Thermal compounding device and battery lamination system
By designing the first and second composite mechanisms of the thermal composite device in the electrode sheet composite device, the middle and edge areas of the pressed electrode sheet composite member, the problem of insufficient compatibility of the polar roll wave edges in the prior art is solved, and the problem of improved Compound yield and battery cell performance reduce manufacturing costs.
Patent Information
- Application Number
- CN202323247543.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-11-30
AI Technical Summary
During the longitudinal continuous recombination process of existing pole sheet composite devices, the compatibility of the pole coiled wave edges is weak, which is prone to bubble defects, pole sheet breaks and diaphragm wrinkles, resulting in low compound yield, high manufacturing cost and battery. Performance improvement is difficult to achieve.
A thermal composite device is designed, including first and second thermal composite mechanisms, through the first composite roller assembly, the middle area is pressed along the conveying direction of the pole sheet composite member, and the second composite roller assembly is pressed along the width direction of both sides. In the area, increase the edge composite area, reduce the occurrence of adverse phenomena, and improve the tensioning effect through the tensioning unit.
It effectively improves the compatibility of the wavy edges of the opposing electrode composite parts, reduces the probability of bubble defects, pole folds and diaphragm wrinkles, improves the compound yield, reduces manufacturing costs, and improves the consistency of battery cell performance.
Smart Images
Figure CN222300699U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery manufacturing, in particular to a thermal composite device. Meanwhile, the utility model also relates to a battery stacking system using the thermal composite device. Background Art
[0002] Lithium-ion equipment technology is the key technology to improve the performance of lithium batteries, and pole piece formation is the key link in the manufacturing process of lithium-ion batteries. Among them, pole piece lamination is the top priority of cutting and laminating equipment. The quality of lamination determines the performance and production yield of the battery cell, which in turn affects the market competitiveness of the product.
[0003] However, the existing electrode composite device is to composite the electrode twice in a row in the longitudinal direction, the first time to composite the main area in the longitudinal direction, and the second time to composite the thinning area in the longitudinal direction. The disadvantage of this electrode composite device is that it has a weak compatibility with the wave edge of the incoming electrode roll, which is prone to produce bubble defects, electrode dead folds and diaphragm wrinkles, resulting in a low composite yield, which makes it extremely challenging to reduce manufacturing costs and improve battery performance. Utility Model Content
[0004] In view of this, the present invention aims to provide a thermal composite device, which can improve the composite yield.
[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0006] A thermal composite device, used for pressing a composite electrode formed by stacking an electrode and a diaphragm into one body, the thermal composite device comprising a conveying mechanism for conveying the composite electrode, and a first thermal composite mechanism and a second thermal composite mechanism sequentially arranged along the conveying direction of the composite electrode;
[0007] The first thermal composite mechanism has a first composite roller assembly, and the first composite roller assembly is used to press the middle area of the electrode composite in the width direction into one, and the width direction is perpendicular to the conveying direction of the electrode composite;
[0008] The second thermal composite mechanism comprises a second composite roller assembly, and the second composite roller assembly is used for pressing the edge areas on both sides of the electrode composite in the width direction into one.
[0009] Furthermore, the first composite roller assembly rolls the middle region along the conveying direction of the pole piece composite, and the rolling direction of the second composite roller assembly is perpendicular to the rolling direction of the first composite roller assembly.
[0010] Furthermore, the first composite roller assembly includes a first composite roller and a second composite roller respectively arranged on the upper and lower sides of the pole piece composite.
[0011] Furthermore, the second thermal composite mechanism comprises a support platform, and the second composite roller assembly and the support platform are respectively arranged on the upper and lower sides of the pressed electrode composite.
[0012] Furthermore, the second composite roller assembly includes two third composite rollers arranged at intervals along the width direction of the pole piece composite, and the two third composite rollers correspond one-to-one to the two edge areas.
[0013] Furthermore, each of the third composite rollers is configured to roll from the middle region to the corresponding edge region.
[0014] Furthermore, it also includes a pole piece unwinding mechanism and a diaphragm unwinding mechanism; the pole piece unwinding mechanism is used to unwind the pole piece, and the diaphragm unwinding mechanism includes a first diaphragm unwinding assembly for unwinding the diaphragm toward the upper side of the pole piece, and a second diaphragm unwinding assembly for unwinding the diaphragm toward the lower side of the pole piece.
[0015] Furthermore, both the first diaphragm unwinding assembly and the second diaphragm unwinding assembly have a tensioning unit for tensioning the diaphragm during unwinding.
[0016] Furthermore, each of the tensioning units comprises two tensioning rollers arranged at intervals along the conveying direction of the pole piece composite, and the two tensioning rollers are staggered in the up-and-down direction.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] The thermal composite device described in the utility model can improve the compatibility with the wavy edges of the electrode sheet composite by compositeing the middle area of the electrode sheet composite along the conveying direction of the electrode sheet composite through the first composite roller assembly, and compositeing the edge areas on both sides of the electrode sheet composite along the width direction through the second composite roller assembly, while reducing the probability of adverse phenomena such as bubble defects, electrode sheet dead folding and diaphragm wrinkling during the composite process, thereby effectively improving the composite yield, reducing manufacturing costs, and improving the consistency of battery cell performance, thereby having a good use effect.
[0019] In addition, the first composite roller assembly rolls the middle area along the conveying direction of the electrode composite, and the rolling direction of the second composite roller assembly is perpendicular to the rolling direction of the first composite roller assembly, which can increase the composite area of the edge areas on both sides, thereby helping to improve the composite efficiency. Each third composite roller is configured to roll from the middle area to the corresponding edge area, which helps to avoid the probability of producing bubble defects, electrode dead folds, and diaphragm wrinkles. Each tensioning unit includes two tensioning rollers arranged at intervals along the conveying direction of the electrode composite, and the two tensioning rollers are staggered in the up and down directions, which can achieve a better structural layout rationality and improve the tensioning effect.
[0020] Another object of the present invention is to provide a battery lamination system for pressing a pole piece and a diaphragm into an integrated pole piece composite and laminating the pole pieces, wherein the battery lamination system uses the thermal lamination device as described above.
[0021] The battery stacking system described in the present invention and the above-mentioned thermal composite device have the same beneficial effects as compared with the traditional technology, and will not be further described here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:
[0023] Figure 1 It is a schematic diagram of the overall structure of the thermal composite device according to an embodiment of the utility model;
[0024] Figure 2 for Figure 1 A top view of the structure shown in;
[0025] Description of reference numerals:
[0026] 1. Pole piece composite; 101. middle area; 102. edge area;
[0027] 2. Lower diaphragm; 3. Upper diaphragm; 4. First composite roller; 5. Second composite roller; 6. Third composite roller a; 7. Third composite roller b; 8. Support platform; 9. First diaphragm unwinding assembly; 10. Second diaphragm unwinding assembly; 11. Tensioning roller; D. Conveying direction of pole piece composite. DETAILED DESCRIPTION
[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0029] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0030] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.
[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0032] Embodiment 1
[0033] The present embodiment relates to a thermal composite device, which can improve the compatibility with the wavy edge of the electrode composite 1, while reducing the probability of producing bubble defects, electrode folding and diaphragm wrinkling during the composite process, thereby improving the composite yield and having high practicality.
[0034] In terms of overall structure, Figure 1 and Figure 2 As shown, the thermal composite device of this embodiment is used to press the electrode composite 1 formed by stacking the electrode and the diaphragm into one body, and the thermal composite device includes a conveying mechanism for conveying the electrode composite 1, and a first thermal composite mechanism and a second thermal composite mechanism arranged in sequence along the conveying direction D of the electrode composite.
[0035] Among them, the first thermal composite mechanism has a first composite roller 4 component, which is used to press the middle area 101 (ie, the main area) of the electrode composite 1 in the width direction into one, and the width direction is perpendicular to the conveying direction D of the electrode composite.
[0036] The second thermal composite mechanism comprises a second composite roller 5 assembly, and the second composite roller 5 assembly is used to press the edge areas 102 on both sides of the electrode composite 1 in the width direction into one.
[0037] Based on the above overall introduction, in this embodiment, as an exemplary structure, Figure 2 As shown, the first composite roller 4 assembly rolls the middle region 101 along the conveying direction D of the electrode composite, and the rolling direction of the second composite roller 5 assembly is perpendicular to the rolling direction of the first composite roller 4 assembly.
[0038] The advantage of such a configuration is that it can increase the composite area of the edge regions 102 on both sides, thereby facilitating the improvement of the composite efficiency.
[0039] In this embodiment, based on the requirements of the overall structural layout of the thermal composite device, as a preferred implementation form, the first composite roller 4 assembly of this embodiment includes a first composite roller 4 and a second composite roller 5 respectively arranged on the upper and lower sides of the pole piece composite 1.
[0040] At the same time, as a preferred implementation form, the second thermal composite mechanism of this embodiment includes a support platform 8, and the second composite roller 5 assembly and the support platform 8 are respectively arranged on the upper and lower sides of the pressed electrode composite 1.
[0041] It is worth mentioning here that along the conveying direction D of the electrode composite, the second composite roller 5 assembly and the support platform 8 are located downstream of the first composite roller 4 assembly, that is, the middle area 101 is composited first, and then the edge areas 102 on both sides are composited.
[0042] Specifically, the second composite roller 5 assembly of this embodiment includes two third composite rollers arranged at intervals along the width direction of the electrode composite 1, and the two third composite rollers correspond to the two edge areas 102 one by one. Figure 2 The two third composite rollers are respectively indicated as the third composite roller a6 and the third composite roller b7.
[0043] In addition, in this embodiment, as a preferred implementation form, in the width direction of the electrode composite 1, each third composite roller is configured to roll from the middle area 101 to the corresponding edge area 102. This is conducive to avoiding the probability of producing bubble defects, electrode dead folds and diaphragm wrinkles.
[0044] In addition, the thermal composite device of this embodiment further includes a pole piece unwinding mechanism and a diaphragm unwinding mechanism. The pole piece unwinding mechanism is used to unwind the pole piece, and the diaphragm unwinding mechanism includes a first diaphragm unwinding assembly 9 for unwinding the diaphragm toward the upper side of the pole piece, and a second diaphragm unwinding assembly 10 for unwinding the diaphragm toward the lower side of the pole piece.
[0045] During specific implementation, in order to facilitate the distinction and introduction of related contents, the diaphragm on the upper side is called the upper diaphragm 3, and the diaphragm on the lower side is called the lower diaphragm 2. At the same time, as a preferred implementation form, the first diaphragm unwinding assembly 9 and the second diaphragm unwinding assembly 10 of this embodiment both have a tensioning unit for tensioning the diaphragm in the unwinding, so as to facilitate the tensioning of the upper diaphragm 3 and the lower diaphragm 2 to ensure the composite quality.
[0046] Furthermore, as a preferred arrangement, in this embodiment, each tensioning unit includes two tensioning rollers 11 arranged at intervals along the conveying direction D of the electrode composite, and the two tensioning rollers 11 are arranged staggered in the vertical direction. The advantage of such an arrangement is that a better structural arrangement rationality can be achieved and the tensioning effect can be improved.
[0047] The thermal composite device of this embodiment can improve the compatibility with the wavy edges of the electrode sheet composite 1, and reduce the probability of producing bubble defects, electrode sheet dead folding, diaphragm wrinkling and other undesirable phenomena during the composite process, thereby effectively improving the composite yield, reducing manufacturing costs, and improving the consistency of battery cell performance, thereby having a good use effect.
[0048] Embodiment 2
[0049] This embodiment relates to a battery lamination system, which is used to press pole pieces and diaphragms into an integrated pole piece composite and stack them. The battery lamination system uses the thermal composite device in the first embodiment.
[0050] The battery lamination system of this embodiment can improve the composite yield, reduce manufacturing costs, and improve the consistency of battery cell performance by using the thermal composite device in the first embodiment, thereby improving the market competitiveness of the finished battery.
[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A thermal composite device for pressing a composite electrode formed by laminating an electrode and a diaphragm into one body, characterized in that: The thermal composite device comprises a conveying mechanism for conveying the electrode composite, and a first thermal composite mechanism and a second thermal composite mechanism are sequentially arranged along the conveying direction of the electrode composite; The first thermal composite mechanism has a first composite roller assembly, and the first composite roller assembly is used to press the middle area of the electrode composite in the width direction into one, and the width direction is perpendicular to the conveying direction of the electrode composite; The second thermal composite mechanism comprises a second composite roller assembly, and the second composite roller assembly is used for pressing the edge areas on both sides of the electrode composite in the width direction into one.
2. The thermal composite device according to claim 1, characterized in that: The first composite roller assembly rolls the middle region along the conveying direction of the pole piece composite, and the rolling direction of the second composite roller assembly is perpendicular to the rolling direction of the first composite roller assembly.
3. The thermal composite device according to claim 1, characterized in that: The first composite roller assembly comprises a first composite roller and a second composite roller respectively arranged on the upper and lower sides of the pole piece composite.
4. The thermal composite device according to claim 1, characterized in that: The second thermal composite mechanism comprises a support platform, and the second composite roller assembly and the support platform are respectively arranged on the upper and lower sides of the pressed electrode composite.
5. The thermal composite device according to claim 4, characterized in that: The second composite roller assembly includes two third composite rollers arranged at intervals along the width direction of the pole piece composite, and the two third composite rollers correspond to the two edge areas one by one.
6. The thermal composite device according to claim 5, characterized in that: Each of the third composite rollers is configured to roll from the middle region to the corresponding edge region.
7. The thermal composite device according to any one of claims 1 to 6, characterized in that: It also includes a pole piece unwinding mechanism and a diaphragm unwinding mechanism; The pole piece unwinding mechanism is used for unwinding the pole piece, and the diaphragm unwinding mechanism includes a first diaphragm unwinding assembly for unwinding the diaphragm toward the upper side of the pole piece, and a second diaphragm unwinding assembly for unwinding the diaphragm toward the lower side of the pole piece.
8. The thermal composite device according to claim 7, characterized in that: The first diaphragm unwinding assembly and the second diaphragm unwinding assembly both have a tensioning unit for tensioning the diaphragm being unwound.
9. The thermal composite device according to claim 8, characterized in that: Each of the tensioning units comprises two tensioning rollers arranged at intervals along the conveying direction of the pole piece composite, and the two tensioning rollers are arranged staggered in the up-and-down direction.
10. A battery lamination system, used for pressing a pole piece and a diaphragm into an integrated pole piece composite and laminating the pole pieces, characterized in that: The battery stacking system uses the thermal composite device described in any one of claims 1 to 9.