Battery cell end portion adhesive pressing and flattening device and battery cell processing method
By combining the positioning component and the expansion component, the adhesive tape at the end of the battery cell is uniformly flattened, solving the problems of friction and waste, and improving the safety and processing efficiency of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- EVE POWER CO LTD
- Filing Date
- 2022-09-20
- Publication Date
- 2026-06-09
AI Technical Summary
Existing cell end adhesive tape flattening devices are prone to friction during the flattening process, resulting in metal shavings, which poses a short circuit risk and causes significant adhesive tape waste.
The device employs a positioning component and an expansion body component. The expansion body has shrinkage holes, and the expansion of the expansion body ensures that the adhesive paper adheres evenly and avoids friction. The pressure head controls the bending of the adhesive paper to ensure that the adhesive paper adheres evenly to the end face of the battery cell.
It improves battery safety, reduces adhesive tape waste, avoids metal shavings, and enhances battery processing quality and efficiency.
Smart Images
Figure CN115483426B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery processing equipment technology, and in particular to a battery cell end adhesive bonding and flattening device and a battery cell processing method. Background Technology
[0002] High-temperature insulating tape needs to be applied to both the positive and negative terminals of cylindrical battery cells to insulate the tabs from the casing. After the tape is applied around the perimeter by the tape-applying mechanism, a mechanical conforming wheel or an inner conical sleeve is typically used to press the tape internally, followed by a final flattening with a pressure head. This method of pressing and flattening the tape has the following drawbacks: friction occurs between the flattening mechanical parts and the surface of the conductive material or the tabs, generating metal shavings and posing a risk of short circuit. Summary of the Invention
[0003] The purpose of this invention is to provide a battery cell end-applying and flattening device and a battery cell processing method, which have a good flattening effect on the adhesive paper and produce high-quality batteries.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] In a first aspect, a device for flattening and applying adhesive to the end of a battery cell is provided, comprising:
[0006] A positioning component is used to place the battery cell body to be processed. A ring of adhesive tape is pasted around the periphery of the battery cell body. The adhesive surface of the adhesive tape has a first bonding layer and a second bonding layer. The first bonding layer is pasted to the periphery of the battery cell body, and the second bonding layer protrudes from the end face of one end of the battery cell body.
[0007] A flattening assembly includes an expansion body with a shrinkage hole. In its initial state, the end of the battery cell body is inserted into the shrinkage hole, and the end face of the battery cell body is located within the shrinkage hole. A limiting portion is provided on the outer periphery of the expansion body, and the limiting portion is fixed in position relative to the battery cell body. The limiting portion is used to restrict the expansion body from expanding toward the side away from the end face of the battery cell body. After the expansion body expands, the inner diameter of the shrinkage hole decreases, and the inner wall of the shrinkage hole squeezes the adhesive paper, so that the second bonding layer bends toward the center of the battery cell body and adheres to the end face of the battery cell body.
[0008] As a preferred embodiment of the battery cell end-adhesive flattening device, the positioning component includes a positioning block, on which a first positioning groove and a second positioning groove are provided. The second positioning groove is located at the bottom of the first positioning groove. The battery cell body passes through the second positioning groove. A portion of the expansion body is inserted into the first positioning groove. The limiting part includes a first limiting surface and a second limiting surface connected at an angle. The groove wall of the first positioning groove is the first limiting surface, and the groove bottom of the first positioning groove is the second limiting surface.
[0009] As a preferred embodiment of the battery cell end adhesive flattening device, the limiting part includes a rigid limiting cylinder, which is fixed to the outer periphery of the expansion body. The bottom of the limiting cylinder is provided with a processing hole, and the end of the battery cell body passes through the processing hole and is inserted into the limiting cylinder.
[0010] As a preferred embodiment of the cell end adhesive flattening device, the flattening assembly further includes a pressure head. The end of the cell body is located inside the shrinkage hole. The pressure head is disposed on the side of the expansion body away from the cell body. The pressure head is used to press against the expansion body to cause a portion of the inner wall of the expansion body to bend and squeeze the second bonding layer.
[0011] As a preferred embodiment of the battery cell end-applying and flattening device, the pressure head is slidably disposed on one side of the expansion body, and the pressure head can move along the axial direction of the battery cell body.
[0012] As a preferred embodiment of the battery cell end-adhesive flattening device, in the initial state, the wall of the shrinkage hole is an outwardly convex arc surface, and the highest point of the arc surface is directly opposite the position of the battery cell body.
[0013] As a preferred embodiment of the battery cell end-adhesive flattening device, the highest point of the arc surface is directly opposite the end face of the battery cell body.
[0014] As a preferred embodiment of the battery cell end-adhesive flattening device, the axis of the shrinkage hole coincides with the axis of the battery cell body.
[0015] As a preferred embodiment of the battery cell end-adhesive flattening device, the shape of the shrinkage hole is consistent with the cross-sectional shape of the battery cell body.
[0016] Secondly, a method for processing a battery cell is provided, comprising the above-mentioned device for applying adhesive and flattening the end of the battery cell, including the following steps:
[0017] Step 100: Insert the end of the battery cell body with the adhesive tape attached into the shrink hole of the expansion body;
[0018] Step 200: Inflate the expansion body, and bend a portion of the inner wall of the expansion body toward the center of the cell body to squeeze the second adhesive layer of the adhesive paper. The second adhesive layer bends toward the center of the cell body to adhere to the end face of the cell body.
[0019] As a preferred embodiment of the battery cell processing method, a pressure head is provided, wherein the pressure head is spaced apart from the expansion body, and step 200 specifically comprises:
[0020] Step 201: Inflate the expansion body, and bend a portion of the inner wall of the expansion body toward the center of the battery cell body and squeeze the second paper bonding layer, and bend the second bonding layer toward the center of the battery cell body.
[0021] Step 202: The pressure head moves toward the expansion body and presses against the expansion body, so that the wall of the shrinkage hole continuously bends and squeezes the second bonding layer, and the second bonding layer bends to fit against the end face of the battery cell body.
[0022] As a preferred embodiment of the battery cell processing method, when the expansion body expands, the wall of the shrinkage hole first contacts the periphery of the battery cell body or the first bonding layer, and then contacts the second bonding layer.
[0023] As a preferred embodiment of the battery cell processing method, the wall of the shrinkage hole is an outwardly convex arc surface, and step 100 specifically includes:
[0024] Insert the end of the battery cell body with the adhesive tape attached into the shrinkage hole of the expansion body, and align the highest point of the arc surface with the position of the battery cell body.
[0025] The beneficial effects of this invention are as follows: By setting a positioning component, the positioning component can position the battery cell body to be processed, avoiding positional displacement of the battery cell body during the application and flattening of adhesive on the end of the battery cell body; by setting an expansion body, during the expansion of the expansion body, the part of the expansion body that encounters an obstacle cannot continue to expand, and the expansion body will continue to expand towards the unobstructed area. As the expansion body continues to expand, the wall of the shrinkage hole will move closer to the center of the battery cell body, so that the inner wall of the expansion body can squeeze the adhesive paper during the expansion process, so that the adhesive paper bonding area gradually adheres to the end face of the battery cell body from the outside to the inside, making the adhesive paper shrink more evenly inward after bonding, which can prevent the folded area of the adhesive paper from protruding outside the periphery of the battery cell body; because the adhesive paper shrinks evenly inward, it is not necessary to use wider adhesive paper to compensate for the narrow area after flattening, reducing the waste of adhesive paper; the expansion body is flexible, and during the application of adhesive, the expansion body is not easy to rub against the battery cell body, so no metal shavings are generated during the application process, improving the safety performance of the battery. Attached Figure Description
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0027] Figure 1 This is a schematic diagram of the battery cell body and adhesive tape according to an embodiment of the present invention.
[0028] Figure 2 This is a schematic diagram of a battery cell end-applying and flattening device according to an embodiment of the present invention.
[0029] Figure 3 This is a schematic diagram of step 201 of the battery cell processing method according to an embodiment of the present invention.
[0030] Figure 4 This is a schematic diagram of step 202 of the battery cell processing method according to an embodiment of the present invention (arrows indicate the direction of movement).
[0031] Figure 5 This is a schematic diagram of the battery cell end adhesive flattening device according to another embodiment of the present invention.
[0032] In the picture:
[0033] 100. Battery cell body; 1001. Electrode tab; 200. Adhesive tape; 2001. First bonding layer; 2002. Second bonding layer;
[0034] 1. Positioning block; 101. First positioning groove; 102. First limiting surface; 103. Second limiting surface; 2. Expansion body; 201. Contraction hole; 3. Pressure head; 4. Limiting cylinder. Detailed Implementation
[0035] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0037] like Figures 1 to 3As shown, the present invention provides a battery cell end adhesive bonding and flattening device, including a positioning component and a flattening component. The positioning component is used to place the battery cell body 100 to be processed. (Refer to...) Figure 1 A ring of adhesive tape 200 is pasted around the periphery of the battery cell body 100. The adhesive tape 200 is a high-temperature insulating adhesive tape 200, used to insulate and protect the tabs 1001 on the battery cell body 100 from the casing. The adhesive surface of the adhesive tape 200 has a first bonding layer 2001 and a second bonding layer 2002. The first bonding layer 2001 is pasted to the periphery of the battery cell body 100, and the second bonding layer 2002 protrudes from the end face of one end of the battery cell body 100. The flattening assembly includes an expansion body 2, which has a shrinkage hole 201. When the expansion body 2 is in its initial state, the end of the cell body 100 can be inserted into the shrinkage hole 201, and the end face of the cell body 100 is located in the shrinkage hole 201. A limiting part is provided on the outer periphery of the expansion body 2. The limiting part is fixed in position relative to the cell body 100. The limiting part is used to restrict the expansion body 2 from expanding toward the side away from the end face of the cell body 100. After the expansion body 2 expands, the inner wall of the shrinkage hole 201 squeezes the adhesive paper 200 so that the second bonding layer 2002 bends toward the center of the cell body 100 and adheres to the end face of the cell body 100. By setting a positioning component, the battery cell body 100 to be processed can be positioned to prevent the position of the battery cell body 100 from shifting during the application of adhesive and flattening at the ends of the battery cell body 100. By setting an expansion body 2, it can be understood that during the expansion of the expansion body 2, the part of the expansion body 2 that encounters an obstacle cannot continue to expand, and the expansion body 2 will continue to expand to the unobstructed area. As the expansion body 2 continues to expand, the wall of the shrinkage hole 201 will move closer to the center of the battery cell body 100, so that the inner wall of the expansion body 2 can squeeze the adhesive paper 200 during the expansion process. The adhesive tape 200 gradually adheres to the end face of the battery cell body 100 from the outside in, making the tape shrink more evenly inward after adhesion. This prevents the folded area of the tape 200 from protruding beyond the periphery of the battery cell body 100. Because the tape 200 shrinks evenly inward, there is no need to use a wider tape 200 to compensate for the narrow area after flattening, reducing tape waste. The expansion body 2 is flexible, and it is not easy for the expansion body 2 to rub against the battery cell body 100 during the application process. Therefore, no metal shavings are generated during the application process, improving the safety performance of the battery.
[0038] In this embodiment, the cross-section of the battery cell body 100 is cylindrical, and the shape of the shrinkage hole 201 is consistent with the shape of the cross-section of the battery cell body 100, that is, the shape of the shrinkage hole 201 is also circular. By setting the shape of the shrinkage hole 201 to be consistent with the shape of the battery cell body 100, when the expansion body 201 expands, the hole walls in all directions of the shrinkage hole 201 are made to contact the adhesive paper 200 simultaneously as much as possible, thereby improving the adhesive application quality. In other embodiments, if the cross-section of the battery cell body 100 is elliptical, then the shape of the shrinkage hole 201 can also be set to elliptical.
[0039] In this embodiment, the inflator 2 is an air bladder, and the inflator 2 is annular. Inflating the inflator 2 causes it to expand, thus completing the adhesive application. To ensure the quality of the adhesive application, the width of the second bonding layer 2002 of the adhesive tape 200 should be greater than 1 mm.
[0040] Specifically, the axis of the shrinkage hole 201 coincides with the axis of the battery cell body 100, meaning the shrinkage hole 201 and the battery cell body 100 are concentrically arranged. It can be understood that when the expansion body 2 expands, the inner diameter of the shrinkage hole 201 shrinks uniformly. By aligning the axis of the shrinkage hole 201 with the axis of the battery cell body 100, the pressure exerted by the inner wall of the expansion body 2 on the adhesive tape 200 is uniform throughout the shrinkage process. This allows the second adhesive layer 2002 of the adhesive tape 200 to be uniformly adhered to the end of the battery cell body 100.
[0041] Reference Figure 4 In this embodiment, the flattening assembly also includes a pressure head 3. The shrinkage hole 201 is a through hole, and the end face of the battery cell body 100 is located inside the shrinkage hole 201. The pressure head 3 is disposed on the side of the expansion body 2 away from the battery cell body 100. The pressure head 3 is used to press against the expansion body 2, so that a portion of the inner wall of the expansion body 2 bends and squeezes the second bonding layer 2002. By setting the pressure head 3, the expansion space of the expansion body 2 can be limited, so that the pressure of the expansion body 2 can be applied to the second bonding layer 2002 of the adhesive paper 200 as much as possible. The pressure of the pressure head 3 is transmitted to the adhesive paper 200 through the expansion body 2. That is to say, the pressure head 3 does not directly contact the battery cell body 100, which can avoid friction with the battery cell body 100 to generate metal shavings.
[0042] Furthermore, the pressure head 3 is slidably disposed on one side of the expansion body 2, and the pressure head 3 can move along the axial direction of the cell body 100. By slidably disposing the pressure head 3 on one side of the expansion body 2, in the initial state, the pressure head 3 can be spaced apart from the expansion body 2. When the expansion body 2 expands to a certain extent, the inner wall of the expansion body 2 squeezes the second adhesive layer 2002 of the adhesive paper 200, causing the second adhesive layer 2002 to bend at a certain angle toward the end face of the cell body 100. At this time, the pressure head 3 is driven to move toward the expansion body 2, and the pressure head 3 can apply pressure to the adhesive paper 200 through the expansion body 2, so that the second adhesive layer 2002 of the adhesive paper 200 is pressed tightly against the end face of the cell body 100; this can be achieved by... The solution is that the expansion body 2 exerts pressure on the adhesive tape 200 by expanding. The larger the expansion body 2 is, the greater the bending angle of the second bonding layer 2002 of the adhesive tape 200. The second bonding layer 2002 can get closer to the end face of the battery cell body 100. The sliding setting of the pressure head 3 can change the shape of the expansion body 2 by squeezing, thereby changing the pressure between the expansion body 2 and the adhesive tape 200 and reducing the required expansion degree of the expansion body 2. When the expansion body 2 is an air bladder, the inflation time of the expansion body 2 can be shortened, which can speed up the processing efficiency of the battery cell body 100.
[0043] In one embodiment, the movement of the pressure head 3 can be driven by a cylinder.
[0044] Specifically, the positioning component includes a positioning block 1, on which a first positioning groove 101 and a second positioning groove are provided. The second positioning groove is located at the bottom of the first positioning groove 101. The battery cell body 100 passes through the second positioning groove. A portion of the expansion body 2 is inserted into the first positioning groove 101. The limiting part includes a first limiting surface 102 and a second limiting surface 103. The first limiting surface 102 and the second limiting surface 103 are connected at an angle. The groove wall of the first positioning groove 101 is the first limiting surface 102, and the groove bottom of the first positioning groove 101 is the second limiting surface 103. In this embodiment, the first limiting surface 102 restricts the expansion body 2 from expanding in a first direction, and the second limiting surface 103 restricts the expansion body 2 from expanding in a second direction. The first direction is the direction from the center of the battery cell body 100 to the edge, and the second direction is the direction from the end of the battery cell body 100 near the expansion body 2 to the end away from the expansion body 2. By inserting a portion of the expansion body 2 into the first positioning groove 101, the position between the battery cell body 100 and the positioning block 1 is determined once the battery cell body 100 and the positioning block 1 are positioned. This shortens the positioning time and improves processing efficiency. When the expansion body 2 expands, it will form a squeezing friction with the groove wall of the first positioning groove 101. The friction generated by the two can reduce the relative movement between them, prevent the expansion body 2, the battery cell body 100 and the positioning block 1 from shifting positions, and ensure the adhesive quality of the battery cell body 100.
[0045] Reference Figure 5 In another embodiment, the limiting part can be fixed to the expansion body 2. The limiting part includes a rigid limiting cylinder 4, which can be made of a rigid material (such as hard plastic). The limiting cylinder 4 is fixed to the outer periphery of the expansion body 2. The bottom of the limiting cylinder 4 is provided with a processing hole. The end of the battery cell body 100 passes through the processing hole and is inserted into the limiting cylinder 4. At this time, the inner wall and the bottom of the limiting cylinder 4 can limit the expansion direction of the expansion body 2. By directly fixing the limiting part to the expansion body 2, the mutual movement between the expansion body 2 and the limiting part can be prevented, thereby ensuring that the expansion body 2 can expand towards the end face of the battery cell body 100 to complete the adhesive application.
[0046] Furthermore, when the expander 2 expands, the wall of the shrinkage hole 201 first contacts the periphery of the cell body 100 or the first adhesive layer 2001. By setting the wall of the shrinkage hole 201 to contact the periphery of the cell body 100 or the first adhesive layer 2001 first when the expander 2 expands, when the wall of the shrinkage hole 201 contacts the second adhesive layer 2002 of the adhesive tape 200, there is no gap between the wall of the shrinkage hole 201 and the periphery of the cell body 100. At this time, the second adhesive layer 2002 can only bend towards the end of the cell body 100, preventing the second adhesive layer 2002 from protruding from the periphery of the cell body 100.
[0047] In this embodiment, in the initial state, the wall of the shrinkage hole 201 is a convex arc surface, and the highest point of the arc surface is directly opposite the position of the battery cell body 100. By setting the wall of the shrinkage hole 201 to be a convex arc surface, the contact area between the wall of the shrinkage hole 201 and the battery cell body 100 gradually increases during the expansion of the expansion body 2. This makes it easy to control that the wall of the shrinkage hole 201 is the first to contact the periphery of the battery cell body 100 or the first bonding layer 2001 during the expansion of the expansion body 2. By setting the wall of the shrinkage hole 201 to be a convex arc surface, the pressure of the expansion body 2 on the second bonding layer 2002 can be applied first at the junction of the second bonding layer 2002 and the first bonding layer 2001. At this time, the expansion of the expansion body 2 can wrap around and close the second bonding layer 2002, ensuring the quality of adhesive application.
[0048] Reference Figure 2 Furthermore, the highest point of the arc surface is directly opposite the end face of the battery cell body 100. By setting the highest point of the arc surface to be directly opposite the end face of the battery cell body 100, the wall of the shrinkage hole 201 of the expansion body 2 can wrap around and close the second bonding layer 2002 the moment the expansion body 2 comes into contact with the battery cell body 100, thus improving the processing efficiency of the battery cell body 100.
[0049] This embodiment only takes one end of the battery cell body 100 as an example for explanation. When both ends of the battery cell body 100 are provided with adhesive tape 200, the adhesive tape 200 at both ends of the battery cell body 100 can be applied by the battery cell end adhesive flattening device described above.
[0050] Reference Figures 2 to 4 This embodiment also provides a cell processing method, providing the cell end adhesive bonding and flattening device in any of the above embodiments, including the following steps:
[0051] Step 100: Insert the end of the battery cell body 100 with the adhesive tape 200 attached into the shrinkage hole 201 of the expansion body 2;
[0052] Step 200: Expand the expansion body 2. A portion of the inner wall of the expansion body 2 bends toward the center of the cell body 100 and squeezes the second adhesive layer 2002 of the adhesive paper 200. The second adhesive layer 2002 of the adhesive paper 200 bends toward the center of the cell body 100 until it adheres to the end face of the cell body 100.
[0053] By setting up an expansion body 2, the flexible expansion of the expansion body 2 is used to apply adhesive to the adhesive tape 200 at the end of the cell body 100, which can prevent the adhesive tape 200 from protruding from the periphery of the cell body 100, thereby avoiding friction between the processed cell body 100 and the battery casing and improving the quality of the battery.
[0054] Reference Figure 4 Specifically, the cell end adhesive flattening device includes a pressure head 3, and step 200 specifically involves:
[0055] Step 201: Expand the expansion body 2, and a portion of the inner wall of the expansion body 2 bends toward the center of the cell body 100 and squeezes the second adhesive layer 2002 of the adhesive paper 200, and the second adhesive layer 2002 bends toward the center of the cell body 100.
[0056] Step 202: The pressure head 3 moves toward the expansion body 2 and presses against the expansion body 2, so that the wall of the shrinkage hole 201 continues to bend and squeeze the second bonding layer 2002, and the second bonding layer 2002 bends to fit with the end face of the battery cell body 100.
[0057] By setting the pressure head 3 to compress the expansion body 2, initially, the pressure head 3 and the expansion body 2 are spaced apart. After the expansion body 2 expands to a certain extent, the wall of the contraction hole 201 compresses the second adhesive layer 2002 of the adhesive paper 200, causing the second adhesive layer 2002 to bend at a certain angle toward the end face of the cell body 100. At this time, the pressure head 3 is driven to move toward the expansion body 2, and the pressure head 3 can apply pressure to the adhesive paper 200 through the expansion body 2, so that the second adhesive layer 2002 of the adhesive paper 200 is pressed tightly and adhered to the end face of the cell body 100; this is understandable. Yes, the expansion body 2 exerts pressure on the adhesive tape 200 by expanding. The larger the expansion volume of the expansion body 2, the greater the bending angle of the second bonding layer 2002 of the adhesive tape 200. The second bonding layer 2002 can get closer to the end face of the battery cell body 100. The sliding setting of the pressure head 3 can change the shape of the expansion body 2 by squeezing, thereby changing the pressure between the expansion body 2 and the adhesive tape 200 and reducing the required expansion degree of the expansion body 2. When the expansion body 2 is an air bag, the inflation time of the expansion body 2 can be shortened, which can speed up the processing efficiency of the battery cell body 100.
[0058] Furthermore, when the expander 2 expands, the wall of the shrinkage hole 201 first contacts the periphery of the cell body 100 or the first adhesive layer 2001, and then contacts the second adhesive layer 2002 of the adhesive tape 200. By setting the wall of the shrinkage hole 201 to contact the periphery of the cell body 100 or the first adhesive layer 2001 first when the expander 2 expands, and when the wall of the shrinkage hole 201 contacts the second adhesive layer 2002 of the adhesive tape 200, there is no gap between the wall of the shrinkage hole 201 and the periphery of the cell body 100. At this time, the second adhesive layer 2002 can only bend towards the end of the cell body 100, preventing the second adhesive layer 2002 from protruding from the periphery of the cell body 100.
[0059] Specifically, the wall of the shrinkage hole 201 is a convex arc surface, and step 100 is as follows:
[0060] Insert the end of the battery cell body 100 with the adhesive tape 200 attached into the shrinkage hole 201 of the expansion body 2, and align the highest point of the arc surface with the position of the battery cell body 100.
[0061] By aligning the highest point of the arc surface with the position of the cell body 100, the contact area between the wall of the shrinkage hole 201 and the cell body 100 gradually increases during the expansion of the expansion body 2. This allows for easy control of the expansion body 2 during expansion, ensuring that the wall of the shrinkage hole 201 is the first to contact the periphery of the cell body 100 or the first bonding layer 2001. By setting the wall of the shrinkage hole 201 to be an outwardly convex arc surface, the pressure of the expansion body 2 on the second bonding layer 2002 can be applied first at the junction of the second bonding layer 2002 and the first bonding layer 2001. At this time, the expansion of the expansion body 2 can wrap around and close the second bonding layer 2002, ensuring the quality of the adhesive application.
[0062] After the adhesive is applied, the expansion body 2 is shrunk, for example, by deflating the airbag. At this time, the diameter of the shrinkage hole 201 becomes larger. Then, the battery cell body 100 with adhesive applied inside the positioning component can be removed and replaced with a battery cell body 100 to be processed for the next adhesive application operation.
[0063] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.
[0064] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0066] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.
Claims
1. A device for flattening and applying adhesive to the end of a battery cell, characterized in that, include: A positioning component is used to place the battery cell body to be processed. A ring of adhesive tape is pasted around the periphery of the battery cell body. The adhesive surface of the adhesive tape has a first bonding layer and a second bonding layer. The first bonding layer is pasted to the periphery of the battery cell body, and the second bonding layer protrudes from the end face of one end of the battery cell body. A flattening assembly includes an expansion body with a shrinkage hole. In its initial state, the end of the battery cell body is inserted into the shrinkage hole, and the end face of the battery cell body is located within the shrinkage hole. A limiting portion is provided on the outer periphery of the expansion body, and the limiting portion is fixed in position relative to the battery cell body. The limiting portion is used to restrict the expansion body from expanding toward the side away from the end face of the battery cell body. After the expansion body expands, the inner diameter of the shrinkage hole decreases, and the inner wall of the shrinkage hole squeezes the adhesive paper, so that the second bonding layer bends toward the center of the battery cell body and adheres to the end face of the battery cell body.
2. The battery cell end adhesive bonding and flattening device according to claim 1, characterized in that, The positioning component includes a positioning block, on which a first positioning groove and a second positioning groove are provided. The second positioning groove is located at the bottom of the first positioning groove. The battery cell body passes through the second positioning groove. A portion of the expansion body is inserted into the first positioning groove. The limiting part includes a first limiting surface and a second limiting surface connected at an angle. The groove wall of the first positioning groove is the first limiting surface, and the groove bottom of the first positioning groove is the second limiting surface.
3. The cell end adhesive bonding and flattening device according to claim 1, characterized in that, The limiting part includes a rigid limiting cylinder, which is fixed to the outer periphery of the expansion body. The bottom of the limiting cylinder is provided with a machining hole, and the end of the battery cell body passes through the machining hole and is inserted into the limiting cylinder.
4. The battery cell end adhesive bonding and flattening device according to claim 1, characterized in that, The flattening assembly also includes a pressure head, with the end of the battery cell body located inside the shrinkage hole. The pressure head is disposed on the side of the expansion body away from the battery cell body, and the pressure head is used to press against the expansion body to cause a portion of the inner wall of the expansion body to bend and squeeze the second bonding layer.
5. The cell end adhesive bonding and flattening device according to claim 4, characterized in that, The pressure head is slidably disposed on one side of the expansion body, and the pressure head can move along the axial direction of the battery cell body.
6. The battery cell end adhesive bonding and flattening device according to any one of claims 1-5, characterized in that, In the initial state, the wall of the shrinkage hole is an outwardly convex arc surface, and the highest point of the arc surface is directly opposite the position of the battery cell body.
7. The cell end adhesive bonding and flattening device according to claim 6, characterized in that, The highest point of the arc surface is directly opposite the end face of the battery cell body.
8. The cell end adhesive bonding and flattening device according to any one of claims 1-5, characterized in that, The axis of the shrinkage hole coincides with the axis of the battery cell body.
9. The cell end adhesive bonding and flattening device according to any one of claims 1-5, characterized in that, The shape of the shrinkage hole is consistent with the cross-sectional shape of the battery cell body.
10. A method for processing battery cells, characterized in that, A battery cell end adhesive bonding and flattening device as described in any one of claims 1-9 is provided, comprising the following steps: Step 100: Insert the end of the battery cell body with the adhesive tape attached into the shrink hole of the expansion body; Step 200: Inflate the expansion body, and bend a portion of the inner wall of the expansion body toward the center of the cell body to squeeze the second adhesive layer of the adhesive paper. The second adhesive layer bends toward the center of the cell body to adhere to the end face of the cell body.
11. The cell processing method according to claim 10, characterized in that, A pressure head is provided, which is spaced apart from the expansion body. Step 200 specifically includes: Step 201: Inflate the expansion body, and bend a portion of the inner wall of the expansion body toward the center of the battery cell body to compress the second bonding layer, and bend the second bonding layer toward the center of the battery cell body. Step 202: The pressure head moves toward the expansion body and presses against the expansion body, so that the wall of the shrinkage hole continuously bends and squeezes the second bonding layer, and the second bonding layer bends to fit against the end face of the battery cell body.
12. The cell processing method according to claim 10, characterized in that, When the expander expands, the wall of the shrinkage hole first contacts the periphery of the battery cell body or the first bonding layer, and then contacts the second bonding layer.
13. The cell processing method according to claim 12, characterized in that, The wall of the shrinkage hole is an outwardly convex arc surface, and step 100 specifically involves: Insert the end of the battery cell body with the adhesive tape attached into the shrinkage hole of the expansion body, and align the highest point of the arc surface with the position of the battery cell body.