Sealing head for secondary sealing and pre-sealing of soft package battery and packaging equipment

Abstract

The utility model belongs to the technical field of packaging grinding tool structures, and particularly relates to an end socket for secondary sealing and pre-sealing of a soft package battery, the end socket comprises a first end socket and a second end socket which are in mirror symmetry, a pre-sealing area is arranged at the position, corresponding to a secondary sealing area of the battery to be packaged, of the end socket, and the pre-sealing area is provided with a first protruding part and a second protruding part. The number of the first protruding parts is two, the two first protruding parts are arranged corresponding to the corners of a battery to be packaged respectively, and the second protruding part is arranged between the two first protruding parts. According to the utility model, the liquid leakage phenomenon of secondary packaging is improved by arranging the second protruding part, and meanwhile, the corresponding packaged battery cell can be better fixed, so that the battery cell is prevented from shifting during formation. In addition, the utility model further discloses packaging equipment comprising the end socket for pre-sealing.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging mold structures, and in particular relates to a sealing head and packaging equipment for secondary sealing of soft-pack batteries. Background Art

[0002] Nowadays, with the development of modern society and the enhancement of people's environmental awareness, more and more devices choose lithium-ion batteries as power sources, such as mobile phones, laptops, power tools and electric vehicles, which provides a broad space for the application and development of lithium-ion batteries.

[0003] Among them, the cell is an important part of the battery, and the packaging of the bare cell needs to go through two processes: the first sealing and the second sealing. The existing conventional bare cell needs to be taped to ensure the integrity of the bare cell structure. However, the immersion of the electrolyte after the injection makes the adhesive effect of the tape poor. As a result, during the second sealing degassing, the semi-finished battery will suck the tail tape out to the second sealing edge under negative pressure. During the second sealing packaging, it is easy to cause the tape to be pressed at the seal, resulting in packaging leakage, which in turn reduces the battery yield and safety performance. For this reason, it is urgent to propose a new technical solution to solve the above problems. Utility Model Content

[0004] One of the purposes of the utility model is to provide a double-sealed pre-sealing sealing head for soft-pack batteries in response to the deficiencies of the prior art, which can improve the leakage of the double seal by pre-sealing the battery to be packaged by arranging a second protrusion in the middle of the pre-sealing area.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealing head for double sealing of a soft-pack battery, the sealing head comprising a first sealing head and a second sealing head which are mirror-symmetrical, the second sealing area of ​​the sealing head corresponding to the battery to be packaged is set as a pre-sealing area, the pre-sealing area is provided with a first protrusion and a second protrusion, two first protrusions are provided, the two first protrusions are respectively corresponding to the corner positions of the battery to be packaged, and the second protrusion is arranged in the middle of the two first protrusions.

[0007] In practical applications, the pre-sealing head of the utility model is used in the pre-sealing after sealing and before formation in the battery packaging project to improve the secondary packaging effect of the battery, increase the battery packaging yield and the safety performance of the battery.

[0008] In the utility model, the first protrusions provided in the pre-sealing area are respectively provided at the two ends of the pre-sealing area, and correspond to the corners of the batteries to be packaged. Pre-sealing before secondary packaging is performed here, which can improve the problems of glue overflow and sharp corners at the corners, thereby avoiding the occurrence of leakage due to damage to the folded edges; the second protrusions provided in the pre-sealing area are provided in the middle position of the pre-sealing area. Pre-sealing before secondary packaging is performed here, which can effectively prevent the tape from being adsorbed to the second sealing position when the secondary packaging is evacuated, thereby improving the phenomenon that the second sealing presses the tape out and causes leakage; at the same time, the first protrusion and the second protrusion are provided on the same straight line, and pre-sealing can be performed at the same time, thereby improving efficiency and saving time; and the provision of the first protrusion and the second protrusion can also prevent the movement of the battery cell during formation, thereby ensuring the formation effect.

[0009] As an improvement of the double-sealed pre-sealed seal for the soft-pack battery described in the utility model, in the length direction of the seal, the pre-sealed area has a first end, the distance between the second protrusion and the first end is D1, the length of the pre-sealed area is D2, and D1 and D2 satisfy the relationship: D1 / D2=a, 0.2≤a≤0.8.

[0010] As an improvement of the double-sealed pre-sealed sealing head for soft-pack batteries described in the utility model, in the length direction, the pre-sealed area has a second end opposite to the first end, the distance between the second protrusion and the second end is D3, the length of the pre-sealed area is D2, and D3 and D2 satisfy the relationship: D3 / D2=b, 0.2≤b≤0.8.

[0011] As an improvement of the double-sealed pre-sealed sealing head for soft-pack batteries described in the utility model, a plurality of second protrusions are provided in the length direction, the distance between the plurality of second protrusions is D4, the length of the pre-sealed area is D2, and D4 and D2 satisfy the relationship: D4 / D2=c, 0.2≤c≤0.8.

[0012] As an improvement of the second pre-sealing sealing head for soft-pack batteries described in the utility model, in the length direction, the length of the second protrusion is set to 2mm-30mm.

[0013] As an improvement of the second pre-sealing seal for soft-pack batteries described in the utility model, the width of the second protrusion is set to 2mm-6mm in the width direction of the seal.

[0014] As an improvement of the second pre-sealing seal for soft-pack batteries described in the utility model, the first protrusion is provided with a chamfer structure, and the chamfer radius is set to 0.1mm-3mm.

[0015] As an improvement of the second pre-sealing sealing head for soft-pack batteries described in the utility model, in the length direction, the length of the first protrusion is set to 3mm-7mm.

[0016] As an improvement of the double-sealed pre-sealing head for soft-pack batteries described in the utility model, in the width direction, the width of the first protrusion is set to 2mm-6mm. The setting of the above parameters ensures the position and size of the first protrusion and the second protrusion, and can ensure the smooth progress of pre-sealing.

[0017] The second object of the utility model is to provide a packaging device, including the second pre-sealing head for the soft-pack battery as described above.

[0018] The beneficial effect of the utility model is that the second sealing pre-sealing head of the soft-pack battery of the utility model includes a first sealing head and a second sealing head which are mirror-symmetrical. The second sealing area of ​​the head corresponding to the battery to be packaged is set as a pre-sealing area. The pre-sealing area is provided with a first protrusion and a second protrusion. There are two first protrusions, and the two first protrusions correspond to the corners of the battery to be packaged, respectively. The second protrusion is set in the middle of the two first protrusions. The sealing head of the utility model improves the corner glue overflow and sharp corner problems during the secondary pre-sealing by setting the first protrusion; the sealing head improves the phenomenon of leakage caused by the tape being pressed out by the second seal by setting the second protrusion, thereby improving the battery packaging yield and improving the safety performance of the packaged battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the first head in the utility model.

[0021] Figure 2 It is a practical application schematic diagram of the utility model.

[0022] The reference numerals are described as follows:

[0023] 1- first protrusion;

[0024] 2- second protrusion;

[0025] 31-first end; 32-second end;

[0026] X-length direction; Y-width direction;

[0027] 100-first sealing head; 200-second sealing head; 300-batteries to be packaged. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific implementation methods and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0030] Reference to "embodiment" in this application means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0031] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0032] The term "plurality" used in the present application refers to two or more (including two).

[0033] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery safety must also be considered.

[0034] Due to the particularity of the soft-pack battery structure, the packaging effect is one of the important factors affecting the safety of the soft-pack battery. The existing bare cell packaging is divided into primary packaging and secondary packaging, and the existing conventional bare cell tailing requires tape to ensure that the bare cell does not fall apart. However, the immersion of the electrolyte after the injection makes the adhesive effect of the tape poor, so that the tailing tape is sucked out to the second sealing edge under the negative pressure state during the secondary sealing degassing. During the secondary sealing, it is easy to cause the tape to be pressed out of the seal, resulting in packaging leakage and reducing the safety of the battery. In view of this, this embodiment provides a head for pre-sealing the semi-finished battery before the secondary packaging of the battery, and a second protrusion is provided in the middle of the pre-sealing area, which can prevent the above situation from occurring, thereby improving the safety of the battery.

[0035] The following is combined with Figures 1-2 The utility model is further described in detail with specific implementation modes, but is not intended to limit the utility model.

[0036] A sealing head for double sealing of a soft-pack battery comprises a first sealing head 100 and a second sealing head 200 which are mirror-symmetrical. The second sealing area of ​​the sealing head corresponding to the packaged battery 300 is set as a pre-sealing area. The pre-sealing area is provided with a first protrusion 1 and a second protrusion 2. Two first protrusions 1 are provided, and the two first protrusions 1 are respectively arranged corresponding to the corner positions of the packaged battery 300. The second protrusion 2 is arranged in the middle of the two first protrusions 1.

[0037] Preferably, the first protrusion 1 is provided with a chamfer structure, and the chamfer radius is set to 0.1mm-3mm. In the length direction X, the length of the first protrusion 1 is set to 3mm-7mm, and in the width direction Y, the width of the first protrusion 1 is set to 2mm-6mm. In this embodiment, the two first protrusions 1 are respectively arranged at the two ends of the pre-sealing area, and correspond to the corners of the packaged battery 300, where the pre-sealing before the secondary packaging is performed. The chamfer setting can improve the corner glue overflow and sharp corner problems, thereby avoiding the occurrence of leakage caused by the damage of the folded edge.

[0038] Preferably, in the length direction X of the seal, the pre-sealed area has a first end 31 and a second end 32 opposite to the first end 31, the first end 31 and the second end 32 respectively correspond to the top and the bottom of the second sealing area of ​​the battery to be packaged, the distance between the second protrusion 2 and the first end 31 is D1, the length of the pre-sealed area is D2, and D1 and D2 satisfy the relationship: D1 / D2=a, 0.2≤a≤0.8; in the length direction X, the distance between the second protrusion 2 and the second end 32 is D3, the length of the pre-sealed area is D2, and D3 and D2 satisfy the relationship: D3 / D2=b, 0.2≤b≤0.8; in the width direction Y of the seal, the width of the second protrusion 2 is set to 2mm-6mm, and in the length direction X, the length of the second protrusion 2 is set to 2mm-30mm. In this embodiment, the second protrusion 2 provided in the pre-sealing area is provided in the middle position of the pre-sealing area. Pre-sealing before secondary packaging is performed here, which can effectively prevent the tape from being adsorbed to the secondary sealing position when the secondary packaging is evacuated, thereby improving the phenomenon that the secondary seal presses the tape out and causes leakage.

[0039] In this embodiment, one second protrusion 2 is provided in the length direction X. It can be understood that in some other embodiments, multiple second protrusions 2 can be provided, and the distance between the multiple second protrusions 2 is D4. The length of the pre-sealing area is D2. The D4 and the D2 satisfy the relationship: D4 / D2=c, 0.2≤c≤0.8, which can achieve the technical effect of preventing the tape from being adsorbed to the secondary sealing position while the pre-sealing effect does not affect the secondary packaging function and specific operation.

[0040] It can be understood that the setting of the size or structural distance between the first protrusion 1 and the second protrusion 2 in this embodiment can further ensure the improvement effect on the secondary packaging. The specific size needs to be set according to actual conditions and specific needs, and no special regulations are made.

[0041] In this embodiment, the first protrusion 1 and the second protrusion 2 are arranged on the same straight line, and pre-sealing can be performed simultaneously, thereby improving efficiency and saving time; and the arrangement of the first protrusion 1 and the second protrusion 2 can also prevent the movement of the battery cell during formation, thereby ensuring the formation effect.

[0042] Packaging equipment

[0043] A packaging device includes the above-mentioned soft-pack battery secondary pre-sealing head. After being installed with a corresponding device, the head is used to improve the safety of the battery and enhance the battery formation effect after the liquid injection and sealing of the primary packaging and before the battery is formed.

[0044] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A sealing head for secondary sealing of a soft-pack battery, the sealing head comprising a first sealing head (100) and a second sealing head (200) which are mirror-symmetrical, and the secondary sealing area of ​​the sealing head corresponding to the battery to be packaged is set as a pre-sealing area, characterized in that: The pre-sealing area is provided with a first protruding portion (1) and a second protruding portion (2), two first protruding portions (1) are provided, the two first protruding portions (1) are respectively provided corresponding to the corner positions of the battery to be packaged, and the second protruding portion (2) is provided in the middle of the two first protruding portions (1).

2. The second pre-sealing seal for soft-pack batteries according to claim 1, characterized in that: In the length direction (X) of the seal head, the pre-sealed area has a first end (31), the distance between the second protrusion (2) and the first end (31) is D1, the length of the pre-sealed area is D2, and D1 and D2 satisfy the relationship: D1 / D2=a, 0.2≤a≤0.

8.

3. The second pre-sealing seal for soft-pack batteries according to claim 2, characterized in that: In the length direction (X), the pre-sealed area has a second end (32) opposite to the first end (31), the distance between the second protrusion (2) and the second end (32) is D3, and D3 and D2 satisfy the relationship: D3 / D2=b, 0.2≤b≤0.

8.

4. The second pre-sealing seal for soft-pack batteries according to claim 2, characterized in that: In the length direction (X), a plurality of second protrusions (2) are provided, the distance between the plurality of second protrusions (2) is D4, and the length of the pre-sealed area is D 2， The D4 and the D2 satisfy the relationship: D4 / D2=c, 0.2≤c≤0.

8.

5. The second pre-sealing head for soft-pack batteries according to any one of claims 2 to 4, characterized in that: In the length direction (X), the length of the second protrusion (2) is set to 2mm-30mm.

6. The second pre-sealing seal for soft-pack batteries according to claim 1, characterized in that: In the width direction (Y) of the head, the width of the second protrusion (2) is set to 2mm-6mm.

7. The second pre-sealing seal for soft-pack batteries according to claim 1, characterized in that: The first protruding portion (1) is provided with a chamfered structure, and the chamfer radius of the chamfered structure is set to 0.1 mm-3 mm.

8. The second pre-sealing head for soft-pack batteries according to any one of claims 2 to 4, characterized in that: In the length direction (X), the length of the first protrusion (1) is set to 3mm-7mm.

9. The second pre-sealing seal for soft-pack batteries according to claim 6, characterized in that: In the width direction (Y), the width of the first protrusion (1) is set to 2mm-6mm.

10. A packaging device, characterized in that: It comprises a second pre-sealing head for a soft-pack battery as described in any one of claims 1 to 9.

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