CN217405650U

CN217405650U - Top cover assembly

Info

Publication number: CN217405650U
Application number: CN202220684861.6U
Authority: CN
Inventors: 舒宽金
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-09-09
Anticipated expiration: 2032-03-25

Abstract

The utility model discloses a top cover assembly, including apron, setting terminal block and utmost point post in apron one side, be provided with first through-hole on the terminal block, the one end of utmost point post is inserted and is established in first through-hole, and utmost point post includes the body and encircles the boss that sets up in the body periphery, and the boss part at least is located first through-hole, and the boss passes through laser welding with one side that the terminal block is close to the apron, and the seam on the boss encircles the week portion of boss, the seam of the sealed boss of welding seam and first through-hole. The utility model discloses a top cap subassembly is through setting up the boss on utmost point post to with the first through-hole welding of terminal block, and set up the welding position of utmost point post and terminal block in the bottom of terminal block, can be when guaranteeing top cap subassembly leakproofness, hide the inside at the top cap subassembly with the appearance defect behind utmost point post and the terminal block laser welding, thereby improve the aesthetic property of apron subassembly outward appearance.

Description

Top cover assembly

Technical Field

The utility model relates to a battery technology field especially relates to a top cap subassembly.

Background

The top cap assembly is an important part of the battery composition and generally includes a top cap sheet, a terminal post, a terminal, and the like. Wherein, current top cap subassembly adopts friction welding fixed utmost point post mostly, and the friction welding process is with high costs, and efficiency is slow and the quality is unstable, has certain risk. Therefore, the fixing mode of the pole is improved in the prior art, riveting and laser welding are adopted to replace friction welding for assembly, the welding position of the pole and the terminal of the top cover assembly is arranged at one end, close to the outer part of the top cover assembly, of the terminal, the welding position is directly exposed on the outer surface of the top cover, but welding appearance defects such as air holes and welding holes exist in the laser welding process, so that the defects can be directly seen from the outer side of the top cover assembly, and the appearance of the top cover assembly and the battery is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: provided is a top cover assembly which has a simple structure, can hide defects caused by laser welding, and has a beautiful appearance.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, a top cover assembly is provided, which includes a cover plate, a terminal plate and a terminal post disposed on one side of the cover plate, a first through hole is disposed on the terminal plate, one end of the terminal post is inserted into the first through hole, the terminal post includes a body and a boss disposed around the periphery of the body, the boss is at least partially disposed in the first through hole, the boss and one side of the terminal plate close to the cover plate are welded by laser, a weld seam on the boss surrounds the periphery of the boss, and the weld seam seals a seam between the boss and the first through hole.

As a preferable aspect of the top cap assembly, the terminal plate includes a negative terminal plate, the negative terminal plate is a composite plate, the negative terminal plate includes a first metal plate adjacent to the cap plate, and the terminal includes a negative terminal post, and a material of the first metal plate is the same as a material of the negative terminal post.

As a preferable scheme of the top cover assembly, the first through hole is a stepped hole, the first through hole includes a first hole and a second hole, the size of the first hole is larger than that of the second hole, the boss is located in the first hole, and the pole is riveted with the second hole.

As a preferred scheme of the top cover assembly, a riveting ring is arranged in the second hole, a riveting groove is arranged on the pole, and the pole is riveted with the riveting ring in the second hole through the riveting groove.

As a preferable embodiment of the top cover assembly, a ratio of a maximum diameter of the boss to a maximum diameter of the body is X, where 1< X ≦ 8.

As a preferable scheme of the top cover assembly, the top cover assembly further includes a lower pole plate located below the terminal board, a second through hole is formed in the lower pole plate, and one end of the pole far away from the terminal board is inserted into the second through hole.

As a preferable mode of the top cover assembly, the second through hole includes a third hole and a fourth hole, the size of the third hole is smaller than that of the fourth hole, the third hole is provided on a side of the lower plate close to the terminal plate, and the pole passes through the third hole and is riveted with the fourth hole.

As a preferable mode of the top cover assembly, the fourth hole is a tapered hole, and the diameter of the fourth hole gradually increases toward a direction away from the third hole.

In a preferred embodiment of the cap assembly, the ratio of the minimum pore diameter to the maximum pore diameter of the fourth pores is 0.05 to 0.95.

As a preferable mode of the top cover assembly, the terminal post and one side of the lower pole plate, which is far away from the terminal plate, are welded by laser, and a welding seam on the terminal post surrounds the periphery of the terminal post, and the welding seam seals a seam between the terminal post and the fourth hole.

The embodiment of the utility model provides a beneficial effect does: through set up the boss on utmost point post, can be convenient for with the first through-hole welding of terminal block to set up the welding position of utmost point post and terminal block in the bottom of terminal block, can be when guaranteeing top cap subassembly leakproofness, hide the appearance defect behind utmost point post and the terminal block laser welding in the inside of top cap subassembly, thereby improve the aesthetic property of apron subassembly outward appearance.

Drawings

The present invention will be described in further detail with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of the top cover assembly according to an embodiment of the present invention.

Fig. 2 is an exploded assembly view of the cap assembly according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of the cap assembly according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of the negative terminal according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of the lower plate according to an embodiment of the present invention.

In the figure:

1. a terminal plate; 11. a first through hole; 111. a first hole; 112. a second hole; 113. riveting a ring; 12. a negative terminal plate; 121. a first metal plate; 122. a second metal plate; 2. a pole column; 21. a body; 22. a boss; 23. riveting the groove; 3. a lower polar plate; 31. a second through hole; 311. a third aperture; 312. a fourth aperture; 4. plastic is coated; 5. a cover plate; 6. plastic is arranged; 61. a convex portion; 7. and (5) sealing rings.

Detailed Description

In order to make the technical problems, the adopted technical solutions and the achieved technical effects of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 3, the top cover assembly of the present embodiment includes a cover plate 5, a terminal plate 1 and a terminal post 2 disposed above the cover plate 5, a first through hole 11 is disposed on the terminal plate 1 in a penetrating manner along a vertical direction, the terminal post 2 includes a body 21 and a boss 22 disposed around the periphery of the body 21, one end of the body 21 is inserted into the first through hole 11 from the bottom of the terminal plate 1, the boss 22 is at least partially disposed in the first through hole 11, the boss 22 and one side of the terminal plate 1 close to the cover plate 5 are welded by laser, a weld on the boss 22 surrounds the periphery of the boss 22, and the weld seals a seam between the boss 22 and the first through hole 11. Understandably, when one end of the pole 2 is inserted into the first through hole 11, the boss 22 is at least partially positioned at the bottom of the terminal board 1, the boss 22 is partially positioned into the first through hole 11, and the joint of the boss 22 and the first through hole 11 is blocked by the boss 22 and the terminal board through laser welding. This design is through setting up boss 22 on utmost point post 2, can be convenient for utmost point post 2 and terminal board 1 welding to set up the welding position of utmost point post 2 and terminal board 1 in the bottom of terminal board 1, can be when guaranteeing the top cap subassembly leakproofness, can hide the inside at the top cap subassembly with the appearance defect behind utmost point post 2 and the laser welding of terminal board 1, thereby improve the aesthetic property of top cap subassembly outward appearance.

Further, the material of the bottom of terminal plate 1 is the same as the material of post 2. Because the material is different can't pass through laser welding, the bottom of terminal block 1 adopts the same material with utmost point post 2, can set up the welding position of utmost point post 2 and terminal block 1 in the bottom of terminal block 1, is favorable to the welding of utmost point post 2 and terminal block 1.

Specifically, referring to fig. 3, the terminal board 1 includes a negative terminal board 12, the negative terminal board 12 is a composite board, the composite board includes a first metal plate 121 and a second metal plate 122, the first metal plate 121 is located below the second metal plate 122, namely, the first metal plate 121 is disposed on one side close to the cover plate 5, the first metal plate 121 is made of copper metal, the second metal plate 122 is made of aluminum metal, the post 2 includes a negative post, the negative post is made of copper metal, and the material of the first metal plate 121 is the same as that of the negative post. In order to ensure good conductivity of the terminal plate 1, the terminal plate 1 is generally made of aluminum metal. The terminal board 1 of this embodiment adopts the copper aluminium composite sheet to make, can realize that the material of negative terminal board 12 and the welding position of negative terminal post is the same, the welding of being convenient for when guaranteeing that terminal board 1 has good electric conductivity.

Preferably, referring to fig. 4, the first through hole 11 is a stepped hole, the first through hole 11 includes a first hole 111 and a second hole 112, the size of the first hole 111 is larger than that of the second hole 112 so as to accommodate the boss 22 in the first hole 111, the joint of the boss 22 and the first hole 111 is formed by laser welding, and the pole post 2 is riveted with the second hole 112. By providing the step hole, the boss 22 can be positioned in the first through hole 11 for welding, and the part of the body 21 positioned in the second hole 112 can be riveted with the second hole 112, so as to further ensure that the pole 2 is tightly connected with the terminal board 1.

Specifically, a riveting ring 113 is arranged in the second hole 112, the riveting ring 113 is arranged in the second hole 112 in a surrounding manner, when the pole 2 is riveted with the second hole 112, the pole 2 is extruded to form a riveting groove 23, and the pole 2 is riveted with the riveting ring 113 through the riveting groove 23.

Preferably, the ratio of the maximum diameter of the boss 22 to the maximum diameter of the body 21 is X, 1< X ≦ 8. The too big processing degree of difficulty that can increase utmost point post 2 of the diameter of boss 22, this design can reduce the processing degree of difficulty of utmost point post 2 effectively when guaranteeing boss 22 welded intensity.

By way of example, the terminal plate 1 comprises a positive terminal plate (not shown in the figures) made of aluminum metal, the post 2 comprises a positive post (not shown in the figures) made of aluminum metal, and the positive post can be directly laser welded to the bottom of the positive terminal plate.

Illustratively, the top cover assembly further comprises an upper plastic 4, a cover plate 5 and a lower plastic 6, wherein the upper plastic 4, the cover plate 5 and the lower plastic 6 are sequentially sleeved on the pole 2 from top to bottom, and the upper plastic 4, the cover plate 5 and the lower plastic 6 are tightly attached together.

Specifically, referring to fig. 2, at least two grooves (not shown) are formed on one side of the upper plastic 4 close to the lower plastic 6, and the protrusions 61 are formed on one side of the lower plastic 6 close to the upper plastic 4 corresponding to the grooves, when the upper plastic 4 and the lower plastic 6 are attached together, the protrusions 61 are respectively inserted into different grooves, so as to prevent the upper plastic 4 and the lower plastic 6 from twisting.

Illustratively, referring to fig. 3, the top cover assembly further includes a lower pole plate 3 located below the terminal board 1, the lower pole plate 3 is provided with a second through hole 31, one end of the pole 2 away from the terminal board 1 is inserted into the second through hole 31, and the lower pole plate 3 is attached to the bottom surface of the lower plastic 6 to form the top cover assembly.

Specifically, referring to fig. 5, the second through hole 31 includes a third hole 311 and a fourth hole 312, the size of the third hole 311 is smaller than that of the fourth hole 312, the third hole 311 is disposed on the side of the lower plate 3 close to the terminal plate 1, and the pole post 2 is riveted to the fourth hole 312 through the third hole 311. Bottom plate 3 passes through fourth hole 312 and 2 rivets of utmost point post, can link together bottom plate 3 and utmost point post 2 closely, and bottom plate 3 sets up respectively at the both ends of utmost point post 2 with terminal block 1 moreover, has the pretightning force between bottom plate 3 and the terminal block 1, can be better with last plastic 4, apron 5 and lower plastic 6 link together and guarantee top cap subassembly's leakproofness.

Furtherly, utmost point post 2 still overlaps and is equipped with sealing washer 7, and sealing washer 7 is located plastic 4, apron 5 and down between plastic 6 and utmost point post 2, and when polar plate 3 pasted tightly the bottom of plastic 6 under, lower polar plate 3 can compress tightly sealing washer 7, and the boss 22 of utmost point post 2 also can play the effect of supporting the compression of sealing washer 7 simultaneously, further improves top cap assembly's leakproofness.

Preferably, the fourth hole 312 is a tapered hole, and the diameter of the fourth hole 312 gradually increases toward a direction away from the third hole 311. This design can be convenient for fourth hole 312 and utmost point post 2 riveting, and the bell mouth can make 2 riveting back difficult follow fourth hole 312 roll-off of utmost point post, guarantees utmost point post 2 and is connected firmly with bottom plate 3.

Further, the ratio of the minimum aperture to the maximum aperture of the fourth aperture 312 is 0.05-0.95. This design can improve utmost point post 2 and the steadiness is connected with bottom plate 3 under the prerequisite of guaranteeing 3 structural strength of bottom plate.

Specifically, the terminal post 2 and the side of the lower pole plate 3 away from the terminal plate 1 are welded by laser, and a weld on the terminal post 2 surrounds the periphery of the terminal post 2, and the weld seals the seam between the terminal post 2 and the fourth hole 312. Utmost point post 2 and fourth hole 312 riveting back rethread laser welding, the connection of further assurance utmost point post 2 and bottom plate 3 is firm, is difficult for droing to can closely laminate between the spare part in the top cap subassembly, the leakproofness is good.

In the description herein, it is to be understood that the terms "upper" and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, configuration and operation in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In the description, schematic representations of the above terms do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. A top cover assembly is characterized by comprising a cover plate, a terminal plate and a pole, wherein the terminal plate and the pole are arranged on one side of the cover plate, a first through hole is formed in the terminal plate, one end of the pole is inserted into the first through hole, the pole comprises a body and a boss arranged around the periphery of the body, the boss is at least partially positioned in the first through hole, the boss and one side, close to the cover plate, of the terminal plate are welded through laser, a welding seam on the boss surrounds the periphery of the boss, and the welding seam seals the seam of the boss and the first through hole.

2. The cap assembly according to claim 1, wherein the terminal plate comprises a negative terminal plate, the negative terminal plate is a composite plate, the negative terminal plate comprises a first metal plate adjacent to the cap plate, the post comprises a negative post, and the first metal plate is made of the same material as the negative post.

3. The header assembly of claim 2, wherein the first through-hole is a stepped hole, the first through-hole comprises a first hole and a second hole that are in communication, the first hole has a size that is larger than the second hole, the boss is located within the first hole, and the post is riveted to the second hole.

4. The top cover assembly according to claim 3, wherein a riveting ring is arranged in the second hole, a riveting groove is arranged on the pole, and the pole is riveted with the riveting ring of the second hole through the riveting groove.

5. The header assembly of claim 1, wherein the ratio of the maximum diameter of the boss to the maximum diameter of the body is X, 1< X ≦ 8.

6. The top cover assembly according to any one of claims 1 to 5, further comprising a lower plate located below the terminal plate, wherein a second through hole is provided in the lower plate, and one end of the pole remote from the terminal plate is inserted into the second through hole.

7. The top cap assembly according to claim 6, wherein the second through hole includes a third hole and a fourth hole communicated with each other, the third hole having a size smaller than that of the fourth hole, the third hole being provided at a side of the lower plate adjacent to the terminal plate, the terminal post being riveted to the fourth hole through the third hole.

8. The header assembly of claim 7, wherein the fourth aperture is a tapered aperture, the fourth aperture having a diameter that increases in a direction away from the third aperture.

9. The header assembly of claim 8, wherein the ratio of the smallest diameter to the largest diameter of the fourth holes is 0.05-0.95.

10. The cap assembly according to claim 7, wherein the terminal post and the side of the lower electrode plate away from the terminal plate are laser welded, and a weld on the terminal post surrounds the periphery of the terminal post, the weld sealing a seam of the terminal post and the fourth hole.