CN219534809U - Cylinder battery top cap subassembly and cylinder battery - Google Patents
Cylinder battery top cap subassembly and cylinder battery Download PDFInfo
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- CN219534809U CN219534809U CN202320024837.4U CN202320024837U CN219534809U CN 219534809 U CN219534809 U CN 219534809U CN 202320024837 U CN202320024837 U CN 202320024837U CN 219534809 U CN219534809 U CN 219534809U
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- pole
- cylindrical battery
- top cap
- cap assembly
- connecting sheet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of batteries, and particularly relates to a cylindrical battery top cover assembly, which comprises a connecting sheet and a pole column, wherein the connecting sheet is provided with a first guide part, the pole column is provided with a second guide part correspondingly matched with the first guide part, the first guide part of the connecting sheet is provided with a first connecting part, and the second guide part of the pole column is provided with a second connecting part which is matched with the first connecting part and is in surface contact. The utility model can solve the problem of the welding position deviation of the connecting sheet and the polar column of the cylindrical battery, and meanwhile, the space occupation of the connecting sheet in the height direction of the cylindrical battery core is not increased. In addition, the utility model also provides a cylindrical battery.
Description
Technical Field
The utility model belongs to the technical field of batteries, and particularly relates to a cylindrical battery top cover assembly and a cylindrical battery.
Background
Nowadays, with the development of modern society and the enhancement of environmental awareness of people, more and more devices select lithium ion batteries as power sources, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, which provides a wide space for the application and development of the lithium ion batteries.
The welding of the connecting piece and the pole of the existing battery generally has the problem of poor welding fixation, and when the battery core is manufactured in a mass production mode, a part of the battery core is different in diameter size due to winding errors, so that the connecting piece and the battery core cannot be well matched, position errors are generated between the connecting piece on the battery core and the pole, welding equipment enters the welding position of the connecting piece and the pole to have certain deviation, the consistency of a welding area cannot be guaranteed, meanwhile, the assembling structure can also cause the risk that welding spots do not completely fall on the pole, and the defect of unstable welding is easily generated. For this reason, a new solution is needed to solve the above-mentioned problems.
Disclosure of Invention
One of the objects of the present utility model is: to the not enough of prior art, provide a cylinder battery top cap subassembly, it can solve the connection piece of cylinder battery and the problem of utmost point post welding position deviation, can not increase the space occupation of connection piece in cylinder electric core direction of height simultaneously.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a cylindrical battery top cap assembly comprising a connecting piece and a pole, wherein the connecting piece is provided with a first guide part, and the pole is provided with a second guide part correspondingly matched with the first guide part;
the first guide part of the connecting sheet is provided with a first connecting part, and the second guide part of the pole column is provided with a second connecting part which is matched with the first connecting part and is in surface contact.
Preferably, the first connecting portion is a groove, and the second connecting portion is a protrusion.
Preferably, the projection area of the groove orthographic projection on the connecting sheet accounts for 1% -20% of the orthographic projection area of the connecting sheet.
Preferably, the first connecting portion is a convex portion, and the second connecting portion is a concave portion.
Preferably, the depth of the groove and the height of the convex part are respectively 0.5mm-5mm.
Preferably, at least part of the first guiding part protrudes outwards from the connecting sheet towards the direction facing the pole, and the first guiding part can form a hollow columnar structure.
Preferably, the second guide portion has a third connecting portion provided along a circumferential direction of the second connecting portion, the third connecting portion protruding outward in a direction facing the connecting piece and being in surface contact with the first guide portion.
Preferably, on the cross section of the pole, the third connecting portion and the second connecting portion are connected to form an inverted concave structure or an inverted mountain structure, and the structure can play a role in buffering when the battery cell moves up and down, so that the upper and lower direction of the battery cell is prevented from being desoldered.
Preferably, the top cover assembly further comprises a housing provided with a mounting hole adapted to the pole, at least part of the pole is accommodated in the mounting hole, and the connecting piece is arranged in the housing.
Preferably, the shell and the pole and the shell and the connecting sheet are connected in an insulating way through an insulating piece.
The second object of the present utility model is: the cylindrical battery comprises an electric core and the cylindrical battery top cover assembly, wherein one end of the electric core is in surface contact with one side of the connecting sheet, which is opposite to the pole, of the connecting sheet.
Preferably, one end of the electric core far away from the connecting sheet is connected to the inner bottom wall of the shell of the cylindrical battery through a connecting fixing piece.
The top cover assembly has the beneficial effects that the top cover assembly comprises the connecting piece and the pole, the connecting piece is provided with the first guide part, the pole is provided with the second guide part which is correspondingly matched with the first guide part, the first guide part of the connecting piece is provided with the first connecting part, the second guide part of the pole is provided with the second connecting part which is matched with the first connecting part and is in surface contact with the first connecting part, in the welding fixation of the first connecting part and the second connecting part, the welding position of the connecting piece and the pole can be ensured to fall on the pole, meanwhile, the first guide part and the second guide part are correspondingly matched with each other to play a buffering role when the battery core moves up and down, the upper and lower directions of the top cover assembly are prevented from being unwelded, so that the contact assembly of the connecting piece and the pole is ensured to be stable and firm, the defect that the connecting piece and the pole of a cylindrical battery are deviated in welding position and are not firm is overcome, meanwhile, the space occupation of the connecting piece in the height direction of the cylindrical battery core is not increased, and the universality and the practicability of the top cover assembly are effectively improved.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
Fig. 1 is an exploded view of a connection tab and post according to a first embodiment of the present utility model.
Fig. 1a is a top view of a connecting piece according to a first embodiment of the present utility model.
Fig. 1b is a schematic view illustrating the assembly of a connection piece, a pole and a housing according to a first embodiment of the present utility model.
Fig. 2 is an exploded view of a connection tab and post according to a second embodiment of the present utility model.
Fig. 3 is an exploded view of a tab and post of a third embodiment of the utility model.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the present utility model.
Wherein reference numerals are as follows:
1. a connecting sheet; 11. a first guide part; 12. a first connection portion; 2. a pole; 21. a second guide part; 22. a second connecting portion; 23. a third connecting portion; 3. a housing; 4. an insulating member; 5. a battery cell; 6. and connecting the fixing piece.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The present utility model will be described in further detail below with reference to fig. 1 to 4 and the specific embodiments, but is not limited thereto.
Embodiment one
A cylindrical battery top cap assembly, see fig. 1, comprising:
a connecting piece 1, the connecting piece 1 having a first guide portion 11;
the pole 2, pole 2 has the second guiding portion 21 that corresponds the matching with first guiding portion 11 to, the first guiding portion 11 of connection piece 1 has first connecting portion 12, and the second guiding portion 21 of pole 2 has the second connecting portion 22 that just is the face contact with first connecting portion 12 looks adaptation, and first connecting portion 12 is the recess, and second connecting portion 22 is the convex part, thereby makes connection piece 1 and pole 2 connect with unsmooth matched mode, ensures that the welding position of connection piece 1 and pole 2 falls at pole 2, ensures that connection piece 1 and pole 2 welding firmly.
The side of the connection piece 1 with the groove is used for facing the pole 2, the side of the connection piece 1 facing away from the pole 2 is used for welding with the positive or negative lug of the cell 5 in fig. 4, see fig. 1 and 1a, and the groove and the protrusion can be located in the center of the connection piece 1 and the pole 2, respectively.
In the connection piece 1, the connection piece 1 comprises a first welding area, a second welding area and an area matched with the second connection part 22 of the pole 2 in a guiding way, wherein the first welding area is an area of the connection piece 1, which is opposite to the pole 2, except for the back of the groove, the second welding area is a bottom wall area of the groove, the area matched with the second connection part 22 of the pole 2 in a guiding way surrounds the second welding area, at least part of the first welding area is used for welding with the positive lug or the negative lug of the battery cell 5 in fig. 4, and at least part of the second welding area is used for welding with the pole 2.
In the connecting piece 1, the first welding area may be annular, and the annular radius of the first welding area may account for 20% -80% of the radius of the battery cell 5.
In the connection piece 1, the region of the first guide portion 11 in guide fit with the second connection portion 22 of the pole 2 is a concentric circle arranged around the axis of the connection piece 1, and the radius of the concentric circle may be 1mm to 5mm.
Preferably, the projection area of the orthographic projection of the groove on the connecting sheet 1 accounts for 1% -20% of the orthographic projection area of the connecting sheet 1, wherein the convex part can be cylindrical, the bottom wall area of the groove can be circular, and the radius of the circular can account for 1% -20% of the radius of the battery cell 5.
Preferably, the depth of the groove and the height of the convex part are respectively 0.5mm-5mm, the depth of the groove and the height of the convex part are equal, and specifically, the depth of the groove can be 0.5mm-2mm, 2mm-3.5mm and 3.5mm-5mm.
Preferably, the part of the first guiding part 11, which is in guiding fit with the second connecting part 22 of the pole 2, protrudes outwards from the connecting sheet 1 towards the direction facing the pole 2, the cross section of the second guiding part 21 is of a convex-shaped structure, the first guiding part 11 can form a hollow columnar structure or an annular protruding structure, wherein the annular protruding structure has better flexibility, and the annular protruding structure can also play a role in buffering when the battery cell 5 moves up and down, so that the battery cell 5 is prevented from vibrating in the up and down direction during transportation to cause the desoldering of the welding area of the pole 2 and the connecting sheet 1.
Preferably, referring to fig. 1b, the top cover assembly further comprises a housing 3, the housing 3 is provided with a mounting hole adapted to the pole 2, at least part of the pole 2 is accommodated in the mounting hole, and the connection piece 1 is disposed inside the housing 3.
Preferably, the shell 3 is a steel shell, the electrical property of the steel shell is opposite to that of the pole 2 and the connecting sheet 1, the shell 3 is connected with the pole 2 and the shell 3 is connected with the connecting sheet 1 in an insulating way through the insulating piece 4, the insulating piece 4 can seal the gap between the mounting hole and the pole 2, and the pole 2 and the connecting sheet 1 are prevented from being in direct contact with the shell 3 respectively.
Second embodiment
Unlike the first embodiment, referring to fig. 2, the second connecting portion 22 is circumferentially connected with the third connecting portion 23, the second guiding portion 21 includes the second connecting portion 22 and the third connecting portion 23 disposed along the circumference of the second connecting portion 22, the third connecting portion 23 protrudes toward the direction facing the connecting piece 1 and is in surface contact with the first guiding portion 11, wherein, on the cross section of the pole 2, a groove is disposed between the third connecting portion 23 and the second connecting portion 22 at intervals, the third connecting portion 23 and the second connecting portion 22 are connected to form an inverted mountain-shaped structure, which can play a role of buffering when the battery cell 5 moves up and down, and prevent the welding in the up and down direction.
Other structures are the same as those of the first embodiment, and will not be described here again.
Embodiment III
Unlike the first embodiment, referring to fig. 3, the first connection portion 12 of the present embodiment is a protrusion, the second connection portion 22 is a groove, and the first connection portion 12 protrudes from the connection piece 1 toward the pole 2.
In the pole 2, the second guide portion 21 has a third connecting portion 23 provided along the circumferential direction of the second connecting portion 22, and the third connecting portion 23 protrudes in the direction facing the connecting piece 1 and comes into surface contact with the first guide portion 11.
On the cross section of the pole 2, the third connecting part 23 and the second connecting part 22 are connected to form an inverted concave structure, so that the assembly stability of the connecting sheet 1 and the pole 2 can be ensured to be better, and the contact area is larger.
Wherein, the convex part of the connecting sheet 1 is used as a welding area with the pole 2, and the welding area of the welding area is larger, so that the welding between the connecting sheet 1 and the pole 2 is firmer.
Other structures are the same as those of the first embodiment, and will not be described here again.
Fourth embodiment
Referring to fig. 4, a cylindrical battery comprises a battery cell 5 and a cylindrical battery top cover assembly according to any one of the first to third embodiments, wherein one end of the battery cell 5 is in surface contact with one side of the connecting sheet 1, which is away from the pole 2.
Preferably, the end of the cell 5 remote from the connecting piece 1 is connected to the inner bottom wall of the housing 3 of the cylindrical battery by means of a connecting fixture 6.
The battery cell 5 mainly adopts the utmost point ear to rub flat, then the connection piece 1 rub plane welding with the utmost point ear, and specifically, connection piece 1 is anodal connection piece, and utmost point post 2 is anodal post, and connection mounting 6 is the negative pole connection piece, anodal connection piece and anodal post welding, and the negative pole connection piece is with the inner wall or the apron welding of steel casing. The welding of the positive electrode connecting sheet and the positive electrode column can carry out resistance welding on the central area where the connecting sheet 1 and the electrode column 2 are in contact, so that the problem of welding position deviation of the positive electrode connecting sheet and the positive electrode column of the cylindrical battery is solved, and meanwhile, the space occupation of the connecting sheet 1 in the height direction of the cylindrical battery core is not increased.
The process flow of assembling the battery cell 5 may be:
1. winding a cylindrical bare cell;
2. kneading or patting the positive and negative lugs;
3. the negative electrode connecting sheet is welded with the annular cover plate in advance to form a part (negative electrode cover plate assembly);
4. the positive electrode tab is welded with a first welding area of the positive electrode connecting sheet, and the negative electrode tab is welded with a negative electrode connecting sheet in the negative electrode cover plate assembly;
5. the cell assembly is put into the shell;
6. the second welding area of the positive electrode connecting sheet is welded with the positive electrode post.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.
Claims (10)
1. A cylindrical battery top cap assembly, comprising:
a connecting piece (1) having a first guide portion (11);
a pole (2) having a second guide portion (21) corresponding to the first guide portion (11);
the first guide part (11) of the connecting sheet (1) is provided with a first connecting part (12), and the second guide part (21) of the pole (2) is provided with a second connecting part (22) which is matched with the first connecting part (12) and is in surface contact.
2. A cylindrical battery top cap assembly according to claim 1, wherein: the first connecting portion (12) is a groove, and the second connecting portion (22) is a convex portion.
3. A cylindrical battery top cap assembly according to claim 2, wherein: the projection area of the groove orthographic projection on the connecting sheet (1) accounts for 1% -20% of the orthographic projection area of the connecting sheet (1).
4. A cylindrical battery top cap assembly according to claim 1, wherein: the first connecting part (12) is a convex part, and the second connecting part (22) is a groove.
5. A cylindrical battery top cap assembly according to claim 2 or 4, wherein: the depth of the groove and the height of the convex part are respectively 0.5mm-5mm.
6. A cylindrical battery top cap assembly according to claim 2 or 4, wherein: at least part of the first guide part (11) protrudes outwards from the connecting piece (1) towards the pole (2).
7. The cylindrical battery top cap assembly according to claim 6, wherein: the second guide part (21) is provided with a third connecting part (23) arranged along the circumferential direction of the second connecting part (22), and the third connecting part (23) protrudes outwards towards the direction facing the connecting sheet (1) and is in surface contact with the first guide part (11).
8. The cylindrical battery top cap assembly according to claim 7, wherein: on the cross section of the pole (2), the third connecting part (23) and the second connecting part (22) are connected to form an inverted-V-shaped structure or an inverted-mountain-shaped structure.
9. A cylindrical battery top cap assembly according to claim 1, wherein: still include casing (3), casing (3) be provided with the mounting hole of utmost point post (2) looks adaptation, at least part holding of utmost point post (2) in the mounting hole, connection piece (1) set up in the inside of casing (3).
10. A cylindrical battery characterized in that: comprising a battery cell (5) and a top cover assembly as claimed in any one of claims 1 to 9, wherein one end of the battery cell (5) is in surface contact with one side of the connecting sheet (1) facing away from the pole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024837.4U CN219534809U (en) | 2023-01-04 | 2023-01-04 | Cylinder battery top cap subassembly and cylinder battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024837.4U CN219534809U (en) | 2023-01-04 | 2023-01-04 | Cylinder battery top cap subassembly and cylinder battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219534809U true CN219534809U (en) | 2023-08-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320024837.4U Active CN219534809U (en) | 2023-01-04 | 2023-01-04 | Cylinder battery top cap subassembly and cylinder battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219534809U (en) |
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2023
- 2023-01-04 CN CN202320024837.4U patent/CN219534809U/en active Active
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