CN219393645U - Cylindrical battery structure - Google Patents
Cylindrical battery structure Download PDFInfo
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- CN219393645U CN219393645U CN202320123663.7U CN202320123663U CN219393645U CN 219393645 U CN219393645 U CN 219393645U CN 202320123663 U CN202320123663 U CN 202320123663U CN 219393645 U CN219393645 U CN 219393645U
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- end plate
- negative electrode
- positive electrode
- positive
- battery
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- 238000003466 welding Methods 0.000 claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a cylindrical battery structure, and relates to the technical field of new energy batteries. The battery comprises a battery shell assembly and a battery core assembly, wherein the battery shell assembly comprises a metal shell and a positive electrode end plate, and a battery core accommodating cavity is formed in the metal shell; the positive end plate is provided with a positive pole column which is mutually insulated with the metal shell; the positive pole comprises a positive pole body, a first groove is formed in the positive pole body, a welding connecting sheet is formed at the bottom of the first groove, and the thickness of the welding connecting sheet is smaller than that of the positive pole body along the extending direction of the axial lead of the battery cell accommodating cavity; the battery cell assembly comprises a battery cell and an anode connecting piece, wherein the anode connecting piece is connected with the anode end of the battery cell in a laser welding mode, the anode connecting piece is provided with an anode connecting block, and the anode connecting block is connected with the welding connecting piece in a laser welding mode. The utility model can improve the overcurrent between the positive electrode end and the positive electrode post of the battery core, and is more suitable for high-rate charge and discharge power batteries.
Description
Technical Field
The utility model relates to the technical field of new energy batteries, in particular to a cylindrical battery structure.
Background
Along with the development of new energy industry, a new energy battery with high capacity and high multiplying power is a new direction of army of various lithium battery enterprises, at present, a material system with a larger expansion coefficient is adopted to achieve the above-mentioned aim, and is a feasible scheme, but when the material system is applied to a square battery cell, the expansion force of the battery cell is increased, and the defect of damage to a square battery cell structural member is directly caused. When the material system is applied to the cylindrical battery adopting the electrodeless ear technology, the high-capacity and high-multiplying power performance can be realized, meanwhile, the battery cells in the cylindrical battery are also of columnar structures, expansion forces can be mutually offset, and structural members cannot be damaged due to expansion of the battery cells. The CTC scheme can be better realized by the cylindrical battery cell, the scheme that the battery cell directly reaches the battery pack is realized by crossing the module layer, and the energy density of the whole battery pack can be further improved.
However, in the conventional cylindrical battery, the positive electrode end of the battery core is connected with the positive electrode end plate of the battery by a nickel strap, for example, in the patent with application number 200520129612.7, the patent name is a battery package for packaging the battery core and a battery using the package.
Disclosure of Invention
The present utility model is directed to a cylindrical battery structure, which solves the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a cylindrical battery structure, comprising a battery housing assembly, a cell assembly, wherein:
the battery shell assembly comprises a metal shell and a positive electrode end plate, and a battery core accommodating cavity is formed in the metal shell; the positive electrode end plate is provided with a riveting hole and a positive electrode column which is riveted in the riveting hole, and the positive electrode column and the metal shell are mutually insulated; the positive pole comprises a positive pole body, a first groove with an opening facing the battery cell accommodating cavity is formed in the middle of the positive pole body, a welding connecting sheet is formed at the bottom of the first groove, and the thickness of the welding connecting sheet is smaller than that of the positive pole body along the extending direction of the axial lead of the battery cell accommodating cavity;
the battery cell assembly is located in the battery cell accommodating cavity, the battery cell assembly comprises a battery cell and an anode connecting piece, the anode connecting piece is connected with the anode end of the battery cell in a laser welding mode, the anode connecting piece is provided with an anode connecting block protruding towards the direction of the anode end plate, the anode connecting block stretches into the first groove, and the anode connecting block is connected with the welding connecting piece in a laser welding mode.
Preferably, the positive electrode post body includes:
the cylinder penetrates through the positive electrode end plate, the first groove is formed in the middle of the cylinder, and the outer peripheral surface of the cylinder is insulated from the inner wall of the riveting hole;
the part of the cylinder, which is positioned at one side of the positive electrode end plate far away from the battery cell accommodating cavity, is provided with a first press edge, and the first press edge is overlapped with the positive electrode end plate and is provided with a first insulation structure;
the cylinder is located the positive electrode end plate towards the part of electric core appearance chamber one side is formed with the second blank holder, the second blank holder with overlap joint between the positive electrode end plate, and be equipped with second insulation structure and sealing member.
Preferably, a metal compression ring for protecting the first insulation structure from being crushed is arranged between the first pressing edge and the first insulation structure.
Preferably, the outer periphery of the metal pressing ring does not exceed the outer surface of the first pressing edge.
Preferably, in the positive electrode connecting sheet:
the positive connecting block and the positive connecting sheet are of an integrated structure; or,
the positive connecting block is connected with the positive connecting block in a laser welding mode.
Preferably, the middle part of the positive connection piece is provided with a through hole, the positive connection piece is provided with a boss protruding towards the direction of the battery cell, and the boss stretches into the through hole and is in welded connection with the positive connection piece.
Preferably, the positive electrode connecting sheet is provided with a plurality of curved slots so as to form a plurality of elastic warping sheet structures on the positive electrode connecting sheet.
Preferably, the battery shell assembly further comprises a negative electrode end plate assembly, and the battery cell assembly further comprises a negative electrode connecting sheet, wherein the negative electrode connecting sheet is connected with the negative electrode end of the battery cell by adopting laser welding, and the negative electrode connecting sheet is electrically connected with the metal shell; the negative electrode end plate assembly is arranged on the metal shell and is provided with a double-step counter sink hole matched with the sealing rubber particle and the sealing nail.
Preferably, the negative end plate assembly is located between the metal shell and the negative connection tab:
the negative electrode end plate assembly comprises a negative electrode end plate, the negative electrode end plate is electrically connected with the metal shell, and the negative electrode connecting sheet is connected with the negative electrode end plate through laser welding; or,
the negative electrode end plate assembly comprises a negative electrode end plate and a negative electrode column, the negative electrode connecting sheet is connected with the negative electrode column through laser welding, the negative electrode column is connected with the negative electrode end plate through laser welding, and the negative electrode end plate is connected with the metal shell through laser welding; or,
the negative electrode end plate assembly comprises a negative electrode end plate, two annular bending parts extending around the circumferential direction are arranged on the side wall of the metal shell to form annular protrusions and closing edges extending towards the protrusions of the axis direction of the battery cell accommodating cavity, the closing edges are located on one side of the positive electrode end plate, the edges of the negative electrode connecting sheets are lapped on one side surface of the annular protrusions, away from the closing edges, and are connected with the metal shell through laser welding, the negative electrode end plate is lapped on the inside of the closing edges and is fixedly connected with the metal shell, and the negative electrode end plates are mutually insulated with the metal shell through insulating parts.
Preferably, the negative electrode connecting piece exhaust hole, the bending groove and the fusing part; the negative electrode end plate is provided with reinforcing ribs and anti-explosion valve nicks.
Compared with the prior art, the utility model has the beneficial effects that:
this cylinder battery structure has following advantage:
in this cylinder battery structure, in the battery case subassembly, the positive pole post passes through riveting mode seal fixation on the positive pole end plate, and pass through laser welding mode between the positive pole connection piece in the battery core subassembly and the positive pole end of electric core, and pass through laser welding connection between the welding connection piece that positive connection piece on the positive pole connection piece and positive pole post had between positive connection piece, because in the positive pole post, the middle part of positive pole post body is formed with the first recess of opening towards electric core appearance chamber, the tank bottom part of first recess forms the welding connection piece, and then, the thickness of welding connection piece is less than the thickness of positive pole post body, and its top surface can be with the tank bottom direct contact of first recess after the positive connection piece stretches into in the first recess, be convenient for realize through laser welding welded mode connection between welding connection piece and the positive connection piece. Among the above-mentioned technical scheme, connect through the positive connection piece between the positive terminal of positive terminal and electric core, and all connect through laser welding welded mode between positive connection piece and positive terminal and the electric core positive terminal, can improve the overcurrent between positive terminal and the positive terminal of electric core, be applicable to the power battery of high multiplying power charge and discharge more.
Drawings
Fig. 1 is a schematic structural view of a cylindrical battery structure according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of an installation structure between a positive electrode post and a battery core assembly in a battery case assembly in a cylindrical battery structure according to an embodiment of the present utility model;
fig. 3 is a schematic cross-sectional view of a positive electrode connection sheet in a cylindrical battery structure according to an embodiment of the present utility model;
fig. 4 is a top view of a positive electrode tab in a cylindrical battery structure according to an embodiment of the present utility model;
fig. 5 is a schematic view of an installation structure between a negative electrode end plate and a metal casing and between battery cells in a cylindrical battery structure according to an embodiment of the present utility model;
fig. 6 is a schematic view of an installation structure between a negative electrode end plate and a metal casing and between battery cells in a cylindrical battery structure according to another embodiment of the present utility model;
fig. 7 is a schematic view of an installation structure between a negative electrode end plate and a metal casing and between battery cells in a cylindrical battery structure according to another embodiment of the present utility model.
In the figure: 1. a battery housing assembly; 11. a metal housing; 12. a positive electrode end plate; 13. a positive electrode post; 131. a first groove; 1311. welding a connecting sheet; 132. a cylinder; 133. a first blank holder; 134. a second blank holder; 135. a second groove; 14. a metal pressure ring; 151. a first insulating structure; 152. a second insulating structure; 16. a seal; 17. a negative end plate; 171. a double-step counter sinking hole; 172. a negative electrode column; 2. a cell assembly; 21. a battery cell; 22. a positive electrode connecting sheet; 221. an anode connecting block; 2211. a boss; 222. a through hole; 223. slotting; 224. a warp sheet structure; 23. a negative electrode connecting sheet; 3. sealing the colloidal particles; 4. and (5) sealing the nails.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be 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.
Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.
As shown in fig. 1 and 2, the present utility model provides a technical solution: a cylindrical battery structure comprising a battery housing assembly 1 and a cell assembly 2, wherein in particular as shown in fig. 2:
in the battery case assembly 1, the battery case assembly 1 comprises a metal case 11 and a positive electrode end plate 12, wherein a battery cell accommodating cavity is formed in the metal case 11; the positive end plate 12 is provided with a riveting hole and a positive pole 13 riveted in the riveting hole, and the positive pole 13 and the metal shell 11 are mutually insulated; the positive pole 13 comprises a positive pole body, a first groove 131 with an opening facing the battery cell containing cavity is formed in the middle of the positive pole body, a welding connecting sheet 1311 is formed at the bottom of the first groove 131, and the thickness of the welding connecting sheet 1311 is smaller than that of the positive pole body along the axial lead extending direction of the battery cell containing cavity;
in the battery cell assembly 2, the battery cell assembly 2 is located in the battery cell accommodating cavity, the battery cell assembly 2 comprises a battery cell 21 and an anode connecting sheet 22, the anode connecting sheet 22 and the anode end of the battery cell 21 are connected in a laser welding mode, the anode connecting sheet 22 is provided with an anode connecting block 221 protruding towards the direction of an anode end plate, the anode connecting block 221 stretches into the first groove 131, and the anode connecting block 221 and the welding connecting sheet 1311 are connected in a laser welding mode.
In the cylindrical battery structure, in the battery case assembly 1, a positive electrode post 13 is fixed on a positive electrode end plate 12 in a sealing manner in a riveting manner, the positive electrode post 13 and the positive electrode end plate 12 are mutually insulated, a positive electrode connecting sheet 22 in the battery core assembly is connected with a positive electrode end of a battery core 21 in a laser welding manner, the positive electrode connecting sheet 22 and the positive electrode post 13 are connected with a welding connecting sheet 1311 of the positive electrode post 13 through a positive electrode connecting sheet 221 on the positive electrode connecting sheet 22 in a laser welding manner, since a first groove 131 with an opening facing a battery core accommodating cavity is formed in the middle of the positive electrode post 13, the groove bottom part of the first groove 131 forms the welding connecting sheet 1311, and furthermore, the thickness of the welding connecting sheet 1311 is smaller than that of the positive electrode post body, in a specific implementation process, in order to further reduce the thickness of the welding connecting sheet 1311, a second groove 135 with an opening far from the side of the battery core accommodating cavity can be arranged on the positive electrode post body, as shown in fig. 2; after the positive connection block 221 on the positive connection block 22 extends into the first groove 1311, the top surface of the positive connection block 221 can be in direct contact with the bottom surface of the first groove 1311, that is, the top surface of the positive connection block 221 can be in direct contact with the welding connection block 1311, so that an operator can conveniently connect the welding connection block 1311 with the positive connection block 221 in a laser welding manner. In the above technical scheme, the positive electrode post 13 is connected with the positive electrode end of the battery cell 21 through the positive electrode connecting sheet 22, and the positive electrode connecting sheet 22 is connected with the positive electrode post 13 and the positive electrode end of the battery cell 21 through the laser welding mode, so that the overcurrent between the positive electrode end of the battery cell 21 and the positive electrode post 13 can be improved, and the battery cell is more suitable for high-rate charge and discharge power batteries.
In a specific implementation manner, the positive electrode post 13 may include a cylinder 132, a first pressing edge 133 and a second pressing edge 134, where the cylinder 132 penetrates through a riveting hole provided in the positive electrode end plate 12, the first groove 131 is formed in the middle of the cylinder 132, the outer circumferential surface of the cylinder 132 and the inner wall of the riveting hole are insulated from each other, specifically, as shown in fig. 2, the outer diameter of the cylinder 132 is smaller than the diameter of the riveting hole, and a gap a is formed between the outer surface of the cylinder 132 and the inner wall of the riveting hole;
the portion of the cylinder 132 located at the side of the positive electrode end plate 12 far from the battery cell accommodating cavity is formed with the first pressing edge 133, and the first pressing edge 133 is overlapped with the positive electrode end plate 12 and is provided with a first insulation structure 151;
the portion of the cylinder 133 located on the side of the positive electrode end plate 12 facing the cell cavity is formed with a second press edge 134, and the second press edge 134 overlaps the positive electrode end plate 12, and is provided with a second insulation structure 152 and a sealing member 14.
In the above cylindrical battery structure, in the battery case assembly 1, good fixed connection and insulating sealing performance can be achieved between the positive electrode end plate 12 and the positive electrode post 13 through the above specific structure.
Of course, further, when the positive electrode post 13 and the positive electrode end plate 12 are matched by adopting the above embodiment, in order to prevent the positive electrode post 13 from crushing the first insulating structure 151 in the riveting forming process, a metal compression ring 14 for protecting the first insulating structure 151 from being crushed may be disposed between the first pressing edge 133 of the positive electrode post 13 and the first insulating structure 151.
Preferably, the outer periphery of the metal pressure ring 14 does not extend beyond the outer surface of the first pressure side 133 in order to enhance the overall aesthetic appearance of the cylindrical battery structure.
On the basis of the cylindrical battery structure provided in each of the above embodiments, in the positive electrode connecting sheet:
in a specific embodiment, the positive connection block 221 and the positive connection piece 22 may have an integral structure, and specifically, the positive connection piece 22 may be formed by stamping the positive connection piece 22 through a sheet metal stamping process, or may be formed through other processes.
In another embodiment, as shown in fig. 3, the positive connection block 221 and the positive connection block 22 are connected by laser welding.
Preferably, the middle part of the positive electrode connecting piece 22 is provided with a through hole 222, the positive electrode connecting piece 221 is provided with a boss 2211 protruding towards the direction of the battery cell 21, the boss 2211 extends into the through hole 222, and the boss 2211 is welded with the positive electrode connecting piece 22.
The above two specific implementations of the positive connection block 221 on the positive connection piece 22 are given, and of course, other implementations may be specifically adopted, and only the overcurrent between the positive connection piece and the positive post needs to be ensured, which is not described herein.
In a specific embodiment, in order to improve compatibility of the mating dimension between the battery core 21 and the positive electrode post 13 and stability of the overall structure of the cylindrical battery structure, in the above cylindrical battery structure, a plurality of curved slots 223 are formed on the positive electrode connecting piece 22 so as to form a plurality of elastic buckling piece structures 224 on the positive electrode connecting piece 22. In a specific use process, the elastic warping sheet structure 224 can deform relative to other areas, the distance error between the battery cell 21 and the positive pole 13 can be increased by deforming the warping sheet structure 224, and meanwhile, after the grooves 223 are formed and the warping sheet structure 224 is warped, gaps can be formed between the battery cell 21 and the positive pole end plate 12, so that heat dissipation and the like are facilitated; in addition, the warping sheet structure 224 can have a spring-like action after warping, and can buffer the space between the cell 21 and the positive electrode end plate 12, thereby improving the stability of the overall structure of the cylindrical battery.
On the basis of the cylindrical battery structure provided in the above embodiments, please refer to fig. 5, 6 and 7, the battery case assembly 1 further includes a negative electrode end plate assembly, the battery cell assembly 2 further includes a negative electrode connecting piece 23, wherein the negative electrode connecting piece 23 is connected with the negative electrode end of the battery cell 21 by laser welding, and the negative electrode connecting piece 23 is electrically connected with the metal case 11; the negative end plate assembly is mounted to the metal housing 11 and is provided with a double stepped counter bore 171 for mating with the seal bead 3 and seal nail 4.
The negative electrode connecting piece 23 is connected with the negative electrode end of the battery core 21 by adopting a laser welding mode, so that the performance of the cylindrical battery can be further improved.
Preferably, the negative end plate assembly may be engaged with the metal shell 11 and the negative connecting piece 23 in a variety of ways, specifically:
in a first mode of the present utility model,
as shown in fig. 5, the negative end plate assembly includes a negative end plate 17, the negative end plate 17 is electrically connected with the metal housing 11, and a negative connecting piece 23 is connected with the negative end plate 17 by laser welding; more specifically, the negative electrode end plate 17 and the metal case 11 may be connected by laser welding.
In the second mode, the first mode is adopted,
as shown in fig. 6, the negative end plate assembly includes a negative end plate 17 and a negative post 172, the negative connecting piece 23 is connected with the negative post 172 by laser welding, the negative post 172 is connected with the negative end plate 17 by laser welding, and the negative end plate 23 is connected with the metal casing 11 by laser welding.
In a third mode of operation, the first and second modes,
as shown in fig. 7, the negative electrode end plate assembly includes a negative electrode end plate 17, two annular bends extending around the circumferential direction are provided on the side wall of the metal casing 11 to form an annular protrusion 111 extending toward the axial direction of the battery cell cavity and a closing edge 112, the closing edge 112 is located at one side of the annular protrusion 111 away from the positive electrode end plate 12, the edge of the negative electrode connecting sheet 23 is lapped on one side surface of the annular protrusion 111 away from the closing edge 11 and is connected with the metal casing 11 by laser welding, the negative electrode end plate 17 is lapped in the closing edge 112 and is fixedly connected with the metal casing 11, and the negative electrode end plate 17 and the metal casing 11 are mutually insulated by an insulating part 18.
In a preferred embodiment, in order to improve the safety of the cylindrical battery structure during use, the negative electrode connection piece 23 is provided with an exhaust hole, a bending groove and a fusing part; and the negative end plate 23 is provided with reinforcing ribs and explosion-proof valve scores.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a cylinder battery structure which characterized in that includes battery case subassembly, electric core subassembly, wherein:
the battery shell assembly comprises a metal shell and a positive electrode end plate, and a battery core accommodating cavity is formed in the metal shell; the positive electrode end plate is provided with a riveting hole and a positive electrode column which is riveted in the riveting hole, and the positive electrode column and the metal shell are mutually insulated; the positive pole comprises a positive pole body, a first groove with an opening facing the battery cell accommodating cavity is formed in the middle of the positive pole body, a welding connecting sheet is formed at the bottom of the first groove, and the thickness of the welding connecting sheet is smaller than that of the positive pole body along the extending direction of the axial lead of the battery cell accommodating cavity;
the battery cell assembly is located in the battery cell accommodating cavity, the battery cell assembly comprises a battery cell and an anode connecting piece, the anode connecting piece is connected with the anode end of the battery cell in a laser welding mode, the anode connecting piece is provided with an anode connecting block protruding towards the direction of the anode end plate, the anode connecting block stretches into the first groove, and the anode connecting block is connected with the welding connecting piece in a laser welding mode.
2. The cylindrical battery structure of claim 1, wherein the positive electrode post body comprises:
the cylinder penetrates through the positive electrode end plate, the first groove is formed in the middle of the cylinder, and the outer peripheral surface of the cylinder is insulated from the inner wall of the riveting hole;
the part of the cylinder, which is positioned at one side of the positive electrode end plate far away from the battery cell accommodating cavity, is provided with a first press edge, and the first press edge is overlapped with the positive electrode end plate and is provided with a first insulation structure;
the cylinder is located the positive electrode end plate towards the part of electric core appearance chamber one side is formed with the second blank holder, the second blank holder with overlap joint between the positive electrode end plate, and be equipped with second insulation structure and sealing member.
3. The cylindrical battery structure according to claim 2, wherein a metal pressure ring for protecting the first insulating structure from being crushed is provided between the first pressure side and the first insulating structure.
4. A cylindrical battery structure according to claim 3, wherein the outer periphery of the metal pressure ring does not extend beyond the outer surface of the first pressure side.
5. The cylindrical battery structure of claim 1, wherein in the positive electrode tab:
the positive connecting block and the positive connecting sheet are of an integrated structure; or,
the positive connecting block is connected with the positive connecting block in a laser welding mode.
6. The cylindrical battery structure according to claim 5, wherein a through hole is formed in the middle of the positive electrode connecting piece, a boss protruding toward the direction of the battery cell is arranged on the positive electrode connecting piece, the boss extends into the through hole, and the boss is welded with the positive electrode connecting piece.
7. The cylindrical battery structure of claim 5, wherein the positive electrode tab is provided with a plurality of curved slots to allow for a plurality of resilient warping tab structures to be formed on the positive electrode tab.
8. The cylindrical battery structure of any one of claims 1-7, wherein the battery housing assembly further comprises a negative end plate assembly, the cell assembly further comprises a negative connecting piece, wherein the negative connecting piece is connected to the negative end of the cell by laser welding, and the negative connecting piece is electrically connected to the metal housing; the negative electrode end plate assembly is arranged on the metal shell and is provided with a double-step counter sink hole matched with the sealing rubber particle and the sealing nail.
9. The cylindrical battery structure of claim 8, wherein the negative end plate assembly is between the metal housing and the negative connecting tab:
the negative electrode end plate assembly comprises a negative electrode end plate, the negative electrode end plate is electrically connected with the metal shell, and the negative electrode connecting sheet is connected with the negative electrode end plate through laser welding; or,
the negative electrode end plate assembly comprises a negative electrode end plate and a negative electrode column, the negative electrode connecting sheet is connected with the negative electrode column through laser welding, the negative electrode column is connected with the negative electrode end plate through laser welding, and the negative electrode end plate is connected with the metal shell through laser welding; or,
the negative electrode end plate assembly comprises a negative electrode end plate, two annular bending parts extending around the circumferential direction are arranged on the side wall of the metal shell to form annular protrusions and closing edges extending towards the protrusions of the axis direction of the battery cell accommodating cavity, the closing edges are located on one side of the positive electrode end plate, the edges of the negative electrode connecting sheets are lapped on one side surface of the annular protrusions, away from the closing edges, and are connected with the metal shell through laser welding, the negative electrode end plate is lapped on the inside of the closing edges and is fixedly connected with the metal shell, and the negative electrode end plates are mutually insulated with the metal shell through insulating parts.
10. The cylindrical battery structure of claim 8, wherein the negative electrode tab vent, the bending groove, and the fusing part; the negative electrode end plate is provided with reinforcing ribs and anti-explosion valve nicks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320123663.7U CN219393645U (en) | 2023-01-12 | 2023-01-12 | Cylindrical battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320123663.7U CN219393645U (en) | 2023-01-12 | 2023-01-12 | Cylindrical battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219393645U true CN219393645U (en) | 2023-07-21 |
Family
ID=87189170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320123663.7U Active CN219393645U (en) | 2023-01-12 | 2023-01-12 | Cylindrical battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219393645U (en) |
-
2023
- 2023-01-12 CN CN202320123663.7U patent/CN219393645U/en active Active
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