod (19), a clamping block (18) is provided at one end of the rotating rod (19) close to the mixing tube (6), a knob (20) is coaxially connected to the free end of the rotating rod (19), a notch (28) is provided on the outside of the fixing ring (26), the clamping block (18) is rotatably clamped in the fixing ring (26), and the width of the notch (28) is equal to the width of the clamping block (18).

9. The device for preparing a positive electrode material for a lithium-ion battery according to claim 8, characterized in that: A side plate (29) is provided at one end of the connecting arm (25) away from the rotating drum (24), and one side of the two side plates (29) is connected with a pull rope (33). A guide wheel group (3) and a limit wheel (4) are provided at the top of the support platform (1), and the pull rope (33) is clamped on the outside of the guide wheel group (3) and the limit wheel (4). The free ends of the two pull ropes (33) are commonly connected to a pull plate (7). A cross beam (9) is provided on the outside of the support platform (1), and a telescopic rod (8) is connected to the top of the cross beam (9), and the output rod end of the telescopic rod (8) is connected to the pull plate (7).

10. The device for preparing a positive electrode material for a lithium-ion battery according to claim 9, characterized in that: A bracket (12) is arranged at the top of the support platform (1), and a dropper (14) is connected to the free end of the bracket (1), and the opening of the dropper (14) is vertically aligned with the top opening of the mixing tube (6).

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