Cover plate structure, cover plate processing method, battery and electric device

Abstract

The application relates to a cover plate structure, a cover plate processing method, a battery and an electric device. The cover plate structure comprises a top cover sheet, a length direction, a width direction and a thickness direction are defined based on the top cover sheet, characterized in that a riveting block is stacked in the thickness direction of the top cover sheet, a fixing part pointing to the riveting block in the thickness direction is formed on the surface of the top cover sheet facing the riveting block in the thickness direction, and the fixing part exerts a limiting force on the riveting block in the thickness direction pointing to the top cover sheet. The purpose of the application is to exert force on the edge position of the riveting block by the fixing part, smooth the riveting block, and thus ensure the performance of the battery such as the sealing property, stability and the like.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to cover plate structures, cover plate processing methods, batteries, and electrical devices. Background Technology

[0002] For battery cover plates using a single-rivet connection structure, after the riveting process between the terminal post and the cover plate is completed, obvious warping defects will appear in the riveted block area of ​​the non-riveted area on the cover plate. The reason is that the riveted block, as the connecting carrier between the terminal post and the cover plate, is fixed by only a single rivet. During the riveting process, the axial pressure and radial tension generated by the rivet on the riveted block cannot be evenly transmitted to the entire riveted block area, resulting in a severe imbalance in stress distribution.

[0003] This warping phenomenon exhibits significant spatial differences: areas near the rivet points are directly affected by the rivet tightening force, resulting in relatively slight warping, often manifesting as minor surface unevenness; while at the edges and corners of the rivet blocks away from the rivet points, the warping defect is particularly prominent, with a noticeable upward arching shape observed in some scenarios. In severe cases, even tiny gaps may appear between the rivet block and the cover plate substrate, affecting not only the flatness of the battery cover plate's appearance but also potentially impacting subsequent sealing performance and the stability of the terminal connection. Summary of the Invention

[0004] Therefore, it is necessary to provide a cover plate structure, cover plate processing method, battery and power supply device to address technical issues such as the lifting of the rivet block, so as to smooth the rivet block and ensure the battery's sealing, stability and other performance characteristics.

[0005] The technical solution adopted in this application is as follows: A first aspect of this application provides a cover plate structure, including a top cover sheet, the top cover sheet defining a length direction, a width direction, and a thickness direction. The top cover sheet is characterized in that a riveting block is stacked in the thickness direction, and a fixing part is formed on the surface of the top cover sheet facing the riveting block in the thickness direction, pointing towards the riveting block in the thickness direction; the fixing part applies a limiting force to the riveting block in the thickness direction pointing towards the top cover sheet.

[0006] In the above technical solution, the fixing part formed on the top cover plate is integrally fixedly connected to the top cover plate, providing reliable connection strength. The end of the fixing part facing away from the top cover plate is connected to the riveting block. In effect, the fixing part applies a limiting tensile force to the riveting block. The limiting force on the riveting block points from the riveting block towards the top cover plate itself; essentially, the top cover plate is pulling the riveting block towards itself. Compared to fixing methods that add additional fixing parts, this structure offers a higher degree of connection reliability.

[0007] As a further improvement to the above technical solution, in some embodiments, the fixing part includes: The fixing part body is connected to the top cover plate. The bent portion is located on the side opposite to the top cover plate in the thickness direction of the fixing part body. The bending portion applies a limiting force in the thickness direction to the rivet block, pointing towards the top cover plate.

[0008] In the above technical solution, the fixing part adopts an integrally bent fixing part body and a bent part. The function of the fixing part body is to connect, and the function of the bent part is to press it onto the rivet block and provide a limiting force to the rivet block.

[0009] In some embodiments, the rivet block has a step in the thickness direction formed at at least one end face in the length direction, and the bent portion extends toward the rivet block in the length direction of the top cover piece until the bent portion coincides with the stepped portion in the length direction of the top cover piece.

[0010] In the above technical solution, the required length of the fixing part is shortened, and the amount of pressing force applied to the bending part is reduced. In this solution, the fixing part is already a relatively small structure. For the fixing part, the smaller the size of the limiting component, i.e., the step of the rivet block, the easier it is to limit the movement. Compared to a design without a step, where the bending part is directly pressed onto the original thickness of the rivet block, the required length of the fixing part is longer, and the overall structure is more prone to deformation. Therefore, the step design is to improve the strength of the fixing part itself, thereby improving the reliability of the connection between the fixing part and the limiting rivet block.

[0011] In some embodiments, the step includes: The first step surface is parallel to the top cover plate in both length and width directions. The second step surface is perpendicular to the top cover plate in both length and width directions. The rivet block is covered with a first insulating element, which extends to the first step surface and the second step surface. The bent portion is pressed against the surface of the first insulating element on the first step surface.

[0012] In the above technical solution, the function of the first insulating component is to wrap the rivet block to prevent leakage between it and other components such as the fixing part. The bent part is pressed against the surface of the first insulating component, which serves two purposes: firstly, it provides insulation; secondly, in this solution, the bent part is bent after assembly, and during the bending process, the first insulating component reduces damage to the surface of the rivet block.

[0013] In some embodiments, a countersunk groove is formed on the surface of the top cover plate facing the riveting block in the thickness direction; the fixing part is located on the bottom wall of the countersunk groove. The bent portion presses and limits the riveting block in the sink.

[0014] In the above technical solution, the main function of the recess is to position and reduce the required design length of the fixing part. On the one hand, the recess is used to accommodate the rivet block and perform initial positioning of the rivet block, which facilitates subsequent bending of the bending part; on the other hand, after the rivet block is sunk and installed into the top cover plate, the height of the rivet block protruding from the recess is lower, and the required length of the fixing part is also shorter, further saving materials and improving strength.

[0015] In some embodiments, the bending portion includes: The extension section extends from the fixing body towards the riveting block. The force-applying section is located at the end of the extension section that is away from the main body of the fixing part in the length direction. The projection of the force-applying segment in the length and width directions falls at least partially within the projection range of the first step surface in the length and width directions. The dimension of the force-applying segment acting on the riveting block in the length direction is denoted as b, and the value of b is in the range of 0.5mm≤b≤2mm.

[0016] In the above technical solution, the section of the bent portion connected to the fixing body does not apply pressure to the rivet block; the end of the bent portion away from the fixing body, located directly above the rivet block and separated by the first insulating member, applies pressure to the rivet block. This section is denoted as 'b'. If 'b' is too small, the fixing effect is poor; if 'b' is too large, the design redundancy is excessive, and it occupies more space along the length of the cover plate, which does not conform to the space utilization concept of the design.

[0017] Furthermore, especially in this solution, the fixing part body is not completely attached to the side wall of the rivet block. Therefore, if the dimension b is too large, the fixing part body may also be prone to deformation during the bending stress process.

[0018] In some embodiments, the dimension of the fixing part body in the length direction is denoted as a, and the value of a ranges from 0.5mm to a ≤ 1.2mm.

[0019] In the above technical solution, if the size of 'a' is too small, the fixing effect is poor; if the size of 'a' is too large, it is inconvenient to bend, and the overall fixing part is not easy to stamp and extrude.

[0020] A second aspect of this application provides a battery including the aforementioned cover plate structure, wherein a housing is provided on the side of the top cover plate away from the rivet block in the thickness direction; the housing is open at least one end in the thickness direction.

[0021] In the above technical solution, the sealing performance of the battery is related to the cover plate. Improving the sealing performance and stability of the cover plate will also improve the sealing performance and stability of the battery.

[0022] A third aspect of this application provides an electrical device including an axle, on which a motor, a controller, and the aforementioned battery are mounted, the battery supplying power to the motor and the controller.

[0023] In the above technical solutions, the user experience of the electrical device is closely related to the battery. As battery performance improves, the performance of the electrical device also improves.

[0024] The fourth aspect of this application provides a method for processing a cover plate structure, wherein pre-stamping and extruding material is applied to the top cover plate to form the fixing part body; during the stamping process, a first groove and a second groove are pre-formed on two surfaces in the thickness direction of the top cover plate, which serve as stamping force points. The top cover plate and the riveting block are stacked and assembled, and the pole to be assembled is pressed and riveted to the riveting block. The fixing part body is bent at one end away from the top cover in the thickness direction, and the bending direction is towards the riveting block in the length direction to form the bending part; the force-applying section of the bending part is directly pressed against the surface of the first insulating part covered by the first step surface, and a limiting force in the thickness direction pointing towards the top cover is applied to the first step surface.

[0025] In the above technical solution, the fixing part no longer uses a separate fastener. Instead, the fixing part body, which is integrally formed on the top cover plate, is bent to form a bent part that applies force to the riveting block. After installation, it is not easy to loosen and has a higher degree of reliability.

[0026] In this design, the first and second grooves are the force points for clamping the top cover plate during the stamping process. At the same time, since the first groove and the recessed groove are located on opposite sides of the length of the fixing part, and there is a depth difference between the first groove and the recessed groove, the groove depths on both sides of the fixing part body are different. The side with the shallower groove provides greater support to the fixing part body. The difference in groove depth is to improve strength. The first groove is set to fit the fixing part body, which reduces the processing difficulty. Attached Figure Description

[0027] Figure 1 This is an assembly drawing of the cover plate structure for this application.

[0028] Figure 2 This is an assembly drawing of the cover plate structure from another perspective of this application.

[0029] Figure 3 This is an exploded view of the cover plate structure of this application.

[0030] Figure 4 This is an exploded view of the cover plate structure of this application from another perspective.

[0031] Figure 5This is a top view of the cover plate structure of this application.

[0032] Figure 6 for Figure 5 The AA sectional view is used to illustrate the connection structure of the fixing part.

[0033] Figure 7 for Figure 6 The enlarged view of section B is used to demonstrate the connection structure of the fixing part.

[0034] Figure 8 for Figure 7 A magnified view of a portion is provided to illustrate the structure of the fixing part.

[0035] Figure 9 This is an exploded view of the casing and cover plate of this application.

[0036] Figure 10 This is an exploded view of the battery in this application.

[0037] Figure 11 This is a simplified structural diagram of the electrical device described in this application.

[0038] Figure label: 1. Riveting block; 101. First through hole; 102. Step; 1021. First step surface; 1022. Second step surface; 2. Top cover plate; 201. Recessed groove; 202. First groove; 203. Second groove; 204. Third through hole; 3. Fixing part; 301. Fixing part body; 302. Bending part; 303. Gap; 3021, Extension section; 3022, Force application section; 4. First insulating component; 401. Second through hole; 5. Second insulating component; 501. Fourth through hole; 6. Pole post; 7. Seals; 8. Shell; 9. Axles; 10. Motor; 11. Controller; 12. Battery; 13. Outer shell; 131. First shell; 132. Second shell; 14. Battery cell; 15. Wheels. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where 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 number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] Example 1: like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a cover plate structure, which, according to the thickness direction in the figure, consists of the following components from top to bottom: a riveting block 1, a first insulating component 4, a top cover plate 2, and a second insulating component 5. A pole post 6 penetrates the riveting block 1, the first insulating component 4, the top cover plate 2, and the second insulating component 5. The pole post 6 and the fixing part 3 limit the movement of the cover plate structure at two locations along its length.

[0046] Reference Figure 3 , Figure 4 The pole post 6 is equipped with a sealing element 7. To accommodate the pole post 6 and the sealing element 7, a first through hole 101 is formed in the riveting block 1, a second through hole 401 is formed in the first insulating member 4, a third through hole 204 is formed in the top cover plate 2, and a fourth through hole 501 is formed in the second insulating member 5. The pole post 6 passes through the first through hole 101, the second through hole 401, the third through hole 204, and the fourth through hole 501, and the sealing element 7 is fitted onto the pole post 6 to improve sealing. The assembly of the pole post 6 is prior art and is not an improvement of this application. It will not be described further here.

[0047] like Figure 3As shown, in this embodiment, the fixing part 3 is a component with a hook shape at the top, extending from the top cover plate 2. The hook shape presses down on the rivet block 1, clamping it tightly onto the top cover plate 2. The fixing part 3 is located at one end of the elongated rivet block 1; the connecting position of the pole post 6 is close to the other end of the rivet block 1. Therefore, it is equivalent to having both the riveting limiting force of the pole post 6 and the pressing limiting force of the fixing part 3 at both ends of the elongated rivet block 1. This effectively prevents the rivet block 1 from lifting.

[0048] For the specific location and structure of the fixing part 3, please refer to Figure 5 , Figure 6 , Figure 7 .

[0049] like Figure 5 and Figure 6 As shown, a groove 201 is formed on the surface of the top cover plate 2 facing the riveting block 1 in the thickness direction. A fixing part 3 is formed at one end of the groove 201.

[0050] like Figure 7 As shown, the fixing part 3 includes a fixing part body 301 and a bending part 302. The fixing part body 301 is disposed perpendicular to the bottom of the groove 201 and has a gap 303 between it and the riveting block 1. The fixing part 3 extends toward the groove opening until it exceeds the groove opening. The fixing part body 301 extends out of the groove opening of the groove 201 and bends toward the riveting block 1. A step 102 is formed on the end face of the riveting block 1 near the fixing part body 301. For ease of reading the drawing, the two step surfaces 102 of the step 102 are named the first step surface 1021 and the second step surface 1022, respectively. The first step surface 1021 is parallel to the top cover plate 2, and the second step surface 1022 is perpendicular to the top cover plate 2.

[0051] The surface of the rivet block 1 is also partially covered by a first insulating member 4. The first insulating member 4 is in the shape of an open container, leaving only the surface of the rivet block 1 facing away from the top cover plate 2 in the thickness direction. As an optional embodiment, the covering dimension of the first insulating member 4 in the thickness direction can be smaller than the dimension in the thickness direction of the rivet block 1; however, the first insulating member 4 needs to completely cover the first stepped surface 1021 of the rivet block 1.

[0052] The bent portion 302 is directly pressed onto the first insulating member 4, and a force pointing towards the top cover plate 2 is applied to the first stepped surface 1021 through the first insulating member 4. Since the fixing portion 3 is extended from the top cover plate 2, the force actually applied by the fixing portion 3 to the riveting block 1 is the tension applied by the top cover plate 2 to the riveting block 1.

[0053] Example 2: Reference Figure 2 , Figure 3 , Figure 5In this embodiment, the top cover plate 2 is optimized by providing a first groove 202 and a second groove 203 on two surfaces in the thickness direction of the top cover plate 2. Specifically, according to the orientation in the figure, the groove on the upper surface of the top cover plate 2, i.e., the groove on the same side as the fixing part 3, is the first groove 202; the groove on the other side of the top cover plate 2 is the second groove 203.

[0054] The function of the first groove 202 and the second groove 203 is to facilitate the stamping equipment to clamp the top cover plate 2 during the stamping and forming of the fixing part 3, and to provide a point of force on the top cover plate 2.

[0055] The relative positions of the first groove 202 and the second groove 203 are as follows: Figure 7 As shown, the two are staggered. This staggered arrangement can effectively reduce the deformation damage to the top cover plate 2 caused by the two collinear and opposite forces during the stress process.

[0056] Example 3 The fixing part 3 is formed using a stamping and extrusion method. The forming steps of the fixing part 3 occur between the assembly steps of the cover plate structure. Specifically: Material is pre-stamped and extruded onto the top cover plate 2. The raw material at the first groove 202 and the recess 201 can be used as the raw material for the fixing part 3. The fixing part 3 semi-finished product is obtained by stamping and extrusion. At this time, the fixing part 3 semi-finished product is perpendicular to the top cover plate 2. During the stamping process, the first groove 202 and the second groove 203 pre-opened on the two surfaces of the top cover plate 2 in the thickness direction can be used as stamping force points. The second insulating component 5, the top cover plate 2, the first insulating component 4, and the riveting block 1 are stacked and assembled. At this time, the semi-finished fixed part 3 is close to the step 102 of the riveting block 1.

[0057] The fixing part body 301 is bent away from the top cover plate 2 in the thickness direction, and the bending direction is towards the riveting block 1 in the length direction to form a bent part 302; the force-applying section 3022 of the bent part 302 is directly pressed against the surface of the first insulating member 4 covered on the first step surface 1021, and a limiting force in the thickness direction pointing towards the top cover plate 2 is applied to the first step surface 1021.

[0058] The riveting action of the pole post 6 and the bending action of the bent portion 302 can theoretically be performed in any order. As an optional implementation, they can also be pressed down simultaneously. However, when pressing down simultaneously, considering the height difference in the thickness direction between the riveting point and the bending point, a corresponding fixture is required. Therefore, simultaneous riveting and bending are not the preferred solution in this embodiment, but rather an alternative solution.

[0059] Example 4: The dimension of the fixing part body 301 in the length direction is denoted as a, and the value of a is in the range of 0.5mm≤a≤1.2mm. The reason for choosing a dimension within this range is that if the dimension of a is too small, the fixing effect is poor; if the dimension of a is too large, it is inconvenient to bend, and the overall fixing part 3 is not easy to stamp and extrude.

[0060] Example 5: Due to the presence of the first insulating member 4, the bending portion 302 only applies force to the first step surface 1021 when it overlaps with it. This portion that can apply force perpendicularly to the first step surface 1021 is called the force-applying section 3022. The section between the force-applying section 3022 and the fixing body 301 is called the extension section 3021.

[0061] The force-applying segment 3022 presses against the assembly consisting of the first insulating component 4 and the riveting block 1 along its length, and is in direct contact with the first insulating component 4. Since the first insulating component 4 is wrapped around the riveting block 1, it also extends beyond the riveting block 1 by a certain dimension. This extension of the first insulating component 4 beyond the riveting block 1 occupies the extension length of the force-applying segment 3022. Therefore, the actual length of the force-applying segment 3022 acting on the riveting block 1 is less than the overall length of the force-applying segment 3022. The actual length of the force-applying segment 3022 acting on the riveting block 1 is denoted as b, and b is within the range of 0.5mm ≤ b ≤ 2mm. This range is chosen because: if b is too small, the fixing effect is poor; if b is too large, the design redundancy is excessive, occupying more space along the length of the cover plate, which does not conform to the space utilization concept of the design.

[0062] Furthermore, especially in this solution, the fixing part body 301 is not completely attached to the side wall of the rivet block 1. Therefore, if the size b is too large, the fixing part body 301 may also be prone to deformation during the bending stress process.

[0063] Example 6: like Figure 7 As shown, the step 102 of the riveting block 1 has a first step surface 1021 and a second step surface 1022 formed in the thickness direction. The dimension between the bottom surface of the step 102 and the first step surface 1021 in the thickness direction, i.e., the dimension of the first step surface 1021 in the thickness direction, is denoted as u. The design of the dimension u needs to take into account whether the fit with the fixing part 3 is reliable.

[0064] Example 7: like Figure 9 As shown, this embodiment provides a housing 8, which has at least one opening in the thickness direction, and the opening of the housing 8 is fitted with the cover plate structure mentioned in the previous embodiment.

[0065] Example 8: like Figure 10 As shown, this embodiment provides a battery 12, which is composed of the housing 8 in embodiment seven. The outer shell 13, composed of a first housing 131 and a second housing 132, is wrapped around the outside of the housing 8 to obtain a battery pack.

[0066] Example 9: like Figure 11 As shown, this embodiment provides an electrical device, such as a tram. A battery 12 (as described in Embodiment 8), along with a controller 11, a motor 10, and other components, are installed on the tram's axle 9. The battery 12 supplies power to the controller 11 and the motor 10, and the motor 10 drives the wheels 15 to rotate, thus propelling the vehicle.

[0067] This application improves the performance of the battery 12 and the electrical device by optimizing the sealing and flatness of the cover structure.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cover plate structure, comprising a top cover sheet, wherein the top cover sheet defines a length direction, a width direction, and a thickness direction. Its features are, The top cover sheet has rivet blocks stacked in the thickness direction. On the surface of the top cover sheet facing the rivet blocks in the thickness direction, a fixing part is formed pointing towards the rivet blocks in the thickness direction. The fixing part applies a limiting force to the rivet blocks pointing towards the top cover sheet in the thickness direction.

2. The cover plate structure as described in claim 1, characterized in that: The fixing part includes: The fixing part body is connected to the top cover plate. The bending portion is located on the side opposite to the top cover plate in the thickness direction of the fixing portion body, and the bending portion applies a limiting force in the thickness direction to the rivet block pointing towards the top cover plate.

3. The cover plate structure as described in claim 2, characterized in that: The rivet block has a step formed in the thickness direction at at least one end face in the length direction, and the bent portion extends toward the rivet block in the length direction of the top cover piece until the bent portion coincides with the stepped portion in the length direction of the top cover piece.

4. The cover plate structure as described in claim 3, characterized in that: The steps include: The first step surface is parallel to the top cover plate in both length and width directions. The second step surface is perpendicular to the top cover plate in both length and width directions. The rivet block is covered with a first insulating element, which extends to the first step surface and the second step surface. The bent portion is pressed against the surface of the first insulating element on the first step surface.

5. The cover plate structure as described in claim 2, characterized in that: The top cover plate has a countersunk groove on its thickness-direction surface facing the riveting block; the fixing part is located on the bottom wall of the countersunk groove. The bent portion presses and limits the riveting block in the sink.

6. The cover plate structure as described in claim 5, characterized in that: The bent portion includes: The extension section extends from the fixing body towards the riveting block. The force-applying section is located at the end of the extension section that is away from the main body of the fixing part in the length direction. The projection of the force-applying segment in the length and width directions falls at least partially within the projection range of the first step surface in the length and width directions. The dimension of the force-applying segment acting on the riveting block in the length direction is denoted as b, and the value of b is in the range of 0.5mm≤b≤2mm.

7. The cover plate structure as described in claim 2, characterized in that: The dimension of the fixed part body in the length direction is denoted as a, and the value of a ranges from 0.5mm to 1.2mm.

8. A battery having a cover plate structure as described in any one of claims 1-7, characterized in that: A housing is provided on the side of the top cover sheet opposite to the riveting block in the thickness direction; the housing is open at least one end in the thickness direction.

9. An electrical device comprising the battery as described in claim 8, characterized in that: The vehicle includes an axle, on which a motor, a controller, and a battery are mounted, with the battery supplying power to the motor and the controller.

10. A method for processing the cover plate structure according to any one of claims 1-7, characterized in that, Includes the following steps: The top cover plate is pre-stamped and extruded to form the fixing part body; during the stamping process, the first groove and the second groove pre-opened on two surfaces in the thickness direction of the top cover plate are the stamping force points. The top cover plate and the riveting block are stacked and assembled, and the pole to be assembled is pressed and riveted to the riveting block. The fixing part body is bent at one end away from the top cover in the thickness direction, and the bending direction is towards the riveting block in the length direction to form the bending part; the force-applying section of the bending part is directly pressed against the surface of the first insulating part covered by the first step surface, and a limiting force in the thickness direction pointing towards the top cover is applied to the first step surface.

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