Soft package battery cell packaging equipment and end socket thereof

Abstract

The utility model relates to the technical field of battery cell manufacturing, and provides soft package battery cell packaging equipment and an end socket thereof. The sealing head comprises a connecting base, a packaging table is formed at the end of the connecting base, and a vibration structure is arranged on the packaging table. The vibration structure comprises a groove structure arranged on the end face of the packaging table, and the groove structure is used for enabling the gel particles to deviate from the final sealing position when vibration is applied to the packaging table. Or the vibration structure comprises a vibration block, and the vibration block is elastically connected with the packaging table. When the sealing head provided by the utility model is used for carrying out heat sealing on a battery cell, a vibration effect in the horizontal direction is applied to the sealing head through the vibration device, and the groove structure or the vibration block can enable gel particles with certain flowability to displace and deviate from a final sealing position, so that a polypropylene layer in an aluminum plastic film is completely fused, and false sealing is avoided; therefore, the use safety of the subsequent battery cell is ensured, and the defect that false sealing of the battery cell is easily caused by equipment adopted in the final sealing process in the existing curing process is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core manufacturing, in particular to a soft-package battery core packaging device and a sealing head thereof. Background Art

[0002] With the development of technology, various fields have higher requirements for the battery life of lithium batteries. Under the same mass / volume, the higher the energy density of the lithium battery, the better the battery life. Liquid batteries have made great progress in improving energy density, but their safety is still obviously insufficient with the increase in energy density. After the battery cell is short-circuited, it is easy to spontaneously ignite or even explode. In the existing technology, solid-state batteries have significant advantages in safety. Solid-state batteries are divided into polymer solid-state batteries, oxide solid-state batteries and sulfide solid-state batteries according to the type of electrolyte. Among them, polymer solid-state batteries have a simple processing technology and are easy to achieve large-scale production.

[0003] In the prior art, a curing process is usually used to achieve the gelation of the electrolyte. However, the equipment used in the final sealing process of the existing curing process is prone to false sealing of the battery cell. The reason for the false sealing is that the electrolyte is subjected to pressure during the curing process and a part of it is squeezed out of the upper end of the battery cell, so that the gel particles after the electrolyte is cured are distributed in the final sealing position, which further causes the polypropylene layer inside the aluminum-plastic film to be unable to completely dissolve, and there is a risk of false sealing. False sealing will cause the pressure-bearing capacity of the side of the battery cell to weaken. During the recycling of the battery cell, the expansion of the battery cell may cause the side to open completely, causing the battery cell to catch fire. At the same time, moisture and oxygen in the air can enter the battery cell through the false sealing position, causing side reactions inside the battery cell, thereby damaging the internal structure of the battery cell and the SEI film, causing abnormal phenomena such as flatulence and voltage drop in the battery, resulting in battery scrapping. Utility Model Content

[0004] The utility model provides a soft-package battery cell packaging device and a sealing head thereof, which are used to solve the defect that the equipment used in the final sealing process of the existing curing process easily causes false sealing of the battery cell.

[0005] On the one hand, the utility model provides a sealing head, including a connecting seat, a sealing platform is formed at the end of the connecting seat, and a vibration structure is provided on the sealing platform; the vibration structure includes a groove structure provided on the end surface of the sealing platform, and the groove structure is used to make gel particles deviate from the final sealing position when vibration is applied to the sealing platform; or, the vibration structure includes a vibration block, and the vibration block is elastically connected to the sealing platform.

[0006] According to the head provided by the utility model, the groove structure includes a first groove group and a second groove group, the first groove group includes a plurality of first grooves, and the plurality of first grooves are arranged at intervals on the end surface of the packaging table along the length direction of the packaging table, the second groove group includes a plurality of second grooves, and the plurality of second grooves are arranged at intervals on the end surface of the packaging table along the length direction of the packaging table, and the first grooves and the second grooves are arranged alternately.

[0007] According to the sealing head provided by the utility model, the depth of the first groove and the second groove are both less than or equal to 1 mm.

[0008] According to the sealing head provided by the utility model, the vibration block is elastically connected to the packaging platform through an elastic connecting piece.

[0009] According to the sealing head provided by the utility model, a plurality of the elastic connecting members are provided between the vibration block and the packaging platform, and the plurality of the elastic connecting members are arranged at intervals along the length direction of the vibration block.

[0010] According to the sealing head provided by the utility model, the elastic connecting member is a spring, a spring sheet, an elastic pad or an elastic bracket.

[0011] According to the sealing head provided by the utility model, the packaging platform is provided with a mounting groove, and the vibration block is arranged in the mounting groove.

[0012] According to the sealing head provided by the utility model, the end surface of the vibration block and the end surface of the packaging platform are located on the same plane.

[0013] According to the sealing head provided by the utility model, both ends of the vibration block are connected to the side walls of the installation groove through heat conduction members.

[0014] Another aspect of the utility model provides a soft-pack battery cell packaging device, including a body, a packaging structure and a vibration device, wherein the packaging structure is arranged on the body, the packaging structure includes two relatively arranged packaging parts, at least one of the packaging parts is a head as described in any of the above items, and the vibration device is connected to the head.

[0015] The sealing head provided by the utility model, by setting a vibration structure on the packaging table, applies a vibration effect in the horizontal direction (including the X direction and the Y direction) to the sealing head through an external vibration device (such as an ultrasonic device) during the heat sealing process of the battery cell, and can cause the gel particles with a certain fluidity to be displaced through the groove structure or the vibration block, deviating from the final sealing position, so as to achieve complete fusion of the polypropylene layer inside the aluminum-plastic film, avoid the generation of false sealing, and thus ensure the safety of subsequent battery cells. The soft-pack battery cell packaging equipment and sealing head provided by the utility model solve the defect that the equipment used in the final sealing process of the existing curing process is prone to false sealing of the battery cell.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of a head provided in one embodiment of the utility model.

[0019] Figure 2 It is an axonometric view of the head provided in the second embodiment of the utility model.

[0020] Figure 3 This is a front view of the head provided in the second embodiment of the utility model.

[0021] Reference numerals:

[0022] 10. Connecting seat; 110. Packaging platform; 111. Groove structure; 112. Mounting slot; 120. Vibrating block; 130. Elastic connecting piece; 140. Heat conducting piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model 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 embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Combine the following Figures 1 to 3 The utility model describes a soft-pack battery cell packaging device and a sealing head thereof.

[0029] Example 1

[0030] See also Figure 1 As shown, the sealing head provided in Example 1 of the utility model includes a connecting seat 10, and a packaging platform 110 is formed at the end of the connecting seat 10. A vibration structure is provided on the packaging platform 110; the vibration structure includes a groove structure 111 provided on the end face of the packaging platform 110, and the groove structure 111 is used to make the gel particles deviate from the final sealing position when vibration is applied to the packaging platform 110.

[0031] Specifically, in the process of heat-sealing the battery cell, the sealing head of this embodiment places the aluminum-plastic film to be sealed between two relatively arranged sealing heads, heats the sealing head by a heating device, and applies vibration in the horizontal direction (including the X direction and the Y direction) to the sealing head by an external vibration device (such as an ultrasonic device), so that the gel particles with a certain fluidity can be displaced and deviate from the final sealing position through the groove structure 111, so as to achieve complete fusion of the polypropylene layer inside the aluminum-plastic film, avoid the generation of false sealing, and ensure the safety of subsequent battery cell use. In addition, the groove structure 111 can exert force on the aluminum-plastic film during the heat-sealing process, drag the wrinkled part of the aluminum-plastic film to move, ensure the flatness of the aluminum-plastic film, and avoid poor packaging caused by the wrinkles of the aluminum-plastic film.

[0032] See also Figure 1 As shown, according to some embodiments of the utility model, the groove structure 111 includes a first groove group and a second groove group, the first groove group includes a plurality of first grooves, the plurality of first grooves are arranged at intervals on the end surface of the packaging platform 110 along the length direction of the packaging platform 110, the second groove group includes a plurality of second first grooves, the plurality of second grooves are arranged at intervals on the end surface of the packaging platform 110 along the length direction of the packaging platform 110, and the first grooves and the second grooves are arranged alternately. By setting the groove structure 111 in the form of the first groove group and the second groove group, the vibration effect generated by the external vibration device can be optimized, and the flatness of the aluminum-plastic film after heat sealing can be further ensured.

[0033] According to some embodiments of the present invention, the depths of the first groove and the second groove are both less than or equal to 1 mm, such as 1 mm, 0.8 mm, 0.6 mm or 0.5 mm, etc. By setting the depths of the first groove and the second groove within 1 mm, it is possible to prevent the appearance defects of the aluminum-plastic film surface caused by the grooves being too deep while ensuring the transmission of vibration energy.

[0034] Example 2

[0035] See also Figure 2 and Figure 3 As shown, see Figure 1 As shown, the head provided in Example 2 of the utility model includes a connecting seat 10, and a packaging platform 110 is formed at the end of the connecting seat 10. A vibration structure is provided on the packaging platform 110, and the vibration structure includes a vibration block 120. The vibration block 120 is elastically connected to the packaging platform 110.

[0036] Specifically, during the heat-sealing process of the battery cell, the sealing head of this embodiment places the aluminum-plastic film to be finally sealed between two relatively arranged sealing heads, heats the sealing head by a heating device, and applies horizontal (including X and Y directions) vibration to the sealing head by an external vibration device (such as an ultrasonic device). The vibration block 120 can transmit the horizontal mechanical vibration to the gel particles and cause them to displace and deviate from the final sealing position, thereby achieving complete fusion of the polypropylene layer inside the aluminum-plastic film and avoiding the generation of false sealing, thereby ensuring the safety of subsequent battery cell use.

[0037] According to some embodiments of the present invention, the vibration block 120 is elastically connected to the packaging platform 110 via an elastic connector 130. By elastically connecting the vibration block 120 to the packaging platform 110 via the elastic connector 130, the horizontal mechanical vibration can be better transmitted to the vibration block 120 via the elastic member.

[0038] According to some embodiments of the utility model, a plurality of elastic connectors 130 are provided between the vibration block 120 and the packaging platform 110, and the plurality of elastic connectors 130 are arranged at intervals along the length direction of the vibration block 120. By arranging a plurality of elastic connectors 130 at intervals between the vibration block 120 and the packaging platform 110, the vibration can be evenly transmitted to different positions of the vibration block 120, thereby further reducing the probability of false sealing of the battery cell and improving the packaging effect of the battery cell. Among them, the elastic connector 130 is a spring, a spring, an elastic pad or an elastic bracket. In this embodiment, the elastic connector 130 is preferably a spring.

[0039] See also Figure 2 As shown, according to some embodiments of the present invention, a mounting groove 112 is provided on the packaging platform 110, and the vibration block 120 is provided in the mounting groove 112. By providing the mounting groove 112 on the packaging platform 110, it is possible to provide an installation space for the vibration block 120, thereby preventing the vibration block 120 from occupying space. At the same time, the bottom of the mounting groove 112 can also provide a mounting surface for the elastic connector 130, so as to facilitate the installation and fixing of the elastic connector 130.

[0040] See also Figure 3 As shown, according to some embodiments of the present invention, the end surface of the vibration block 120 and the end surface of the packaging platform 110 are located on the same plane. By arranging the end surface of the vibration block 120 and the end surface of the packaging platform 110 on the same plane, it is possible to avoid the height difference between the vibration block 120 and the end surface of the packaging platform 110 affecting the appearance of the battery cell packaging, thereby reducing the defect rate of the appearance of the battery cell packaging.

[0041] See also Figure 2 and Figure 3As shown, according to some embodiments of the present invention, both ends of the vibration block 120 are connected to the side walls of the mounting groove 112 through the heat conduction member 140. By connecting both ends of the vibration block 120 to the side walls of the mounting groove 112 through the heat conduction member 140, heat can be easily transferred to the vibration block 120 to achieve heat sealing.

[0042] Example 3

[0043] Embodiment 3 of the present utility model provides a soft-pack battery cell packaging device, including a body, a packaging structure and a vibration device, wherein the packaging structure is arranged on the body, the packaging structure includes two relatively arranged packaging parts, at least one packaging part is a head as described in Embodiment 1 or Embodiment 2 above, and the vibration device is connected to the head.

[0044] The soft-pack battery cell packaging device provided by the present invention can also avoid false sealing of the battery cell because it adopts the sealing head of the above-mentioned embodiment 1 or embodiment 2.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A head, characterized in that: It comprises a connecting seat, an end of which is formed with a packaging platform, and a vibration structure is provided on the packaging platform; The vibration structure includes a groove structure provided on the end surface of the packaging platform, and the groove structure is used to make the gel particles deviate from the final sealing position when the packaging platform is vibrated; Alternatively, the vibration structure includes a vibration block, and the vibration block is elastically connected to the packaging platform.

2. The end cap according to claim 1, characterized in that: The groove structure includes a first groove group and a second groove group, the first groove group includes a plurality of first grooves, and the plurality of first grooves are arranged at intervals on the end surface of the packaging platform along the length direction of the packaging platform, the second groove group includes a plurality of second grooves, and the plurality of second grooves are arranged at intervals on the end surface of the packaging platform along the length direction of the packaging platform, and the first grooves and the second grooves are arranged alternately.

3. The end cap according to claim 2, characterized in that: The depths of the first groove and the second groove are both less than or equal to 1 mm.

4. The end cap according to claim 1, characterized in that: The vibration block is elastically connected to the packaging platform through an elastic connecting piece.

5. The end cap according to claim 4, characterized in that: A plurality of the elastic connecting members are disposed between the vibration block and the packaging platform, and the plurality of the elastic connecting members are spaced apart along the length direction of the vibration block.

6. The end cap according to claim 4 or 5, characterized in that: The elastic connecting member is a spring, a spring sheet, an elastic pad or an elastic bracket.

7. The sealing head according to claim 1, characterized in that: The packaging platform is provided with a mounting groove, and the vibration block is arranged in the mounting groove.

8. The sealing head according to claim 7, characterized in that: The end surface of the vibration block and the end surface of the packaging platform are located on the same plane.

9. The sealing head according to claim 7 or 8, characterized in that: Two ends of the vibration block are connected to the side walls of the mounting groove through a heat conduction member.

10. A soft-pack battery cell packaging device, characterized in that: include: body; A packaging structure, the packaging structure is arranged on the fuselage, the packaging structure comprises two packaging parts arranged opposite to each other, at least one of the packaging parts is a sealing head according to any one of claims 1 to 9; A vibration device is connected to the head.

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