Film coating device and film coating method

Abstract

The present application provides a film coating device and a film coating method. The film coating device comprises a conveying mechanism, a film coating mechanism and a guide mechanism. The conveying mechanism is configured to convey a battery in a first direction; the film coating mechanism comprises a driving assembly, two supports arranged at an interval and two pressing members arranged in parallel, and the supports are connected to the driving assembly; and the film coating mechanism is mounted on the guide mechanism.

Description

Coating device and coating method Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a film coating device and a film coating method. Background Art

[0002] Currently, the coating device mainly uses a protective film to cover square lithium batteries. During the coating process, the coating device needs to rotate the battery multiple times to complete the coating of the battery's sides, top and bottom surfaces. SUMMARY OF THE INVENTION

[0003] The coating device needs to rotate the battery multiple times, and the coating device needs to stop conveying the battery during the rotation process, which greatly increases the time required for coating and reduces the production efficiency of the coating device.

[0004] Therefore, it is necessary to provide a coating device and a coating method to improve this defect.

[0005] The embodiments of the present application provide a coating device and a coating method, which can coat a battery without rotating the battery, thereby reducing the time required for coating and improving the production efficiency of the coating device.

[0006] To achieve this goal, this application adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a membrane encapsulation device, comprising:

[0008] The conveying mechanism is configured to convey the battery in a first direction, and before conveying the battery to the position of the wrapping mechanism, two large side surfaces of the battery are adhered with a protective film, and the protective film extends beyond the large side surfaces of the battery;

[0009] A film wrapping mechanism, comprising a drive assembly, two spaced-apart brackets, and two parallel pressing members, wherein the pressing members are rotatably mounted on the brackets, the brackets are connected to the drive assembly, and the drive assembly is configured to drive the pressing members to move closer to the battery and press the protective film extending beyond the large side surface of the battery against the top surface, bottom surface, or two small side surfaces of the battery; and

[0010] A guiding mechanism, wherein the wrapping mechanism is mounted on the guiding mechanism, and the guiding mechanism is configured to drive the wrapping mechanism to move close to the battery along a second direction before the battery is transported to the wrapping mechanism position, and to drive the wrapping mechanism to move in the same direction and synchronously with the battery when the battery is transported to the wrapping mechanism position, wherein the first direction is different from the second direction.

[0011] In a second aspect, an embodiment of the present application further provides a coating method, wherein the coating device as described above is used to coat a battery, and the coating method comprises:

[0012] The battery to be coated is placed on a conveying mechanism, with two large sides of the battery being adhered with protective films, and the protective films extending beyond the large sides of the battery;

[0013] The conveying mechanism conveys the battery along a first direction;

[0014] Before the battery is transported to the position of the wrapping mechanism, the guide mechanism drives the wrapping mechanism to move closer to the battery along a second direction, where the first direction is different from the second direction;

[0015] When the battery is transported to the position of the wrapping mechanism, the guide mechanism drives the wrapping mechanism to move in the same direction and synchronously with the battery. The driving component of the wrapping mechanism drives the pressing part to approach the battery and press the protective film that extends beyond the large side of the battery to the top surface, bottom surface or two small side surfaces of the battery. Beneficial effects

[0016] In the present application, the wrapping device includes a conveying mechanism, a wrapping mechanism and a guiding mechanism. The conveying mechanism is configured to convey the battery along a first direction. Before being conveyed to the position of the wrapping mechanism, the two large sides of the battery are adhered with a protective film, and the protective film exceeds the large sides of the battery. The wrapping mechanism is installed on the guiding mechanism. The wrapping mechanism includes a driving assembly, two spaced-apart brackets and two parallel pressing parts. The pressing parts are rotatably mounted on the brackets, and the brackets are connected to the driving assembly. Before the battery is conveyed to the position of the wrapping mechanism, the guiding mechanism is used to drive the wrapping mechanism to move close to the battery in a second direction. When the battery is conveyed to the position of the wrapping mechanism, the guiding mechanism is used to drive the wrapping mechanism to move in the same direction and synchronously with the battery. At the same time, the driving assembly is configured to drive the pressing parts to move close to the battery and press the protective film exceeding the large side of the battery to the top surface, bottom surface or two small side surfaces of the battery. The side, top surface and bottom surface of the battery can be wrapped without rotating the battery, thereby reducing the time required for wrapping and improving the production efficiency of the wrapping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a first coating device provided in an embodiment of the present application;

[0018] FIG2 is a schematic structural diagram of a second coating device provided in an embodiment of the present application;

[0019] FIG3 is a schematic flow chart of the coating method provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0020] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; 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 internal connection of two elements or the interaction relationship between two elements.

[0021] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meanings.

[0023] The embodiments of the present application provide a coating device and a coating method, which can coat a battery without rotating the battery, thereby reducing the time required for coating and improving the production efficiency of the coating device.

[0024] Please refer to Figure 1, which is a structural schematic diagram of a first film wrapping device provided in an embodiment of the present application. The film wrapping device 100 includes a conveying mechanism 1, a film wrapping mechanism 2 and a guiding mechanism 3.

[0025] The film coating device 100 further includes a carrier 110 , on which the conveying mechanism 1 , the film coating mechanism 2 and the guiding mechanism 3 are all mounted.

[0026] The conveying mechanism 1 is configured to convey the battery 4 along a first direction X. Before conveying the battery 4 to the film wrapping mechanism 2 , two large side surfaces of the battery 4 are covered with protective films 5 , which extend beyond the large side surfaces of the battery 4 .

[0027] It should be noted that battery 4 is a square lithium battery, consisting of four square side surfaces, a square top surface, and a square bottom surface. Two of the side surfaces that are relatively large and arranged opposite each other are considered the large side surfaces of battery 4, and the other two side surfaces that are relatively small and arranged opposite each other are considered the small side surfaces of battery 4. The surface of battery 4 connected to conveyor mechanism 1 is considered the bottom surface of battery 4, and the surface of battery 4 away from conveyor mechanism 1 is considered the top surface of battery 4. The bottom surface of battery 4 is connected to conveyor mechanism 1, and the portion of the bottom surface of battery 4 not blocked by conveyor mechanism 1, the small side surfaces of battery 4, and the top surface are all exposed to facilitate coating of battery 4 by coating mechanism 2.

[0028] The conveying mechanism 1 may include a drive assembly, a guide rail, and a moving member movably mounted on the guide rail. The moving member is connected to the drive assembly, and the bottom of the battery 4 is fixedly connected to the moving member. The guide rail may be an annular guide rail. When moving to the vicinity of the coating mechanism 2, the drive assembly may drive the moving member to move on the guide rail along the first direction X. The drive assembly may be composed of a motor and a crawler belt. The moving member may be composed of a guide block and a mounting fixture fixedly mounted on the guide block. The guide block is engaged with the crawler belt, and the battery 4 is placed on the mounting fixture.

[0029] In one embodiment, the film wrapping device further includes a cutting mechanism and a large side film laminating mechanism. The cutting mechanism is configured to cut the protective film strip into protective films that match the shape of the battery 4, and the large side film laminating mechanism is configured to laminarly adhere the cut protective film 5 to the large side of the battery 4. The structures of the cutting mechanism and the large side film laminating mechanism can refer to the film wrapping device of the related art and are not limited here.

[0030] The wrapping mechanism 2 includes a driving assembly, two spaced-apart brackets and two parallel pressing parts. The pressing parts are rotatably mounted on the brackets, and the brackets are connected to the driving assembly. The driving assembly is configured to drive the pressing parts to move close to the battery and press the protective film that extends beyond the large side of the battery to the top surface, bottom surface or two small side surfaces of the battery. In this way, the top surface, side surface and bottom surface of the battery can be wrapped without reversing the battery 4, thereby reducing the time required for wrapping and improving the production efficiency of the wrapping device.

[0031] The wrapping mechanism 2 is mounted on the guide mechanism 3. The guide mechanism 3 is configured to drive the wrapping mechanism 2 to move closer to the battery 4 along the second direction Y before the battery 4 is transported to the wrapping mechanism 2 position. When the battery 4 is transported to the wrapping mechanism 2 position, the wrapping mechanism 2 drives the wrapping mechanism 2 to move in the same direction and synchronously with the battery 4. During the process of moving in the same direction and synchronously with the battery 4, the wrapping mechanism 2 simultaneously presses the protective film that extends beyond the large side surface of the battery against the top surface, bottom surface, or two small side surfaces of the battery. Therefore, during the wrapping process, there is no need for the battery to stop or flip, etc., which can further improve the production efficiency of the wrapping device.

[0032] It should be noted that the first direction X is different from the second direction Y. The first direction X is the direction in which the conveying mechanism 1 conveys the battery 4. The second direction Y is set at an angle to the first direction X. The second direction Y is the direction in which the wrapping mechanism 2 moves before the battery 4 is conveyed to the position of the wrapping mechanism 2. During the process of conveying the battery 4 to the position of the wrapping mechanism 2, the wrapping mechanism 2 moves along the second direction Y and gradually approaches the battery 4 until the battery 4 is conveyed to the position of the wrapping mechanism 2.

[0033] In one embodiment, the first direction X is perpendicular to the second direction Y, that is, the angle between the first direction X and the second direction Y is 90 degrees.

[0034] In some embodiments, the wrapping mechanism 2 includes a top and bottom wrapping mechanism 21 and a small side wrapping mechanism 22. The wrapping device 100 includes a plurality of guide mechanisms 3. The top and bottom wrapping mechanism 21 and the small side wrapping mechanism 22 are respectively connected to the corresponding guide mechanisms 3. The top and bottom wrapping mechanism 21 includes a first drive assembly 211, two first brackets 212 spaced apart, and two first pressing members 213 arranged in parallel and overlapping in a third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. The first pressing members 213 are rotatably mounted on the first brackets 212. The first bracket 212 is connected to the first drive assembly 211, which is configured to drive the two first pressing members 213 to move in the same direction along the second direction Y and to press the protective film extending beyond the large side surface of the battery against the top and bottom surfaces of the battery.

[0035] The small side covering mechanism 22 includes a second driving component 221, two second brackets 222 arranged at intervals and two second pressing parts 223 arranged in parallel and at the same height. The second pressing parts 223 are rotatably mounted on the second bracket 222. The second driving component 221 is connected to the second bracket 222. The second driving component 221 is configured to drive the two second pressing parts 223 to move in the same direction along the second direction Y, and press the protective film that extends beyond the large side of the battery against the two small side surfaces of the battery.

[0036] In one embodiment, please refer to Figure 1, the first drive assembly 211 includes a first cylinder 2110, the piston of the first cylinder 2110 reciprocates along the second direction Y, the first bracket 212 is fixedly connected to the piston rod of the first cylinder 2110, and the first cylinder 2110 is mounted on the guide mechanism 3 through the first mounting bracket 216.

[0037] The first bracket 212 has a recess with protruding mounting shafts on both sides of the recess. The mounting shafts are an integral structure with the first bracket 212. The first pressing member 213 is a roller, and the central axis of the first pressing member 213 is parallel to the first direction X. The first pressing member 213 is a hollow structure with openings at both ends. Two mounting shafts are inserted from the openings at both ends of the first pressing member 213 to limit the first pressing member 213, and the first pressing member 213 can rotate around the mounting shafts. The two first brackets 212 are spaced apart along the third direction Z. A first connecting bracket 210 is provided between the two first brackets 212. The first bracket 212 and the first connecting bracket 210 can be fixedly connected by welding, threading, or bonding, or the first bracket 212 and the first connecting bracket 210 can be an integral structure. The first connecting bracket 210 and the piston rod of the first cylinder 2110 can be fixedly connected by threading. The distance between the two first brackets 212 is greater than or equal to the height of the battery 4 along the third direction Z.

[0038] When the battery moves to the position of the top and bottom covering film mechanism 21, the top and bottom covering film mechanism 21, driven by the guide mechanism 3, moves synchronously with the battery 4 in the first direction X. During the synchronous movement of the top and bottom covering film mechanism 21 and the battery 4 in the first direction X, the first cylinder 2110 drives the two first pressing members 213 to move toward the battery 4 in the second direction Y. The upper first pressing member 213 bends the portion of the protective film 5 that extends beyond the upper end of the large side surface of the battery 4 and presses it tightly against the top surface of the battery 4. The lower first pressing member 213 bends the portion of the protective film 5 that extends beyond the lower end of the large side surface of the battery 4 and presses it tightly against the bottom surface of the battery 4.

[0039] In some embodiments, the wrapping mechanism 2 includes at least two top and bottom wrapping mechanisms 21 , and the at least two top and bottom wrapping mechanisms 21 are symmetrically arranged on opposite sides of the battery 4 .

[0040] In one embodiment, referring to FIG1 , the film wrapping mechanism 2 includes two top and bottom film wrapping mechanisms 21 symmetrically disposed on opposite sides of the battery 4. A protective film extending beyond the two large side surfaces of the battery 4 is applied thereto, and the two top and bottom film wrapping mechanisms 21 are respectively configured to press the protective film on one corresponding large side surface against the top and bottom surfaces of the battery.

[0041] In some other embodiments, the number of top and bottom wrapping mechanisms 21 in the wrapping mechanism 2 is not limited to 2 in the above embodiments, but can also be 4, 6 or 8, etc. Multiple top and bottom wrapping mechanisms 21 can be symmetrically arranged on opposite sides of the battery, so that the top and bottom surfaces of multiple batteries can be wrapped at the same time.

[0042] In one embodiment, please refer to Figure 1, the second drive assembly 221 includes a second cylinder 2210, the piston of the second cylinder 2210 reciprocates along the second direction Y, the second bracket 222 is fixedly connected to the piston rod of the second cylinder 2210, and the second cylinder 2210 is mounted on the guide mechanism 3 through the second mounting bracket 226.

[0043] The second bracket 222 has a recess with protruding mounting shafts on both sides of the recess. The mounting shafts and the second bracket 222 are an integral structure. The second pressing member 223 is a roller, and the central axis of the second pressing member 223 is parallel to the third direction Z. The second pressing member 223 is a hollow structure with openings at both ends. Two mounting shafts are inserted through the openings at both ends of the second pressing member 223 to limit the second pressing member 223, and the second pressing member 223 can rotate around the mounting shafts. The two second brackets 222 are spaced apart along the first direction X. A second connecting bracket 220 is provided between the two second brackets 222. The second bracket 222 and the second connecting bracket 220 can be fixedly connected by welding, threading, or bonding, or the second bracket 222 and the second connecting bracket 220 can be an integral structure. The second connecting bracket 220 and the piston rod of the second cylinder 2210 can be fixedly connected by threading. The distance between the two second brackets 222 is greater than or equal to the length of the battery 4 along the first direction X.

[0044] When the battery moves to the position of the small side film covering mechanism 22, the small side film covering mechanism 22, driven by the guide mechanism 3, moves synchronously with the battery 4 in the same direction as the first direction X. During the synchronous movement of the small side film covering mechanism 22 and the battery 4 in the first direction X, the second cylinder 2210 drives the two second pressing members 223 to move toward the battery 4 in the second direction Y. The second pressing member 223 on the left side bends the portion of the protective film 5 that extends beyond the left side of the large side of the battery 4 and presses it tightly against the small side of the left side of the battery 4. The second pressing member 223 on the right side bends the portion of the protective film 5 that extends beyond the right side of the large side of the battery 4 and presses it tightly against the small side of the right side of the battery 4.

[0045] In some embodiments, the wrapping mechanism 2 includes at least two small side wrapping mechanisms 22 , and the at least two small side wrapping mechanisms 22 are symmetrically arranged on opposite sides of the battery 4 .

[0046] In one embodiment, referring to FIG1 , the film wrapping mechanism 2 includes two small side film wrapping mechanisms 22 symmetrically disposed on opposite sides of the battery 4. A protective film extending beyond the two large side surfaces of the battery 4 is applied thereto, and the two small side film wrapping mechanisms 22 are each configured to press the protective film on a corresponding large side surface against the top and bottom surfaces of the battery.

[0047] In some other embodiments, the number of small side wrapping mechanisms 22 in the wrapping mechanism 2 is not limited to 2 in the above embodiments, but can also be 4, 6 or 8, etc. Multiple small side wrapping mechanisms 22 can be symmetrically arranged on opposite sides of the battery, so that the top and bottom surfaces of multiple batteries can be wrapped at the same time.

[0048] In some embodiments, the wrapping mechanism 2 includes a top and bottom wrapping mechanism 21 and a small side wrapping mechanism 22. The wrapping device 100 includes a plurality of guide mechanisms 3. The top and bottom wrapping mechanism 21 and the small side wrapping mechanism 22 are respectively connected to the corresponding guide mechanisms 3. The top and bottom wrapping mechanism 21 includes a first drive assembly 211, two first brackets 212 spaced apart, and two first pressing members 213 arranged in parallel and overlapping in a third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. The first pressing members 213 are rotatably mounted on the first brackets 212. The first bracket 212 is connected to the first drive assembly 211, which is configured to drive the two first pressing members 213 to move toward each other along the third direction Z and press the protective film that extends beyond the large side surface of the battery against the top and bottom surfaces of the battery.

[0049] The small side covering mechanism 22 includes a second driving component 221, two second brackets 222 arranged at intervals, and two second pressing parts 223 arranged in parallel and at the same height. The second pressing parts 223 are rotatably mounted on the second bracket 222. The second driving component 221 is connected to the second bracket 222. The second driving component 221 is configured to drive the two second pressing parts 223 to move toward each other along the first direction X, and press the protective film that extends beyond the large side of the battery against the two small side surfaces of the battery.

[0050] In one embodiment, please refer to Figure 2, which is a structural schematic diagram of the second coating device provided in the embodiment of the present application. Its structure is roughly the same as the structure of the first coating device shown in Figure 1, with the difference that: the first drive component 211 includes a first motor 2111, a first transmission shaft 2112 and a first transmission component 2113, the first transmission shaft 2112 is connected to the first motor 2111 and the first transmission component 2113 respectively, the first bracket 212 is connected to the first transmission component 2113, and the first transmission component 2113 is configured to convert the rotation of the first transmission shaft 2112 into a linear motion of the first pressure covering part 213 along the third direction Z.

[0051] The first transmission assembly 2113 includes a first driving gear 21131 and two first racks 21132. The first driving gear 21131 is sleeved on the first transmission shaft 2112. The two first racks 21132 are respectively arranged on the left and right sides of the first driving gear 21131 and mesh with the first driving gear 21131. The first bracket 212 and the first racks 21132 can be fixedly connected by welding, bonding, etc., or the first bracket 212 and the first racks 21132 can also be an integral structure.

[0052] In one embodiment, the top and bottom coating mechanism 21 also includes a first driven gear 214 and a first mounting plate 215. The first driven gear 214 is rotatably mounted on the first mounting plate 215. The first driven gear 214 and the first driving gear 21131 are spaced apart along the third direction Z, and the first rack 21132 is engaged with the first driven gear 214.

[0053] The top and bottom film coating mechanism 21 includes two first driven gears 214, which are respectively arranged on the upper and lower sides of the first driving gear 21131. A fixed shaft is provided on the first mounting plate 215. The first driven gears 214 are sleeved on the fixed shaft and can rotate relative to the fixed shaft. The first transmission shaft 2112 passes through the first mounting plate 215, and the first mounting plate 215 can be fixedly connected to the first motor 2111 via a threaded connection. By arranging the first driven gears 214 on the upper and lower sides of the first driving gear 21131, the movement path of the first rack 21132 along the third direction Z can be extended, and the movement of the first rack 21132 can be made smoother.

[0054] When the battery moves to the position of the top and bottom film covering mechanism 21, the top and bottom film covering mechanism 21, driven by the guide mechanism 3, moves synchronously with the battery 4 in the first direction X. During the synchronous movement of the top and bottom film covering mechanism 21 and the battery 4 in the first direction X, the first motor 2111 drives the first driving gear 21131 to rotate via the first transmission shaft 2112. Under the action of the meshing force, the two first racks 21132 move respectively in the third direction Z and in a direction opposite to the third direction Z, driving the two first pressing members 213 to move toward each other in the third direction Z, and respectively pressing the protective film extending beyond the upper and lower ends of the large side surface of the battery 4 against the top and bottom surfaces of the battery.

[0055] In one embodiment, referring to FIG2 , the film wrapping mechanism 2 includes two top and bottom film wrapping mechanisms 21 symmetrically disposed on opposite sides of the battery 4. A protective film extending beyond the two large side surfaces of the battery 4 is applied thereto, and the two top and bottom film wrapping mechanisms 21 are respectively configured to press the protective film on one corresponding large side surface against the top and bottom surfaces of the battery.

[0056] In some other embodiments, the number of top and bottom wrapping mechanisms 21 in the wrapping mechanism 2 is not limited to 2 in the above embodiments, but can also be 4, 6 or 8, etc. Multiple top and bottom wrapping mechanisms 21 can be symmetrically arranged on opposite sides of the battery, so that the top and bottom surfaces of multiple batteries can be wrapped at the same time.

[0057] The second drive assembly 221 includes a second motor 2211, a second transmission shaft 2212 and a second transmission assembly 2213. The second transmission shaft 2212 is respectively connected to the second motor 2211 and the second transmission assembly 2213. The second bracket 222 is connected to the second transmission assembly 2213. The second transmission assembly 2213 is configured to convert the rotation of the second transmission shaft 2212 into a linear motion of the second pressure covering part 223 along the first direction X.

[0058] The second transmission assembly 2213 includes a second driving gear 22131 and two second racks 22132. The second driving gear 22131 is sleeved on the second transmission shaft 2212. The two second racks 22132 are respectively arranged on the upper and lower sides of the second driving gear 22131 and mesh with the second driving gear 22131. The second bracket 222 and the second racks 22132 can be fixedly connected by welding, bonding, etc., and the second bracket 222 and the second racks 22132 can also be an integrated structure.

[0059] In one embodiment, the small side film covering mechanism 22 also includes a second driven gear 224 and a second mounting plate 225. The second driven gear 224 is rotatably mounted on the second mounting plate 225. The second driven gear 224 and the second driving gear 22131 are spaced apart and arranged at the same height along the first direction X, and the second rack 22132 is engaged with the second driven gear 224.

[0060] The small side film-wrapping mechanism 22 includes two second driven gears 224, which are respectively arranged on the upper and lower sides of the second driving gear 22131. A fixed shaft is provided on the second mounting plate 225. The second driven gears 224 are sleeved on the fixed shaft and can rotate relative to the fixed shaft. The second transmission shaft 2212 passes through the second mounting plate 225, and the second mounting plate 225 can be fixedly connected to the second motor 2211 via a threaded connection. By providing the second driven gears 224 on the upper and lower sides of the second driving gear 22131, the movement path of the second rack 22132 along the third direction Z can be extended, and the movement of the second rack 22132 can be made smoother.

[0061] When the battery moves to the position of the small side wrapping mechanism 22, the small side wrapping mechanism 22, driven by the guide mechanism 3, moves synchronously with the battery 4 in the first direction X. During the synchronous movement of the small side wrapping mechanism 22 and the battery 4 in the first direction X, the second motor 2211 drives the second driving gear 22131 to rotate via the second transmission shaft 2212. Under the action of the meshing force, the two second racks 22132 move in the first direction X and in a direction opposite to the first direction X, respectively, and drive the two second pressing members 223 to move toward each other in the first direction X, respectively pressing the protective film extending beyond the left and right sides of the large side of the battery 4 against the two small side surfaces of the battery.

[0062] In one embodiment, referring to FIG2 , the film wrapping mechanism 2 includes two small side film wrapping mechanisms 22 symmetrically disposed on opposite sides of the battery 4. A protective film extending beyond the two large side surfaces of the battery 4 is applied thereto, and the two small side film wrapping mechanisms 22 are each configured to press the protective film on a corresponding large side surface against the two small side surfaces of the battery.

[0063] In some other embodiments, the number of small side wrapping mechanisms 22 in the wrapping mechanism 2 is not limited to 2 in the above embodiments, but can also be 4, 6 or 8, etc. Multiple small side wrapping mechanisms 22 can be symmetrically arranged on opposite sides of the battery, so that the top and bottom surfaces of multiple batteries can be wrapped at the same time.

[0064] In some embodiments, the guide mechanism 3 includes a moving member (not shown) and a supporting member 31. The moving member is movably mounted on the supporting member 31, and the film-wrapping mechanism 2 is mounted on the moving member. The supporting member 31 has a first section 311 and a second section 312. The first section 311 is connected to the second section 312. The first section 311 is parallel to the second direction Y, and the second section 312 is parallel to the first direction X.

[0065] In one embodiment, the guide member 31 is a guide rail, which is divided into a first section 311 and a second section 312. The movable member is a sliding block, which is slidably mounted on the guide rail and can slide between the first section 311 and the second section 312. The film wrapping mechanism 2 can be fixedly mounted on the movable member via a threaded connection. The guide member 3 may also include a driving member connected to the movable member 31 and configured to drive the movable member to move along the guide member 31 in the first direction X or the second direction Y.

[0066] In one embodiment, referring to Figures 1 and 2, the wrapping device 100 includes four guide mechanisms, which are respectively connected to the corresponding top and bottom wrapping mechanisms 21 or the small side wrapping mechanisms 22, and are configured to drive the corresponding top and bottom wrapping mechanisms 21 or the small side wrapping mechanisms 22 to move along the first direction X or the second direction Y.

[0067] In some embodiments, the film coating device 100 may further include a gripping mechanism configured to adhere the top insulating sheet to the top surface of the battery 4. The gripping mechanism may be, but is not limited to, a robot.

[0068] According to the coating device provided in the above embodiments of the present application, an embodiment of the present application further provides a coating method, which uses the coating device provided in any of the above embodiments to coat the battery. As shown in Figures 1 to 3, Figure 3 is a schematic flow chart of the coating method provided in the embodiment of the present application, and the coating method includes:

[0069] Step S1: placing the battery 4 to be coated on the conveying mechanism 1, with the two large sides of the battery 4 being adhered with the protective film 5, with the protective film 5 extending beyond the large sides of the battery 4;

[0070] Step S2: the conveying mechanism 1 conveys the battery 4 along the first direction X;

[0071] Step S3: Before the battery 4 is transported to the position of the coating mechanism 2, the guide mechanism 3 drives the coating mechanism 2 to move closer to the battery 4 along the second direction Y, where the first direction X and the second direction Y are different;

[0072] Step S4: When the battery 4 is transported to the position of the wrapping mechanism 2, the guide mechanism 3 drives the wrapping mechanism 2 to move in the same direction and synchronously with the battery 4. The driving component of the wrapping mechanism 2 drives the pressing part to approach the battery 4 and press the protective film that extends beyond the large side of the battery 4 to the top surface, bottom surface or two small side surfaces of the battery.

[0073] In one embodiment, before the battery 4 is transported to the position of the wrapping mechanism 2, the wrapping method further includes: cutting the protective film strip into protective films 5 that match the size of the battery 4, and attaching the protective films 5 to the two large side surfaces of the battery 4.

[0074] In one embodiment, step S4 includes: transporting the battery 4 to the top and bottom film wrapping mechanism 21, the guide component 3 drives the top and bottom film wrapping mechanism 21 and the battery 4 to move in the same direction and synchronously along the first direction X, the first driving component 211 of the top and bottom film wrapping mechanism 21 drives the first pressing part 213 to move toward the battery 4 and press the protective film 5 on the upper and lower ends of the large side surface of the battery 4 tightly against the top and bottom surfaces of the battery 4; transporting the battery 4 to the small side film wrapping mechanism 22, the guide component 3 drives the small side film wrapping mechanism 22 and the battery 4 to move in the same direction and synchronously along the first direction X, the second driving component 221 of the small side film wrapping mechanism 22 drives the second pressing part 223 to move toward the battery 4 and press the protective film 5 on the left and right sides of the large side surface of the battery 4 tightly against the two small side surfaces of the battery 4.

[0075] In one embodiment, the encapsulation method further includes: step S5: using a gripping assembly to adhere the top insulating sheet to the top surface of the battery 4. After completing step S5, the battery 4 can flow into the next process.

[0076] In the present application, the wrapping device includes a conveying mechanism, a wrapping mechanism and a guiding mechanism. The conveying mechanism is configured to convey the battery along a first direction. Before being conveyed to the position of the wrapping mechanism, the two large sides of the battery are adhered with a protective film, and the protective film exceeds the large sides of the battery. The wrapping mechanism is installed on the guiding mechanism. The wrapping mechanism includes a driving assembly, two spaced-apart brackets and two parallel pressing parts. The pressing parts are rotatably mounted on the brackets, and the brackets are connected to the driving assembly. Before the battery is conveyed to the position of the wrapping mechanism, the guiding mechanism is used to drive the wrapping mechanism to move close to the battery in a second direction. When the battery is conveyed to the position of the wrapping mechanism, the guiding mechanism is used to drive the wrapping mechanism to move in the same direction and synchronously with the battery. At the same time, the driving assembly is configured to drive the pressing parts to move close to the battery and press the protective film exceeding the large side of the battery to the top surface, bottom surface or two small side surfaces of the battery. The side, top surface and bottom surface of the battery can be wrapped without rotating the battery, thereby reducing the time required for wrapping and improving the production efficiency of the wrapping device.

Claims

1. A coating device, comprising: The conveying mechanism is configured to convey the battery along a first direction, and before conveying to the position of the coating mechanism, two large sides of the battery are attached with protective films, and the protective films extend beyond the large sides of the battery; The film-wrapping mechanism comprises a driving assembly, two spaced-apart brackets and two parallel-arranged pressing members, wherein the pressing members are rotatably mounted on the brackets, the brackets are connected to the driving assembly, and the driving assembly is configured to drive the pressing members to move close to the battery and press the protective film that exceeds the large side surface of the battery against the top surface, the bottom surface or the two small side surfaces of the battery; as well as A guiding mechanism, wherein the wrapping mechanism is installed on the guiding mechanism, and the guiding mechanism is configured to drive the wrapping mechanism to move close to the battery along a second direction before the battery is transported to the position of the wrapping mechanism, and to drive the wrapping mechanism to move in the same direction and synchronously with the battery when the battery is transported to the position of the wrapping mechanism, and the first direction is different from the second direction.

2. The coating device according to claim 1, wherein: The encapsulation mechanism comprises: A top and bottom coating mechanism, comprising a first driving assembly, two first brackets arranged at intervals, and two first pressing members arranged in parallel and overlapping in a third direction, wherein the third direction is perpendicular to the first direction and the second direction, the first pressing member is rotatably mounted on the first bracket, the first bracket is connected to the first driving assembly, and the first driving assembly is configured to drive the two first pressing members to move in the same direction along the second direction or move toward each other along the third direction, and to press the protective film that exceeds the large side surface of the battery against the top surface and the bottom surface of the battery; The small side film covering mechanism includes a second driving component, two second brackets arranged at intervals, and two second pressing parts arranged in parallel and at the same height. The second pressing parts are rotatably mounted on the second bracket. The second driving component is connected to the second bracket. The second driving component is configured to drive the two second pressing parts to move in the same direction along the second direction or move towards each other along the first direction, and to press the protective film extending beyond the large side of the battery against the two small side surfaces of the battery.

3. The coating device according to claim 2, wherein: The first driving assembly comprises a first cylinder, a piston of the first cylinder reciprocates along the second direction, and the first bracket is fixedly connected to the piston rod of the first cylinder; And / or, the second driving assembly includes a second cylinder, a piston of the second cylinder reciprocates along the second direction, and the second bracket is fixedly connected to the piston rod of the second cylinder.

4. The coating device according to claim 2, wherein: The first driving assembly includes a first motor, a first transmission shaft and a first transmission assembly, the first transmission shaft is connected to the first motor and the first transmission assembly respectively, the first bracket is connected to the first transmission assembly, and the first transmission assembly is configured to convert the rotation of the first transmission shaft into a linear motion of the first pressing member along the third direction; And / or, the second drive assembly includes a second motor, a second transmission shaft and a second transmission assembly, the second transmission shaft is respectively connected to the second motor and the second transmission assembly, the second bracket is connected to the second transmission assembly, and the second transmission assembly is configured to convert the rotation of the second transmission shaft into linear motion of the second pressure covering member along the first direction.

5. The coating device according to claim 4, wherein: The first transmission assembly includes a first driving gear and two first racks, the first driving gear is sleeved on the first transmission shaft, the two first racks are respectively arranged on the left and right sides of the first driving gear and mesh with the first driving gear, and the first bracket is fixedly connected to the first rack; The second transmission assembly includes a second driving gear and two second racks. The second driving gear is sleeved on the second transmission shaft. The two second racks are respectively arranged on the upper and lower sides of the second driving gear and mesh with the second driving gear. The second bracket is fixedly connected to the second racks.

6. The coating device according to claim 5, wherein: The top and bottom coating mechanism further comprises a first driven gear and a first mounting plate, wherein the first driven gear is rotatably mounted on the first mounting plate, the first driven gear and the first driving gear are spaced apart along the third direction, and the first rack is meshed with the first driven gear; The small side film covering mechanism also includes a second driven gear and a second mounting plate, the second driven gear is rotatably mounted on the second mounting plate, the second driven gear and the second driving gear are spaced apart and arranged at the same height along the first direction, and the second rack is meshed with the second driven gear.

7. The coating device according to claim 2, wherein: The coating mechanism includes at least two top and bottom coating mechanisms and / or at least two small side coating mechanisms. At least two top and bottom coating mechanisms are symmetrically arranged on opposite sides of the battery, and at least two small side coating mechanisms are symmetrically arranged on both sides of the battery.

8. The coating device according to any one of claims 1 to 7, wherein: The guiding mechanism comprises a moving part and a supporting and guiding part, the moving part is movably mounted on the supporting and guiding part, and the film-wrapping mechanism is mounted on the moving part; The guide member has a first section and a second section, the first section is connected to the second section, the first section is parallel to the second direction, and the second section is parallel to the first direction.

9. The coating device according to any one of claims 1 to 7, wherein: The first pressing member and the second pressing member are both rollers.

10. A coating method, using the coating device according to any one of claims 1 to 9 to coat a battery, the coating method comprising: Placing the battery to be coated on a conveying mechanism, wherein two large sides of the battery are attached with protective films, and the protective films extend beyond the large sides of the battery; The conveying mechanism conveys the battery along a first direction; Before the battery is transported to the position of the coating mechanism, the guide mechanism drives the coating mechanism to move along a second direction close to the battery, and the first direction is different from the second direction; When the battery is transported to the position of the wrapping mechanism, the guide mechanism drives the wrapping mechanism to move in the same direction and synchronously with the battery. The driving component of the wrapping mechanism drives the pressing part to approach the battery and press the protective film that exceeds the large side surface of the battery against the top surface, bottom surface or two small side surfaces of the battery.

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