Packaging module and packaging mold

Abstract

The application relates to the technical field of battery packaging, in particular to a packaging module and a packaging mold, which are used for injection packaging of the head of a battery to be packaged. The packaging module comprises a module assembly, the module assembly comprises a module body, an elastic piece and a pressure maintaining piece, the pressure maintaining piece is arranged on the side of the module body facing the battery to be packaged in a first direction, and the elastic piece is press-fitted between the module body and the pressure maintaining piece. According to the packaging module and the packaging mold, the repeated mold opening cost caused by strict thickness matching of the traditional mold is avoided, the problems of injection material leakage and packaging failure caused by thickness deviation are effectively solved, the influence of processing error is reduced to the minimum, and the yield and production efficiency of battery packaging are greatly improved.

Description

Technical Field

[0001] This application relates to the field of battery packaging technology, and in particular to a packaging module and packaging mold. Background Technology

[0002] In modern battery manufacturing, injection molding sealing of the battery head is a crucial step in ensuring battery safety and electrical performance. Battery head injection molding sealing typically refers to constructing a sealed structure in the battery head area using specific injection molding processes and materials. This isolates the battery head electrodes from direct contact with the external environment, preventing safety hazards such as short circuits and leakage, while also enhancing the battery's stability and reliability in complex operating environments. Currently, battery encapsulation molds are commonly used tools for achieving battery head injection molding sealing. These molds involve injection molding and pressing the material within the confined space of the mold, ensuring a tight fit to the battery head and thus completing the injection seal.

[0003] However, current battery molds are typically designed and manufactured based on specific battery thicknesses, exhibiting a strict matching relationship with the battery thickness. When battery thickness changes due to design alterations, model updates, or other reasons, the original molds become unusable, necessitating redesign and remanufacturing. This significantly increases production costs and extends product development and production cycles. Furthermore, unavoidable processing errors during battery manufacturing result in variations in battery thickness. If the battery thickness exceeds the mold's design tolerance, the mold may fail to clamp the battery securely, leading to leakage of injection molding material during encapsulation and ultimately, encapsulation failure. This severely impacts battery production yield and efficiency. Utility Model Content

[0004] The purpose of this application is to provide a packaging module and packaging mold to address, to some extent, the existing battery molds that are typically designed and manufactured based on a specific battery thickness, exhibiting a strict matching relationship with the battery thickness. When the thickness of the battery product changes due to design changes, model updates, or other reasons, the original mold becomes unusable, requiring redesign and remanufacturing. This not only significantly increases production costs but also extends product development and production cycles. Furthermore, if the battery thickness exceeds the mold's design tolerance, the mold may fail to clamp the battery, leading to issues such as leakage of injection molding material during packaging, ultimately resulting in packaging failure and severely impacting battery production yield and efficiency.

[0005] According to a first aspect of this application, a packaging module is provided for injection molding packaging of the head of a battery to be packaged. The packaging module includes a module body, an elastic element, and a pressure-holding element. The pressure-holding element is disposed on the side of the module body facing the battery to be packaged in a first direction, and the elastic element is press-fitted between the module body and the pressure-holding element.

[0006] Preferably, the module body is provided with a mounting groove, and the pressure-holding component is disposed in the mounting groove.

[0007] Preferably, the mounting groove includes a first groove portion and a second groove portion that are connected to each other, wherein the first groove portion is disposed on the side of the mounting groove away from the battery to be packaged; In the second direction, the size of the first groove is larger than the size of the second groove, so that limiting bosses are formed on the two inner walls of the mounting groove in the second direction, and the second direction intersects with the first direction; At least a portion of the pressure-holding member is disposed in the first groove and engages with the limiting boss, and the size of at least a portion of the pressure-holding member is smaller than the size of the first groove in a first direction.

[0008] Preferably, the pressure-holding member includes a snap-fit ​​portion and a connecting portion connected to each other along the first direction, the snap-fit ​​portion being disposed in the first groove portion and the connecting portion being disposed in the second groove portion.

[0009] Preferably, the snap-fit ​​portion and the connecting portion are detachably connected; The pressure-holding component also includes one or more gasket portions, which can be placed between the snap-fit ​​portion and the connecting portion.

[0010] Preferably, the pressure-holding component further includes a flexible overlay portion, which covers the side of the connector opposite to the snap-fit ​​portion.

[0011] Preferably, the module further includes a sealing block, which is fixedly disposed at one end of the module body in the second direction. When the encapsulation module is in the encapsulation state, the sealing block is disposed corresponding to the head of the battery to be encapsulated.

[0012] Preferably, one end of the flexible adhesive portion opposite to the connecting portion extends from the mounting groove along the second direction to the sealing block.

[0013] According to a second aspect of this application, a packaging mold is provided, which includes the packaging module described in any of the above technical solutions, and thus has all the beneficial technical effects of the packaging module, which will not be repeated here.

[0014] Preferably, the packaging mold includes a first module and a second module, both of which can be press-fitted onto both sides of the battery to be packaged along the first direction; Wherein, at least one of the first module and the second module is the encapsulation module.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The encapsulation module provided in this application uses an elastic element press-fitted between the module body and the pressure-holding component. On the one hand, when the thickness of the battery to be encapsulated changes due to design changes or model updates, the elastic element can adjust the position of the pressure-holding component through its own deformation (such as compression or extension), maintaining a dynamic balance in the contact pressure between the pressure-holding component and the battery head. This eliminates the need to redesign or manufacture molds for batteries of different thicknesses, avoiding the repeated mold-making costs associated with strict thickness matching in traditional molds, significantly reducing production costs, and is particularly suitable for flexible production scenarios involving multiple battery models. On the other hand, unavoidable thickness deviations during battery processing can lead to "clamping failure" issues with traditional molds, while the buffering effect of the elastic element allows the pressure-holding component to adaptively adjust within a certain thickness range. Even if the battery thickness exceeds the original design range, the elastic deformation of the elastic element ensures a tight fit between the pressure-holding component and the battery head, maintaining the sealing pressure during injection molding. This effectively solves problems such as leakage of injection molding material and encapsulation failure caused by thickness deviations, minimizing the impact of processing errors and significantly improving the yield and production efficiency of battery encapsulation.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the packaging module provided in an embodiment of this application; Figure 2 This is a side view of the packaging module provided in an embodiment of this application; Figure 3 This is an isometric structural schematic diagram of the pressure-holding component provided in the embodiments of this application; Figure 4 This is a front view of the packaging module provided in an embodiment of this application; Figure 5for Figure 4 A schematic diagram of the cross-sectional structure obtained by cutting the provided packaging module along the AA direction; Figure 6 for Figure 4 A schematic diagram of the cross-sectional structure obtained by cutting the provided packaging module along the BB direction; Figure 7 Another exploded view of the packaging module provided in the embodiments of this application; Figure 8 This is an exploded structural diagram of the packaging mold provided in an embodiment of this application.

[0019] Figure label: 1-First module; 11-Module body; 110-Installation slot; 111-First slot; 112-Second slot; 12-Elastic element; 13-Pressure holding element; 131-Snap-fit ​​part; 132-Connecting part; 133-Flexible encapsulation part; 14-Sealing block; 15-Installation frame; 16-Fixing base; 2-Battery to be encapsulated; 3-Second module.

[0020] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following reference Figures 1 to 8 This application describes a packaging module and packaging mold according to some embodiments.

[0027] See Figures 1 to 8 As shown, an embodiment of the first aspect of this application provides a packaging module for injection molding packaging of the head of a battery 2 to be packaged. The packaging module includes a module assembly, which includes a module body 11, an elastic member 12, and a pressure-holding member 13. The pressure-holding member 13 is disposed on the side of the module body 11 facing the battery 2 to be packaged in a first direction F1. The elastic member 12 is press-fitted between the module body 11 and the pressure-holding member 13.

[0028] According to the aforementioned technical features, the encapsulation module is press-fitted between the module body 11 and the pressure-holding component 13 by an elastic element 12. On the one hand, when the thickness of the battery 2 to be encapsulated changes due to design changes or model updates, the elastic element 12 can adjust the position of the pressure-holding component 13 through its own deformation (such as compression or extension), so that the contact pressure between the pressure-holding component 13 and the battery head remains dynamically balanced. This eliminates the need to redesign or manufacture molds for batteries of different thicknesses, avoiding the repeated mold-making costs caused by strict thickness matching in traditional molds, significantly reducing production costs, and is particularly suitable for flexible production scenarios involving multiple battery models. On the other hand, unavoidable thickness deviations during battery processing can lead to "clamping failure" problems in traditional molds, while the buffering effect of the elastic element 12 allows the pressure-holding component 13 to adaptively adjust within a certain thickness range. Even if the battery thickness exceeds the original design range, the elastic deformation of the elastic element 12 can ensure that the pressure-holding component 13 fits tightly against the battery head, maintaining the sealing pressure during injection molding, effectively solving problems such as leakage of injection molding material and encapsulation failure caused by thickness deviations, minimizing the impact of processing errors, and significantly improving the yield and production efficiency of battery encapsulation.

[0029] like Figures 1 to 8As shown in the figure, F1 can be an example of the first direction F1 described above. For ease of description, two intersecting directions on a plane perpendicular to the first direction F1 are defined as the second direction F2 and the third direction F3, respectively. F2 shown in the figure can be an example of the second direction F2, and F3 shown in the figure can be an example of the third direction F3. Preferably, the second direction F2 and the third direction F3 are perpendicular to each other to accommodate most square battery structures to be packaged 2.

[0030] Optionally, the aforementioned elastic element may be a helical spring, wave spring, disc spring, or other elastic structure.

[0031] Preferably, such as Figure 1 , Figure 2 and Figures 5 to 7 As shown, the module body 11 can be provided with a mounting groove 110, and the pressure holding member 13 can be provided in the mounting groove 110. In this way, the flatness of the side of the module assembly facing the battery 2 to be packaged is ensured, and the battery 2 to be packaged is avoided from being damaged during the process of the module assembly acting on the surface of the battery 2 to be packaged.

[0032] Preferably, such as Figure 1 As shown, the aforementioned mounting groove 110 may include a first groove portion 111 and a second groove portion 112 that are connected to each other. The first groove portion 111 is disposed on the side of the mounting groove 110 away from the battery 2 to be packaged. In the second direction F2, the size of the first groove portion 111 is larger than the size of the second groove portion 112, so that limiting bosses are formed on the two inner walls of the mounting groove 110 in the second direction F2. At least a portion of the pressure-holding member 13 is disposed in the first groove 111 and engages with the limiting boss. In the first direction F1, the size of at least a portion of the pressure-holding member 13 is smaller than the size of the first groove 111. Thus, on the one hand, by disposing of at least a portion of the pressure-holding member 13 in the first groove 111 and engaging with the limiting boss, the connection between the module body 11 and the pressure-holding member 13 is effectively realized. On the other hand, by making the size of at least a portion of the pressure-holding member 13 in the first direction F1 smaller than the size of the first groove 111, the elastic member 12 can be compressed or extended more freely in this space, allowing the pressure-holding member 13 to adapt more flexibly to battery thickness fluctuations, giving full play to the adaptive adjustment function of the elastic member 12, further enhancing the adaptability of the packaging module to batteries of different thicknesses, reducing packaging failures caused by battery thickness deviations, and improving the yield rate of battery production.

[0033] Preferably, such as Figures 1 to 3As shown, the pressure-holding member 13 may include a snap-fit ​​portion 131 and a connecting portion 132 connected to each other along the first direction F1. The snap-fit ​​portion 131 is disposed in the first groove portion 111, and the connecting portion 132 is disposed in the second groove portion 112. In other words, the snap-fit ​​portion 131 is at least a part of the pressure-holding member 13.

[0034] Preferably, such as Figure 1 and Figure 2 As shown, the first groove 111 can penetrate the module body 11 along the third direction F3, thus facilitating the insertion of the snap-fit ​​part 131 into the first groove 111.

[0035] Preferably, such as Figure 1 and Figure 3 As shown, the connecting part 132 may be provided with a groove, and the snap-fit ​​part 131 may be provided in the groove. On the one hand, this effectively increases the connection area between the connecting part 132 and the snap-fit ​​part 131, ensuring the connection stability between the connecting part 132 and the snap-fit ​​part 131; on the other hand, it effectively reduces the space occupancy rate of the pressure-holding member 13.

[0036] Preferably, such as Figure 1 , Figure 3 and Figure 6 As shown, the groove can be located at the center of the connecting part 132 in the third direction F3 to ensure the uniformity of force and the stability of the placement of the connecting part 132.

[0037] Preferably, such as Figure 1 and Figure 2 As shown, on the third direction F3, the size of the latching portion 131 is smaller than the size of the connecting portion 132, so that at least a portion of each end of the connecting portion 132 on the third direction F3 protrudes relative to the latching portion 131. Figure 1 and Figure 6 As shown, the elastic element 12 can be press-fitted between the connecting part 132 and the module body 11.

[0038] Preferably, such as Figure 1 , Figure 3 and Figure 6 As shown, the connecting part 132 may also be provided with a slot extending along the first direction F1, and one end of the elastic member 12 may be fixed in the slot to ensure the stability of the elastic member 12.

[0039] Preferably, such as Figure 1 , Figure 6 and Figure 7 As shown, the portion of the connecting part 132 located on both sides of the snap-fit ​​part 131 in the third direction F3 is provided with the above-mentioned slots, and each slot is provided with the above-mentioned elastic element 12 to ensure the uniformity of the elastic force borne by the connecting part 132.

[0040] Preferably, such as Figure 1 , Figure 3 and Figure 7 As shown, the snap-fit ​​part 131 and the connecting part 132 are detachably connected. On the one hand, this enables the interchangeability of the connecting part 132 and the snap-fit ​​part 131, improves the maintainability of the module component, and effectively extends the service life of the module component. On the other hand, it facilitates and simplifies the assembly operation of the connecting part 132, the snap-fit ​​part 131 and the module body 11.

[0041] Preferably, the connecting part 132 and the snap-fit ​​part 131 can be fastened together by fasteners such as bolts to make the connecting part 132 and the snap-fit ​​part 131 detachable and to ensure the connection stability of the connecting part 132 and the snap-fit ​​part 131.

[0042] Preferably, as not shown in the figure, the pressure-holding member 13 may further include one or more gasket portions. The gasket portions can be placed between the snap-fit ​​portion 131 and the connecting portion 132. When the thickness deviation of the battery 2 to be packaged is greater than the gap size between the snap-fit ​​portion 131 and the first groove portion 111 in the first direction F1, the size of the pressure-holding member 13 protruding relative to the module body 11 in the first direction F1 can be increased by setting the gasket portions, so as to further compensate for the thickness deviation of the battery 2 to be packaged, and enable the pressure-holding member 13 to clamp the battery 2 to be packaged.

[0043] Preferably, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the pressure-holding component 13 may also include a flexible encapsulation portion 133, which can cover the side of the connecting portion 132 opposite to the snap-fit ​​portion 131. In this way, the pressure-holding component 13 contacts the battery 2 to be packaged through the flexible encapsulation portion 133, which can effectively prevent the pressure-holding component 13 from scratching or damaging the battery 2 to be packaged during the packaging process.

[0044] Optionally, the flexible overlay portion 133 can be made of flexible materials such as urethane, rubber, or silicone.

[0045] Preferably, the side of the connecting portion 132 facing the flexible overlay portion 133 may be provided with an injection hole extending along the first direction F1. The flexible overlay portion 133 can be overlaid on the surface of the connecting portion 132. That is, in addition to the part of the flexible overlay portion 133 covering the surface of the connecting portion 132, it also includes the part injected into the injection hole. This can effectively ensure the connection stability between the flexible overlay portion 133 and the connecting portion 132.

[0046] Preferably, such as Figure 1 , Figure 2 and Figure 5 As shown, the above-mentioned module component may further include a sealing block 14. The sealing block 14 can be fixedly disposed at one end of the module body 11 in the second direction F2. When the encapsulation module is in the encapsulation state, the sealing block 14 is correspondingly disposed with the head of the battery 2 to be encapsulated. Thus, the sealing block 14 is fixedly disposed at one end of the module body 11 in the second direction F2 and corresponds with the head of the battery 2 to be encapsulated. During the encapsulation process, the sealing block 14 can form additional sealing pressure around the battery head. When the injection molding material is injected into the mold, the sealing block 14 can effectively restrict the material from flowing to the outside of the battery head, avoiding the problem of injection molding material leakage caused by uneven pressure. This solves the problem of encapsulation failure caused by material overflow in traditional encapsulation, and greatly improves the success rate and yield of battery encapsulation.

[0047] It should be noted that the structure of the sealing block 14 described above is the existing structure of the encapsulation module and will not be described again here.

[0048] Preferably, such as Figure 2 , Figure 5 and Figure 7 As shown, one end of the flexible encapsulation portion 133 opposite to the connecting portion 132 extends from the mounting groove 110 along the second direction F2 to the sealing block 14. During the process of the encapsulation module pressing the battery 2 to be encapsulated, under the action of the sealing block 14, the electrolyte inside the battery 2 to be encapsulated flows from the battery 2 to the tail end of the battery 2 along the second direction F2. Thus, the flexible encapsulation portion 133 extends to the encapsulation module, thereby forming a flexible buffer area at the end of the encapsulation module near the sealing block 14, thereby effectively preventing wrinkles or indentations from appearing on the surface of the battery 2 to be encapsulated due to electrolyte flow during the encapsulation process.

[0049] Optionally, the above-mentioned encapsulation module may further include a mounting frame 15 and a plurality of the above-mentioned module components. The mounting frame 15 is provided with a plurality of mounting slots 110, and a module component is embedded in each mounting slot 110. In this way, the encapsulation film block can simultaneously meet the encapsulation operation of multiple batteries 2 to be encapsulated, thereby improving the encapsulation efficiency.

[0050] Optionally, the above-mentioned encapsulation module may further include a fixing base 16, on which the above-mentioned mounting frame 15 is fixed.

[0051] See Figure 8 The second aspect of this application also provides a packaging mold, which includes the packaging module described in any of the above embodiments, and thus has all the beneficial technical effects of the packaging module, which will not be repeated here.

[0052] Preferably, such as Figure 8As shown, the above-mentioned encapsulation mold may include a first module 1 and a second module 3. The first module 1 and the second module 3 can be press-fitted onto both sides of the battery 2 to be encapsulated along the first direction F1 to achieve the encapsulation sealing of the encapsulation mold.

[0053] Preferably, at least one of the first module 1 and the second module 3 can be the encapsulation module.

[0054] like Figure 8 As shown in the figure, the first module 1 is an example of the above-mentioned encapsulation module.

[0055] It should be noted that the other structures of the first module 1 and the second module 3 mentioned above are all existing technologies in this field, and will not be described in detail here.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A packaging module, characterized in that, The injection molding encapsulation of the head of the battery to be encapsulated includes a module body, an elastic element, and a pressure-holding element. The pressure-holding element is disposed on the side of the module body facing the battery to be encapsulated in a first direction, and the elastic element is press-fitted between the module body and the pressure-holding element.

2. The packaging module according to claim 1, characterized in that, The module body is provided with a mounting groove, and the pressure-holding component is disposed in the mounting groove.

3. The packaging module according to claim 2, characterized in that, The mounting groove includes a first groove portion and a second groove portion that are connected to each other, wherein the first groove portion is disposed on the side of the mounting groove away from the battery to be packaged; In the second direction, the size of the first groove is larger than the size of the second groove, so that limiting bosses are formed on the two inner walls of the mounting groove in the second direction, and the second direction intersects with the first direction; At least a portion of the pressure-holding member is disposed in the first groove and engages with the limiting boss, and the size of at least a portion of the pressure-holding member is smaller than the size of the first groove in a first direction.

4. The packaging module according to claim 3, characterized in that, The pressure-holding component includes a snap-fit ​​portion and a connecting portion connected to each other along the first direction. The snap-fit ​​portion is disposed in the first groove portion, and the connecting portion is disposed in the second groove portion.

5. The packaging module according to claim 4, characterized in that, The snap-fit ​​portion and the connecting portion are detachably connected; The pressure-holding component also includes one or more gasket portions, which can be placed between the snap-fit ​​portion and the connecting portion.

6. The packaging module according to claim 4, characterized in that, The pressure-holding component also includes a flexible overlay portion, which covers the side of the connector opposite to the snap-fit ​​portion.

7. The packaging module according to claim 6, characterized in that, It also includes a sealing block, which is fixedly disposed at one end of the module body in the second direction. When the encapsulation module is in the encapsulation state, the sealing block is disposed corresponding to the head of the battery to be encapsulated.

8. The packaging module according to claim 7, characterized in that, One end of the flexible overlay portion opposite to the connecting portion extends from the mounting groove along the second direction to the sealing block.

9. A packaging mold, characterized in that, Includes the packaging module according to any one of claims 1 to 8.

10. The packaging mold according to claim 9, characterized in that, The packaging mold includes a first module and a second module, both of which can be press-fitted onto both sides of the battery to be packaged along the first direction; Wherein, at least one of the first module and the second module is the encapsulation module.

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