A packaging component and a battery cell packaging device
By optimizing the structure of the packaging components, the problem of poor packaging effect caused by the difference in the thickness of the packaging film of the soft-pack battery cell was solved, achieving more efficient and tighter packaging, and improving packaging quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HU ZHOU YAO NING GU TAI DIAN CHI YAN JIU YUAN YOU XIAN GONG SI
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-03
Smart Images
Figure CN224458133U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of soft-pack battery cell packaging technology, specifically to a packaging component and battery cell packaging equipment. Background Technology
[0002] With the rapid development of the new energy sector, battery cells, as the core of new energy, are also constantly innovating. For pouch cells, a series of manufacturing processes are required before they can be produced, the most important of which is formation and activation. During formation, complex chemical reactions occur between the positive and negative electrode materials and the electrolyte, generating gases during the formation of the SEI film and side reactions. Therefore, during cell manufacturing, a portion of the cell's encapsulation film is reserved as a gas pocket to store the gases generated during formation. These gases are then removed by evacuation. Finally, before the cell is produced, final encapsulation is performed, the gas pocket is cut off, and the final cell form is achieved.
[0003] However, in order to save materials when encapsulating pouch cells, the thickness of the encapsulation film forming the air bag is usually smaller than that of the encapsulation film forming the cell. In other words, there is a height difference in the thickness of the encapsulation film in different areas. This results in poor encapsulation effect between the encapsulation films when using encapsulation components to encapsulate the pouch cells and air bags. Utility Model Content
[0004] In view of this, this application provides a packaging component that solves the problem of poor encapsulation effect of the packaging film in pouch cells. This application also provides a cell packaging device including the above-described packaging component.
[0005] To achieve the above objectives, this application provides the following technical solution:
[0006] An encapsulation assembly is used to encapsulate a first encapsulation film for a pouch battery cell and a second encapsulation film for forming an air pocket, wherein the thickness of the first encapsulation film is greater than the thickness of the second encapsulation film, wherein:
[0007] The encapsulation assembly includes two encapsulation components arranged opposite to each other. Each encapsulation component includes a first encapsulation segment for encapsulating the first encapsulation film and a second encapsulation segment for encapsulating the second encapsulation film, and the distance between the two first encapsulation segments is greater than the distance between the two second encapsulation segments.
[0008] Optionally, a first heating element is provided on the side of the first encapsulation segment opposite to the first encapsulation film, and a second heating element is provided on the side of the second encapsulation segment opposite to the second encapsulation film, wherein the number and / or power of the first heating element is greater than that of the second heating element.
[0009] Optionally, each of the encapsulation components includes a transition section connecting the first encapsulation segment and the second encapsulation segment, the transition section being used to encapsulate the second encapsulation film.
[0010] Optionally, an anti-stick layer is provided on the surface of the transition section and the second encapsulation section facing the second encapsulation film.
[0011] Optionally, the distance between the two transition segments is less than the distance between the two first encapsulation segments and greater than the distance between the two second encapsulation segments.
[0012] Optionally, the first packaging segment is provided with a first temperature sensor, and the second packaging segment is provided with a second temperature sensor.
[0013] Optionally, the thickness of the second encapsulation segment is greater than the thickness of the first encapsulation segment, and the end of the encapsulation component facing away from the encapsulation side is a flat plate.
[0014] Optionally, the first encapsulation segment, the second encapsulation segment, and the transition segment are integrally formed.
[0015] Optionally, the first encapsulation segment is connected to the transition segment via a first chamfer, and the second encapsulation segment is connected to the transition segment via a second chamfer.
[0016] A battery cell packaging device, comprising the packaging components described in any one of the above claims.
[0017] The encapsulation assembly provided in this application includes two encapsulation components arranged opposite each other. Each encapsulation component includes a first encapsulation segment for encapsulating a first encapsulation film and a second encapsulation segment for encapsulating a second encapsulation film, with the distance between the two first encapsulation segments being greater than the distance between the two second encapsulation segments. In this way, during the encapsulation of a pouch cell using the encapsulation assembly, the thicker first encapsulation film is encapsulated by the larger distance between the first encapsulation segments, and the thinner second encapsulation film is encapsulated by the smaller distance between the second encapsulation segments. This ensures a tight fit between the encapsulation assembly and both the first and second encapsulation films, thereby improving the encapsulation effect of the encapsulation assembly on both the first and second encapsulation films. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the first encapsulation film and the second encapsulation film provided in this embodiment;
[0020] Figure 2This is a schematic diagram of the package structure;
[0021] Figure 3 A schematic diagram of the structure for encapsulating the first and second encapsulation films of the encapsulation component;
[0022] Figure 4 A schematic diagram of the structure for forming an air pocket in a battery cell;
[0023] Figure 5 This is a schematic diagram of the finished battery cell.
[0024] exist Figures 1 to 5 middle:
[0025] 1-Packaging component, 2-First packaging film, 3-Second packaging film, 4-Air bag, 5-Battery cell;
[0026] 11-First encapsulation section, 12-Second encapsulation section, 13-Transition section, 14-First heating element, 15-Second heating element, 16-Anti-stick layer, 17-First temperature sensor, 18-Second temperature sensor. Detailed Implementation
[0027] This application provides a packaging component that solves the problem of poor encapsulation effect of the packaging film in pouch cells. This application also provides a cell packaging device including the above-described packaging component.
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] like Figures 1 to 5As shown, this application embodiment provides a packaging component for packaging a first packaging film 2 for packaging a soft-pack battery cell 5 and a second packaging film 3 for packaging to form an air bag 4. The first packaging film 2 is used to package the soft-pack battery, and the second packaging film 3 is used to package the air bag 4. The first packaging film 2 typically includes an outer PET layer, a middle AL layer, and an inner PP layer. Since the second packaging film 3 is used to form the air bag 4, the air bag 4 will be cut after the battery cell 5 is deflated. In order to save materials and reduce costs, the second packaging film 3 is usually made of PP layer, so the thickness of the first packaging film 2 is greater than the thickness of the second packaging film 3. Specifically, the encapsulation assembly includes two encapsulation components 1 arranged opposite to each other. Each encapsulation component 1 includes a first encapsulation segment 11 for encapsulating a first encapsulation film 2 and a second encapsulation segment 12 for encapsulating a second encapsulation film 3. That is, the two first encapsulation films 2 to be encapsulated are sealed by the two oppositely arranged first encapsulation segments 11, and the two second encapsulation films 3 to be encapsulated are sealed by the two oppositely arranged second encapsulation segments 12. Furthermore, the distance between the two first encapsulation segments 11 is greater than the distance between the two second encapsulation segments 12. This arrangement ensures that when the encapsulation assembly seals the first encapsulation films 2 and 3, it ensures that the first encapsulation segment 11 of the encapsulation assembly adheres to the first encapsulation film 2, while simultaneously ensuring that the second encapsulation segment 12 adheres to the second encapsulation film 3, thereby improving the encapsulation efficiency of the encapsulation assembly for the first encapsulation films 2 and 3. Figure 4 Area A in the diagram represents the position where the encapsulation component encapsulates the first encapsulation film 2 and the second encapsulation film 3. Figure 4 This is a schematic diagram of the encapsulation of the first encapsulation film 2 and the second encapsulation film 3. Figure 5 This is a schematic diagram of the final battery cell 5 after the air bag 4 has been cut and sealed.
[0030] It should be noted that the number of the first encapsulation film 2 and the second encapsulation film 3 is not limited here. That is, the encapsulation assembly mentioned in this application is used to seal at least two encapsulation films with different heights.
[0031] It should also be noted that the materials and types of the first encapsulation film 2 and the second encapsulation film 3 are not limited here.
[0032] It should also be noted that the connection relationship between the first encapsulation film 2 and the second encapsulation film 3 is not limited here. The first encapsulation film 2 and the second encapsulation film 3 can be bonded together, or they can be integrally formed.
[0033] In the process of encapsulating the soft-pack battery cell 5 using the above-described encapsulation assembly, the first encapsulation film 2 with a larger thickness is encapsulated through the first encapsulation segment 11 with a larger distance between them, and the second encapsulation film 3 with a smaller thickness is encapsulated through the second encapsulation segment 12 with a smaller distance between them. This allows the encapsulation assembly to tightly adhere to both the first encapsulation film 2 and the second encapsulation film 3 when encapsulating them, thereby improving the encapsulation effect of the encapsulation assembly on the first encapsulation film 2 and the second encapsulation film 3.
[0034] In some embodiments, please refer to Figure 2 A first heating element 14 is disposed on the side of the first encapsulation segment 11 opposite to the first encapsulation film 2, and a second heating element 15 is disposed on the side of the second encapsulation segment 12 opposite to the second encapsulation film 3. That is, the first heating element 14 is used to heat the first encapsulation segment 11, thereby achieving heat encapsulation of the two first encapsulation films 2; correspondingly, the second heating element 15 is used to heat the second encapsulation segment 12, thereby achieving heat encapsulation of the two second encapsulation films 3. Since the thickness of the first encapsulation film 2 is greater than the thickness of the second encapsulation film 3, when the first encapsulation segment 11 encapsulates the first encapsulation film 2 and the second encapsulation segment 12 encapsulates the second encapsulation film 3, the heat transfer efficiency of the first encapsulation segment 11 to the encapsulation position of the first encapsulation film 2 (the PP layer of the first encapsulation film 2) is lower than the heat transfer efficiency of the second encapsulation segment 12 to the encapsulation position of the second encapsulation film 3 (the PP layer of the second encapsulation film 3). Therefore, it is ensured that the number and / or power of the first heating element 14 is greater than that of the second heating element 15, that is, that the number of the first heating element 14 is greater than the number of the second heating element 15, or that the power of the first heating element 14 is greater than that of the second heating element 15, or that the number and power of the first heating element 14 are both greater than that of the second heating element 15. This arrangement is made so that the temperature of the first encapsulation section 11 is greater than the temperature of the second encapsulation section 12, thereby making the heat transfer efficiency of the first encapsulation section 11 to the encapsulation position of the first encapsulation film 2 approximately equal to the heat transfer efficiency of the second encapsulation section 12 to the encapsulation position of the second encapsulation film 3, thereby ensuring the encapsulation efficiency of the first encapsulation film 2 and the second encapsulation film 3.
[0035] In some embodiments, please refer to Figure 2 Each package 1 includes a transition segment 13 connecting the first package segment 11 and the second package segment 12. That is, the transition segment 13 enables communication between the first package segment 11 and the second package segment 12, thus allowing for a smooth transition between them. Furthermore, the transition segment 13 encapsulates the second package film 3. Specifically, the transition segments 13 of the relatively disposed package components are respectively located on both sides of the second package film 3, thereby achieving a smoother transition between the first package segment 11 and the second package segment 12.
[0036] Since the second encapsulation film 3 is typically a PP layer, and PP layers have strong adhesion during heat sealing, when the second encapsulation segment 12 and transition segment 13 of the encapsulation assembly are used to encapsulate the second encapsulation film 3, the second encapsulation segment 12 is in direct contact with the second encapsulation film 3, and the transition segment 13 may come into contact with the second encapsulation film 3 during the heat sealing process. Thus, the second encapsulation film 3, which is in a heat-molten state during heat sealing, can easily stick to the second encapsulation segment 12 or the transition segment 13. Therefore, in some embodiments, please refer to... Figure 2 An anti-stick layer 16 is provided on the surface of the transition section 13 and the second encapsulation section 12 facing the second encapsulation film 3. In this way, when the first encapsulation film 2 and the second encapsulation film 3 are sealed using the encapsulation assembly, the anti-stick layer 16 prevents the second encapsulation film 3 from sticking to the second encapsulation section 12 and the transition section 13 after heat fusion when encapsulating the second encapsulation film 3 through the second encapsulation section 12 and the transition section 13.
[0037] It should be noted that the anti-adhesive layer 16 is not limited here. For example, the anti-adhesive layer 16 may be a coating applied to the surface of the second encapsulation section 12 and the transition section 13, or the anti-adhesive layer 16 may be an anti-adhesive paper layer bonded to the surface of the second encapsulation section 12 and the transition section 13.
[0038] In some embodiments, please refer to Figure 3 The distance between the two transition sections 13 is less than the distance between the two first encapsulation sections 11, but greater than the distance between the two second encapsulation sections 12. Since the distance between the two first encapsulation sections 11 is greater than the distance between the two second encapsulation sections 12, the distance between the two transition sections 13 lies between these two distances. The transition section 13 is used to heat-seal the second encapsulation section 12, ensuring a gap exists between the transition section 13 and the second encapsulation film 3. With this configuration, when the encapsulation assembly is used to encapsulate the first encapsulation section 11 and the second encapsulation section 12, the PP layers of the second encapsulation section 12 and the first encapsulation section 11 will undergo a slight thermal expansion. By ensuring a gap exists between the transition section 13 and the second encapsulation film 3, flow space can be provided for the thermally fused second encapsulation film 3, preventing it from overflowing.
[0039] Based on the above embodiments, the end face of the transition section 13 near the second encapsulation film 3 is further configured as an inclined surface that is inclined to both the first encapsulation section 11 and the second encapsulation section 12. This further achieves a smooth transition between the first encapsulation section 11 and the second encapsulation section 12, and this configuration facilitates the processing of the encapsulation component 1 and improves the processing efficiency of the encapsulation component 1.
[0040] In some embodiments, please refer to Figure 2The first packaging section 11 is equipped with a first temperature sensor 17, and the second packaging section 12 is equipped with a second temperature sensor 18. By setting the first temperature sensor 17, the temperature of the first packaging section 11 can be detected in real time. Correspondingly, by setting the second temperature sensor 18, the temperature of the second packaging section 12 can be detected in real time. This allows for real-time temperature monitoring of the first packaging section 11 and the second packaging section 12 during the packaging of the first packaging film 2 and the second packaging film 3 by the packaging assembly, thereby enabling the first packaging section 11 and the second packaging section 12 to be adjusted to a suitable temperature.
[0041] In some embodiments, please refer to Figure 2 The thickness of the second encapsulation segment 12 is greater than the thickness of the first encapsulation segment 11, and the end of the encapsulation component 1 facing away from the encapsulation side is a flat plate. In other words, by making the thickness of the second encapsulation segment 12 greater than the thickness of the first encapsulation segment 11, the distance between the two first encapsulation segments 11 is greater than the distance between the two second encapsulation segments 12, thereby facilitating the encapsulation of the first encapsulation film 2 and the second encapsulation film 3. Furthermore, by configuring the encapsulation component 1 according to the above structure, the structure of the encapsulation component 1 is regular, facilitating its processing.
[0042] In some embodiments, please refer to Figure 2 The first encapsulation segment 11, the second encapsulation segment 12, and the transition segment 13 are integrally formed. This configuration improves the stability of the connection between the three segments, enhancing the structural stability of the encapsulation component 1. Furthermore, it also improves the airtightness of the connection between the three segments, avoiding the risk of air leakage when the encapsulation component 1 heats the first encapsulation film 2 and the second encapsulation film 3, and improving the encapsulation effect of the encapsulation component 1 on the first encapsulation film 2 and the second encapsulation film 3.
[0043] In addition, the first encapsulation segment 11, the second encapsulation segment 12 and the transition segment 13 can also be connected in other ways, such as by threaded connection, snap-fit connection or other methods.
[0044] In some embodiments, the first encapsulation segment 11 and the transition segment 13 are connected by a first chamfer (not shown in the figure), and the second encapsulation segment 12 and the transition segment 13 are connected by a second chamfer (not shown in the figure). Since the first encapsulation segment 11 is used to encapsulate the first encapsulation film 2, and the second encapsulation segment 12 is used to seal the second encapsulation film 3, by providing the aforementioned first and second chamfers, a smooth connection is achieved between the transition segment 13 and the first encapsulation segment 11, and also between the transition segment 13 and the second encapsulation segment 12. This prevents the connection point between the transition segment 13 and the first encapsulation segment 11 from tearing the first encapsulation film 2, and also prevents the connection point between the transition segment 13 and the second encapsulation segment 12 from tearing the second encapsulation film 3, thereby protecting both the first and second encapsulation films 2 and 3.
[0045] This application also provides a battery cell packaging device including the above-mentioned packaging component. The battery cell packaging device includes the above-mentioned packaging component. In the process of packaging the soft-pack battery cell 5 using the packaging component, the first packaging segment 11 with a larger distance between it packages the first packaging film 2 with a larger thickness, and the second packaging segment 12 with a smaller distance between it packages the second packaging film 3 with a smaller thickness. This allows the packaging component to tightly fit the first packaging film 2 and the second packaging film 3 when packaging the first packaging film 2 and the second packaging film 3, thereby improving the packaging effect of the packaging component on the first packaging film 2 and the second packaging film.
[0046] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0047] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.
[0048] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.
[0049] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0050] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.
[0051] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.
Claims
1. A package assembly, comprising: A first encapsulation film for encapsulating a pouch cell and a second encapsulation film for encapsulating and forming an air pocket, wherein the thickness of the first encapsulation film is greater than the thickness of the second encapsulation film, wherein: The encapsulation assembly includes two encapsulation components arranged opposite to each other. Each encapsulation component includes a first encapsulation segment for encapsulating the first encapsulation film and a second encapsulation segment for encapsulating the second encapsulation film, and the distance between the two first encapsulation segments is greater than the distance between the two second encapsulation segments.
2. The package assembly of claim 1, wherein, A first heating element is provided on the side of the first encapsulation segment opposite to the first encapsulation film, and a second heating element is provided on the side of the second encapsulation segment opposite to the second encapsulation film, wherein the number and / or power of the first heating element is greater than that of the second heating element.
3. The package assembly of claim 1, wherein, Each of the encapsulation components includes a transition section connecting the first encapsulation segment and the second encapsulation segment, the transition section being used to encapsulate the second encapsulation film.
4. The package assembly of claim 3, wherein, An anti-stick layer is provided on the surface of the transition section and the second encapsulation section facing the second encapsulation film.
5. The package assembly of claim 3, wherein, The distance between the two transition segments is less than the distance between the two first encapsulation segments, but greater than the distance between the two second encapsulation segments.
6. The package assembly of claim 1 or 3, wherein, The first packaging segment is equipped with a first temperature sensor, and the second packaging segment is equipped with a second temperature sensor.
7. The package assembly of claim 1, wherein, The thickness of the second encapsulation segment is greater than the thickness of the first encapsulation segment, and the end of the encapsulation component facing away from the encapsulation side is a flat plate.
8. The package assembly of claim 3, wherein, The first encapsulation segment, the second encapsulation segment, and the transition segment are integrally formed.
9. The package assembly of claim 3, wherein, The first encapsulation segment is connected to the transition segment via a first chamfered portion, and the second encapsulation segment is connected to the transition segment via a second chamfered portion.
10. A battery cell packaging device, characterized in that, Includes the packaging component according to any one of claims 1-9.