Heating assembly and hot pressing device
By using the heating components of the flexible heating plate in the hot pressing device, the problem of uneven heating in the prior art is solved, uniform heating and better adhesion effect of lithium battery coil cores are achieved, and the performance and production of the battery cell are improved. efficiency.
Patent Information
- Application Number
- CN202411550373.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-02-11
AI Technical Summary
The existing heat pressing device heating plate cannot evenly transfer heat to the inside of the lithium battery core, resulting in the sticking between the inner layer of the core and the electrode sheet, which affects the performance and cycle life of the battery core, and has poor thermal conductivity. Increased production costs.
A heating assembly is provided, including a first heating plate and a second heating plate, at least one of which is a flexible heating plate, capable of clamping and uniformly heating the to-heat part, suitable for flat and curved surfaces.
Through the use of the flexible heating plate, the heated part to be heated can be uniformly heated, the thermal conductivity inside the lithium battery core can be improved, the adhesion effect between the diaphragm and the electrode sheet can be enhanced, and the performance and production efficiency of the battery cell can be improved.
Smart Images
Figure CN119419376A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of lithium battery processing, and in particular to a heating component and a hot pressing device. Background Art
[0002] With the popularization of new energy, the battery industry has been fully developed. Among them, lithium-ion batteries occupy most of the market share and play an important role in the fields of automobiles, power generation, and household appliances. With the development of the industry, the market has higher and higher requirements for battery performance, and the battery cell manufacturing process has become particularly important.
[0003] The wrinkles of the battery cell pole pieces, lithium deposition and black spots in the materials will directly affect the performance of the battery cell. The industry has improved this problem through hot pressing and shaping processes. That is, the core is transferred to the hot pressing device, and the upper and lower hot pressing plates apply a certain pressure to the core and heat it to a specified temperature for a certain period of time to achieve the purpose of shaping. The purpose of the above method is to make the PVDF in the diaphragm reach the softening temperature, so that the diaphragm is bonded to the positive and negative electrodes.
[0004] However, the heating plate of the existing hot pressing device cannot evenly transfer heat to the inside of the core, resulting in loose adhesion between the inner layer diaphragm of the core and the electrode. This not only affects the interface problem after formation, but also affects the subsequent cycle life of the battery cell. In addition, the poor thermal conductivity during the production process causes later rework, which increases production costs. Summary of the invention
[0005] The purpose of the present application is to provide a heating assembly and a heat pressing device to address the deficiencies in the above-mentioned prior art, which can be attached to the surface of a part to be heated so that the part to be heated is heated evenly.
[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0007] According to one aspect of an embodiment of the present application, a heating assembly is provided, including: a first heating plate and a second heating plate, the first heating plate and the second heating plate are respectively used to clamp the heated member on both sides of the heated member and heat the heated member, and at least one of the first heating plate and the second heating plate is a flexible heating plate.
[0008] Optionally, the first heating plate and the second heating plate are both flexible heating plates.
[0009] Optionally, the heating assembly is configured on the base, the first heating plate is fixed on the base, and the second heating plate is used to be connected to the driving assembly to move closer to or away from the first heating plate under the drive of the driving assembly.
[0010] Optionally, the first heating plate and the second heating plate can be buckled with each other, and surfaces of the first heating plate and the second heating plate that are close to each other after buckling are respectively in contact with the part to be heated.
[0011] Optionally, the part to be heated is a winding core, and the heating assembly further includes a tab heating plate, which is used to heat the tabs on the winding core.
[0012] Optionally, the tab heating plate includes a third heating plate and a fourth heating plate opposite to the third heating plate, and the third heating plate and the fourth heating plate are respectively used to clamp the tab on both sides of the tab and heat the tab.
[0013] Optionally, at least one of the third heating plate and the fourth heating plate is a flexible heating plate.
[0014] Optionally, there are two groups of tab heating plates, one group of tab heating plates is used to heat the positive electrode tab, and the other group of tab heating plates is used to heat the negative electrode tab.
[0015] According to another aspect of an embodiment of the present application, a hot pressing device is provided, comprising a base and a heating component as described above and arranged on the base.
[0016] Optionally, the first heating plate of the heating assembly is fixed on the base, and the hot pressing device further comprises a driving assembly connected to the second heating plate of the heating assembly to drive the second heating plate to move closer to or away from the first heating plate.
[0017] The beneficial effects of this application include:
[0018] The present application provides a heating assembly, including: a first heating plate and a second heating plate, the first heating plate and the second heating plate are respectively used to clamp the heated part on both sides of the heated part and heat the heated part, and at least one of the first heating plate and the second heating plate is a flexible heating plate. The heating assembly sets at least one of the first heating plate and the second heating plate as a flexible heating plate, and after the flexible heating plate contacts the part to be clamped, when it continues to move toward the part to be clamped, it will make adaptive deformation according to the surface shape of the part to be clamped, so as to better fit the surface of the part to be clamped, so that the heated part is heated evenly. Therefore, the above heating assembly is not only applicable to the heated part with a flat surface, but also to the heated part with a curved surface, and can make the heated part with a curved surface also heated evenly. When the heated part is a winding core of a lithium battery, the flexible heating plate can heat each position of the winding core evenly, and the temperature rise rate of each point on the winding core is consistent, so that the heat conduction inside the winding core is more consistent, and the bonding effect between the diaphragm and the pole piece is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of a first heating plate and a second heating plate in a heating assembly provided in an embodiment of the present application being separated from each other;
[0021] Figure 2 A schematic diagram of a first heating plate and a second heating plate in a heating assembly provided in an embodiment of the present application being buckled with each other;
[0022] Figure 3 A schematic diagram showing that the third heating plate and the fourth heating plate in the heating assembly provided in an embodiment of the present application are separated from each other;
[0023] Figure 4 A schematic diagram of the third heating plate and the fourth heating plate clamping the pole ears in the heating assembly provided in an embodiment of the present application.
[0024] Icons: 100 - heating assembly; 110 - first heating plate; 120 - second heating plate; 130 - pole ear heating plate; 131 - third heating plate; 132 - fourth heating plate; 200 - part to be heated; 210 - winding core; 220 - pole ear; 221 - positive pole ear; 222 - negative pole ear. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 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 this application can be understood according to specific circumstances.
[0030] In one aspect of the embodiment of the present application, please refer to Figure 1 , a heating assembly 100 is provided, comprising: a first heating plate 110 and a second heating plate 120, the first heating plate 110 and the second heating plate 120 are respectively used to clamp the heated member 200 on both sides of the heated member 200 and heat the heated member 200, at least one of the first heating plate 110 and the second heating plate 120 is a flexible heating plate.
[0031] Generally speaking, the heating assembly 100 is arranged on a base. The heating assembly 100 is used to process the part to be heated 200, which may be a roll core 210 of a lithium battery or other parts to be heated. The heating assembly 100 includes a first heating plate 110 and a second heating plate 120 arranged opposite to each other, and both the first heating plate 110 and the second heating plate 120 can heat the part to be heated 200. At least one of the first heating plate 110 and the second heating plate 120 can be moved under the drive of the driving assembly so that the first heating plate 110 and the second heating plate 120 can be moved closer to or farther from each other.
[0032] When the first heating plate 110 and the second heating plate 120 are far away from each other, the user can place the member to be heated 200 between the first heating plate 110 and the second heating plate 120; after the member to be heated 200 is placed, the driving component drives the first heating plate 110 and the second heating plate 120 to approach each other, thereby clamping the member to be heated 200 and heating the member to be heated 200.
[0033] Please refer to Figure 2 , at least one of the first heating plate 110 and the second heating plate 120 is a flexible heating plate. After the flexible heating plate contacts the part to be clamped, when it continues to move toward the part to be clamped, it will make adaptive deformation according to the surface shape of the part to be clamped, so as to better fit the surface of the part to be clamped, so that the part to be heated 200 is heated evenly. Therefore, the above-mentioned heating assembly 100 is not only applicable to the part to be heated 200 with a flat surface, but also to the part to be heated 200 with a curved surface, and can make the part to be heated 200 with a curved surface also heated evenly. When the part to be heated 200 is a reel 210 of a lithium battery, the flexible heating plate can heat each position of the reel 210 evenly, and the temperature rise rate of each point on the reel 210 is consistent, thereby making the internal heat conduction of the reel 210 more consistent, and the bonding effect between the diaphragm and the pole piece is better.
[0034] Optionally, the first heating plate 110 and the second heating plate 120 are both flexible heating plates.
[0035] Setting the first heating plate 110 and the second heating plate 120 as flexible heating plates can better adapt to the two opposite surfaces of the heated part 200, so that the first heating plate 110 and the second heating plate 120 can both fit with the surface of the heated part 200, so that the heating component 100 can transfer heat to the heated part 200 more evenly.
[0036] Optionally, the heating assembly 100 is configured on a base, the first heating plate 110 is fixed on the base, and the second heating plate 120 is used to be connected to the driving assembly to move closer to or farther away from the first heating plate 110 under the drive of the driving assembly.
[0037] The first heating plate 110 is fixed, the second heating plate 120 is movable, and the driving assembly is only used to drive the second heating plate 120 to move, which can make it easier to control the first heating plate 110 and the second heating plate 120 to move closer or farther from each other, and also make the structure of the driving assembly simpler. When heating, the heated part 200 can be directly placed on the first heating plate 110, and then the driving assembly can be controlled to drive the second heating plate 120 to move toward the first heating plate 110 to press the heated part 200.
[0038] Optionally, the first heating plate 110 and the second heating plate 120 can be buckled with each other, and the surfaces of the first heating plate 110 and the second heating plate 120 that are close to each other after buckling are respectively in contact with the part to be heated 200 .
[0039] When the first heating plate 110 and the second heating plate 120 are buckled together, a closed space can be formed between the two, and the heated component 200 is located in the closed space. The surface of the first heating plate 110 facing the second heating plate 120 and the surface of the second heating plate 120 facing the first heating plate 110 are respectively fitted with the surface of the heated component 200, and the surface of the heated component 200 can be completely wrapped, thereby further improving the temperature uniformity of the heated component 200. At the same time, the first heating plate 110 and the second heating plate 120 can also be used to heat press the heated component 200 to change the heated component 200 into a preset shape.
[0040] Optionally, please refer to Figure 3 and Figure 4 The heated component 200 is a winding core 210 , and the heating assembly 100 further includes a tab heating plate 130 , which is used to heat the tab 220 on the winding core 210 .
[0041] While the winding core 210 is heated, the tabs 220 are also heated synchronously. The tabs 220 are used to transfer heat to the interior of the winding core 210 , which can further improve the uniformity of heat transfer.
[0042] Optionally, the tab heating plate 130 includes a third heating plate 131 and a fourth heating plate 132 opposite to the third heating plate 131 , and the third heating plate 131 and the fourth heating plate 132 are respectively used to clamp the tab 220 at both sides of the tab 220 and heat the tab 220 .
[0043] The third heating plate 131 and the fourth heating plate 132 can both heat the heating member 200. At least one of the third heating plate 131 and the fourth heating plate 132 can be moved by the driving assembly so that the third heating plate 131 and the fourth heating plate 132 can be moved closer to or farther from each other.
[0044] When the third heating plate 131 and the fourth heating plate 132 are far away from each other, the user can place the pole ear 220 between the third heating plate 131 and the fourth heating plate 132; after the pole ear 220 is placed, the driving component drives the third heating plate 131 and the fourth heating plate 132 to approach each other, thereby clamping the pole ear 220 and heating the pole ear 220.
[0045] Optionally, at least one of the third heating plate 131 and the fourth heating plate 132 is a flexible heating plate.
[0046] At least one of the third heating plate 131 and the fourth heating plate 132 is a flexible heating plate. After the flexible heating plate contacts the pole lug 220 and continues to move toward the pole lug 220, it will make adaptive deformation according to the surface shape of the pole lug 220, so as to better fit the surface of the pole lug 220 and make the pole lug 220 heated evenly.
[0047] Optionally, there are two groups of tab heating plates 130, one group of tab heating plates 130 is used to heat the positive tab 221, and the other group of tab heating plates 130 is used to heat the negative tab 222. In this way, the positive tab 221 and the negative tab 222 can be heated more conveniently.
[0048] This embodiment also provides a heat pressing device, please refer to Figure 1 and Figure 2 , comprising a base and a heating component 100 as described above and arranged on the base.
[0049] The hot pressing device includes the same structure and benefits as the heating assembly 100 in the previous embodiment. The structure and benefits of the heating assembly 100 have been described in detail in the previous embodiment and will not be repeated here.
[0050] Optionally, the first heating plate 110 of the heating assembly 100 is fixed on the base, and the hot pressing device further includes a driving assembly connected to the second heating plate 120 of the heating assembly 100 to drive the second heating plate 120 to move closer to or away from the first heating plate 110 .
[0051] Such a configuration makes it easier to control the first heating plate 110 and the second heating plate 120 to move closer or farther from each other, and also makes the structure of the driving component simpler. When heating, the heated part 200 can be directly placed on the first heating plate 110, and then the driving component can be controlled to drive the second heating plate 120 to move toward the first heating plate 110 to press the heated part 200.
[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A heating component, characterized in that: include: A first heating plate and a second heating plate, wherein the first heating plate and the second heating plate are respectively used to clamp the heated member on both sides of the heated member and heat the heated member, and at least one of the first heating plate and the second heating plate is a flexible heating plate.
2. The heating assembly according to claim 1, characterized in that The first heating plate and the second heating plate are both flexible heating plates.
3. The heating assembly according to claim 1, characterized in that The heating component is arranged on a base, the first heating plate is fixed on the base, and the second heating plate is used to be connected with a driving component so as to be driven by the driving component to approach or move away from the first heating plate.
4. The heating assembly according to claim 1, characterized in that The first heating plate and the second heating plate can be buckled with each other, and the surfaces of the first heating plate and the second heating plate that are close to each other after buckling are respectively in contact with the part to be heated.
5. The heating assembly according to any one of claims 1 to 4, characterized in that: The part to be heated is a winding core, and the heating assembly further comprises a tab heating plate, which is used to heat the tabs on the winding core.
6. The heating assembly according to claim 5, characterized in that The tab heating plate includes a third heating plate and a fourth heating plate opposite to the third heating plate, and the third heating plate and the fourth heating plate are respectively used to clamp the tab at both sides of the tab and heat the tab.
7. The heating assembly according to claim 6, characterized in that At least one of the third heating plate and the fourth heating plate is a flexible heating plate.
8. The heating assembly according to claim 5, characterized in that The number of the tab heating plates is two groups, one group of the tab heating plates is used to heat the positive tab, and the other group of the tab heating plates is used to heat the negative tab.
9. A hot pressing device, characterized in that: The invention comprises a base and a heating assembly according to any one of claims 1 to 8 arranged on the base.
10. The hot pressing device according to claim 9, characterized in that: The first heating plate of the heating assembly is fixed on the base, and the hot pressing device further comprises a driving assembly connected to the second heating plate of the heating assembly to drive the second heating plate to approach or move away from the first heating plate.