Auxiliary laminating device for first-layer diaphragm of lamination
By designing a laminated first-layer diaphragm auxiliary coating device for lithium battery lamination technology, the end of the diaphragm is fixed by using a pressing knife and a driving mechanism, and combined with the reciprocating movement of the lamination mechanism, the offset and alignment problems during the first-layer diaphragm coating process in the prior art are solved, and an efficient, stable and precise coating effect is achieved.
Patent Information
- Application Number
- CN202420372907.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-02-27
AI Technical Summary
In the existing lithium battery lamination technology, there are problems such as offset, tolerance tolerance beyond the alignment, diaphragm wrinkles and flange during the first layer of diaphragm coating, resulting in poor stability and low lamination efficiency.
A laminated first layer diaphragm auxiliary coating device is designed, including an auxiliary coating device, a slitting mechanism and a laminate table. The end of the diaphragm is fixed by a pressing knife and a driving mechanism, and combined with the reciprocating movement of the laminated mechanism, high-speed coating and high-precision alignment are achieved.
The efficiency and stability of the first layer coating are improved, the movement of the membrane is reduced, the alignment tolerance of the membrane is improved, and the diaphragm is ensured after the coating is coated.
Smart Images
Figure CN222581221U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery stacking, in particular to an auxiliary coating device for a first-layer diaphragm of a stacking. Background Art
[0002] Lithium battery stacking technology refers to the lithium battery manufacturing technology that uses a diaphragm to separate the positive and negative electrode sheets and stacks them in sequence to form a battery cell. Its basic principle and working process are: use the diaphragm assembly to pull out the rolled diaphragm, fold the diaphragm into a Z shape through the reciprocating motion of the stacking table or the diaphragm assembly, and at the same time, use a manipulator or other transfer device to alternately place the positive and negative electrode sheets between the folded diaphragms, and the diaphragms separate the positive and negative electrode sheets. Repeat the above process many times to eventually form a lithium battery cell with a certain thickness.
[0003] The existing laminating method of the first layer of diaphragm in stacking usually adopts a correction shaft in combination with air blowing. After a battery cell is stacked, the diaphragm is cut to cut the battery cell. The cut diaphragm will form a head end with one end swinging. The cut head end diaphragm is blown directly to the starting side of the first layer of lamination through positive pressure blowing. Then the laminating mechanism moves to pull the diaphragm, and the correction shaft moves to correct the deviation, and the diaphragm after backblowing is pulled to the stacking position on the bearing surface of the stacking table. However, due to the static electricity and adhesion effect of the diaphragm, and the airflow blowing causes the movement process of the diaphragm to have a certain randomness, the diaphragm is prone to deviation, which is easy to cause the alignment tolerance of the diaphragm to exceed the tolerance, and the diaphragm will be wrinkled and flanging, resulting in poor stability. After backblowing, the diaphragm is corrected, and the correction takes a long time, resulting in low stacking efficiency. Therefore, it is necessary to seek an auxiliary laminating device for the first layer of diaphragm in stacking to improve the stability and accuracy of the lamination. Utility Model Content
[0004] In order to solve the above technical problems, the utility model aims to provide a laminated first-layer diaphragm auxiliary coating device. The purpose of the utility model is achieved through the following technical solutions:
[0005] Provided is an auxiliary laminating device for the first-layer diaphragm of a stack, comprising an auxiliary laminating device, a slitting mechanism and a stacking table arranged in sequence; the auxiliary laminating device comprises a pressing knife, a driving mechanism and an adsorption plate, the pressing knife is connected to the driving mechanism, and the driving mechanism can drive the pressing knife to move and press it on the adsorption plate.
[0006] Preferably, the lamination table is used for coating and supporting battery cells.
[0007] Furthermore, the auxiliary coating device for the first-layer diaphragm of the laminate further comprises a coating mechanism, the coating mechanism is connected to the auxiliary coating device, and the coating mechanism can perform reciprocating motion in the horizontal direction.
[0008] Furthermore, a diaphragm is provided on the laminating mechanism, and the laminating mechanism is connected to the auxiliary laminating device, the slitting mechanism and the laminating table through the diaphragm.
[0009] Furthermore, the slitting mechanism is used to cut the diaphragm; the slitting mechanism can move up and down in the vertical direction.
[0010] Furthermore, a lamination pressing knife is provided on the lamination platform, and the lamination pressing knife can move up and down in the vertical direction.
[0011] Preferably, the lamination pressing knife can be pressed on the lamination table.
[0012] Furthermore, the laminating mechanism comprises two rotatable laminating rollers, and the two laminating rollers are arranged in parallel.
[0013] Preferably, the diaphragm is located between two laminating rollers.
[0014] Preferably, a film guiding gap is formed between the two film coating rollers, and the diaphragm passes through the film guiding gap and is then transferred to the auxiliary film coating device.
[0015] Furthermore, the number of the pressing knives is two, and the two pressing knives are respectively arranged at opposite ends of the adsorption plate.
[0016] Preferably, the number of the driving mechanisms is two, and the two driving mechanisms are respectively connected to the two pressing knives.
[0017] Furthermore, the driving mechanism includes a knife pressing lifting cylinder and a knife pressing in-and-out cylinder, and the knife pressing lifting cylinder and the knife pressing in-and-out cylinder are connected through the knife pressing; the knife pressing lifting cylinder can drive the knife pressing to do up and down reciprocating motion, and the knife pressing in-and-out cylinder can drive the knife pressing to do back and forth reciprocating motion.
[0018] Furthermore, the auxiliary laminating device also includes a bottom plate, and the knife pressing inlet and outlet cylinders are arranged on the bottom plate.
[0019] Furthermore, the auxiliary coating device also includes a waste discharge cover, and the waste discharge cover is connected to the adsorption plate.
[0020] The beneficial effects compared with the prior art are:
[0021] The utility model provides a first-layer diaphragm auxiliary laminating device for laminated sheets, which has the advantages of improving the first-layer laminating efficiency, first-layer laminating stability, and diaphragm alignment tolerance. Since the pressing knife of the auxiliary laminating device presses the diaphragm, the end position of the diaphragm is fixed, so when the first layer of laminating is performed, high-speed laminating can be performed, the first layer of laminating efficiency is improved, and the diaphragm will not move during laminating, and the first layer of diaphragm alignment tolerance can be improved. At the same time, the flatness of the diaphragm after the first layer of laminating is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 This is one of the structural schematic diagrams of the auxiliary coating device of the first layer of the laminated membrane of the utility model;
[0024] Figure 2 This is the second structural schematic diagram of the auxiliary coating device of the first layer of the laminated membrane of the utility model;
[0025] Figure 3 This is the third structural schematic diagram of the auxiliary coating device of the first layer of the laminated membrane of the utility model;
[0026] Figure 4 This is the fourth structural schematic diagram of the auxiliary coating device of the first layer of the laminated membrane of the utility model;
[0027] Figure 5 This is a front view of the auxiliary laminating device of the first layer of the laminated membrane of the utility model;
[0028] Figure 6 It is a top view of the auxiliary laminating device of the first layer of the laminated membrane of the utility model;
[0029] Figure 7 It is a three-dimensional structural schematic diagram of the auxiliary coating device of the first-layer diaphragm of the laminated sheet of the utility model.
[0030] Description of the symbols in the figure:
[0031] 1- auxiliary laminating device; 2- slitting mechanism; 3- laminating table; 4- laminating mechanism; 5- diaphragm; 6- battery cell; 11- adsorption plate; 12- press knife; 13- press knife lifting cylinder; 14- press knife in and out cylinder; 15- bottom plate; 16- waste discharge cover; 31- stacking press knife. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.
[0034] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
[0035] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0036] The terms "lateral", "longitudinal", "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0038] The battery cell of a lithium-ion battery is formed by staggered stacking of positive and negative electrodes, and a diaphragm (insulation) needs to be inserted between the positive and negative electrodes. In this embodiment, the stacking of the battery cell adopts a Z-type stacking method, that is, a continuous diaphragm is used during stacking. The diaphragm reciprocates horizontally on the stacking table, and the unloading mechanism stacks the positive and negative electrodes alternately between adjacent diaphragms to form a battery cell, that is, the battery cell is formed in the stacking order of diaphragm, positive electrode (negative electrode), diaphragm, negative electrode (positive electrode), and diaphragm, and the stacking of the battery cell is completed. The diaphragm needs to be cut off after the production of the previous battery cell is completed.
[0039] Example
[0040] See also Figure 1-Figure 7 The auxiliary coating device for the first layer of the lamination shown includes an auxiliary coating device 1, a slitting mechanism 2 and a lamination table 3 arranged in sequence; and also includes a coating mechanism 4, which can reciprocate in the horizontal direction. In this embodiment, the coating mechanism 4 can reciprocate along the auxiliary coating device 1, the slitting mechanism 2 and the lamination table 3. The coating mechanism 4 is provided with a diaphragm 5, and the coating mechanism 4 is connected to the auxiliary coating device 1, the slitting mechanism 2 and the lamination table 3 through the diaphragm 5. The lamination table 3 is used for coating and supporting the battery cell 6.
[0041] The coating mechanism 4 includes two rotatable coating rollers, and the two coating rollers are arranged in parallel. A film-guiding gap is formed between the two coating rollers, and the diaphragm 5 is transmitted to the auxiliary coating device 1 after passing through the film-guiding gap. The auxiliary coating device 1 includes a pressing knife 12, a driving mechanism and an adsorption plate 11, and the pressing knife 12 is connected to the driving mechanism, and the driving mechanism can drive the pressing knife 12 to move and press it on the adsorption plate 11. The number of pressing knives 12 of the auxiliary coating device 1 is two, and the two pressing knives 12 are respectively arranged at opposite ends of the adsorption plate 11. In this embodiment, the number of the driving mechanisms is two, and the two driving mechanisms are respectively connected to the two pressing knives 12. The driving mechanism can drive the pressing knife 12 to move and press the diaphragm 5 between the pressing knife 12 and the adsorption plate 11. The driving mechanism includes a knife pressing lifting cylinder 13 and a knife pressing in-and-out cylinder 14. The knife pressing lifting cylinder 13 and the knife pressing in-and-out cylinder 41 are connected through the knife pressing 12. The knife pressing lifting cylinder 13 can drive the knife pressing 12 to reciprocate up and down, and the knife pressing in-and-out cylinder 14 can drive the knife pressing 12 to reciprocate forward and backward. The auxiliary laminating device 1 also includes a bottom plate 15 and a waste discharge cover 16. The knife pressing in-and-out cylinder 14 is arranged on the bottom plate 15, and the waste discharge cover 16 is connected to the adsorption plate 11. The slitting mechanism 2 is used for cutting the diaphragm 5. The slitting mechanism 2 can be lifted and lowered in the vertical direction. The stacking table 3 is provided with a stacking knife 31, and the stacking knife 31 can be lifted and lowered in the vertical direction. The stacking knife 31 can hold the diaphragm 5 on the stacking table 3.
[0042] The specific working process of the auxiliary coating device of the first layer of laminated diaphragm is as follows:
[0043] After the previous battery cell 6 is stacked, at this time, the stacking knife 31 continues to hold the battery cell 6 on the stacking table 3, and the coating mechanism 4 continues to pull the diaphragm 5 to the side of the auxiliary coating device 1 away from the slitting mechanism 2. In this embodiment, the coating mechanism 4 is located on the left side of the auxiliary coating device 1. Start the driving mechanism, the knife lifting cylinder 13 drives the knife 12 downward, and the knife in and out cylinder 14 drives the knife 12 forward, and the driving mechanism drives the knife 12 to hold the diaphragm 5 on the auxiliary coating device 1 between the knife 12 and the adsorption plate 11. The slitting mechanism 2 moves upward in the vertical direction to cut the diaphragm 5. After the diaphragm 5 is cut, the slitting mechanism 2 returns to its original position. The stacking knife 31 rises in the vertical direction, away from the stacking table 3. The disconnected diaphragm 5 on the stacking table 3 is transferred together with the previous battery cell 6. The laminating mechanism 4 starts the first layer of laminating, and the laminating mechanism 4 transfers the diaphragm 5 to the side of the stacking table 3 away from the slitting mechanism 2. In this embodiment, the laminating mechanism 4 is located on the right side of the stacking table 3 at this time. The stacking table press 31 descends in the vertical direction, and the stacking table press 31 presses the diaphragm 5 on the stacking table 3 between the stacking table press 31 and the stacking table 3. At this time, the slitting mechanism 2 moves upward in the vertical direction to cut the diaphragm 5, and the slitting mechanism 2 returns to its original position after the diaphragm 5 is cut. Start the driving mechanism, the press knife lifting cylinder 13 drives the press knife 12 upward, and the press knife in and out cylinder 14 drives the press knife 12 backward, and the driving mechanism drives the press knife 12 away from the adsorption plate 11. Start the waste discharge cover 16, and use the negative pressure to suck the excess diaphragm 5 on the adsorption plate 11 into the waste discharge cover 16. Complete the first layer of laminating.
[0044] The beneficial effects compared with the prior art are:
[0045] The utility model provides a first-layer diaphragm auxiliary laminating device for laminated sheets, which has the advantages of improving the first-layer laminating efficiency, first-layer laminating stability, and diaphragm alignment tolerance. Since the pressing knife of the auxiliary laminating device presses the diaphragm, the end position of the diaphragm is fixed, so when the first layer of laminating is performed, high-speed laminating can be performed, the first layer of laminating efficiency is improved, and the diaphragm will not move during laminating, and the first layer of diaphragm alignment tolerance can be improved. At the same time, the flatness of the diaphragm after the first layer of laminating is high.
[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A laminated first-layer diaphragm auxiliary coating device, characterized in that: It includes an auxiliary laminating device, a slitting mechanism and a laminating table which are arranged in sequence; the auxiliary laminating device includes a pressing knife, a driving mechanism and an adsorption plate, the pressing knife is connected to the driving mechanism, and the driving mechanism can drive the pressing knife to move and press it on the adsorption plate.
2. The auxiliary coating device for the first layer of laminated membrane according to claim 1, characterized in that: It also includes a laminating mechanism, which is connected to the auxiliary laminating device and can perform reciprocating motion in the horizontal direction.
3. The auxiliary coating device for the first layer of laminated membrane according to claim 2, characterized in that: The laminating mechanism is provided with a diaphragm, and the laminating mechanism is connected with the auxiliary laminating device, the slitting mechanism and the laminating table through the diaphragm.
4. The auxiliary coating device for the first layer of laminated membrane according to claim 3, characterized in that: The slitting mechanism is used for cutting the diaphragm; the slitting mechanism can move up and down in the vertical direction.
5. The auxiliary laminating device for the first layer of laminated membrane according to claim 4, characterized in that: The lamination platform is provided with a lamination pressing knife, and the lamination pressing knife can move up and down in the vertical direction.
6. The auxiliary coating device for the first layer of laminated membrane according to claim 3, characterized in that: The coating mechanism comprises two rotatable coating rollers, and the two coating rollers are arranged in parallel.
7. The auxiliary coating device for the first layer of laminated membrane according to claim 1, characterized in that: The number of the pressing knives is two, and the two pressing knives are respectively arranged at the opposite ends of the adsorption plate.
8. The auxiliary coating device for the first layer of laminated membrane according to claim 7, characterized in that: The driving mechanism includes a knife pressing lifting cylinder and a knife pressing in-and-out cylinder, and the knife pressing lifting cylinder and the knife pressing in-and-out cylinder are connected through the knife pressing; the knife pressing lifting cylinder can drive the knife pressing to do up and down reciprocating motion, and the knife pressing in-and-out cylinder can drive the knife pressing to do forward and backward reciprocating motion.
9. The auxiliary coating device for the first layer of laminated membrane according to claim 8, characterized in that: The auxiliary laminating device also includes a bottom plate, and the knife pressing inlet and outlet cylinder is arranged on the bottom plate.
10. The auxiliary laminating device for the first layer of laminated membrane according to claim 9, characterized in that: The auxiliary coating device also includes a waste discharge cover, and the waste discharge cover is connected to the adsorption plate.