CN217562686U

CN217562686U - Secondary battery welding block and secondary battery

Info

Publication number: CN217562686U
Application number: CN202221298459.0U
Authority: CN
Inventors: 喻先锋; 蔡云龙; 胡鹏; 刘微; 刘婵; 侯敏; 曹辉
Original assignee: Shanghai Ruipu Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-10-11
Anticipated expiration: 2032-05-26

Abstract

The application relates to a secondary battery welding block and a secondary battery, and relates to the field of batteries. This secondary battery welds piece includes the welding main part, be equipped with connect the through-hole in the welding main part, the welding main part includes first connection face and locates the second of first connection face offside is connected the face, connect the through-hole and be used for acceping utmost point post, first connection face be used for with the bottom surface subsides of going up utmost point post are established, the second is connected the face and is the rough surface, and is used for passing through the welding is connected to the second first connection face and the bottom surface of going up utmost point post. The application provides a secondary cell welding piece because the second is connected the face and is adopted the mat surface, and it can prevent the problem of the reflection of light of laser when laser welding, better avoided because the reflection of light takes place the bad problem of welding such as laser welding rosin, in addition, the setting of mat surface has also guaranteed welded quality as far as possible, has improved welded goodness, and the side has improved secondary cell top cap and secondary cell's safety.

Description

Secondary battery welding block and secondary battery

Technical Field

The application relates to the field of batteries, in particular to a secondary battery welding block and a secondary battery.

Background

At present, a top cover of a secondary battery structurally has a welded structure, and in the related art, an upper terminal of the top cover and a welded block of the welded structure are fixed on a top cover sheet of the top cover by welding in a penetration welding manner, and also in a manner that the upper terminal of the top cover is directly fixed on the top cover sheet by injection molding and welding, and then the upper terminal and another separate lower connection sheet are connected to the top cover by the penetration welding manner.

However, in the two connection modes, the upper pole is connected with the welding block or the lower connecting sheet by penetration welding laser welding, and the welding surface and other surfaces of the upper pole and the welding block or the lower connecting sheet are made of metal materials with smooth and bright surfaces, so that laser is easily reflected by the welding surface and other surfaces of the upper pole, poor welding such as insufficient welding is easily caused, and the safety of the secondary battery top cover and the secondary battery is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a secondary battery welding block and a secondary battery, and aims to solve the problem that poor welding such as insufficient welding is easily formed when the welding block is welded by other structures in the related art, so that the safety of a secondary battery top cover and the safety of the secondary battery are affected.

In a first aspect, there is provided a secondary battery welding block, including:

the welding body is provided with a connecting through hole and comprises a first connecting surface and a second connecting surface arranged on the opposite side of the first connecting surface;

the connecting through hole is used for accommodating an upper pole, the first connecting surface is used for being attached to the bottom surface of the upper pole, and the second connecting surface is a rough surface and used for welding the first connecting surface and the bottom surface of the upper pole through the second connecting surface.

In some embodiments, the secondary battery welding block further includes an extending convex edge, an inner side edge of the extending convex edge is connected with an outer side edge of the welding main body, the extending convex edge includes a third connection surface and a fourth connection surface, and a horizontal height of the third connection surface is not higher than a horizontal height of the second connection surface;

the third connecting surface is used for being attached to the lower insulating part, and the fourth connecting surface is a rough surface and is used for being welded to the bottom surfaces of the third connecting surface and the lower insulating part through the fourth connecting surface.

In some embodiments, a plurality of grooves are disposed on the second connecting surface and the fourth connecting surface at intervals.

In some embodiments, a plurality of protrusions are disposed on the second connection surface and the fourth connection surface.

In some embodiments, the grooves and the bumps are rectangular, square, circular, or triangular in shape.

In some embodiments, the areas of the second connecting surface and the fourth connecting surface where the grooves or the protrusions are not provided are both frosted surfaces.

In some embodiments, the second joint face and the fourth joint face are both frosted faces.

In some embodiments, a plurality of frosted areas are disposed on each of the second connecting surface and the fourth connecting surface, a total area of all the frosted areas on the second connecting surface is not less than 50% of an area of the second connecting surface, and a total area of all the frosted areas on the fourth connecting surface is not less than 50% of an area of the fourth connecting surface.

In some embodiments, the weld body is integrally formed with the extending flange.

In a second aspect, there is provided a secondary battery including: the secondary battery weld block described above.

The technical scheme who provides this application brings beneficial effect includes:

the embodiment of the application provides a secondary battery welding block, because the welding main part includes first connection face and locates the second connection face of first connection face offside, make first connection face be used for pasting with the bottom surface of last utmost point post and establish, and make the second connect the face to be rough, in order to be used for connecting the bottom surface of first connection face of face welding and last utmost point post through the second, therefore, because the second is connected the face and is adopted rough, it can prevent the problem of the reflection of laser light when laser welding, better avoid because the reflection of light takes place the problem of welding defects such as laser welding rosin, in addition, welded quality has also been guaranteed as far as possible in the setting of rough, welded goodness has been improved, the side has improved secondary battery top cap and secondary battery's safety.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a structure of a top cap of a secondary battery according to an embodiment of the present disclosure;

fig. 2 is a vertical sectional view of a secondary battery welding block provided in an embodiment of the present application, as mounted on a top cover;

FIG. 3 is a schematic structural view of a welded secondary battery block provided in an embodiment of the present application without an extended flange;

fig. 4 is a schematic structural diagram of a secondary battery welding block provided in an embodiment of the present application when the secondary battery welding block includes an extended convex edge and when a groove is provided;

fig. 5 is a schematic structural diagram of a secondary battery welding block provided in an embodiment of the present application when the secondary battery welding block includes an extended convex edge and when a bump is provided.

In the figure: 1-welding a main body, 10-a first connecting surface, 11-a second connecting surface, 12-a groove, 13-a bump, 14-a connecting through hole, 2-an upper pole, 3-an extending convex edge, 30-a third connecting surface, 31-a fourth connecting surface, 4-a lower insulating part, 5-a top cover plate, 6-an upper plastic part, 7-a sealing part and 8-an explosion-proof valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a secondary battery welding block, which can solve the problem that poor welding such as insufficient welding is easily formed when the welding block is welded by other structures in the related art, so that the safety of a secondary battery top cover and a secondary battery is influenced.

Referring to fig. 1 and 3, the secondary battery welding block mainly includes a welding main body 1, a connection through hole 14 is provided on the welding main body 1, the welding main body 1 includes a first connection surface 10 and a second connection surface 11 disposed on the opposite side of the first connection surface 10, the connection through hole 14 is used for accommodating the upper electrode post 2, the first connection surface 10 is used for being attached to the bottom surface of the upper electrode post 2, and the second connection surface 11 is a rough surface and is used for welding the first connection surface 10 and the bottom surface of the upper electrode post 2 through the second connection surface 11.

Specifically, the connection through-hole 14 is configured to receive the bottom portion of the upper pole 2, and therefore, the shape of the connection through-hole 14 may be a plurality of suitable shapes in accordance with the shape of the bottom portion of the upper pole 2, and preferably, the connection through-hole 14 is circular in view of structural design. Because this welding subject 1 of secondary cell welding piece includes first connection face 10 and locates the second connection face 11 of first connection face 10 offside, make first connection face 10 be used for setting up with the bottom surface subsides of last utmost point post 2, and make second connection face 11 be the mat surface, in order to be used for connecting the first connection face 10 of face and the bottom surface of last utmost point post 2 of 11 welding through the second, consequently, because second connection face 11 adopts the mat surface, it can prevent the problem of the reflection of light of laser when laser welding, better avoid because the reflection of light takes place the bad problems of welding such as laser welding rosin joint, in addition, the welded quality has also been guaranteed as far as possible in the setting of mat surface, the welded goodness has been improved, the side has improved secondary cell top cap and secondary cell's safety.

Further, in order to ensure the connection stability, the secondary battery welding block further comprises an extending convex edge 3, the inner side edge of the extending convex edge 3 is connected with the outer side edge of the welding main body 1, the extending convex edge 3 comprises a third connection surface 30 and a fourth connection surface 31, and the horizontal height of the third connection surface 30 is not higher than the horizontal height of the second connection surface 11; the third connection surface 30 is used for being attached to the lower insulating member 4, and the fourth connection surface 31 is a rough surface and is used for welding the third connection surface 30 and the bottom surface of the lower insulating member 4 through the fourth connection surface 31.

Specifically, the inboard edge of extending chimb 3 links to each other with the outside edge of welding main part 1, and wherein, the shape of welding main part 1 can be square, also can be circular, and the shape of extending chimb 3 then corresponds with the shape of welding main part 1, if welding main part 1 is circular, then extends chimb 3 wholly and is the annular, if welding main part 1 is square, then extends chimb 3 and is equipped with the square of through-hole for the center. Third is connected face 30 and is established with the subsides of lower insulating part 4, and fourth is connected face 31 and is the mat face, and mainly used connects the face 31 through the fourth and welds the third and connect face 30 and the bottom surface of insulating part 4 down, outside can further guaranteeing the holistic connection steadiness of battery welding piece, fourth is connected face 31 and has also avoided the fourth to connect the face 31 reflection of light when welding the bottom surface of first connection face 10 and last utmost point post 2 for setting up of mat face.

Further, referring to fig. 4, a plurality of grooves 12 are disposed at intervals on the second connecting surface 11 and the fourth connecting surface 31.

Further, referring to fig. 5, a plurality of bumps 13 are disposed on the second connecting surface 11 and the fourth connecting surface 31 at intervals.

Further, the shape of the groove 12 and the bump 13 is rectangular, square, circular or triangular. Specifically, the effect that the rough surface weakens the reflection of light can both be reached through setting up recess 12 and also through setting up lug 13 on the face 11 and the fourth connection face 31 through connecting to the second, no matter set up recess 12 or set up lug 13, all can be integrated into one piece when the preparation welding piece, need not to increase extra process again after the reproduction welding piece, and need not increase extra manufacturing and set up, has reduced cost of manufacture and cost of labor as far as possible. In addition, the second connecting surface 11 and the fourth connecting surface 31 may be provided with both the groove 12 and the protrusion 13 to form a rough surface, and in other embodiments, other suitable structures capable of achieving a rough surface may be provided. In addition, the shape of the grooves 12 is preferably rectangular from the viewpoint of manufacturing material cost and overall weight, and in this case, the grooves 12 are distributed along the edge of the through-hole in a petal-dispersed manner from the viewpoint of light reflection effect and easiness of manufacturing, and the shape of the projections 13 is preferably a structure having a relatively small area and weight, such as a square, a circle, or a triangle.

Furthermore, the areas of the second connecting surface 11 and the fourth connecting surface 31 without the grooves 12 or the protrusions 13 are frosted surfaces. Specifically, in order to reduce the problem of light reflection during welding as much as possible and ensure the quality and the goodness of the welding, the other vacant regions of the second connecting surface 11 and the fourth connecting surface 31 where the grooves 12 or the protrusions 13 are not provided are set as frosted surfaces.

Further, the second connecting surface 11 and the fourth connecting surface 31 are both frosted surfaces. Specifically, in addition to providing the grooves 12 or the protrusions 13 on the second connection surface 11 and the fourth connection surface 31, both the second connection surface 11 and the fourth connection surface 31 may be directly set as frosted surfaces.

Further, the second connecting surface 11 and the fourth connecting surface 31 are both provided with a plurality of frosted areas arranged at intervals, the total area of all the frosted areas on the second connecting surface 11 is not less than 50% of the area of the second connecting surface 11, and the total area of all the frosted areas on the fourth connecting surface 31 is not less than 50% of the area of the fourth connecting surface 31. Specifically, when reaching the purpose of weakening the reflection of light through set up dull polish region on second connection face 11 and fourth connection face 31, the regional area of general dull polish can obtain better reflection-proof effect after reaching certain, consequently, can be through connecting the dull polish region that all is equipped with a plurality of intervals and sets up on face 11 and the fourth connection face 31 through the second, reach the effect that effectively prevents the reflection of light when welding.

Wherein, the second of this application is connected 11 and the fourth and is connected the structure that forms the mat surface on the face 31 and can the independent assortment, as long as can reach better anti-reflection of light effect can, for example, can set up square bump 13 on the face 11 is connected to the second, set up the frosting on the face 31 is connected to the fourth, also can connect face 11 and fourth and connect all to set up rectangular recess 12 on the face 31 at the second, can also connect the face 11 and set up the frosting on the face 11 at the second, set up bump 13 or recess 12 on the face 31 is connected to the fourth, all belong to the protection scope of this application.

Further, the welding main body 1 and the extension flange 3 are integrally formed.

The present application also provides a secondary battery, which includes the above-described secondary battery welding block, as shown in fig. 1 and 2. Concretely, this secondary cell's top cap mainly includes top cap piece 5, go up utmost point post 2, battery welding piece, go up plastic part 6, sealing member 7 and explosion-proof valve 8, wherein, battery welding piece and last utmost point post 2 assembly and welded fastening are on top cap piece 5, it is located between top cap piece 5 and last utmost point post 2 and encloses and establish utmost point post to go up plastic part 6, to insulating the isolation between top cap piece 5 and last utmost point post 2, sealing member 7 is located between top cap piece 5 and last utmost point post 2 in order to seal the secondary cell top cap, lower insulating part 4 is located between top cap piece 5 and the battery welding piece, to insulating the isolation between top cap piece 5 and the battery welding piece, because the second of battery welding piece is connected 11 and fourth and is the rough face, consequently when welding battery welding piece respectively with last utmost point post 2 and lower insulating part 4, can be better avoid because the bad problems of welding such as the laser welding takes place the laser welding rosin joint of reflection of light, guarantee welded quality and goodness, and then secondary cell's safety has been improved.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A secondary battery weld block, comprising:

the welding body (1) is provided with a connecting through hole (14), and the welding body (1) comprises a first connecting surface (10) and a second connecting surface (11) arranged on the opposite side of the first connecting surface (10);

the connecting through hole (14) is used for accommodating the upper pole (2), the first connecting surface (10) is used for being attached to the bottom surface of the upper pole (2), and the second connecting surface (11) is a rough surface and used for welding the first connecting surface (10) and the bottom surface of the upper pole (2) through the second connecting surface (11).

2. A secondary battery weld block as defined in claim 1, wherein:

the secondary battery welding block further comprises an extending convex edge (3), the inner side edge of the extending convex edge (3) is connected with the outer side edge of the welding main body (1), the extending convex edge (3) comprises a third connecting surface (30) and a fourth connecting surface (31), and the horizontal height of the third connecting surface (30) is not higher than the horizontal height of the second connecting surface (11);

the third connecting surface (30) is used for being attached to the lower insulating part (4), and the fourth connecting surface (31) is a rough surface and used for welding the third connecting surface (30) and the bottom surface of the lower insulating part (4) through the fourth connecting surface (31).

3. A secondary battery weld block according to claim 2, wherein: and the second connecting surface (11) and the fourth connecting surface (31) are both provided with a plurality of grooves (12) arranged at intervals.

4. A secondary battery weld block as defined in claim 3, wherein: and the second connecting surface (11) and the fourth connecting surface (31) are provided with a plurality of lugs (13) arranged at intervals.

5. The secondary battery weld block as set forth in claim 4, wherein: the grooves (12) and the bumps (13) are rectangular, square, circular or triangular.

6. The secondary battery weld block as set forth in claim 4, wherein: the second connecting surface (11) and the fourth connecting surface (31) are both frosted surfaces in areas where the grooves (12) or the bumps (13) are not arranged.

7. A secondary battery weld block according to claim 1, wherein: and the second connecting surface (11) and the fourth connecting surface (31) are both frosted surfaces.

8. A secondary battery weld block as defined in claim 1, wherein: the second is connected all to be equipped with the dull polish region that a plurality of intervals set up on face (11) and the fourth is connected, the second is connected face (11) and is gone up the regional total area of all dull polish and not less than the second is connected face (11) 50% of area, the fourth is connected face (31) and is gone up the regional total area of all dull polish and not less than the fourth is connected 50% of face (31) area.

9. A secondary battery weld block as defined in claim 1, wherein: the welding main body (1) and the extension convex edge (3) are integrally formed.

10. A secondary battery, characterized in that it comprises: the secondary battery welded block according to any one of claims 1 to 9.