Packaging tool

Abstract

The utility model belongs to the technical field of batteries, and discloses a packaging tool. The packaging tool comprises a main die body and a matched die body. A first sealing part is arranged on the main mold body, and the first sealing part comprises a first battery cell area sealing convex edge, a first transition area sealing convex edge and a first air bag area sealing convex edge which are arranged in sequence; an anti-wrinkle groove is formed in the outer side of the first transition area sealing protruding edge, and a guide flow channel is formed in the edge of the outer side of the first transition area sealing protruding edge. And a second sealing part is arranged on the matching die body and is used for being matched with the first sealing part to clamp the to-be-sealed side edge of the aluminum plastic film. The tool can reduce wrinkles generated by the aluminum plastic film under the conditions of high temperature and high pressure, so that the problem of poor packaging of the aluminum plastic film is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, in particular to a packaging tool. Background Art

[0002] Soft pack battery cell packaging refers to placing the bare battery cell into a punched aluminum-plastic film box, and using specific packaging equipment and fixtures to heat-seal the aluminum-plastic film box to ensure that the bare battery cell is in a sealed aluminum-plastic film box to avoid direct contact with the outside air to ensure the good performance of the battery cell. The aluminum-plastic film is mainly composed of an outer nylon layer, an intermediate aluminum foil layer, and an inner heat-sealing layer. The heat-sealing process generally includes top sealing, side sealing, one sealing, and two sealing. Top sealing refers to the packaging of the end of the battery cell with the pole ear; side sealing refers to the packaging of the side adjacent to the end of the battery cell with the pole ear. Side sealing makes the aluminum-plastic film form an aluminum-plastic film bag with an opening for liquid injection; one sealing makes the aluminum-plastic film bag form an internal environment with an air bag and closed; the second sealing is used to seal the battery cell to remove the air bag.

[0003] After the aluminum-plastic film is sealed on the top, the side seal and the second seal will form an overlapping area with the top seal. Since the packaging process requires a certain temperature and pressure for the packaging fixture, and due to the heat shrinkage of the aluminum-plastic film, under high temperature and high pressure conditions, glue overflow and other undesirable phenomena will occur in the overlapping area. When using existing fixtures to package batteries, it is easy to have wrinkles and other undesirable packaging phenomena on the sealing ridges, which will lead to hidden dangers such as battery corrosion and leakage.

[0004] Therefore, it is urgent to propose a packaging tool to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a packaging tool, which can reduce the wrinkles of the aluminum-plastic film under high temperature and high pressure conditions, thereby effectively avoiding the occurrence of battery corrosion, leakage and other problems caused by poor packaging of the aluminum-plastic film.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A packaging tool is used to package the side edge of an aluminum-plastic film to be packaged, wherein the aluminum-plastic film includes a battery core area, a transition area and an air bag area arranged in sequence, and the packaging tool includes:

[0008] A main mold body, wherein a first sealing portion is arranged on the main mold body, wherein the first sealing portion comprises a first cell area sealing ridge, a first transition area sealing ridge and a first air bag area sealing ridge which are arranged in sequence; an anti-wrinkle groove is arranged on the outer side of the first transition area sealing ridge, and a guide flow channel is arranged on the outer edge of the first transition area sealing ridge, wherein the guide flow channel is used to guide the pole ear glue to the anti-wrinkle groove;

[0009] A matching mold body is provided with a second sealing portion for cooperating with the first sealing portion to clamp the side edge of the aluminum-plastic film to be sealed.

[0010] Optionally, the guide flow channel is formed by chamfering or rounding the edges of the sealing ridges in the first air bag area.

[0011] Optionally, the anti-wrinkle groove has a trapezoidal cross section.

[0012] Optionally, the cross-section of the sealing ridge of the first transition zone is U-shaped.

[0013] Optionally, a first pole tab sealing groove is provided on the sealing ridge of the first battery cell area, and the first pole tab sealing groove is used for accommodating the pole tab.

[0014] Optionally, at least one of the two ends of the main mold body in the length direction is provided with a first glue overflow groove.

[0015] Optionally, the second sealing portion includes a second battery cell area sealing ridge, a second transition area sealing ridge and a second air bag area sealing ridge which are arranged in sequence, the second battery cell area sealing ridge, the second transition area sealing ridge and the second air bag area sealing ridge are respectively arranged with the first battery cell area sealing ridge, and the first transition area sealing ridge and the first air bag area sealing ridge are arranged in one-to-one correspondence.

[0016] Optionally, a second pole tab sealing groove is provided on the sealing ridge of the second battery cell area, and the second pole tab sealing groove is used for accommodating the pole tab.

[0017] Optionally, at least one of the two ends of the mating mold body in the length direction is provided with a second glue overflow groove.

[0018] Optionally, a plurality of mounting holes are provided on the main mold body and the matching mold body, and the mounting holes are used to connect the main mold body and the matching mold body.

[0019] Beneficial effects:

[0020] The packaging tool provided by the utility model clamps the side of the aluminum-plastic film to be packaged by the first sealing part and the second sealing part, and heat-seals the aluminum-plastic film. By setting an anti-wrinkle groove on the outer side of the sealing convex ridge in the first transition zone, and setting a guide flow channel on the outer edge of the sealing convex ridge in the first transition zone, the overflowed ear glue can flow into the anti-wrinkle groove through the guide flow channel, and at the same time, it can reduce the wrinkles caused by the extension and deformation of the transition zone of the aluminum-plastic film under high temperature and high pressure, thereby effectively avoiding the problem of poor packaging of the aluminum-plastic film, and further reducing the safety hazards of battery corrosion, leakage, etc. caused by poor packaging of the aluminum-plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the aluminum-plastic film provided in the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the assembly structure of a bare battery cell and an aluminum-plastic film provided in the first embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the assembly structure of the packaging tooling and the battery cell provided in the first embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the main mold provided in the first embodiment of the utility model. Figure 1 ;

[0026] Figure 5 This is a schematic diagram of the structure of the main mold provided in the first embodiment of the utility model. Figure 2 ;

[0027] Figure 6 This is a schematic diagram of the structure of the main mold provided in the first embodiment of the utility model. Figure 3 ;

[0028] Figure 7 The utility model embodiment 1 provides Figure 6 A partial enlarged view of the middle A;

[0029] Figure 8 This is a schematic diagram of the bare battery cell and the main mold assembly structure provided in the first embodiment of the utility model;

[0030] Fig. 9 It is a structural schematic diagram of the matching mold provided in the first embodiment of the utility model;

[0031] Fig.10 It is a schematic structural diagram of a packaged battery cell provided in the first embodiment of the present utility model.

[0032] In the figure:

[0033] 10. Aluminum-plastic film; 11. Cell area; 12. Transition area; 13. Air bag area; 20. Bare cell; 21. Tab; 22. Tab glue;

[0034] 100, main mold body; 110, first sealing part; 111, first battery cell area sealing ridge; 1110, first pole ear sealing groove; 112, first transition area sealing ridge; 113, first air bag area sealing ridge; 120, anti-wrinkle groove; 121, guide flow channel; 130, first glue overflow groove;

[0035] 200, matching mold body; 210, second sealing part; 211, second battery cell area sealing ridge; 2110, second pole ear sealing groove; 212, second transition area sealing ridge; 213, second air bag area sealing ridge; 220, second glue overflow groove;

[0036] 300. Mounting hole. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing 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 a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] Embodiment 1

[0042] See also Figure 1 and Figure 2 The aluminum-plastic film 10 includes a battery cell area 11, a transition area 12 and an air bag area 13 arranged in sequence, and the battery cell area 11 is used to place a bare battery cell 20. Both ends of the bare battery cell 20 are connected with pole ears 21, and the pole ears 21 extend out of the side of the aluminum-plastic film 10. The pole ears 21 are provided with pole ear glue 22, and the pole ear glue 22 is located on the side plate of the aluminum-plastic film 10, which can bond the pole ears 21 and the aluminum-plastic film 10. During the packaging process of the aluminum-plastic film 10, the side to be packaged in the transition area 12 is close to the pole ear glue 13, and glue overflow often occurs, and at the same time, extension and deformation occur due to heat. This embodiment provides a packaging tooling that can effectively solve the above problems.

[0043] See also Figures 3 to 7 The present embodiment provides a packaging tool for packaging the side to be packaged of the aluminum-plastic film 10, and the packaging tool comprises a main mold 100 and a matching mold 200. The main mold 100 is provided with a first sealing part 110, and the first sealing part 110 comprises a first cell area sealing ridge 111, a first transition area sealing ridge 112 and a first air bag area sealing ridge 113 arranged in sequence; an anti-wrinkle groove 120 is arranged on the outer side (the side away from the aluminum-plastic film 10) of the first transition area sealing ridge 112, and a guide channel 121 is arranged on the outer side (the side away from the aluminum-plastic film 10) of the first transition area sealing ridge 112. The guide channel 121 is used to guide the tab glue 22 to the anti-wrinkle groove 120. The matching mold 200 is provided with a second sealing part 210, which is used to cooperate with the first sealing part 110 to clamp the side to be sealed of the aluminum-plastic film 10.

[0044] The above-mentioned packaging tool clamps the side to be packaged of the aluminum-plastic film 10 through the first sealing part 110 and the second sealing part 210 to heat-seal the aluminum-plastic film 10. By setting the anti-wrinkle groove 120 on the outside of the sealing ridge 112 in the first transition zone, and setting the guide flow channel 121 on the outer edge of the sealing ridge 112 in the first transition zone, the overflowed ear glue 12 can flow into the anti-wrinkle groove 120 through the guide flow channel 121, and at the same time, it can reduce the wrinkles caused by the extension and deformation of the transition zone 12 of the aluminum-plastic film 10 under high temperature and high pressure, thereby effectively avoiding the problem of poor packaging of the aluminum-plastic film 10, and further reducing the safety hazards of battery corrosion, leakage, etc. caused by poor packaging of the aluminum-plastic film 10.

[0045] Further, in the present embodiment, the main mold body 100 and the matching mold body 200 are both roughly rectangular parallelepiped structures. The first sealing portion 110 is arranged along the length direction of the main mold body 100, and the second sealing portion 210 is arranged along the length direction of the matching mold body 200, and the positions of the first sealing portion 110 and the second sealing portion 210 are relative, so that the side of the aluminum-plastic film 10 can be aligned and clamped. When the main mold body 100 and the matching mold body 200 are molded together, the side to be packaged of the aluminum-plastic film 10 is clamped between the first sealing portion 110 and the second sealing portion 210, and the battery cell area 11, the transition area 12 and the air bag area 13 correspond to the first battery cell area sealing ridge 111, the first transition area sealing ridge 112 and the first air bag area sealing ridge 113 respectively.

[0046] Optionally, the guide channel 121 is formed by chamfering or rounding the edge of the sealing ridge 111 in the first air bag area.

[0047] Optionally, the width of the guide channel 121 is 0.5 mm to 0.8 mm, illustratively, it can be 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm, etc. It can be understood that the guide channel 121 is arranged on the side away from the aluminum-plastic film 10, which can help guide the tab glue 22 to the outside of the aluminum-plastic film 10.

[0048] Furthermore, the cross section of the anti-wrinkle groove 120 is a trapezoid. Accordingly, the first transition zone sealing ridge 112 is a broken line type.

[0049] Optionally, the length of the upper base of the trapezoid is 5mm to 20mm, the length of the lower base is 15mm to 40mm, and the height is 3mm to 15mm. Exemplarily, the length of the upper base of the trapezoid is 5mm, 10mm, 15mm or 20mm, etc.; the length of the lower base is 15mm, 20mm, 25mm, 30mm, 35mm or 40mm, etc.; the height is 3mm, 7mm, 10mm, 12mm or 15mm, etc. In other embodiments, the shape of the anti-wrinkle groove 120 can also be square, circular or semicircular, etc. Optionally, the depth of the anti-wrinkle groove 120 is 1mm to 3mm, and can be 1mm, 2mm or 3mm, etc., for example.

[0050] Optionally, the cross section of the sealing ridge 112 in the first transition zone is U-shaped, and correspondingly, the cross section of the anti-wrinkle groove 120 is semicircular.

[0051] Further, see Figures 4 to 8 A first tab sealing groove 1110 is provided on the first cell area sealing ridge 111 , and the first tab sealing groove 1110 is used for placing the tab 21 .

[0052] It can be understood that the tab 21 is placed at the first tab sealing groove 1110. The depth of the first tab sealing groove 1110 is set according to the thickness of the tab 21, the tab glue 22 and the aluminum-plastic film 10, and the width of the first tab sealing groove 1110 is set according to the width of the tab 21. The setting of the first tab sealing groove 1110 can prevent the tab 21 from being damaged due to excessive pressure.

[0053] Furthermore, at least one of the two ends of the main mold body 100 in the length direction is provided with a first glue overflow groove 130 .

[0054] For example, Figures 3 to 6 As shown, a first glue overflow groove 130 is provided on one side close to the first air bag area sealing ridge 111. In other embodiments, the first glue overflow groove 130 may also be provided on one side of the first side edge area sealing ridge 113. The first glue overflow groove 130 is provided at the end of the side edge to be packaged, and is used to accommodate the glue overflow at the end of the side edge to be packaged, so as to prevent the glue overflow from adhering to the main mold 100, which causes inconvenience to the cleaning of the main mold 100.

[0055] Further, see Fig. 9 The second sealing portion 210 includes a second battery cell area sealing ridge 211, a second transition area sealing ridge 212 and a second air bag area sealing ridge 213 which are arranged in sequence. The second battery cell area sealing ridge 211, the second transition area sealing ridge 212 and the second air bag area sealing ridge 213 are respectively arranged in one-to-one correspondence with the first battery cell area sealing ridge 111, the first transition area sealing ridge 112 and the first air bag area sealing ridge 113.

[0056] Furthermore, at least one of the two ends of the mating mold body 200 in the length direction is provided with a second glue overflow groove 214 .

[0057] It can be understood that the second overflow glue groove 214 on the matching mold body 200 and the first overflow glue groove 130 on the main mold body 100 are provided correspondingly. The second overflow glue groove 214 can be provided at both ends of the matching mold body 200 according to specific use needs, or the second overflow glue groove 214 can be provided at only one end. The second overflow glue groove 214 is provided at the end of the side to be packaged, and is used to accommodate the overflow glue at the end of the side to be packaged, so as to prevent the overflow glue from adhering to the matching mold body 200, which brings inconvenience to the cleaning of the matching mold body 200.

[0058] Furthermore, a second tab sealing groove 2110 is provided on the sealing ridge of the second battery cell area 11 , and the second tab sealing groove 2110 is used for placing the tab 21 .

[0059] It can be understood that the second tab sealing groove 2110 and the first tab sealing groove 1110 are arranged opposite to each other, and the arrangement of the second tab sealing groove 2110 can prevent the tab 21 from being damaged due to excessive pressure.

[0060] Furthermore, a plurality of mounting holes 300 are provided on the main mold body 100 and the matching mold body 200 , and the mounting holes 300 are used to connect the main mold body 100 and the matching mold body 200 .

[0061] Optionally, a fixing pin can be used to pass through the mounting hole 300 to lock and fix the main mold 100 and the matching mold 200. The fixing pin can be a common connecting component such as a bolt. Optionally, the portion where the main mold 100 and the matching mold 200 are connected is set to a step shape, which can play a positioning role and prevent the main mold 100 and the matching mold 200 from shifting during the connection process. When closing the mold, the main mold 100 and the matching mold 200 are plugged in. Optionally, a plurality of mounting holes 300 are provided, and the plurality of mounting holes 300 are arranged in a matrix. The specific number of mounting holes 300 is set according to the use needs, which can effectively prevent the main mold 100 and the matching mold 200 from being misaligned during the working process.

[0062] The packaging tooling provided in this embodiment is used as follows:

[0063] See also Figure 1 , Figure 2 and Figure 8 , put the bare battery cell 20 into the punched aluminum-plastic film 10, and then place it on the main mold 100. When placed, the tab 21 is located in the first tab sealing groove 1110, the battery cell area 11 is located on the first air bag area sealing ridge 111, and correspondingly, the transition area 12 is located on the first transition area sealing ridge 112, and the air bag area 13 is located on the first air bag area sealing ridge 113. Figure 3After the placement is completed, the matching mold 200 and the main mold 100 are closed and a certain temperature and pressure are applied to perform heat sealing. After the heat sealing is completed, the battery cell is taken out and the packaged battery cell is as follows Fig.10 shown.

[0064] Embodiment 2

[0065] The similarities between this embodiment and the first embodiment are not described again, and only the differences between this embodiment and the first embodiment are described below:

[0066] In the first embodiment, the side wall of the first tab sealing groove 1110 is arranged perpendicular to the groove bottom. In this embodiment, an obtuse angle is formed between the side wall and the groove bottom of the first tab sealing groove 1110, thereby effectively increasing the heat sealing effect of the aluminum-plastic film 10 on both sides of the tab 21. Correspondingly, an obtuse angle can also be formed between the side wall and the groove bottom of the second tab sealing groove 213.

[0067] Furthermore, in the first embodiment, the bottom of the first tab sealing groove 1110 is a plane, while in the present embodiment, the bottom of the first tab sealing groove 1110 is a curved surface, thereby preventing the aluminum-plastic film 10 from wrinkling and effectively enhancing the heat sealing effect at the location of the tab glue 22 .

[0068] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A packaging tool, used for packaging a side edge of an aluminum-plastic film (10) to be packaged, wherein the side edge of the aluminum-plastic film (10) to be packaged comprises a battery cell area (11), a transition area (12) and an air bag area (13) arranged in sequence, characterized in that: The packaging tool comprises: A main mold body (100), wherein a first sealing portion (110) is arranged on the main mold body (100), and the first sealing portion (110) comprises a first battery cell area sealing ridge (111), a first transition area sealing ridge (112), and a first air bag area sealing ridge (113) which are arranged in sequence; an anti-wrinkle groove (120) is arranged on the outer side of the first transition area sealing ridge (112), and a guide flow channel (121) is arranged on the outer edge of the first transition area sealing ridge (112), and the guide flow channel (121) is used to guide the pole ear glue (22) to the anti-wrinkle groove (120); A matching mold body (200) is provided with a second sealing portion (210) for cooperating with the first sealing portion (110) to clamp the side edge of the aluminum-plastic film (10) to be packaged.

2. The packaging tool according to claim 1, characterized in that: The guide flow channel (121) is formed by chamfering or rounding the edge of the sealing ridge (113) in the first air bag area.

3. The packaging tool according to claim 1, characterized in that: The anti-wrinkle groove (120) has a trapezoidal cross section.

4. The packaging tool according to claim 1, characterized in that: The cross section of the first transition zone sealing ridge (112) is U-shaped.

5. The packaging tool according to claim 1, characterized in that: A first pole lug sealing groove (1110) is provided on the first cell area sealing ridge (111), and the first pole lug sealing groove (1110) is used to accommodate the pole lug (21).

6. The packaging tool according to claim 1, characterized in that: At least one of the two ends of the main mold body (100) in the length direction is provided with a first glue overflow groove (130).

7. The packaging tool according to claim 1, characterized in that: The second sealing portion (210) comprises a second battery cell area sealing ridge (211), a second transition area sealing ridge (212) and a second air bag area sealing ridge (213) which are arranged in sequence; the second battery cell area sealing ridge (211), the second transition area sealing ridge (212) and the second air bag area sealing ridge (213) are arranged in one-to-one correspondence with the first battery cell area sealing ridge (111), the first transition area sealing ridge (112) and the first air bag area sealing ridge (113), respectively.

8. The packaging tool according to claim 7, characterized in that: A second pole lug sealing groove (2110) is provided on the sealing ridge of the second battery cell area (11), and the second pole lug sealing groove (2110) is used for accommodating the pole lug (21).

9. The packaging tool according to claim 1, characterized in that: At least one of the two ends of the matching mold body (200) in the length direction is provided with a second glue overflow groove (220).

10. The packaging tool according to claim 1, characterized in that: A plurality of mounting holes (300) are provided on both the main mold body (100) and the matching mold body (200), and the mounting holes (300) are used to connect the main mold body (100) and the matching mold body (200).

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