Packaging mold and packaging equipment

Abstract

The utility model provides a packaging mold and packaging equipment, the packaging mold comprises a first sealing head and a second sealing head, and the first sealing head is provided with a first avoiding groove and two first grooves; the second sealing head is provided with a second avoiding groove and two second grooves; the packaging mold comprises a mold closing state, in the mold closing state, the first sealing head abuts against the second sealing head in the first direction, the positions of the first receding groove and the second receding groove correspond to each other to form a false tab receding area, and the positions of the first grooves and the positions of the second grooves correspond to each other one by one to form a first containing area and a second containing area. The packaging equipment comprises a driving device and the packaging mold, the packaging mold is connected with the driving device, and the driving device is used for driving the first sealing head and the second sealing head to get close to each other or get away from each other in the first direction. According to the packaging mold and the packaging equipment, packaging of false tabs can be avoided, and the sealing performance and the uniformity of battery packaging can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a packaging mold and packaging equipment. Background Art

[0002] During the charge and discharge cycle, the battery will produce lithium deposition, which will affect the battery's service life and performance. To improve the lithium deposition phenomenon of the battery, fake tabs are usually welded at the edges of the positive and / or negative electrode sheets. The fake tabs can optimize the current transmission path and improve the battery's lithium deposition phenomenon. The problem is that the fake tabs have a certain thickness, and the thickness of the aluminum-plastic film is uneven where the fake tabs are covered and where they are not covered. During the packaging operation, the area where the fake tabs are located is easily over-extruded by the head, resulting in defects such as abnormal packaging thickness at the edge of the aluminum-plastic film and poor sealing of the battery cell cavity, making it difficult to ensure battery performance. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a packaging mold that can achieve packaging without false tabs, which is beneficial to ensuring the sealing and uniformity of battery cell packaging.

[0004] The present application also proposes a packaging device having the above packaging mold.

[0005] The packaging mold according to the first embodiment of the present application includes a first head and a second head;

[0006] The first head is provided with a first avoidance groove and two first grooves;

[0007] The second head is provided with a second avoidance groove and two second grooves;

[0008] Among them, the packaging mold includes a mold closing state. In the mold closing state, the first head abuts the second head along the first direction, the positions of the first avoidance groove and the second avoidance groove correspond to form a false tab avoidance area, and the positions of each first groove and each second groove correspond one by one to form a first accommodating area and a second accommodating area.

[0009] According to the packaging mold of the embodiment of the present application, there are at least the following beneficial effects: in the mold-closed state, the first head and the second head are used to abut the aluminum-plastic film together along the first direction to encapsulate the battery cell. Among them, the first accommodating area is used to avoid the positive electrode ear covered by the aluminum-plastic film, and the second accommodating area is used to avoid the negative electrode ear covered by the aluminum-plastic film to prevent the aluminum-plastic film, the positive electrode ear and the negative electrode ear from being over-extruded. In addition, the fake electrode ear avoidance area is used to avoid the fake electrode ear covered by the aluminum-plastic film to prevent the fake electrode ear and the aluminum-plastic film covering the fake electrode ear from being over-extruded, thereby ensuring the integrity of the fake electrode ear and the aluminum-plastic film covering the fake electrode ear. The packaging mold of the present application is used to encapsulate the battery cell containing the fake electrode ear in the mold-closed state, and avoids the positions of the positive electrode ear, negative electrode ear and fake electrode ear, effectively avoiding excessive extrusion of the positive electrode ear, negative electrode ear and fake electrode ear, which is beneficial to improving the sealing and uniformity of the battery cell packaging and ensuring the performance of the battery.

[0010] According to some embodiments of the present application, the first avoidance groove and the two first grooves are arranged at intervals along the second direction, and the first avoidance groove is located between the two first grooves, the second avoidance groove and the two second grooves are arranged along the second direction, and the second avoidance groove is located between the two second grooves, and the second direction is perpendicular to the first direction;

[0011] Wherein, in the mold closing state, along the second direction, the false tab avoidance area is located between the first accommodating area and the second accommodating area.

[0012] According to some embodiments of the present application, the first head includes two first avoidance grooves spaced apart along a second direction, and along the second direction, the two first avoidance grooves are located between the two first grooves; the second head includes two second avoidance grooves spaced apart along the second direction, and along the second direction, the two second avoidance grooves are located between the two second grooves, and the second direction is perpendicular to the first direction;

[0013] Among them, in the mold closing state, along the first direction, the positions of each first avoidance groove and each second avoidance groove are arranged one by one to form two false tab avoidance areas, and along the second direction, the two false tab avoidance areas are located between the first accommodating area and the second accommodating area.

[0014] According to some embodiments of the present application, the first head includes two first avoidance grooves, wherein one first avoidance groove, one first groove, another first avoidance groove, and another first groove are sequentially spaced and distributed along the second direction; the second head includes two second avoidance grooves, wherein one second avoidance groove, one second groove, another second avoidance groove, and another second groove are sequentially spaced and distributed along the second direction, and the second direction is perpendicular to the first direction;

[0015] Among them, in the mold closing state, along the first direction, the positions of the two first avoidance grooves and the two second avoidance grooves correspond one to one to form two fake tab avoidance areas, and along the second direction, one fake tab avoidance area, the first accommodating area, the other fake tab avoidance area, and the second accommodating area are distributed in sequence.

[0016] According to some embodiments of the present application, the first head also includes a first abutting portion, the first abutting portion is provided with a first avoidance groove and a first groove, the second head also includes a second abutting portion and a supporting portion, the second abutting portion is provided with a second avoidance groove and a second groove, along the third direction, the supporting portion and the second abutting portion are spaced apart, and the third direction is perpendicular to the first direction.

[0017] According to some embodiments of the present application, the packaging mold further includes a heating component, which is connected to the first head. In the mold closing state, the heating component elastically abuts against the second head along the first direction.

[0018] According to some embodiments of the present application, the heating assembly includes a fixed part, an elastic part and a movable part. The fixed part is connected to the first head. Along the first direction, one end of the elastic part abuts the fixed part, and the other end of the elastic part abuts the movable part. In the mold closing state, the side of the movable part facing away from the fixed part abuts the second head.

[0019] According to some embodiments of the present application, in the mold closing state, along the first direction, the size of the false tab avoidance area is 0.5 mm to 5 mm.

[0020] According to some embodiments of the present application, the first head further includes a first groove wall, and the second head further includes a second groove wall. In the mold closing state, the first groove wall and the second groove wall abut against each other along the first direction to jointly enclose a false tab avoidance area.

[0021] According to the second embodiment of the present application, the packaging device includes a driving device and a packaging mold of any of the above embodiments, the packaging mold is connected to the driving device, and the driving device is used to drive the first head and the second head to move closer to or away from each other along the first direction.

[0022] The packaging equipment according to the embodiment of the present application has at least the following beneficial effects: the driving device is used to drive the packaging mold to package the battery cell containing the fake pole ear, and the packaging mold can avoid the positive pole ear, the negative pole ear and the fake pole ear during the packaging operation, which not only avoids the packaging mold from excessively squeezing the pole ear and the aluminum-plastic film, making the packaging edge of the battery cell more uniform, but also ensures the sealing of the battery cell packaging, thereby ensuring the performance of the battery.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a structural diagram of the packaging mold in the mold closing state according to an embodiment of the present application;

[0026] Figure 2 This is a front view of the packaging mold in the mold closing state according to an embodiment of the present application;

[0027] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0028] Figure 4 This is a schematic structural diagram of the first battery to be packaged according to an embodiment of the present application;

[0029] Figure 5 This is a schematic structural diagram of a second type of battery to be packaged according to an embodiment of the present application;

[0030] Figure 6 This is a schematic structural diagram of a third type of battery to be packaged according to an embodiment of the present application;

[0031] Figure 7 This is a front view of another packaging mold in the mold closing state according to an embodiment of the present application;

[0032] Figure 8 This is an exploded view of the packaging mold of an embodiment of the present application;

[0033] Figure 9 This is a top view of the second head of the embodiment of the present application;

[0034] Figure 10 A top view of the packaging mold according to an embodiment of the present application;

[0035] Figure 11 for Figure 10 Cross-sectional view at AA in the middle.

[0036] Reference numerals: first end cap 100 , first avoidance groove 110 , first groove wall 111 , first groove 120 , false tab avoidance area 130 , first accommodating area 140 , second accommodating area 150 , temperature detection groove 160 , first limiting portion 170 , first abutting portion 180 , first glue avoidance groove 190 ;

[0037] The second head 200, the second avoidance groove 210, the second groove wall 211, the second groove 220, the support portion 230, the second limiting portion 240, the second abutting portion 250, and the second glue avoidance groove 260;

[0038] Heating assembly 300, fixing member 310, elastic member 320, moving member 330;

[0039] Aluminum-plastic film 410 , battery cell body 420 , positive electrode tab 430 , negative electrode tab 440 , and dummy electrode tab 450 . DETAILED DESCRIPTION

[0040] The following describes in detail embodiments of the present application. 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 application and are not to be construed as limiting the present application.

[0041] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0042] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0043] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0044] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 this application. 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 can be combined in any appropriate manner in any one or more embodiments or examples.

[0045] The following describes the embodiments of the present application in conjunction with the accompanying drawings:

[0046] refer to Figures 1 to 4The packaging mold according to an embodiment of the present application is used to package a battery with a dummy tab 450 connected. The battery includes a battery cell body 420, a positive tab 430, a negative tab 440, and a dummy tab 450. The positive tab 430, the negative tab 440, and the dummy tab 450 are connected to one side edge of the battery cell body 420 along a third direction. During packaging, along a first direction, both sides of the battery cell body 420, the positive tab 430, the negative tab 440, and the dummy tab 450 are covered with an aluminum-plastic film 410. In addition, a portion of the positive tab 430 and a portion of the negative tab 440 extend beyond the coverage area of the aluminum-plastic film 410 along the third direction, which is perpendicular to the first direction.

[0047] refer to Figures 1 to 4 According to an embodiment of the present application, the packaging mold includes a first head 100 and a second head 200. The first head 100 is provided with a first avoidance groove 110 and two first grooves 120, and the second head 200 is provided with a second avoidance groove 210 and two second grooves 220. The packaging mold includes a mold closing state. In the mold closing state, the first head 100 abuts the second head 200 along a first direction. The positions of the first avoidance groove 110 and the second avoidance groove 210 correspond to each other to form a pseudo-tab avoidance area 130. The positions of each first groove 120 and each second groove 220 correspond one-to-one to form a first accommodating area 140 and a second accommodating area 150. That is, in the mold closing state, the positions of one first groove 120 and one second groove 220 correspond to each other to form the first accommodating area 140, and the positions of another first groove 120 and another second groove 220 correspond to each other to form the second accommodating area 150. During the packaging operation, along the first direction, one side of the aluminum-plastic film 410 covering each pole ear is located between the first head 100 and the second head 200. The first accommodating area 140 is used to avoid the positive pole ear 430, the second accommodating area 150 is used to avoid the negative pole ear 440, and the dummy pole ear avoidance area 130 is used to avoid the dummy pole ear 450, thereby avoiding the pole ears during packaging and avoiding excessive squeezing of the aluminum-plastic film 410 and each pole ear, which is beneficial to ensuring the sealing and uniformity of the battery cell packaging.

[0048] refer to Figures 1 to 4Specifically, along the first direction, the first avoidance groove 110 and the two first grooves 120 are located on the same side of the first head 100, the second avoidance groove 210 and the two second grooves 220 are located on the same side of the second head 200, and the side of the first head 100 where the first avoidance groove 110 and the two first grooves 120 are provided is arranged toward the side of the second head 200 where the second avoidance groove 210 and the two second grooves 220 are provided. The packaging mold includes a closed mold state and a parted mold state. In the closed mold state, the first head 100 abuts the second head 200 along the first direction, and the positions of the first avoidance groove 110 and the second avoidance groove 210 correspond to form a false pole tab avoidance area 130 for avoiding the false pole tab 450. At the same time, the groove walls of the first avoidance groove 110 and the second avoidance groove 210 abut against the aluminum-plastic film 410 covering both sides of the false pole tab 450, so as to ensure the connection between the aluminum-plastic films 410 on different sides, and the connection between the aluminum-plastic film 410 and the false pole tab 450, and also avoid excessive extrusion of the aluminum-plastic film 410 and the false pole tab 450.

[0049] In addition, in the mold closing state, the positions of the two first grooves 120 and the two second grooves 220 correspond one to one to form a first accommodating area 140 and a second accommodating area 150, that is, the position of one of the first grooves 120 and the position of one of the second grooves 220 correspond to each other to form a first accommodating area 140, and the position of the other first groove 120 and the position of the other second groove 220 correspond to each other to form a second accommodating area 150. The first accommodating area 140 is used to avoid the positive electrode ear 430, and the second accommodating area 150 is used to avoid the negative electrode ear 440, which effectively avoids excessive extrusion of the aluminum-plastic film 410, the positive electrode ear 430 and the fake electrode ear 450 during the packaging operation, which is beneficial to ensuring the sealing of the battery cell packaging.

[0050] It should be noted that the side of the aluminum-plastic film 410 that contacts the positive electrode tab 430, the negative electrode tab 440 and the dummy electrode tab 450 includes a pp layer. The first head 100 and the second head 200 conduct heat to the aluminum-plastic film 410 during packaging, which is used to melt the pp layer to make the aluminum-plastic film 410 and the aluminum-plastic film 410 and each electrode tab adhere to each other, thereby achieving sealing of the battery containing the dummy electrode tab 450. The presence of the dummy electrode tab 450 makes the battery have higher energy density, lower internal resistance, excellent charge and discharge performance, etc., which is beneficial to improving the lithium plating phenomenon at the corners of the battery.

[0051] refer to Figures 1 to 4 In some embodiments, the packaging mold of the present application is used to package a battery including a battery cell body 420, a positive electrode tab 430, a dummy electrode tab 450 and a negative electrode tab 440. Along the third direction, the positive electrode tab 430, the dummy electrode tab 450 and the negative electrode tab 440 are connected to one side of the battery cell body 420, and along the second direction, the positive electrode tab 430, the dummy electrode tab 450 and the negative electrode tab 440 are arranged at intervals, and the first direction, the second direction and the third direction are perpendicular to each other.

[0052] refer to Figures 1 to 4 Based on this, the packaging mold in the present application includes a first head 100 and a second head 200. The first head 100 is provided with a first avoidance groove 110 and two first grooves 120, and the second head 200 is provided with a second avoidance groove 210 and two second grooves 220. The first avoidance groove 110 and the two first grooves 120 are arranged at intervals along the second direction, and the first avoidance groove 110 is located between the two first grooves 120. The second avoidance groove 210 and the two second grooves 220 are arranged along the second direction, and the second avoidance groove 210 is located between the two second grooves 220.

[0053] In the mold-closed state, the first end cap 100 abuts the second end cap 200 along the first direction, and the side of the battery cell body 420 connected to each tab is located between the first end cap 100 and the second end cap 200. The positions of the first avoidance groove 110 and the second avoidance groove 210 correspond to each other to form a false tab avoidance area 130. One of the first grooves 120 and one of the second grooves 220 correspond to each other to form a first accommodating area 140, and the position of the other first groove 120 and the position of the other second groove 220 correspond to each other to form a second accommodating area 150. Along the second direction, the false tab avoidance area 130 is located between the first accommodating area 140 and the second accommodating area 150. The first accommodating area 140 is used to avoid the position of the positive tab 430, the second accommodating area 150 is used to avoid the position of the negative tab 440, and the false tab avoidance area 130 is used to avoid the position of the false tab 450, which is beneficial to ensuring the sealing of the battery.

[0054] It should be noted that the fake pole tab 450 in this embodiment can be a fake negative pole tab connected to the negative electrode sheet. Along the second direction, the interval between the first accommodating area 140 and the fake pole tab avoidance area 130 is equal to the interval between the positive pole tab 430 and the fake pole tab 450, and the interval between the second accommodating area 150 and the fake pole tab avoidance area 130 is equal to the interval between the negative pole tab 440 and the fake pole tab 450, thereby ensuring the avoidance of each pole tab during the packaging operation.

[0055] refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 In some embodiments, the packaging mold of the present application is used to package a battery including a battery cell body 420, a positive electrode tab 430, two dummy electrode tabs 450 and a negative electrode tab 440. Along the third direction, the positive electrode tab 430, the two dummy electrode tabs 450 and the negative electrode tab 440 are sequentially connected to one side of the battery cell body 420, and along the second direction, the positive electrode tab 430, one of the dummy electrode tabs 450, the other dummy electrode tab 450 and the negative electrode tab 440 are sequentially arranged at intervals, and the first direction, the second direction and the third direction are perpendicular to each other.

[0056] Based on this, the packaging mold in the present application includes a first head 100 and a second head 200. The first head 100 is provided with two first grooves 120 and two first avoidance grooves 110 spaced apart along the second direction. Along the second direction, the two first avoidance grooves 110 are located between the two first grooves 120. The second head 200 includes two second grooves 220 and two second avoidance grooves 210 spaced apart along the second direction. Along the second direction, the two second avoidance grooves 210 are located between the two second grooves 220, and there is a gap between the second avoidance grooves 210 and the second grooves 220. In the mold closing state, the first head 100 abuts against the second head 200 along the first direction, and the side of the battery cell body 420 connected to each pole ear is located between the first head 100 and the second head 200, and the side of the battery cell body 420 connected to each pole ear is located between the first head 100 and the second head 200. The positions of each first avoidance groove 110 and each second avoidance groove 210 are arranged in a one-to-one correspondence to form two false pole ear avoidance areas 130, that is, one of the first avoidance grooves 110 corresponds to the position of one of the second avoidance grooves 210 to form one of the false pole ear avoidance areas 130, and the other first avoidance groove 110 corresponds to the position of the other second avoidance groove 210 to form another false pole ear avoidance area 130.

[0057] Along the first direction, one of the first grooves 120 and one of the second grooves 220 correspond to each other to form a first accommodating area 140, and the other first groove 120 and the other second groove 220 correspond to each other to form a second accommodating area 150. Along the second direction, the two fake pole tab avoidance areas 130 are located between the first accommodating area 140 and the second accommodating area 150. The first accommodating area 140 and the second accommodating area 150 are both spaced apart in the fake pole tab avoidance area 130, and the two fake pole tab avoidance areas 130 are also spaced apart. The first accommodating area 140 corresponds to the position of the positive pole tab 430, and the second accommodating area 150 corresponds to the position of the negative pole tab 440. The two fake pole tab avoidance areas 130 correspond to the positions of the fake pole tabs 450, which is beneficial to ensure the sealing of the battery.

[0058] It should be noted that the fake tabs 450 in this embodiment can be two fake negative tabs connected to the negative electrode sheet. Along the second direction, the intervals between the first accommodating area 140, one of the fake tab avoidance areas 130, the other fake tab avoidance area 130 and the second accommodating area 150 correspond to the intervals between the positive tab 430, the fake negative tab close to the positive tab 430, the fake negative tab close to the negative tab 440 and the negative tab 440, respectively.

[0059] refer to Figures 2 to 6In some embodiments, the packaging mold of the present application is used to package a battery including a battery cell body 420, a positive electrode tab 430, two dummy electrode tabs 450 and a negative electrode tab 440. Along the third direction, the positive electrode tab 430, the two dummy electrode tabs 450 and the negative electrode tab 440 are connected to one side of the battery cell body 420, and along the second direction, one of the dummy electrode tabs 450, the positive electrode tab 430, the other dummy electrode tab 450 and the negative electrode tab 440 are arranged in sequence, and the first direction, the second direction and the third direction are perpendicular to each other.

[0060] refer to Figures 2 to 6 Based on this, the packaging mold in the present application includes a first head 100 and a second head 200. The first head 100 includes two first grooves 120 and two first avoidance grooves 110. The second head 200 includes two second grooves 220 and two second avoidance grooves 210. Along the second direction, the two first avoidance grooves 110 and the two first grooves 120 are sequentially spaced apart. That is, along the second direction, the spacing distribution order is: one of the first avoidance grooves 110, one of the first grooves 120, another first avoidance groove 110, and another first groove 120. The two second avoidance grooves 210 and the two second grooves 220 are sequentially spaced apart. That is, along the second direction, the spacing distribution order is: one of the second avoidance grooves 210, one of the second grooves 220, another second avoidance groove 210, and another second groove 220.

[0061] In the mold-closed state, the first end cap 100 abuts against the second end cap 200 along the first direction, and the side of the battery cell body 420 connected to each tab is located between the first end cap 100 and the second end cap 200. The positions of the first avoidance grooves 110 and the second avoidance grooves 210 are arranged in a one-to-one correspondence to form each pseudo tab avoidance area 130, and the positions of the first grooves 120 and the second grooves 220 are arranged in a one-to-one correspondence to form a first accommodating area 140 and a second accommodating area 150. That is, one of the first avoidance grooves 110 corresponds to the position of one of the second avoidance grooves 210 to form one of the pseudo tab avoidance areas 130, and another first avoidance groove 110 corresponds to the position of another second avoidance groove 210 to form another pseudo tab avoidance area 130, one of the first grooves 120 corresponds to the position of one of the second grooves 220 to form a first accommodating area 140, and another first groove 120 corresponds to the position of another second groove 220 to form a second accommodating area 150.

[0062] Along the second direction, the first dummy tab avoidance area 130, the first accommodating area 140, the other dummy tab avoidance area 130, and the second accommodating area 150 are sequentially spaced apart. The first accommodating area 140 and the second accommodating area 150 are both spaced apart from the dummy tab avoidance area 130, and the two dummy tab avoidance areas 130 are also spaced apart. The first accommodating area 140 corresponds to the location of the positive tab 430, the second accommodating area 150 corresponds to the location of the negative tab 440, and the two dummy tab avoidance areas 130 correspond to the locations of the dummy tab 450, which is beneficial to ensure the sealing of the battery.

[0063] It should be noted that the fake pole tab 450 in this embodiment may include a fake negative pole tab connected to the negative electrode sheet and a fake positive pole tab connected to the positive electrode sheet. Along the second direction, the intervals between one fake pole tab avoidance area 130, the first accommodating area 140, another fake pole tab avoidance area 130 and the second accommodating area 150 correspond to the intervals between the fake positive pole tab, the positive pole tab 430, the fake negative pole tab and the negative pole tab 440, respectively. The interval between the second accommodating area 150 and the fake pole tab avoidance area 130 is equal to the interval between the negative pole tab 440 and the fake pole tab 450. In addition, the position and number of the false tabs 450 included in the battery to be packaged are not limited to the position and number in the above-mentioned embodiment. Accordingly, when manufacturing the packaging mold in the present application, the number and position of the first avoidance grooves 110 provided in the first head 100, as well as the number and position of the second avoidance grooves 210 provided in the second head 200, can be adjusted according to the number and position of the false tabs 450 of the battery to be packaged, so as to achieve the avoidance of the false tabs 450 during the packaging operation.

[0064] refer to Figure 8 and Figure 9 In some embodiments, the first head 100 further includes a first abutting portion 180, which is provided with a first avoidance groove 110 and a first groove 120. The second head 200 further includes a second abutting portion 250 and a supporting portion 230, which is provided with a second avoidance groove 210 and a second groove 220. Along the third direction, the supporting portion 230 and the second abutting portion 250 are spaced apart, and the third direction is perpendicular to the first direction. In the mold closing state, along the first direction, the edge of the aluminum-plastic film 410 is located between the first abutting portion 180 and the second abutting portion 250, the first abutting portion 180 abuts against one side of the aluminum-plastic film 410, and the second abutting portion 250 abuts against the other side of the aluminum-plastic film 410, which is used to encapsulate the aluminum-plastic film 410, and the supporting portion 230 is used to support the positive electrode ear 430 and the negative electrode ear 440 exposed to the aluminum-plastic film 410 along the third direction. The gap between the supporting portion 230 and the second abutting portion 250 is used to avoid the PP glue overflowing from the edge of the encapsulated aluminum-plastic film 410, to prevent the PP glue from adhering to the first head 100 and / or the second head 200, thereby reducing downtime for maintenance and helping to ensure the continuity of the encapsulation operation.

[0065] Specifically, during the packaging operation, along the first direction, the side of the aluminum-plastic film 410 covering each pole ear is placed between the first abutting portion 180 and the second abutting portion 250, and the edge of the side of the aluminum-plastic film 410 covering each pole ear is exposed in the area covered by the first abutting portion 180 and the second abutting portion 250 along the first direction. The support portion 230 supports the positive pole ear 430 and the negative pole ear 440 exposed to the aluminum-plastic film 410 along the third direction, and the gap between the support portion 230 and the second abutting portion 250 is used to accommodate the PP glue overflowing from the edge of the packaging aluminum-plastic film 410 to avoid adhesion between the first head 100 and the second head 200.

[0066] It should be noted that, along the third direction, the edge of the aluminum-plastic film 410 exposed outside the area covered by the first abutting portion 180 and the second abutting portion 250 along the first direction can be 1 mm to 2 mm, which facilitates the overflow of PP glue at the edge of the aluminum-plastic film 410, effectively avoiding the adhesion of PP glue to the packaging mold.

[0067] refer to Figures 1 to 3 In some embodiments, the first sealing head 100 includes a first limiting portion 170 and a first abutting portion 180, and the second sealing head 200 includes a second limiting portion 240 and a second abutting portion 250. Along the second direction, the first limiting portion 170 can be located on one side of the first abutting portion 180. In the mold closing state, along the first direction, the first limiting portion 170 abuts against the second limiting portion 240, so that there is a gap between the first abutting portion 180 and the second abutting portion 250. The aluminum-plastic film 410 is used to be placed between the first abutting portion 180 and the second abutting portion 250. The gap between the first abutting portion 180 and the second abutting portion 250 is used to avoid excessive extrusion of the aluminum-plastic film 410, which is beneficial to ensuring the integrity of the aluminum-plastic film 410 and thus ensuring the sealing of the battery.

[0068] refer to Figures 1 to 3 In other embodiments, the first end cap 100 includes a first abutting portion 180 and two first limiting portions 170. Along the second direction, the first abutting portion 180 is located between the two first limiting portions 170. The second end cap 200 includes a second abutting portion 250 and two second limiting portions 240. Along the second direction, the second abutting portion 250 is located between the two second limiting portions 240. The positions of the two first limiting portions 170 and the two second limiting portions 240 correspond to each other. The abutment between the two first limiting portions 170 and the two second limiting portions 240 further ensures the spacing between the first abutting portion 180 and the second abutting portion 250, thereby further ensuring the spacing and preventing slight deformation caused by the abutment between the first end cap 100 and the second end cap 200.

[0069] refer to Figures 8 to 11In some embodiments, the packaging mold further includes a heating assembly 300 connected to the first sealing head 100. In the mold-closed state, the heating assembly 300 elastically abuts the second sealing head 200 along a first direction. The positive and negative tabs 430, 440 exposed from the aluminum-plastic film 410 can be placed between the heating assembly 300 and the second sealing head 200, thereby conducting heat to the positive and negative tabs 430, 440, facilitating more uniform melting of the PP layer of the aluminum-plastic film 410 and ensuring the sealing of the package. Furthermore, the heating assembly 300 elastically abuts the positive and negative tabs 430, 440 along the first direction to prevent excessive squeezing of the positive and negative tabs 430, 440 and ensure the integrity of the positive and negative tabs 430, 440.

[0070] It should be noted that the elastic abutment between the heating component 300 and the second head 200 may be that the heating component 300 itself is elastic and generates elastic deformation when abutting against the second head 200, or the heating component 300 includes an elastic part, and the part of the heating component 300 used to abut against the second head 200 contacts the elastic part, and the elastic part of the heating component 300 generates elastic deformation so that the part of the heating component 300 abutting against the second head 200 can generate relative movement relative to the second head 200.

[0071] refer to Figures 8 to 11 In some embodiments, the packaging mold further includes a heating assembly 300, which is connected to the first sealing head 100. The second sealing head 200 is further provided with a support portion 230. The support portion 230 is spaced apart from the second groove 220 along a third direction, and the third direction is perpendicular to the first direction. In the mold-closed state, the heating assembly 300 abuts the support portion 230 along the first direction. The support portion 230 is used to support the positive electrode tab 430 and the negative electrode tab 440. The heating assembly 300 is used to conduct heat to the positive electrode tab 430 and the negative electrode tab 440 to ensure the temperature at the connection between the positive electrode tab 430 and the negative electrode tab 440. This is beneficial to further improve the sealing performance at the location where the positive electrode tab 430 and the negative electrode tab 440 are located, so that the positive electrode tab 430 and the negative electrode tab 440 are better adhered to the aluminum-plastic film 410. In addition, the gap between the supporting portion 230 and the second abutting portion 250 can also prevent the PP glue generated by the packaging aluminum-plastic film 410 from adhering to the head, which is beneficial to ensuring the continuity of the packaging operation and ensuring the packaging efficiency.

[0072] refer to Figures 8 to 11In some embodiments, the heating assembly 300 includes a fixed part 310, an elastic part 320 and a movable part 330. The fixed part 310 is connected to the first head 100. Along the first direction, one end of the elastic part 320 abuts the fixed part 310, and the other end of the elastic part 320 abuts the movable part 330. In the mold closing state, the movable part 330 abuts the support part 230 along the first direction. Among them, along the first direction, the elastic member 320 can be compressed or stretched. The setting of the elastic member 320 makes the abutment of the movable member 330 against the support portion 230 elastic. The support portion 230 is used to support the positive electrode ear 430 and the negative electrode ear 440, that is, in the mold closing state, the movable member 330 elastically abuts against the positive electrode ear 430 and the negative electrode ear 440 to avoid excessive squeezing of the positive electrode ear 430 and the negative electrode ear 440. Therefore, on the basis of ensuring heat conduction to the positive electrode ear 430 and the negative electrode ear 440, it is beneficial to ensure the integrity of the positive electrode ear 430 and the negative electrode ear 440.

[0073] Specifically, the first head 100 and the second head 200 move relative to each other along the first direction to switch between the mold closing state and the mold opening state. The fixed part 310, the elastic part 320 and the movable part 330 can move together with the first head 100. When the first head 100 and the second head 200 approach each other until the movable part 330 abuts the support part 230 along the first direction, the movable part 330 moves relative to the first head 100 along the first direction, and the elastic part 320 is compressed along the first direction. The parts of the positive ear 430 and the negative ear 440 extending outward from the edge of the aluminum-plastic film 410 along the third direction are supported on the support part 230. The movable part 330 elastically abuts against the positive ear 430 and the negative ear 440, which not only ensures heat conduction to the positive ear 430 and the negative ear 440, but also avoids excessive squeezing of the positive ear 430 and the negative ear 440.

[0074] refer to Figures 7 to 9 In some embodiments, the first head 100 is further provided with two first glue avoidance grooves 190, and the second head 200 is further provided with two second glue avoidance grooves 260. Along the second direction, the first avoidance groove 110 and the two first grooves 120 are located between the two first glue avoidance grooves 190, and the second avoidance groove 210 and the two second grooves 220 are located between the two second glue avoidance grooves 260. In the mold closing state, one of the first glue avoidance grooves 190 corresponds to one of the second glue avoidance grooves 260 to form a first glue avoidance area, and the other first glue avoidance groove 190 corresponds to the other second glue avoidance groove 260 to form a second glue avoidance area. Along the second direction, a portion of the edge portion on both sides of the aluminum-plastic film 410 is located in the first glue avoidance area, and a portion of the other side is located in the second glue avoidance area. The first glue avoidance area and the second glue avoidance area are used to avoid PP glue overflowing from the encapsulation aluminum-plastic film 410.

[0075] refer to Figures 7 to 11In other embodiments, during the packaging operation, the first glue-avoiding area and the second glue-avoiding area are used to avoid the PP glue overflowing from both sides of the aluminum-plastic film 410 along the second direction. Along the third direction, the gap between the support portion 230 and the second abutting portion 250 is used to avoid the PP glue overflowing from the edge of the aluminum-plastic film 410 close to the support portion 230, which is beneficial to prevent the PP glue from adhering to the head during the packaging operation.

[0076] refer to Figures 1 to 3 In some embodiments, along the first direction, the height of the fake tab avoidance area 130 is 0.5 mm to 5 mm, that is, along the first direction, the sum of the depth of the first avoidance groove 110 and the depth of the second avoidance groove 210 is the height of the fake tab avoidance area 130, which is used to adaptively accommodate fake tabs 450 with different thicknesses.

[0077] Specifically, the first direction can be a vertical direction. Along the first direction, the height of the fake tab avoidance area 130 can be any value in any range of 0.5mm to 1mm, 1mm to 1.5mm, 1.5mm to 2mm, 2mm to 2.5mm, 2.5mm to 3mm, 3mm to 3.5mm, 3.5mm to 4mm, 4mm to 4.5mm and 4.5mm to 5mm. When producing the packaging mold, the height of the fake tab avoidance area 130 can be selected according to the height adaptability of the fake tab 450, which is beneficial to ensure the avoidance of the fake tab 450 and the sealing of the package.

[0078] refer to Figure 8 and Figure 9 In some embodiments, the first head 100 further includes a first groove wall 111, and the second head 200 further includes a second groove wall 211. In the mold-closed state, the first groove wall 111 and the second groove wall 211 abut against each other along the first direction to jointly enclose the avoidance area 130 of the false pole tab 450. Along the third direction, one end of the false pole tab 450 is connected to the battery cell body 420. The first groove wall 111 and the second groove wall 211 are used to seal the aluminum-plastic film 410 on the side of the false pole tab 450 facing away from the battery cell body 420. In addition, along the second direction, the first groove wall 111 and the second groove wall 211 are also used to seal the aluminum-plastic film 410 located on opposite sides of the false pole tab 450, which is beneficial to ensure the sealing of adjacent false pole tabs 450.

[0079] It should be noted that the first groove wall 111 is the groove wall of the first avoidance groove 110 , and the second groove wall 211 is the groove wall of the second avoidance groove 210 .

[0080] refer to Figure 8In the packaging device of any of the above embodiments, both the first and second sealing heads 100 and 200 maintain a certain temperature when in the molded state, heating the aluminum-plastic film 410. The PP layer of the aluminum-plastic film 410 melts, achieving adhesion between the films 410 and between the films and the tabs. Accordingly, both the first and second sealing heads 100 and 200 are equipped with temperature detection slots 160, which are used to mount temperature sensors to measure the temperatures of the first and second sealing heads 100 and 200, respectively, thereby ensuring the quality of battery packaging.

[0081] refer to Figures 1 to 11 According to the packaging device of the embodiment of the present application, it includes a driving device and the packaging mold in any of the above embodiments. The packaging mold is connected to the driving device. The packaging mold includes a first head 100 and a second head 200. The driving device is used to drive the first head 100 and the second head 200 to move closer to or away from each other in a first direction to realize the switching of the packaging mold between the demolding state and the closing state. In the demolding state, the first head 100 and the second head 200 are spaced apart along the first direction. In the closing state, the first head 100 abuts against the second head 200 along the first direction, which is used to encapsulate the battery cell containing the fake pole ear 450, which is beneficial to ensure the sealing of the battery cell after packaging.

[0082] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A packaging mold, characterized in that: include: The first head is provided with a first avoidance groove and two first grooves; The second head is provided with a second avoidance groove and two second grooves; In which, the packaging mold includes a mold closing state, in which the first head abuts the second head along a first direction, the positions of the first avoidance groove and the second avoidance groove correspond to each other to form a false tab avoidance area, and the positions of each first groove and each second groove correspond one-to-one to form a first accommodating area and a second accommodating area.

2. The packaging mold according to claim 1, characterized in that: The first avoidance groove and the two first grooves are arranged at intervals along a second direction, and the first avoidance groove is located between the two first grooves; the second avoidance groove and the two second grooves are arranged along the second direction, and the second avoidance groove is located between the two second grooves, and the second direction is perpendicular to the first direction; Wherein, in the mold closing state, along the second direction, the false tab avoidance area is located between the first accommodating area and the second accommodating area.

3. The packaging mold according to claim 1, characterized in that: The first end cap includes two first avoidance grooves spaced apart along a second direction, and along the second direction, the two first avoidance grooves are located between the two first grooves; the second end cap includes two second avoidance grooves spaced apart along the second direction, and along the second direction, the two second avoidance grooves are located between the two second grooves, and the second direction is perpendicular to the first direction; In the mold closing state, along the first direction, the positions of each first avoidance groove and each second avoidance groove are arranged one by one to form two false tab avoidance areas, and along the second direction, the two false tab avoidance areas are located between the first accommodating area and the second accommodating area.

4. The packaging mold according to claim 1, characterized in that The first end cover includes two first avoidance grooves, wherein one first avoidance groove, one first groove, another first avoidance groove, and another first groove are sequentially spaced apart along the second direction; the second end cover includes two second avoidance grooves, wherein one second avoidance groove, one second groove, another second avoidance groove, and another second groove are sequentially spaced apart along the second direction, and the second direction is perpendicular to the first direction; Among them, in the mold closing state, along the first direction, the positions of the two first avoidance grooves and the two second avoidance grooves correspond one to one to form two fake tab avoidance areas, and along the second direction, one of the fake tab avoidance areas, the first accommodating area, the other fake tab avoidance area, and the second accommodating area are distributed in sequence.

5. The packaging mold according to claim 1, wherein: The first head also includes a first abutting portion, which is provided with the first avoidance groove and the first groove. The second head also includes a second abutting portion and a supporting portion, which is provided with the second avoidance groove and the second groove. Along a third direction, the supporting portion and the second abutting portion are spaced apart, and the third direction is perpendicular to the first direction.

6. The packaging mold according to claim 1, characterized in that The packaging mold further includes a heating component connected to the first sealing head. In the mold closing state, the heating component elastically abuts against the second sealing head along the first direction.

7. The packaging mold according to claim 6, characterized in that: The heating assembly includes a fixed part, an elastic part and a movable part. The fixed part is connected to the first head. Along the first direction, one end of the elastic part abuts the fixed part, and the other end of the elastic part abuts the movable part. In the mold closing state, the side of the movable part facing away from the fixed part abuts the second head.

8. The packaging mold according to claim 1, wherein: In the mold closing state, along the first direction, the size of the false tab avoidance area is 0.5 mm to 5 mm.

9. The packaging mold according to any one of claims 1 to 8, characterized in that: The first end cap further includes a first groove wall, and the second end cap further includes a second groove wall. In the mold closing state, the first groove wall and the second groove wall abut against each other along a first direction to jointly enclose the false tab avoidance area.

10. A packaging device, characterized in that: include: Drive device; The packaging mold according to any one of claims 1 to 9, wherein the packaging mold is connected to the driving device, and the driving device is used to drive the first head and the second head to move closer to or away from each other along the first direction.

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