Lamination processing and forming equipment for lithium battery cell production

Abstract

The invention relates to the technical field of lamination processing and forming equipment, and discloses lamination processing and forming equipment for lithium battery cell production, the lamination processing and forming equipment comprises a support frame, a pressing device and a material taking device, the pressing device is fixedly connected to the top of the support frame, and the material taking device is slidably connected to the top of the support frame; a horizontal detection assembly used for detecting the levelness of the pole piece is arranged below the pressing device, a positioning assembly used for conducting auxiliary positioning on the pole piece is arranged below the material taking device, and due to the arrangement of the horizontal detection assembly, when a base plate inclines, equipment operation is stopped in time, and the situation that the pole piece is damaged due to continuous uneven extrusion can be avoided; compared with the prior art, the pole piece extrusion device has the advantages that the quality of the pole piece is guaranteed, meanwhile, the extrusion device can be prevented from being damaged due to abnormal stress, the service life of equipment is prolonged, safety accidents such as part flying-out and fire disasters caused by continuous operation of the equipment in an abnormal state are avoided, the safety of the production process is improved, and defective products caused by equipment faults are reduced.

Description

Technical Field

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

[0002] A lithium-ion battery stacker is a key device specifically used to alternately stack positive and negative electrode sheets and separators to produce lithium-ion battery cells. This equipment is mainly used to alternately stack positive and negative electrode sheets and separators to form the internal structure of lithium battery cells. It can achieve high-precision stacking of electrodes and separators, improve the performance and safety of battery cells, and provide strong support for the development of the lithium battery industry.

[0003] During the long-term operation of lithium-ion battery stacking machines, the backing plate is prone to tilting due to factors such as continuous operation and vibration of the equipment. Existing lithium-ion battery stacking machines often lack effective real-time monitoring and adjustment mechanisms, and are unable to promptly detect and correct the tilt of the backing plate. When abnormal conditions such as the backing plate tilting occur, the existing equipment usually does not automatically stop operation, but continues to operate, which further aggravates the damage to the equipment and even causes safety accidents. For example, it may cause the electrode to be damaged by excessive compression, or the compression device to malfunction due to uneven force. In addition, the horizontal detection mechanism in the existing technology usually uses traditional sensors or mechanical devices for detection. These detection methods have limited accuracy and cannot accurately detect small changes in the tilt of the backing plate. For example, some sensors are interfered with by environmental factors, resulting in inaccurate detection results, while mechanical devices are subject to wear and errors, affecting detection accuracy. At the same time, existing horizontal detection mechanisms are usually relatively complex, requiring multiple sensors and control components to work together, which not only increases the complexity and maintenance cost of the equipment, but also reduces the reliability of the equipment. At the same time, the complex detection mechanism also occupies a large space, affecting the compactness and layout design of the equipment.

[0004] In the prior art, when lithium-ion battery stacking machines position pole pieces, clamping claws are usually used to position the pole pieces. However, lithium-ion battery pole pieces are usually thin and fragile. During the positioning process, the clamping claws fix the pole pieces by clamping, which easily applies uneven force to the pole pieces. This uneven force can cause excessive force on the pole pieces locally, especially near the clamping points, causing the pole pieces to bend or even be damaged. The clamping action of the clamping claws can easily cause stress concentration on the pole pieces. The clamping force of the clamping claws can cause the pole pieces to deform and destroy their flatness. Uneven pole pieces can lead to poor contact between the pole pieces during the subsequent stacking process, affecting the performance and consistency of the battery.

[0005] Therefore, it is necessary to provide a lamination processing and molding equipment for lithium battery cell production to solve the above problems. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a lamination processing and molding equipment for the production of lithium battery cells.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stacking processing and forming equipment for lithium battery cell production, comprising a support frame, a pressing device and a material picking device, the pressing device being fixedly connected to the top of the support frame, the material picking device being slidably connected to the top of the support frame, a horizontal detection component for detecting the level of the electrode sheet being provided below the pressing device, and a positioning component for assisting in positioning the electrode sheet being provided below the material picking device.

[0008] Preferably, the horizontal detection component includes a square block, which is fixedly connected to the middle part of the support frame, a pad is clamped on the top of the square block, a detection groove is opened inside the square block, and a cylindrical interference block is symmetrically slidably connected to the top of the detection groove, and a balancing ball is provided under each of the two cylindrical interference blocks.

[0009] Preferably, the horizontal detection component also includes a limit block group, which is fixedly connected to the bottom of the detection groove. The bottom of the detection groove is slidably connected to a trapezoidal slider, the bottom of the trapezoidal slider is fixedly connected to a first conductive sheet, and the bottom of the square block is fixedly connected to a second conductive sheet.

[0010] Preferably, the positioning assembly includes a placement block group, the placement block group is fixedly connected to the middle part of the support frame, the top of the placement block group is slidably connected to a positioning plate, the bottom of the positioning plate is fixedly connected to a spherical lever, a working groove is opened inside the placement block group, the inside of the working groove is rotatably connected to a drive rod, and the drive rod is fixedly connected to the output shaft of an external drive device, the middle part of the drive rod is slidably connected to a power-assisting reel, and the inside of the power-assisting reel is fixedly connected to a positioning column.

[0011] Preferably, the positioning assembly includes an adjusting ring, which is sleeved on the end of the driving rod away from the external driving device. The outer wall of the adjusting ring is rotatably connected to a threaded rod, and the threaded rod is rotatably connected to the inside of the placement block group. A rotating rod is rotatably connected between the power-assisting reel and the adjusting ring, and a sealing plate is rotatably connected to the inside of the placement block group.

[0012] Preferably, the trapezoidal slider is arranged between the limit block groups, and the two balancing balls are arranged on both sides of the trapezoidal slider.

[0013] Preferably, the first conductive sheet is electrically connected to the pressing device and the material taking device, and the second conductive sheet is electrically connected to the power supply used by the equipment.

[0014] Preferably, the spherical lever is slidably connected to the top of the working groove, and the positioning column is rotatably connected to the middle of the driving rod.

[0015] The present invention provides a lamination processing and molding equipment for lithium battery cell production. Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up the horizontal detection component, when the pressing device is squeezing the electrode, if the pad is tilted due to the long-term operation of the squeezing device, the two cylindrical friction blocks will change the contact surface with the pad, thereby causing the horizontal height of the two cylindrical friction blocks to be different. Then, the cylindrical friction block will slide through the balancing ball to contact the trapezoidal slider, thereby causing the trapezoidal slider to drive the first conductive sheet and the second conductive sheet to break away from the conflict, so that the pressing device is electrically disconnected from the power supply of the equipment, thereby stopping the lithium-ion battery stacking machine from continuing to operate. When the pad is tilted, stopping the equipment in time can avoid damage to the electrode due to continuous uneven squeezing, thereby ensuring the quality of the electrode. At the same time, it can also prevent the squeezing device from being damaged due to abnormal force, thereby extending the service life of the equipment and avoiding safety accidents caused by the continued operation of the equipment in an abnormal state, such as flying parts and fire, thereby improving the safety of the production process. By stopping the equipment in time, the uneven squeezing of the electrode due to the tilt of the pad is avoided, thereby ensuring the quality consistency of each electrode, improving the overall performance of the lithium-ion battery, and reducing defective products caused by equipment failure.

[0017] Among them, compared with the horizontal detection mechanism in the existing technology, the spherical design of the balancing ball makes the detection of the pad more sensitive, and can quickly sense the slight tilt changes of the pad. At the same time, the cylindrical resistance block is connected to the trapezoidal slider through the balancing ball, and the action of the balancing ball makes the force transmission more flexible, while also reducing the friction resistance. This coordination method enables the trapezoidal slider to quickly respond to changes in the cylindrical resistance block and realize fast power-off operation.

[0018] 2. Through the setting of the positioning component, when the staff rotates the threaded rod, the threaded rod will drive the power-assisting reel to rotate around the driving rod through the adjusting ring and the rotating rod, and in this process the driving rod will drive the inclined power-assisting reel to rotate, thereby causing the power-assisting reel to continuously move the spherical lever back and forth during rotation, and the spherical lever will drive the positioning plate to slide along the top of the placement block group, so that the pole piece on the top of the placement block group is positioned in the center of the placement block group during the movement of the positioning plate, which is convenient for the subsequent material-retrieving device to retrieve the pole piece. In this structure, the spherical lever is moved by the rotation of the power-assisting reel, thereby causing the positioning plate to move back and forth horizontally in a fixed pattern to realize pole piece positioning. During the whole process, The contact between the positioning plate and the pole piece is a relatively gentle push, and the pole piece is not directly clamped and squeezed like the clamping claws in the prior art. This gentle positioning method greatly reduces the risk of folding or damaging the pole piece. The pole piece is usually thin, and the clamping claws are prone to damage the pole piece due to improper control of the clamping force during positioning. The structure fully considers the thin characteristics of the pole piece and adopts a non-clamping method for positioning, avoiding direct strong force on the pole piece. It adopts a method similar to a small shake to avoid applying excessive stress to the pole piece, so that the pole piece is corrected by small multiple impacts, which is more suitable for the physical properties of the pole piece, avoids stress concentration, and makes the pole piece more evenly stressed during the positioning process, reducing the possibility of folding and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the positional relationship of the overall device of the present invention;

[0020] Figure 2 It is a cross-sectional view of the overall device of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0022] Figure 4 This is a schematic diagram of the position relationship of the level detection components of the present invention;

[0023] Figure 5 This is a schematic diagram of the position relationship of the positioning components of the present invention;

[0024] Figure 6 This is a schematic diagram showing the positional relationship among the block group, positioning plate, and spherical lever of the present invention;

[0025] Figure 7 This is a schematic diagram of the positional relationship among the driving rod, power-assisted reel, and positioning column of the present invention;

[0026] Figure 8 For the present invention Figure 7 A magnified view of the structure at point B in the middle;

[0027] Figure 9 This is a schematic diagram of the positional relationship among the adjusting ring, threaded rod, and rotating rod of the present invention.

[0028] Reference numerals: 11, support frame; 12, pressing device; 13, material taking device;

[0029] The level detection assembly includes: 21, square block; 22, pad; 23, detection groove; 24, columnar interference block; 25, limit block group; 26, trapezoidal slider; 27, first conductive sheet; 28, second conductive sheet; 29, balance ball;

[0030] The positioning assembly includes: 31, a placement block group; 32, a positioning plate; 33, a spherical lever; 34, a working groove; 35, a driving rod; 36, a power-assisting reel; 37, a positioning column; 38, an adjusting ring; 39, a threaded rod; 310, a rotating rod; and 311, a sealing plate. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the description of the present invention, the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0033] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0034] Implementation example Figures 1 to 9 As shown, a stacking processing and molding equipment for lithium battery cell production provided by an embodiment of the present invention includes a support frame 11, a pressing device 12 and a material picking device 13. The pressing device 12 is fixedly connected to the top of the support frame 11, and the material picking device 13 is slidably connected to the top of the support frame 11. A horizontal detection component for detecting the level of the electrode is provided below the pressing device 12, and a positioning component for assisting in positioning the electrode is provided below the material picking device 13.

[0035] The horizontal detection component includes a square block 21, which is fixedly connected to the middle of the support frame 11. A pad 22 is clamped on the top of the square block 21. A detection groove 23 is opened inside the square block 21. The top of the detection groove 23 is symmetrically slidably connected to a cylindrical interference block 24. A balancing ball 29 is provided under the two cylindrical interference blocks 24.

[0036] The horizontal detection component also includes a limit block group 25, which is fixedly connected to the bottom of the detection groove 23. The bottom of the detection groove 23 is slidably connected to a trapezoidal slider 26, the bottom of the trapezoidal slider 26 is fixedly connected to a first conductive sheet 27, and the bottom of the square block 21 is fixedly connected to a second conductive sheet 28.

[0037] The trapezoidal slider 26 is disposed between the limit block groups 25 , and the two balancing balls 29 are disposed on both sides of the trapezoidal slider 26 , so that the two balancing balls 29 will slide against the trapezoidal slider 26 after being squeezed by different stresses.

[0038] The first conductive sheet 27 is electrically connected to the pressing device 12 and the material picking device 13, and the second conductive sheet 28 is electrically connected to the power supply of the equipment, so that the pressing device 12 and the material picking device 13 are automatically powered off when the first conductive sheet 27 and the second conductive sheet 28 are out of contact.

[0039] The positioning assembly includes a placement block group 31, which is fixedly connected to the middle of the support frame 11. The top of the placement block group 31 is slidably connected to a positioning plate 32, and the bottom of the positioning plate 32 is fixedly connected to a spherical lever 33. A working groove 34 is provided inside the placement block group 31, and a driving rod 35 is rotatably connected inside the working groove 34. The driving rod 35 is fixedly connected to the output shaft of the external driving device. The middle of the driving rod 35 is slidably connected to a power-assisting reel 36, and the inside of the power-assisting reel 36 is fixedly connected to a positioning column 37.

[0040] The positioning assembly includes an adjusting ring 38, which is sleeved on the end of the driving rod 35 away from the external driving device. The outer wall of the adjusting ring 38 is rotatably connected to a threaded rod 39, and the threaded rod 39 is rotatably connected to the inside of the placement block group 31. A rotating rod 310 is rotatably connected between the power-assisting reel 36 and the adjusting ring 38, and a sealing plate 311 is rotatably connected to the inside of the placement block group 31.

[0041] The placement block group 31 is set on both sides of the square block 21, the spherical lever 33 is slidably connected to the top of the working groove 34, and the positioning column 37 is rotatably connected to the middle of the driving rod 35, so that the assist reel 36 can rotate in the middle of the driving rod 35.

[0042] Working principle: In the initial state, the two cylindrical interference blocks 24 are at the same horizontal height, the first conductive sheet 27 and the second conductive sheet 28 are in conflict, the power-assisting reel 36 does not rotate around the driving rod 35, and the rotating rod 310, the power-assisting reel 36 and the adjusting ring 38 are all in a vertical state.

[0043] During operation, when the lithium-ion battery stacking machine is working for a long time, the pad 22 is prone to tilting due to factors such as continuous operation and vibration of the equipment. Subsequently, the pad 22 will apply different stresses to the two cylindrical interference blocks 24 at the bottom, thereby making the two cylindrical interference blocks 24 unable to be at the same level. Subsequently, the cylindrical interference block 24 at the bottom will interfere with the balancing ball 29.

[0044] At this time, the above-mentioned balancing ball 29 that is being interfered with will interfere with the limit block assembly 25 and the trapezoidal slider 26. Since the limit block assembly 25 and the square block 21 are fixedly connected, the force exerted by the balancing ball 29 will push it to slide, and the other side of the balancing ball 29 will push the other balancing ball 29 to rise;

[0045] During the movement of the trapezoidal slider 26, the first conductive sheet 27 and the second conductive sheet 28 are driven to disengage from each other. Since the first conductive sheet 27 is electrically connected to the pressing device 12 and the material taking device 13, and the second conductive sheet 28 is electrically connected to the power supply used by the equipment, the pressing device 12 and the material taking device 13 are automatically powered off when the first conductive sheet 27 and the second conductive sheet 28 are disengaged from each other. In this way, when the pressing device 12 squeezes the electrode sheet, if the pad 22 tilts due to the long-term operation of the squeezing device, the vibration stops and the lithium-ion battery stacking machine continues to operate, thereby avoiding damage to the electrode sheet due to continuous uneven squeezing, ensuring the quality of the electrode sheet, and at the same time, preventing the squeezing device from being damaged due to abnormal force, extending the service life of the equipment, avoiding safety accidents caused by the continued operation of the equipment in an abnormal state, improving the safety of the production process, ensuring the quality consistency of each electrode sheet, improving the overall performance of the lithium-ion battery, and reducing defective products caused by equipment failure.

[0046] Among them, compared with the horizontal detection mechanism in the prior art, the spherical design of the balancing ball 29 makes the detection of the pad 22 more sensitive, and can quickly sense the slight tilt changes of the pad 22. At the same time, the cylindrical resistance block 24 is connected to the trapezoidal slider 26 through the balancing ball 29, and the action of the balancing ball 29 makes the force transmission more flexible, while also reducing the friction resistance. This coordination method enables the trapezoidal slider 26 to quickly respond to changes in the cylindrical resistance block 24 and achieve fast power-off operation.

[0047] Before starting the lithium-ion battery stacking machine, it is necessary to rotate the sealing plate 311 away from the block group 31, and then hold the two threaded rods 39 and rotate them forward. Then, the two threaded rods 39 will drive the adjustment ring 38 to slide into the working groove 34. During the movement of the adjustment ring 38, it will contact the power-assisting reel 36 through the rotating rod 310. At this time, the power-assisting reel 36 drives the positioning column 37 to rotate around the driving rod 35, thereby achieving the adjustment of the power-assisting reel 36.

[0048] Then, the external driving device is powered on. When the material taking device 13 takes the electrode, it is necessary to perform secondary positioning on the electrode. Because the adsorption position of the electrode by the material taking device 13 will be offset during the movement, if the electrode is not positioned secondary, the electrode will be tilted during the stacking process, thereby affecting the processing of the lithium battery cell.

[0049] After the material taking device 13 finishes taking the material, the material taking device 13 will place the electrode on the top of the placement block group 31 to adjust the position of the electrode, and the external drive device will drive the drive rod 35 fixedly connected to its output shaft to rotate after being energized, and then the drive rod 35 will drive the above-adjusted power-assisting reel 36 to rotate synchronously. In this process, the inclined power-assisting reel 36 will drive the positioning plate 32 to move back and forth through the spherical lever 33. The tilting angle of the power-assisting reel 36 is fixed by the adjusting ring 38 through the rotating rod 310, so that the positioning plate 32 can move back and forth horizontally in a fixed pattern. In the process of the positioning plate 32 contacting the electrode, the electrode is stably placed on the top of the placement block group 31, realizing the secondary positioning of the electrode, which is different from the existing In the technology, when positioning is performed by clamping claws, the contact between the positioning plate 32 and the pole piece is a relatively gentle push, and the pole piece is not directly clamped and squeezed like the clamping claws in the prior art. This gentle positioning method greatly reduces the risk of folding or damaging the pole piece. The pole piece is usually thin, and the clamping claws are prone to damage the pole piece due to improper control of the clamping force during positioning. The structure fully considers the thin characteristics of the pole piece and adopts a non-clamping method for positioning, avoiding direct strong force on the pole piece. It adopts a method similar to a small shake to avoid applying excessive stress to the pole piece, so that the pole piece is corrected by small multiple impacts, which is more suitable for the physical properties of the pole piece, avoids stress concentration, and makes the pole piece more evenly stressed during the positioning process, reducing the possibility of folding and damage.

[0050] In contrast to the above-mentioned movement process, when the staff rotates the two threaded rods 39 in the opposite direction, the adjusting ring 38 will pull the assist reel 36 through the rotating rod 310 to adjust again. When the rotating rod 310, the assist reel 36 and the adjusting ring 38 are in a vertical state, the horizontal reciprocating movement path of the positioning plate 32 is shorter. Conversely, the larger the angle generated by the adjusting ring 38 pulling the assist reel 36 through the rotating rod 310, the longer the horizontal reciprocating movement path of the positioning plate 32.

[0051] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and their variations are included in the scope and spirit of the invention and are included in the invention described in the claims and their equivalents.

[0052] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A lamination processing and molding device for producing lithium battery cells, comprising a support frame (11), a pressing device (12) and a material taking device (13), wherein the pressing device (12) is fixedly connected to the top of the support frame (11), and the material taking device (13) is slidably connected to the top of the support frame (11), characterized in that: A level detection component for detecting the level of the pole piece is provided below the pressing device (12), and a positioning component for assisting in positioning the pole piece is provided below the material taking device (13).

2. The lamination processing and molding equipment for producing lithium battery cells according to claim 1, characterized in that: The horizontal detection component includes a square block (21), the square block (21) is fixedly connected to the middle of the support frame (11), the top of the square block (21) is clamped with a pad (22), the inside of the square block (21) is provided with a detection groove (23), the top of the detection groove (23) is symmetrically slidably connected with a columnar resistance block (24), and a balancing ball (29) is provided below the two columnar resistance blocks (24).

3. The lamination processing and molding equipment for producing lithium battery cells according to claim 2, characterized in that: The horizontal detection assembly further comprises a limit block group (25), the limit block group (25) is fixedly connected to the bottom of the detection groove (23), the bottom of the detection groove (23) is slidably connected to a trapezoidal slider (26), the bottom of the trapezoidal slider (26) is fixedly connected to a first conductive sheet (27), and the bottom of the square block (21) is fixedly connected to a second conductive sheet (28).

4. The lamination processing and molding equipment for producing lithium battery cells according to claim 1, characterized in that: The positioning assembly includes a placement block group (31), the placement block group (31) is fixedly connected to the middle of the support frame (11), the top of the placement block group (31) is slidably connected to a positioning plate (32), the bottom of the positioning plate (32) is fixedly connected to a spherical lever (33), a working groove (34) is provided inside the placement block group (31), the inside of the working groove (34) is rotatably connected to a driving rod (35), and the driving rod (35) is fixedly connected to the output shaft of the external driving device, the middle of the driving rod (35) is slidably connected to a power-assisting reel (36), and the inside of the power-assisting reel (36) is fixedly connected to a positioning column (37).

5. The lamination processing and molding equipment for producing lithium battery cells according to claim 4, characterized in that: The positioning assembly includes an adjusting ring (38), the adjusting ring (38) being sleeved on an end of a driving rod (35) away from an external driving device, the outer wall of the adjusting ring (38) being rotatably connected to a threaded rod (39), and the threaded rod (39) being rotatably connected to the interior of a placement block group (31), a rotating rod (310) being rotatably connected between the assisting reel (36) and the adjusting ring (38), and a sealing plate (311) being rotatably connected to the interior of the placement block group (31).

6. The lamination processing and molding equipment for producing lithium battery cells according to claim 3, characterized in that: The trapezoidal slider (26) is arranged between the limit block groups (25), and the two balancing balls (29) are arranged on both sides of the trapezoidal slider (26).

7. The lamination processing and molding equipment for producing lithium battery cells according to claim 3, characterized in that: The first conductive sheet (27) is electrically connected to the pressing device (12) and the material taking device (13), and the second conductive sheet (28) is electrically connected to the power supply used by the equipment.

8. The lamination processing and molding equipment for producing lithium battery cells according to claim 4, characterized in that: The spherical lever (33) is slidably connected to the top of the working groove (34), and the positioning column (37) is rotatably connected to the middle of the driving rod (35).

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