Battery top sealing device and method

Abstract

The invention relates to a battery top sealing device and method. The battery top sealing device comprises a rack, an upper sealing head mechanism, a lower sealing head mechanism and a roller mechanism, and the rack comprises a first connecting plate and a second connecting plate which are arranged at an interval; the upper sealing head mechanism is mounted on the second connecting plate, the lower sealing head mechanism is mounted on the first connecting plate, and the upper sealing head mechanism and the lower sealing head mechanism are oppositely arranged and are used for sealing a battery hot-pressing aluminum plastic film to be processed; and the roller mechanism is mounted on the first connecting plate, is arranged on one side of the lower sealing head mechanism, and is used for rolling an aluminum plastic film seal of the battery to be processed. The battery top sealing device has the advantages of being high in production yield and good in production quality.

Description

Technical Field

[0001] This application relates to the technical field of battery top sealing, and particularly to a battery top sealing device and method. Background Art

[0002] The core of a soft-pack battery is formed by stacking a positive electrode sheet, a separator, and a negative electrode sheet in sequence, then welding the positive and negative electrode tabs, encapsulating it with an aluminum-plastic film externally, and finally injecting electrolyte and sealing it. A glove box is a sealed box with a built-in circulation and purification function. The water and oxygen content in the atmosphere inside the glove box can reach as low as 0.1 ppm. Therefore, to avoid the reaction of metallic lithium with water or oxygen, the production of soft-pack batteries is usually completed inside the glove box.

[0003] However, in an environment with extremely low water and oxygen content in the glove box, the aluminum-plastic film is extremely prone to curling and wrinkling. Especially after steps such as trimming, re-opening, inserting the core into the shell, and re-folding, the edges of the aluminum-plastic film curl more severely. With the existing packaging equipment and technology, especially for large-size soft-pack batteries, the curling of the top-sealing edge of the aluminum-plastic film is likely to cause problems such as sealing wrinkles or air-channel imprints, posing a risk of poor sealing and seriously affecting product quality and production yield. Summary of the Invention

[0004] Based on this, in view of the problem of low yield caused by the curling of the aluminum-plastic film, it is necessary to provide a battery top sealing device.

[0005] A battery top sealing device includes:

[0006] A frame, the frame includes a first connecting plate and a second connecting plate arranged at intervals;

[0007] An upper head mechanism and a lower head mechanism, the upper head mechanism is installed on the second connecting plate, the lower head mechanism is installed on the first connecting plate, the upper head mechanism and the lower head mechanism are arranged opposite to each other, and the upper head mechanism and the lower head mechanism are used for hot pressing and sealing the battery to be processed;

[0008] A roller mechanism, the roller mechanism is installed on the first connecting plate, the roller mechanism is arranged on one side of the lower head mechanism, and the roller mechanism is used for rolling the aluminum-plastic film of the battery to be processed.

[0009] In one embodiment, the upper head mechanism includes an upper head, an upper heating block, an upper support plate, and an upper air cylinder. The upper air cylinder is installed on the second connecting plate, and the output end of the upper air cylinder faces the lower head mechanism. The upper air cylinder is connected to the upper support plate. The upper support plate is connected to the upper heating block on the side close to the lower head mechanism, and the upper head is connected to the upper heating block.

[0010] In one embodiment, the lower head mechanism includes a lower head, a lower heating block, a lower support plate, and a lower cylinder. The lower cylinder is installed on the first connecting plate, and the output end of the lower cylinder faces the lower head mechanism. The lower cylinder is connected to the lower support plate. The lower support plate is connected to the lower heating block on the side close to the upper head mechanism. The lower head is connected to the lower heating block. The sealing knives of the upper head and the lower head are arranged opposite to each other.

[0011] In one embodiment, the roller mechanism includes a guide rail cylinder, a cylinder slider, a roller support, and a roller mounting rod. The guide rail cylinder is arranged on the first connecting plate along the length direction of the sealing knife of the lower head. The cylinder slider is movably arranged on the guide rail cylinder. The roller support is connected to the cylinder slider. The roller mounting rod is movably installed on the roller support through a pin. A roller is provided at one end of the roller mounting rod away from the roller support. The roller is movably arranged on the sealing knife of the lower head. A jacking spring is arranged in the roller support, and the jacking spring is connected to one end of the roller mounting rod close to the roller support.

[0012] In one embodiment, the roller mechanism further includes a first baffle and a second baffle. The first baffle and the second baffle are installed on the first connecting plate, and the first baffle and the second baffle are respectively arranged at the starting end and the ending end of the moving path of the roller mounting rod. The upper surfaces of the first baffle and the second baffle are both higher than the surface of the lower head. The first baffle and the second baffle are used to lift the roller mounting rod that moves to both ends of the lower head.

[0013] In one embodiment, the upper head mechanism further includes an upper tab auxiliary heating block. The upper tab auxiliary heating block is connected to the upper support plate, and the heating surface of the upper tab auxiliary heating block is parallel to the surface of the sealing knife of the upper head.

[0014] The lower head mechanism further includes a lower tab auxiliary heating block. The lower tab auxiliary heating block is connected to the lower support plate, and the heating surface of the lower tab auxiliary heating block is parallel to the surface of the sealing knife of the lower head.

[0015] In one embodiment, a first heat insulation plate is provided between the upper support plate and the upper heating block; a second heat insulation plate is provided between the lower support plate and the lower heating block.

[0016] In one embodiment, the sealing knife of the upper head is provided with a first tab groove, and the sealing knife of the lower head is provided with a second tab groove.

[0017] In one of the embodiments, first glue overflow grooves are provided at both ends of the sealing knife of the upper head, and second glue overflow grooves are provided at both ends of the sealing knife of the lower head.

[0018] Second, a battery top sealing method is also provided, which uses the battery top sealing device described in any of the above embodiments, and includes the following steps:

[0019] S100: Energize the upper heating block of the upper head mechanism and the lower heating block of the lower head mechanism;

[0020] S200: Place the edge of the aluminum-plastic film of the battery to be processed on the lower head mechanism;

[0021] S300: The roller mechanism rolls the edge of the aluminum-plastic film;

[0022] S400: The upper head mechanism and the lower head mechanism move towards each other to perform hot pressing on the edge of the aluminum-plastic film of the battery to be processed;

[0023] S500: The upper head mechanism and the lower head mechanism move away from each other to complete the battery top sealing process.

[0024] The above battery top sealing device performs hot pressing on the aluminum-plastic film of the battery to be processed by setting the upper head mechanism and the lower head mechanism to move towards each other on the frame. By also setting the roller mechanism to roll the aluminum-plastic film of the battery to be processed before hot pressing, it can avoid problems such as wrinkles and air channels on the seal caused by warping of the aluminum-plastic film in the dry atmosphere of the glove box, effectively improving the quality and qualification rate of battery products. At the same time, the roller mechanism has the advantages of simple structure, low cost, high reliability, and strong stability. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the battery top sealing device described in the embodiment of the present application.

[0026] Figure 2 It is a side view of the battery top sealing device described in the embodiment of the present application.

[0027] Figure 3 It is a front view of the battery top sealing device described in the embodiment of the present application.

[0028] Figure 4 It is a schematic structural diagram of the upper head and the lower head of the battery top sealing device described in the embodiment of the present application.

[0029] Figure 5 It is a schematic structural diagram of the roller mechanism of the battery top sealing device described in the embodiment of the present application.

[0030] Figure 6 It is an enlarged schematic diagram of the roller mechanism of the battery top sealing device described in the embodiment of the present application.

[0031] Figure 7 Perspective view of the roller support of the battery top sealing device described in the embodiments of the present application.

[0032] Reference numerals in the attached drawings: 10, battery to be processed;

[0033] 100, frame; 110, bottom plate; 120, first support column; 130, first connecting plate; 140, second support column; 150, second connecting plate;

[0034] 200, upper sealing head mechanism; 210, upper sealing head; 220, upper heating block; 230, upper support plate; 240, upper cylinder; 250, upper tab auxiliary heating block; 261, upper guide sleeve; 262, upper guide post; 271, upper connecting block; 272, upper floating connector;

[0035] 300, lower sealing head mechanism; 310, lower sealing head; 310A, second tab groove; 310B, second glue overflow groove; 320, lower heating block; 330, lower support plate; 340, lower cylinder; 350, lower tab auxiliary heating block; 361, lower guide sleeve; 362, lower guide post; 371, lower connecting block; 372, lower floating connector;

[0036] 400, roller mechanism; 410, guide rail cylinder; 420, cylinder slider; 430, roller support; 431, pin; 432, lifting spring; 440, roller mounting rod; 450, roller; 461, first baffle; 462, second baffle. Detailed implementation manners

[0037] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation of the present application.

[0039] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0043] Refer to Figure 1 and Figure 2 , Figure 1 and Figure 2The structural schematic diagram of the battery top-sealing device in an embodiment of the present application is shown. The battery top-sealing device provided by an embodiment of the present application includes a frame 100, an upper sealing head mechanism 200, a lower sealing head mechanism 300, and a roller mechanism 400. The frame 100 includes a bottom plate 110, a first support column 120, a first connecting plate 130, a second support column 140, and a second connecting plate 150. The first support column 120 is installed on the bottom plate 110, the first connecting plate 130 is installed on the first support column 120, the bottom of the second support column 140 is installed on the first connecting plate 130, and the second connecting plate 150 is installed on the second support column 140, so that the first connecting plate 130 and the second connecting plate 150 are arranged at intervals. The upper sealing head mechanism 200 is installed on the second connecting plate 150, the lower sealing head mechanism 300 is installed on the first connecting plate 130, the upper sealing head mechanism 200 and the lower sealing head mechanism 300 are arranged opposite to each other, and the upper sealing head mechanism 200 and the lower sealing head mechanism 300 are used for hot-pressing the aluminum-plastic film sealing of the battery 10 to be processed. The roller mechanism 400 is installed on the first connecting plate 130, the roller mechanism 400 is arranged on one side of the lower sealing head mechanism 300, and the roller mechanism 400 is used for rolling the aluminum-plastic film sealing of the battery 10 to be processed.

[0044] The battery top-sealing device described in the embodiment of the present application is used for sealing the aluminum-plastic film of the battery 10 to be processed in the closed environment of the glove box, and at the same time, dry inert gas is injected into the glove box to protect the positive and negative electrode materials, electrolytes, etc. that are easy to react with water or oxygen. By setting the first support column 120 on the bottom plate 110, the first connecting plate 130 is connected to the first support column 120, the second support column 140 is arranged on the first connecting plate 130, and the second connecting plate 150 is connected to the second support column 140, thus forming a frame 100 with a multi-layer structure. The bottom plate 110 of the frame 100 can be installed and fixed in the glove box, the upper sealing head mechanism 200 is installed on the second connecting plate 150, the lower sealing head mechanism 300 is installed on the first connecting plate 130, and the upper sealing head mechanism 200 and the lower sealing head mechanism 300 are arranged facing each other and can move towards each other to hot-press and seal the aluminum-plastic film of the battery 10 to be processed. Further, before hot-pressing, through the roller mechanism 400 arranged on the first connecting plate 130, the aluminum-plastic film of the battery 10 to be processed can be rolled.

[0045] The battery top-sealing device described in the embodiment of the present application can avoid the problems of wrinkles and air channels in the sealed aluminum-plastic film caused by the warping of the aluminum-plastic film under the dry atmosphere of the glove box by setting the roller mechanism 400 to roll the aluminum-plastic film of the battery 10 to be processed before hot-pressing, effectively improving the quality and qualification rate of battery products. At the same time, the roller mechanism 400 has the advantages of simple structure, low cost, high reliability, and strong stability.

[0046] Combined Figure 3 as shown Figure 3The structural schematic diagrams of the upper head mechanism 200 and the lower head mechanism 300 of the battery top sealing device in an embodiment of the present application are shown. In some embodiments, the upper head mechanism 200 includes an upper head 210, an upper heating block 220, an upper support plate 230, and an upper cylinder 240. The upper cylinder 240 is installed on the second connecting plate 150, and the output end of the upper cylinder 240 faces the lower head mechanism 300. The upper cylinder 240 is connected to the upper support plate 230. The upper support plate 230 is connected to the upper heating block 220 on the side close to the lower head mechanism 300, and the upper head 210 is connected to the upper heating block 220. By arranging the upper cylinder 240 on the second connecting plate 150, the upper cylinder 240 drives the upper support plate 230, and then drives the upper heating block 220 and the upper head 210 to move up and down. Since the upper head 210 is connected to the upper heating block 220, the upper heating block 220 heats the upper head 210.

[0047] Further, as Figure 3 shown, the lower head mechanism 300 includes a lower head 310, a lower heating block 320, a lower support plate 330, and a lower cylinder 340. The lower cylinder 340 is installed on the first connecting plate 130, and the output end of the lower cylinder 340 faces the lower head mechanism 300. The lower cylinder 340 is connected to the lower support plate 330. The lower support plate 330 is connected to the lower heating block 320 on the side close to the upper head mechanism 200, and the lower head 310 is connected to the lower heating block 320. The sealing knives of the upper head 210 and the lower head 310 are arranged oppositely. By arranging the lower cylinder 340 on the first connecting plate 130, the lower cylinder 340 drives the lower support plate 330, and then drives the lower heating block 320 and the lower head 310 to move up and down. Since the lower head 310 is connected to the lower heating block 320, the lower heating block 320 heats the lower head 310. When hot pressing the battery 10 to be processed, the upper heating block 220 heats the upper head 210, the lower heating block 320 heats the lower head 310, and then the upper cylinder 240 and the lower cylinder 340 drive the upper head 210 and the lower head 310 to move towards each other respectively to hot press the aluminum plastic film and complete the encapsulation process.

[0048] In an alternative embodiment, as Figures 5 to 7As shown in the figure, the roller mechanism 400 includes a guide rail cylinder 410, a cylinder slider 420, a roller support 430, and a roller mounting rod 440. The sealing knife of the lower head 310 is a long and narrow end face provided on the lower head 310. The guide rail cylinder 410 is arranged on the first connecting plate 130 along the length direction of the sealing knife of the lower head 310. The cylinder slider 420 is movably arranged on the guide rail cylinder 410. The roller support 430 is connected to the cylinder slider 420. The roller mounting rod 440 is movably mounted on the roller support 430 through a pin 431. A roller 450 is provided at one end of the roller mounting rod 440 away from the roller support 430. The roller 450 is movably arranged on the sealing knife of the lower head 310. A jacking spring 432 is arranged inside the roller support 430. The jacking spring 432 is connected to one end of the roller mounting rod 440 close to the roller support 430. By arranging the guide rail cylinder 410 and the cylinder slider 420, the roller support 430 is driven to move horizontally. The roller mounting rod 440 is pushed by the jacking spring 432, so that the end with the roller 450 abuts against the sealing knife of the lower head 310. When the aluminum-plastic film is placed on the sealing knife of the lower head 310, the guide rail cylinder 410 drives the roller mounting rod 440 to move horizontally, thereby driving the roller 450 pressing on the aluminum-plastic film to roll the aluminum-plastic film. Under the rolling action of the roller 450, the PP layers of the two layers of aluminum-plastic film are partially dissolved, so that the two layers of aluminum-plastic film are adhered without warping, and the curled aluminum-plastic film is also flattened, thus avoiding the problems of wrinkles and air channels in the sealed aluminum-plastic film caused by the warping of the aluminum-plastic film, and effectively improving the quality and qualification rate of battery products.

[0049] Further, as Figure 5As shown, the roller mechanism 400 further includes a first baffle 461 and a second baffle 462. The first baffle 461 and the second baffle 462 are installed on the first connecting plate 130, and the first baffle 461 and the second baffle 462 are respectively disposed at the starting end and the ending end of the moving path of the roller mounting rod 440. The upper surfaces of the first baffle 461 and the second baffle 462 are both higher than the surface of the lower head 310. The first baffle 461 and the second baffle 462 are used to lift the roller mounting rod 440 that moves to both ends of the lower head 310. The places where the first baffle 461 and the second baffle 462 are initially in contact with the roller mounting rod 440 are rounded. By respectively arranging the first baffle 461 and the second baffle 462 at the starting end and the ending end of the moving path of the roller mounting rod 440, when the roller 450 does not need to roll the aluminum plastic film, the roller mounting rod 440 moves to both sides. Since the upper surfaces of the first baffle 461 and the second baffle 462 are both higher than the surface of the lower head 310, under the action of the first baffle 461 or the second baffle 462, the roller mounting rod 440 will lift the roller 450 away from the lower head 310, thus avoiding affecting the hot pressing operation. Further, the first baffle 461 and the second baffle 462 are used to control the lifting and lowering when the roller mounting rod 440 moves, and can also avoid the second glue overflow groove 310B on the lower head 310, so as not to wear the roller 450 and the lower head 310.

[0050] In an alternative embodiment, as Figure 3 shown, the upper head mechanism 200 further includes two upper guide sleeves 261 and two upper guide posts 262. The two upper guide sleeves 261 are installed on the second connecting plate 150. The two upper guide posts 262 are connected to the upper support plate 230, and the upper guide posts 262 are movably inserted into the upper guide sleeves 261. The lower head mechanism 300 further includes two lower guide sleeves 361 and two lower guide posts 362. The two lower guide sleeves 361 are installed on the first connecting plate 130. The two lower guide posts 362 are connected to the lower support plate 330, and the lower guide posts 362 are movably inserted into the lower guide sleeves 361. By providing the upper guide sleeves 361 and the upper guide posts 262, the movement of the upper support plate 230 and the upper head 210 in the vertical direction set by the upper guide sleeves 261 is defined, and by providing the lower guide sleeves 361 and the lower guide posts 362, the movement of the lower support plate 330 and the lower head 310 in the vertical direction set by the lower guide sleeves 361 is defined, so as to ensure the accurate movement direction of the upper head 210 and the lower head 310 and improve the movement stability.

[0051] In an alternative embodiment, as Figure 3As shown, the moving end of the upper air cylinder 240 is provided with an upper floating connector 272, and the upper support plate 230 is provided with an upper connecting block 271. The upper floating connector 272 is connected to the upper connecting block 271, so that the upper air cylinder 240 drives the upper support plate 230 to move. Similarly, the moving end of the lower air cylinder 340 is provided with a lower floating connector 372, and the lower support plate 330 is provided with a lower connecting block 371. The lower floating connector 372 is connected to the lower connecting block 371, so that the lower air cylinder 340 drives the lower support plate 330 to move.

[0052] In an alternative embodiment, as Figure 4 shown, the upper head mechanism 200 further includes an upper tab auxiliary heating block 250. The upper tab auxiliary heating block 250 is connected to the upper support plate 230, and the heating surface of the upper tab auxiliary heating block 250 is parallel to the sealing knife surface of the upper head 210. The lower head mechanism 300 further includes a lower tab auxiliary heating block 350. The lower tab auxiliary heating block 350 is connected to the lower support plate 330, and the heating surface of the lower tab auxiliary heating block 350 is parallel to the sealing knife surface of the lower head 310. By providing the upper tab auxiliary heating block 250 and the lower tab auxiliary heating block 350, when the upper head mechanism 200 and the lower head mechanism 300 are closed for hot pressing, the upper tab auxiliary heating block 250 and the lower tab auxiliary heating block 350 are also closed to heat the tabs of the battery to be processed. The function is to press and heat the metal plates of the tabs during sealing, avoiding poor sealing of the aluminum-plastic film caused by low temperature at the plate due to heat dissipation of the plate.

[0053] In an alternative embodiment, as Figure 4 shown, the sealing knife of the upper head 210 is provided with a first tab groove, and the sealing knife of the lower head 310 is provided with a second tab groove 310A. By providing the first tab groove and the second tab groove 310A, when sealing, the tab metal plates of the battery to be processed are placed in the gap between the first tab groove and the second tab groove 310A. Further, as Figure 4 shown, both ends of the sealing knife of the upper head 210 are provided with first overflow glue grooves, and both ends of the sealing knife of the lower head 310 are provided with second overflow glue grooves 310B. By providing the first overflow glue grooves and the second overflow glue grooves 310B, when the aluminum-plastic film is placed on the sealing knife, both ends of the aluminum-plastic film are correspondingly placed in the first overflow glue grooves and the second overflow glue grooves 310B. The first overflow glue grooves and the second overflow glue grooves 310B are used to accommodate the PP glue layer that overflows from the edge when hot pressing the aluminum-plastic film. Positioning blocks can also be provided on both sides of the upper head 210 and the lower head 310 to limit the sealing thickness after the aluminum-plastic film is soled.

[0054] In an alternative embodiment, a first heat insulation plate is provided between the upper support plate 230 and the upper heating block 220; a second heat insulation plate is provided between the lower support plate 330 and the lower heating block 320. By providing the first heat insulation plate between the upper support plate 230 and the upper heating block 220, and the second heat insulation plate between the lower support plate 330 and the lower heating block 320, it is possible to prevent the upper support plate 230 from coming into direct contact with the upper heating block 220, and the lower support plate 330 from coming into direct contact with the lower heating block 320, which may cause deformation due to temperature rise. Further, the upper support plate 230 and the lower support plate 330 are also provided with ejector screws, which can be used to adjust the parallelism of the upper head 210 and the lower head 310.

[0055] On the other hand, a battery top sealing method according to an embodiment of the present application uses the battery top sealing device described in any of the above embodiments, and includes the following steps:

[0056] S100: Energize the upper heating block 220 of the upper head mechanism 200 and the lower heating block 320 of the lower head mechanism 300;

[0057] S200: Place the aluminum-plastic film edge of the battery 10 to be processed on the lower head mechanism 300;

[0058] S300: The roller mechanism 400 rolls the aluminum-plastic film edge;

[0059] S400: The upper head mechanism 200 and the lower head mechanism 300 move towards each other to thermally press the aluminum-plastic film edge of the battery 10 to be processed;

[0060] S500: The upper head mechanism 200 and the lower head mechanism 300 move away from each other to complete the battery top sealing process.

[0061] In the battery top sealing method according to the embodiment of the present application, by providing the roller mechanism 400 to roll the aluminum-plastic film of the battery 10 to be processed before thermal pressing, it is possible to avoid problems such as wrinkles on the seal and air channels caused by warping of the aluminum-plastic film in the dry atmosphere of the glove box, effectively improving the quality and qualification rate of battery products. At the same time, the roller mechanism has the advantages of simple structure, low cost, high reliability and strong stability.

[0062] The battery top sealing device and method according to the embodiment of the present application have the following beneficial effects:

[0063] 1. By providing the roller mechanism 400 to roll the aluminum-plastic film of the battery 10 to be processed before thermal pressing, it is possible to avoid problems such as wrinkles on the seal and air channels caused by warping of the aluminum-plastic film in the dry atmosphere of the glove box, effectively improving the quality and qualification rate of battery products. At the same time, the roller mechanism has the advantages of simple structure, low cost, high reliability and strong stability.

[0064] 2. The first baffle 461 and the second baffle 462 are provided to control the lifting and lowering of the roller mounting rod 440 during movement, so as to avoid the second glue overflow groove 310B on the lower head 310 and prevent the roller 450 and the lower head 310 from being worn.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0066] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery top-sealing device, characterized in that, Including: A frame (100), the frame (100) includes a first connecting plate (130) and a second connecting plate (150) arranged at intervals; An upper head mechanism (200) and a lower head mechanism (300), the upper head mechanism (200) is installed on the second connecting plate (150), the lower head mechanism (300) is installed on the first connecting plate (130), the upper head mechanism (200) and the lower head mechanism (300) are arranged opposite to each other, and the upper head mechanism (200) and the lower head mechanism (300) are used for hot pressing and sealing the aluminum-plastic film of the battery (10) to be processed; A roller mechanism (400), the roller mechanism (400) is installed on the first connecting plate (130), the roller mechanism (400) is arranged on one side of the lower head mechanism (300), and the roller mechanism (400) is used for rolling and pressing the aluminum-plastic film seal of the battery (10) to be processed.

2. The battery top-sealing device according to claim 1, characterized in that: The upper head mechanism (200) includes an upper head (210), an upper heating block (220), an upper support plate (230) and an upper cylinder (240), the upper cylinder (240) is installed on the second connecting plate (150), and the output end of the upper cylinder (240) faces the lower head mechanism (300), the upper cylinder (240) is connected to the upper support plate (230), the upper support plate (230) is connected to the upper heating block (220) on the side close to the lower head mechanism (300), and the upper head (210) is connected to the upper heating block (220).

3. The battery top-sealing device according to claim 2, characterized in that: The lower head mechanism (300) includes a lower head (310), a lower heating block (320), a lower support plate (330) and a lower cylinder (340), the lower cylinder (340) is installed on the first connecting plate (130), and the output end of the lower cylinder (340) faces the lower head mechanism (300), the lower cylinder (340) is connected to the lower support plate (330), the lower support plate (330) is connected to the lower heating block (320) on the side close to the upper head mechanism (200), the lower head (310) is connected to the lower heating block (320), and the sealing knives of the upper head (210) and the lower head (310) are arranged opposite to each other.

4. The battery top-sealing device according to claim 3, characterized in that: The roller mechanism (400) includes a guide rail cylinder (410), a cylinder slider (420), a roller support (430), and a roller mounting rod (440). The guide rail cylinder (410) is disposed on the first connecting plate (130) along the length direction of the sealing knife of the lower head (310). The cylinder slider (420) is movably disposed on the guide rail cylinder (410). The roller support (430) is connected to the cylinder slider (420). The roller mounting rod (440) is movably mounted on the roller support (430) through a pin (431). One end of the roller mounting rod (440) away from the roller support (430) is provided with a roller (450). The roller (450) is movably disposed on the sealing knife of the lower head (310). A lifting spring (432) is disposed inside the roller support (430). The lifting spring (432) is connected to one end of the roller mounting rod (440) close to the roller support (430).

5. The battery top sealing device according to claim 4, wherein: The roller mechanism (400) further includes a first baffle (461) and a second baffle (462). The first baffle (461) and the second baffle (462) are mounted on the first connecting plate (130), and the first baffle (461) and the second baffle (462) are respectively disposed at the starting end and the ending end of the moving path of the roller mounting rod (440). The upper surfaces of the first baffle (461) and the second baffle (462) are both higher than the surface of the lower head (310). The first baffle (461) and the second baffle (462) are used to lift the roller mounting rod (440) moving to both ends of the lower head (310).

6. The battery top sealing device according to claim 3, wherein: The upper head mechanism (200) further includes an upper tab auxiliary heating block (250). The upper tab auxiliary heating block (250) is connected to the upper support plate (230). The heating surface of the upper tab auxiliary heating block (250) is parallel to the sealing knife surface of the upper head (210). The lower head mechanism (300) further includes a lower tab auxiliary heating block (350). The lower tab auxiliary heating block (350) is connected to the lower support plate (330). The heating surface of the lower tab auxiliary heating block (350) is parallel to the sealing knife surface of the lower head (310).

7. The battery top sealing device according to any one of claims 3-6, wherein: A first heat insulation plate is provided between the upper support plate (230) and the upper heating block (220); a second heat insulation plate is provided between the lower support plate (330) and the lower heating block (320).

8. The battery top sealing device according to any one of claims 3-6, wherein: The sealing knife of the upper head (210) is provided with a first tab groove, and the sealing knife of the lower head (310) is provided with a second tab groove (310A).

9. The battery top sealing device according to any one of claims 3-6, characterized in that: Both ends of the sealing knife of the upper head (210) are provided with first glue overflow grooves, and both ends of the sealing knife of the lower head (310) are provided with second glue overflow grooves (310B).

10. A battery top-sealing method, which uses the battery top-sealing device described in any one of the above claims 1-9, characterized in that, Comprising the following steps: S100: Energize the upper heating block (220) of the upper head mechanism (200) and the lower heating block (320) of the lower head mechanism (300); S200: Place the edge of the aluminum-plastic film of the battery (10) to be processed on the lower head mechanism (300); S300: The roller mechanism (400) rolls and presses the edge of the aluminum-plastic film; S400: The upper head mechanism (200) and the lower head mechanism (300) move towards each other to perform hot pressing on the edge of the aluminum-plastic film of the battery (10) to be processed; S500: The upper head mechanism (200) and the lower head mechanism (300) move away from each other to complete the battery top sealing process.

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