Battery top cover assembling device

Abstract

The utility model discloses a battery top cover assembling device which is used for riveting and assembling a pole of a battery top cover, the battery top cover comprises a cover plate assembly with a pole mounting hole, a pole penetrating into the pole mounting hole from one side of the cover plate assembly, and upper plastic and a riveting block which are arranged on the other side of the cover plate assembly; the assembling device comprises a fixing jig, an upper module and a lower module, the battery top cover can be positioned in advance through a cover piece positioning groove in the fixing jig, the battery top cover can be conveniently placed in the cover piece positioning groove in the positioning jig, meanwhile, in the riveting process, the assembling efficiency is improved, and the assembling efficiency is improved. The force applying direction of the pressure applying part and the riveting piece towards the pole is perpendicular to the end face of the pole, so that the battery top cover only moves in the vertical direction in the riveting process, relative displacement cannot be generated in other directions, a produced product can reach the required symmetry degree and compression amount, and the optimal rate and efficiency in the riveting process are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery top cover assembly device. Background Technology

[0002] Hybrid electric vehicles and pure electric vehicles, as representatives of new energy vehicles, have gradually gained recognition from manufacturers and consumers. The power battery, as the main power source for new energy vehicles, has become one of the key components of electric vehicles. There are many parts on the battery, among which the battery cover is one of the more important structures.

[0003] In the prior art, the battery top cover typically includes a cover assembly, a positive terminal post, a negative terminal post, plastic on the positive terminal and plastic on the negative terminal, a positive terminal riveting block and a negative terminal riveting block.

[0004] The connection relationship is roughly as follows: Two terminal mounting holes are opened on the cover plate assembly. The positive terminal and the negative terminal are placed in the corresponding terminal mounting holes. The plastic on the positive terminal surrounds the terminal mounting hole of the positive terminal and isolates and connects the positive terminal and the cover plate assembly. The plastic on the negative terminal surrounds the terminal mounting hole of the negative terminal and isolates and connects the negative terminal and the cover plate assembly. The positive terminal riveting block is positioned and connected to the surface of the plastic on the positive terminal, and the negative terminal riveting block is positioned and connected to the surface of the plastic on the negative terminal.

[0005] Currently, the riveting methods for the positive and negative terminal riveting blocks on the battery top cover sometimes involve using a riveting machine or a hydraulic press. During use, pressure is applied to cause plastic deformation of the contact surfaces of the two components, creating a mechanical interlock. However, this method still has limitations in practical applications, as follows:

[0006] Because the (positive / negative) riveting block assembly is thin and the parts may bend during injection molding, and the fixing steps used for positioning on the cover assembly are small, when the (positive / negative) riveting block and (positive / negative) post are under pressure, the (positive / negative) riveting block assembly in the top cover is prone to relative displacement with the top cover. The reasons for this phenomenon are mostly uneven force, slight tilting when force is applied, or slight deviation between the (positive / negative) riveting block and the fixing steps of the top cover. After this phenomenon occurs, the (positive / negative) riveting block assembly is prone to skew during riveting, resulting in skewness failure. At the same time, the skew can cause damage to the upper riveting block assembly.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] This utility model provides a battery top cover assembly device, which aims to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a battery top cover assembly device for riveting and assembling the terminal posts of a battery top cover, wherein the battery top cover includes a cover plate assembly with terminal post mounting holes, a terminal post that passes through the terminal post mounting holes from one side of the cover plate assembly, and an upper plastic and a riveting block placed on the other side of the cover plate assembly.

[0010] The assembly device includes a fixed fixture, an upper module, and a lower module;

[0011] With the height direction of the assembly device as a reference, the upper module, the fixing fixture, and the lower module are arranged sequentially from top to bottom;

[0012] The fixing fixture is positioned and connected to the upper surface of the lower module. The upper module moves up and down relative to the lower module in a direction perpendicular to the upper surface of the lower module, thereby realizing the mold closing state and the mold opening state.

[0013] The upper surface of the fixing fixture is provided with a cover plate positioning groove, which is configured to position and accommodate the battery top cover; the lower surface of the fixing fixture is provided with a deep hole at a position corresponding to the end of the electrode post, the deep hole is connected to the cover plate positioning groove, and the deep hole is coaxially arranged with the electrode post.

[0014] The lower module is provided with a riveting member, the end of which faces the deep hole and the two are coaxially arranged. In the mold closed state, the end of the riveting member is configured to be inserted into the deep hole.

[0015] The upper module is provided with a pressure-applying part for acting on the pole post. The pressure-applying part is located directly above the riveting part, and the center point of the surface of the pressure-applying part acting on the pole post coincides with the axis of the pole post.

[0016] In the mold-closed state, the force applied by the pressure-applying part and the riveting member toward the pole post is configured to be perpendicular to the end face of the pole post.

[0017] The relevant content in the above plan is explained as follows:

[0018] In the above solution, the cover assembly includes a top cover and a lower plastic piece. The upper surface of the top cover is provided with a positioning groove for positioning the lower plastic piece, and the lower surface abuts against the bottom of the positioning groove of the cover.

[0019] In the above scheme, the upper module moves up and down relative to the lower module in a direction perpendicular to the upper surface of the lower module. The working principle here can be referred to as the mold. The upper and lower modules are limited by guide pillars and guide sleeves. When fixed, the lower module is fixed and the upper module is fixed at the pressure end of the pressure device, thereby realizing the mold closing state and the mold opening state.

[0020] In the above solution, the battery top cover can be pre-positioned by the cover positioning groove on the fixed jig. The cover positioning groove in the positioning jig makes it convenient to place the battery top cover. At the same time, during the riveting process, the force direction of the pressure part and the riveting part towards the pole is perpendicular to the end face of the pole. This ensures that the battery top cover only has vertical displacement during the riveting process, and no relative displacement occurs in other directions. The produced product can achieve the required symmetry and compression, ensuring the efficiency and yield of the riveting process. Specifically, the battery top cover is placed directly in the cover positioning groove, and then the mold can be closed. At this time, the force direction of the pressure part and the riveting part towards the pole is perpendicular to the end face of the pole. At the same time, the center point of the action surface of the pressure part on the pole coincides with the axis of the pole. This ensures that the pole only has vertical displacement, and no relative displacement occurs in other directions.

[0021] In a further technical solution, the fixing fixture includes a positioning plate and a support plate;

[0022] The positioning plate is positioned and connected to the upper surface of the lower module, the cover plate positioning groove is disposed on the upper surface of the positioning plate, the lower surface of the positioning plate is provided with a bearing groove communicating with the cover plate positioning groove, the support plate is positioned and connected in the bearing groove, and the deep hole is disposed on the support plate.

[0023] The above design allows for quick restriction of the battery top cover. Specifically, the positioning plate is made of bakelite, a synthetic plastic made of phenolic resin, which prevents scratches on parts during assembly. For details, please refer to... Figure 10 and Figure 11 The positioning plate has positive / negative rivet block assembly holes (i.e., stepped slots used to position the upper plastic and rivet blocks) and top cover position holes (the top cover position holes are the cover plate positioning slots, which are large grooves that fix the top cover plate and the lower plastic, and the stepped slots are located at the bottom of the large grooves). The support plate is fixed on the carrier to prevent the positive and negative rivet block assemblies (i.e., the upper plastic and rivet blocks) from falling off during the riveting assembly process and to ensure that they do not deform under pressure.

[0024] During operation, the rivet block is positioned within the stepped slot and on the upper surface of the pallet. The upper plastic piece is positioned above the rivet block, the top cover plate is positioned within the cover plate positioning slot and above the upper plastic piece, and the lower plastic piece is positioned above the top cover plate. See the specific details below. Figure 7 .

[0025] In this situation, the pole can be quickly positioned and will no longer move around randomly.

[0026] In a further technical solution, the riveting component is a rivet pin. That is, the end of the rivet pin is the end that is inserted into the hole.

[0027] A further technical solution is that the lower module includes a lower mold fixing plate, a rivet fixing plate, and a lower mold bearing plate;

[0028] The lower mold support plate, the rivet fixing plate, and the lower mold fixing plate are arranged in order from top to bottom. The lower end of the riveting member is positioned and connected to the upper surface of the lower mold fixing plate, and the upper end of the riveting member passes through the lower surface of the rivet fixing plate to the upper surface of the lower mold fixing plate.

[0029] When the mold is closed, the upper end of the rivet extends beyond the upper surface of the lower mold assembly.

[0030] That is, in the mold closed state, the upper end of the rivet extends beyond the upper surface of the lower mold support plate.

[0031] In a further technical solution, the lower module also includes an elastic element and a limiting block;

[0032] The elastic element acts between the lower die support plate and the rivet fixing plate to give the lower die support plate a tendency to move away from the rivet fixing plate;

[0033] The upper surface of the lower mold support plate is positioned and connected to the limiting block.

[0034] In the above scheme, the elastic element can be a spring.

[0035] With the above design, once the battery top cover enters the demolding state after the riveting operation, the rivet fixing plate and the lower mold support plate can be separated by the elastic element, so that the end of the riveted part will not get stuck with the end of the terminal post, which would make it difficult to remove the battery top cover.

[0036] Specifically, during mold closing, the rivet fixing plate and the lower mold support plate are pressed together, and the tip of the rivet extends beyond the upper surface of the lower mold support plate and inserts into the deep hole to contact the lower end of the pole post and be subjected to force, thereby completing the pole post riveting. At the same time, since the upper surface of the lower mold support plate is positioned and connected to the limiting block, the descent of the pressure part can be limited. During demolding, the elastic element releases its elastic force, pushing the lower mold support plate away from the rivet fixing plate to form a gap, causing the rivet and the rivet fixing plate to undergo relative displacement to disengage from the pole post and avoid jamming.

[0037] In a further technical solution, the pole includes a column inserted into the pole mounting hole, the upper end of the column is positioned and connected to a pressing part, and the lower end of the column extends beyond the pole mounting hole and serves as a riveting end;

[0038] The battery top cover also includes an elastic portion that acts between the pressing portion and the upper surface of the cover assembly, so that the pressing portion tends to move away from the upper surface of the cover assembly.

[0039] Since the pole post can be a simple cylindrical structure, in this case, the surface on which the pressure applies to the upper end of the pole post is the end face of the cylindrical structure. At this time, the surfaces at both ends of the pole post are relatively small, and bending is prone to occur in the middle region along the length of the pole post. Therefore, the above design is used to solve this problem. Specifically:

[0040] The elastic part is a sealing ring. During the riveting process, the sealing ring inside the top cover will be compressed to a specified compression level, so that the movement of the column is the same as the compression level.

[0041] When the pressure part acts on the pressing part, it causes the pressing part to press down. The pressing part then compresses the elastic part. Due to the presence of the limiting block, the elastic part will stop after being compressed to the specified compression amount during the riveting process. This is because the presence of the limiting block can block the position of the pressure part, so that the elastic part can only be compressed by a certain amount.

[0042] In other words, when the pressing part moves down to a preset value, it means that the lower end of the column has also dropped by a preset value. When it comes into contact with the upper end of the riveting part, it deforms, thus realizing the riveting operation. That is, the pressure part pushes the pressing part and the column down together. Due to the presence of the elastic part, the pressing part will compress the elastic part when it descends, and the end of the column will be squeezed and deformed by the upper end of the riveting part when it descends.

[0043] It should be noted that there is a flared groove between the lower surface of the rivet block and the bottom of the main body, and the deformed position of the end of the column will be stuck into the flared groove.

[0044] After riveting is completed, the pressure part moves upward to unload, and the elastic potential energy stored in the sealing ring is released, pushing the pressing part to move the column upward and reset. At the same time, the elastic element (spring) of the lower mold group extends synchronously, driving the lower mold support plate to separate from the rivet fixing plate to form a dynamic gap, causing the rivet and the rivet fixing plate to undergo relative displacement to disengage from the pole post.

[0045] A further technical solution is that the upper module includes an upper mold base plate, an upper mold fixing plate, and a pressure head. With the height direction of the assembly device as a reference, the upper mold base plate, the upper mold fixing plate, and the pressure head are arranged sequentially from top to bottom. The pressure head is positioned and connected to the lower surface of the upper mold fixing plate and is arranged correspondingly to the pressing part. The pressure head is a pressure application part.

[0046] The amount of pressure head descent can be controlled by the contact between the upper mold fixing plate and the limiting block, and the riveting operation of the main body can be completed by the cooperation between the pressure head and the pressing part.

[0047] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0048] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0049] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0050] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0051] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0052] The working principle and advantages of this utility model are as follows:

[0053] This invention allows for pre-positioning of the battery top cover using a cover positioning groove on a fixing fixture. The cover positioning groove in the fixture facilitates the placement of the battery top cover. Furthermore, during the riveting process, the force applied by the pressure-applying part and the riveting component towards the electrode post is perpendicular to the end face of the electrode post. This ensures that the battery top cover only undergoes vertical displacement during riveting, preventing relative displacement in other directions. Consequently, the produced product achieves the required symmetry and compression, guaranteeing high efficiency and yield during the riveting process. Specifically, the battery top cover is placed directly in the cover positioning groove, and then the mold is closed. At this point, the force applied by the pressure-applying part and the riveting component towards the electrode post is perpendicular to the end face of the electrode post. Simultaneously, the center point of the surface of the pressure-applying part acting on the electrode post coincides with the axis of the electrode post, ensuring that the electrode post only undergoes vertical displacement, preventing relative displacement in other directions. Attached Figure Description

[0054] Appendix Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0055] Appendix Figure 2 This is a perspective view of the lower module in an embodiment of the present utility model;

[0056] Appendix Figure 3 This is an overall cross-sectional view of an embodiment of the present utility model;

[0057] Appendix Figure 4 This is a schematic diagram of the overall longitudinal section structure in an embodiment of this utility model;

[0058] Appendix Figure 5 This is a cross-sectional view of the lower module in an embodiment of the present utility model;

[0059] Appendix Figure 6 This is a schematic diagram of the longitudinal section structure of the lower mold in an embodiment of this utility model;

[0060] Appendix Figure 7 for Figure 6 Enlarged view of section A in the image;

[0061] Appendix Figure 8 This is a schematic diagram of the riveting component structure in an embodiment of the present utility model;

[0062] Appendix Figure 9 This is a schematic diagram of the structure when the cover plate assembly and the riveting component are riveted together in an embodiment of this utility model;

[0063] Appendix Figure 10 This is a perspective view of the fixing fixture in the embodiment of this utility model;

[0064] Appendix Figure 11 This is a schematic diagram of the longitudinal section structure of the fixing fixture in the embodiment of this utility model;

[0065] Appendix Figure 12 This is a schematic diagram of the longitudinal section structure of the cover plate assembly in an embodiment of this utility model.

[0066] In the attached diagrams above: 1. Cover plate assembly; 2. Upper plastic; 3. Riveting block; 4. Pole post; 5. Fixing jig; 6. Upper mold assembly; 7. Lower mold assembly; 8. Cover plate positioning groove; 9. Deep hole; 10. Riveting component; 11. Pressing part; 12. Positioning plate; 13. Support plate; 14. Lower mold fixing plate; 15. Rivet pin fixing plate; 16. Lower mold bearing plate; 17. Limiting block; 18. Elastic component; 19. Bearing groove; 20. Column; 21. Pressing part; 22. Upper mold base plate; 23. Upper mold fixing plate; 24. Elastic part; 101. Top cover plate; 102. Lower plastic; 801. Stepped slot. Detailed Implementation

[0067] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0068] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0069] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0070] See appendix Figures 1-12 As shown, a battery top cover assembly device is used for riveting and assembling the terminal post 4 of the battery top cover. The battery top cover includes a cover plate assembly 1 with a terminal post 4 mounting hole, a terminal post 4 that passes through the terminal post 4 mounting hole from one side of the cover plate assembly 1, and an upper plastic 2 and a riveting block 3 placed on the other side of the cover plate assembly 1.

[0071] The assembly device includes a fixing fixture 5, an upper module 6, and a lower module 7;

[0072] With the height direction of the assembly device as a reference, the upper module 6, the fixing fixture 5, and the lower module 7 are arranged sequentially from top to bottom;

[0073] The fixed fixture 5 is positioned and connected to the upper surface of the lower module 7. The upper module 6 moves up and down relative to the lower module 7 in a direction perpendicular to the upper surface of the lower module 7, thereby realizing the mold closing state and the mold opening state.

[0074] The upper surface of the fixing fixture 5 is provided with a cover plate positioning groove 8, which is configured to position and accommodate the battery top cover; the lower surface of the fixing fixture 5 is provided with a deep hole 9 at the position corresponding to the end of the pole post 4, the deep hole 9 communicates with the cover plate positioning groove 8, and the deep hole 9 is coaxially arranged with the pole post 4.

[0075] The lower module 7 is provided with a riveting member 10. The end of the riveting member 10 is directly opposite the deep hole 9 and the two are coaxially arranged. In the mold closed state, the end of the riveting member 10 is configured to be inserted into the deep hole 9.

[0076] The upper module 6 is provided with a pressure-applying part 11 for acting on the pole post 4. The pressure-applying part 11 is located directly above the riveting member 10, and the center point of the acting surface of the pressure-applying part 11 acting on the pole post 4 coincides with the axis of the pole post 4.

[0077] In the mold-closed state, the force applied by the pressure-applying part 11 and the riveting member 10 toward the pole post 4 is configured to be perpendicular to the end face of the pole post 4.

[0078] In this embodiment, the cover assembly 1 includes a top cover 101 and a lower plastic 102. The upper surface of the top cover 101 is provided with a positioning groove for positioning the lower plastic 102, and the lower surface abuts against the bottom of the cover positioning groove 8.

[0079] In the above scheme, the upper module 6 moves up and down relative to the lower module 7 in a direction perpendicular to the upper surface of the lower module 7. The working principle here can be referred to as the mold. The upper module 6 and the lower module 7 are limited by guide pillars and guide sleeves. When fixed, the lower module 7 is fixed and the upper module 6 is fixed at the pressure end of the pressure device, thereby realizing the mold closing state and the mold opening state.

[0080] In this embodiment, the battery top cover can be pre-positioned by the cover positioning groove 8 on the fixing fixture 5. The cover positioning groove 8 in the positioning fixture makes it convenient to place the battery top cover. At the same time, during the riveting process, the force direction of the pressure part 11 and the riveting part 10 towards the pole post 4 is perpendicular to the end face of the pole post 4, so that the battery top cover can only be displaced in the vertical direction during the riveting process, and no relative displacement can be generated in other directions. The produced product can achieve the required symmetry and compression, ensuring the efficiency and yield of the riveting process. Specifically, the battery top cover is placed directly in the cover positioning groove 8, and then it can enter the mold closing state. At this time, the force direction of the pressure part 11 and the riveting part 10 towards the pole post 4 is perpendicular to the end face of the pole post 4. At the same time, the center point of the action surface of the pressure part 11 acting on the pole post 4 coincides with the axis of the pole post 4, which can fully ensure that the pole post 4 can only be displaced in the vertical direction, and no relative displacement can be generated in other directions.

[0081] Preferably, the fixing fixture 5 includes a positioning plate 12 and a support plate 13;

[0082] The positioning plate 12 is positioned and connected to the upper surface of the lower module 7. The cover plate positioning groove 8 is provided on the upper surface of the positioning plate 12. The lower surface of the positioning plate 12 is provided with a bearing groove 19 that communicates with the cover plate positioning groove 8. The support plate 13 is positioned and connected in the bearing groove 19. The deep hole 9 is provided on the support plate 13.

[0083] The above design allows for quick restriction of the battery top cover. Specifically, the positioning plate 12 is made of bakelite, a synthetic plastic made of phenolic resin, which prevents scratches on parts during assembly. For details, please refer to... Figure 10 and Figure 11 The positioning plate 12 has positive / negative riveting block 3 component holes (i.e., stepped slots 801 used to position the upper plastic 2 and riveting block 3) and top cover position holes (the top cover position holes are the cover plate positioning slots 8, and the cover plate positioning slots 8 are a large groove that fixes the top cover plate 101 and the lower plastic 102, and the stepped slots 801 are set at the bottom of the large groove). The support plate 13 is fixed on the carrier to prevent the positive and negative riveting block 3 components (i.e., the upper plastic 2 and riveting block 3) from falling off during the riveting assembly process and to ensure that they do not deform under pressure.

[0084] During operation, the riveting block 3 is positioned within the stepped slot 801 and on the upper surface of the support plate 13. The upper plastic 2 is positioned above the riveting block 3. The top cover plate 101 is positioned within the cover plate positioning slot 8 and above the upper plastic 2. The lower plastic 102 is positioned above the top cover plate 101. See details [for further information]. Figure 7 .

[0085] In this situation, the pole 4 can quickly locate itself and will no longer move around randomly.

[0086] Preferably, the riveting component 10 is a rivet pin. That is, the end of the rivet pin is the end that is inserted into the deep hole 9.

[0087] Preferably, the lower module 7 includes a lower module fixing plate 14, a rivet fixing plate 15, and a lower module bearing plate 16;

[0088] The lower mold support plate 16, the rivet fixing plate 15, and the lower mold fixing plate 14 are arranged in order from top to bottom. The lower end of the riveting member 10 is positioned and connected to the upper surface of the lower mold fixing plate 14, and the upper end of the riveting member 10 passes through the lower surface of the rivet fixing plate 15 to the upper surface of the lower mold fixing plate 14.

[0089] In the mold-closed state, the upper end of the rivet extends beyond the upper surface of the lower mold assembly 7.

[0090] That is, in the mold closed state, the upper end of the rivet extends beyond the upper surface of the lower mold support plate 16.

[0091] Preferably, the lower module 7 further includes an elastic element 18 and a limiting block 17;

[0092] The elastic element 18 acts between the lower mold support plate 16 and the rivet fixing plate 15, so that the lower mold support plate 16 tends to move away from the rivet fixing plate 15.

[0093] The upper surface of the lower mold support plate 16 is positioned and connected to the limiting block 17.

[0094] In the above scheme, the elastic element 18 can be a spring.

[0095] With the above design, once the battery top cover is in the demolding state after the riveting operation, the rivet fixing plate 15 and the lower mold support plate 16 can be separated by the elastic element 18, so that the end of the riveting part 10 will not get stuck with the end of the pole post 4, which would make it difficult to remove the battery top cover.

[0096] Specifically, during mold closing, the rivet fixing plate 15 and the lower mold support plate 16 are pressed together, and the tip of the rivet extends beyond the upper surface of the lower mold support plate 16 and is inserted into the deep hole 9 to contact the lower end of the pole post 4 and be subjected to force, thereby completing the riveting of the pole post 4. At the same time, since the upper surface of the lower mold support plate 16 is positioned and connected to the limiting block 17, the descent of the pressure part 11 can be limited. During demolding, the elastic element 18 releases its elastic force, pushing the lower mold support plate 16 away from the rivet fixing plate 15 to form a gap, so that the rivet and the rivet fixing plate 15 undergo relative displacement to disengage from the pole post 4 and avoid jamming.

[0097] Preferably, the pole post 4 includes a post 20 inserted into the mounting hole of the pole post 4, the upper end of the post 20 is positioned and connected to a pressing part 21, and the lower end of the post 20 extends beyond the mounting hole of the pole post 4 and serves as a riveting end;

[0098] The battery top cover also includes an elastic portion 24, which acts between the pressing portion 21 and the upper surface of the cover assembly 1, so that the pressing portion 21 tends to move away from the upper surface of the cover assembly 1.

[0099] Since the pole post 4 can be a simple cylindrical structure, in this case, the surface on which the pressure-applying part 11 acts on the upper end of the pole post 4 is the end face of the cylindrical structure. At this time, the acting surfaces at both ends of the pole post 4 are relatively small, and the middle area along the length of the pole post 4 is prone to bending. Therefore, the above design is adopted to solve this problem. Specifically:

[0100] The elastic part 24 is a sealing ring. During the riveting process, the sealing ring inside the top cover will be compressed to a specified compression level, so that the movement of the column 20 is the same as the compression level.

[0101] When the pressure part 11 acts on the pressing part 21, it causes the pressing part 21 to press down. The pressing part 21 then compresses the elastic part 24. Due to the presence of the limiting block 17, the elastic part 24 will stop after being compressed to the specified compression amount during the riveting process. This is because the presence of the limiting block 17 can block the position of the pressure part 11, so that the elastic part 24 can only be compressed by a certain amount.

[0102] In other words, when the pressing part 21 moves down to a preset value, it means that the lower end of the column 20 has also dropped by a preset value. When it contacts the upper end of the riveting member 10, it deforms, thereby realizing the riveting operation. That is, the pressure part 11 pushes the pressing part 21 and the column 20 down together. Due to the presence of the elastic part 24, the pressing part 21 will compress the elastic part 24 when it descends. When the column 20 descends, its end is squeezed and deformed by the upper end of the riveting member 10.

[0103] It should be noted that there is a flared groove between the lower surface of the rivet block 3 and the bottom of the main body, and the deformed position of the end of the column 20 will be stuck into the flared groove.

[0104] After riveting is completed, the pressure part 11 moves upward to unload, the elastic potential energy stored in the sealing ring is released, and the pressing part 21 pushes the column 20 to move upward and reset. At the same time, the elastic element 18 (spring) of the lower mold 7 extends synchronously, driving the lower mold support plate 16 to separate from the rivet fixing plate 15 to form a dynamic gap, so that the rivet and the rivet fixing plate 15 are relatively displaced to disengage from the pole post 4.

[0105] Preferably, the upper module 6 includes an upper mold base plate 22, an upper mold fixing plate 23, and a pressure head. With the height direction of the assembly device as a reference, the upper mold base plate 22, the upper mold fixing plate 23, and the pressure head are arranged sequentially from top to bottom. The pressure head is positioned and connected to the lower surface of the upper mold fixing plate 23 and is correspondingly arranged with respect to the pressing part 21. The pressure head is a pressure application part 11.

[0106] By contacting the upper mold fixing plate 23 with the limiting block 17, the amount of pressure head descent can be controlled, and the cooperation between the pressure head and the pressing part 21 can complete the riveting operation of the main body.

[0107] Working principle:

[0108] according to Figure 12 The battery top cover is assembled in a state of lowering, but at this time the lower end of the column 20 has not deformed. Then, the battery top cover is placed in the cover plate positioning groove 8 so that the battery top cover is in the fixing fixture 5.

[0109] Then, the fixing fixture 5 is placed on the lower mold support plate 16. After that, the upper mold fixing plate 23 and the pressure part 11 are guided to descend. The amount of descent of the pressure head can be controlled by the contact between the upper mold fixing plate 23 and the limit block 17.

[0110] Specifically, when the pressure part 11 acts on the pressing part 21, it causes the pressing part 21 to press down. The pressing part 21 then compresses the elastic part 24. Due to the presence of the limiting block 17, the elastic part 24 will stop after being compressed to the specified compression amount during the riveting process. This is because the presence of the limiting block 17 can block the position of the pressure part 11, so that the elastic part 24 can only be compressed by a certain amount.

[0111] When the pressing part 21 moves down to a preset value, it means that the lower end of the column 20 has also dropped by a preset value. When it comes into contact with the upper end of the riveting member 10, it deforms, thereby realizing the riveting operation. That is, the pressure part 11 pushes the pressing part 21 and the column 20 down together. Due to the presence of the elastic part 24, the pressing part 21 will compress the elastic part 24 when it descends. When the column 20 descends, its end is squeezed and deformed by the upper end of the riveting member 10.

[0112] After riveting is completed, the pressure part 11 moves upward to unload, the elastic potential energy stored in the sealing ring is released, and the pressing part 21 pushes the column 20 to move upward and reset. At the same time, the elastic element 18 (spring) of the lower mold 7 extends synchronously, driving the lower mold support plate 16 to separate from the rivet fixing plate 15 to form a dynamic gap, so that the rivet and the rivet fixing plate 15 are relatively displaced to disengage from the pole post 4.

[0113] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A battery top cover assembly device for rivet assembly of a pole (4) of a battery top cover, characterized in that: The battery top cover comprises a cover sheet assembly (1) with a pole (4) mounting hole, a pole (4) penetrating into the pole (4) mounting hole from one side of the cover sheet assembly (1), and an upper plastic (2) and a riveting block (3) arranged on the other side of the cover sheet assembly (1); The assembling device comprises a fixed jig (5), an upper die set (6) and a lower die set (7); The upper die set (6), the fixed jig (5) and the lower die set (7) are arranged in sequence from top to bottom in the height direction of the assembling device; The fixed jig (5) is positioned and connected to the upper surface of the lower die set (7), and the upper die set (6) moves up and down relative to the lower die set (7) in the direction perpendicular to the upper surface of the lower die set (7), thereby realizing the closed die state and the open die state; The upper surface of the fixed jig (5) is provided with a cover sheet positioning groove (8) configured to position and accommodate the battery top cover; the lower surface of the fixed jig (5) is provided with a deep hole (9) at the corresponding position of the end of the pole (4), the deep hole (9) is in communication with the cover sheet positioning groove (8), and the deep hole (9) is coaxially arranged with the pole (4); The lower die set (7) is provided with a riveting piece (10), the end of the riveting piece (10) is opposite to the deep hole (9) and coaxially arranged with the deep hole (9), and in the closed die state, the end of the riveting piece (10) is configured to be inserted into the deep hole (9); The upper die set (6) is provided with a pressure applying part (11) for acting on the pole (4), the pressure applying part (11) is directly above the riveting piece (10), and the center point of the acting surface of the pressure applying part (11) on the pole (4) coincides with the axis of the pole (4); In the closed die state, the force direction of the pressure applying part (11) and the riveting piece (10) towards the pole (4) is perpendicular to the end surface of the pole (4).

2. The battery cup assembly apparatus of claim 1, wherein: The fixed jig (5) comprises a positioning plate (12) and a supporting plate (13); The positioning plate (12) is positioned and connected to the upper surface of the lower die set (7), the cover sheet positioning groove (8) is arranged on the upper surface of the positioning plate (12), the lower surface of the positioning plate (12) is provided with a bearing groove (19) in communication with the cover sheet positioning groove (8), the supporting plate (13) is positioned and connected in the bearing groove (19), and the deep hole (9) is arranged on the supporting plate (13).

3. The battery cup assembly apparatus of claim 1 or 2, wherein: The riveting piece (10) is a riveting needle.

4. The battery cup assembly apparatus of claim 1, wherein: The lower die set (7) comprises a lower die fixing plate (14), a riveting needle fixing plate (15) and a lower die bearing plate (16); The lower die bearing plate (16), the riveting needle fixing plate (15) and the lower die fixing plate (14) are arranged in sequence from top to bottom, the lower end of the riveting piece (10) is positioned and connected to the upper surface of the lower die fixing plate (14), and the upper end of the riveting piece (10) penetrates through the lower surface of the riveting needle fixing plate (15) to the upper surface of the lower die fixing plate (14); In the closed die state, the upper end of the riveting needle exceeds the upper surface of the lower die set (7).

5. The battery cup assembly apparatus of claim 4, wherein: The lower die set (7) further comprises elastic members (18) and limit blocks (17); The elastic members (18) act between the lower die bearing plate (16) and the rivet needle fixing plate (15), so that the lower die bearing plate (16) has a tendency to move away from the rivet needle fixing plate (15); The upper surface of the lower die bearing plate (16) is positioned and connected with the limit block (17).

6. The battery cup assembly apparatus of claim 1, wherein: The upper die set (6) comprises an upper die seat plate (22), an upper die fixing plate (23) and a pressure head, and from top to bottom, the upper die seat plate (22), the upper die fixing plate (23) and the pressure head are sequentially arranged, the pressure head is positioned and connected to the lower surface of the upper die fixing plate (23) and is correspondingly arranged with the pole (4), and the pressure head is a pressure applying part (11).

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