CN115117566A - Pole lug connecting structure of cylindrical battery and cylindrical battery - Google Patents
Pole lug connecting structure of cylindrical battery and cylindrical battery Download PDFInfo
- Publication number
- CN115117566A CN115117566A CN202210899468.3A CN202210899468A CN115117566A CN 115117566 A CN115117566 A CN 115117566A CN 202210899468 A CN202210899468 A CN 202210899468A CN 115117566 A CN115117566 A CN 115117566A
- Authority
- CN
- China
- Prior art keywords
- current collecting
- winding core
- cylindrical battery
- tab
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 76
- 238000003466 welding Methods 0.000 claims description 27
- 239000003792 electrolyte Substances 0.000 claims description 14
- 210000005069 ears Anatomy 0.000 claims 1
- 235000015110 jellies Nutrition 0.000 claims 1
- 239000008274 jelly Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a pole lug connecting structure of a cylindrical battery and the cylindrical battery, wherein the pole lug connecting structure of the cylindrical battery comprises a winding core, a pole piece and a current collecting disc, wherein the winding core is formed by winding the pole piece, the end part of the winding core is provided with a plurality of pole lugs, the pole lugs are distributed along the circumferential direction of the winding core and extend along the radial direction of the winding core, and the pole lugs are bent towards the axis of the winding core; and at least part of the lugs are welded and fixed on one side of the current collecting disc, which faces the winding core. The technical scheme of the invention can reduce the energy density of the cylindrical battery and improve the use safety of the cylindrical battery.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a lug connecting structure of a cylindrical battery and the cylindrical battery.
Background
The electric automobile replaces oil with electricity, can realize zero emission and low noise of polluted gas, and is an important means for solving the problems of energy and environment. With the strong support of the country for new energy vehicles, cylindrical batteries are receiving attention due to the advantages of high energy density, high compression coefficient, low cost, high production efficiency, good safety performance and the like.
The lug in the present cylinder battery adopts the scheme of rubbing flat more and carries out full utmost point ear welding, nevertheless rubs the flat in-process and probably produces metal flying chip, has the potential safety hazard that is difficult to avoid, and occupies more radial space, leads to energy density to reduce.
Disclosure of Invention
The invention mainly aims to provide a pole lug connecting structure of a cylindrical battery, aiming at improving the use safety of the cylindrical battery while reducing the energy density of the cylindrical battery.
In order to achieve the above object, the present invention provides a tab connection structure of a cylindrical battery, including:
the winding core is formed by winding the pole piece, a plurality of lugs are arranged at the end part of the winding core, the lugs are distributed along the circumferential direction of the winding core and extend along the radial direction of the winding core, and the lugs are bent towards the axis of the winding core; and the number of the first and second groups,
and the plurality of tabs are at least partially welded and fixed on one side of the current collecting disc, which faces the winding core.
Optionally, the pole piece has a first section and a second section connected to each other, the first section is wound to form the winding core, and the second section is cut along a circumferential direction thereof to form a plurality of tabs.
Optionally, the length of the tab is less than or equal to 15 mm; and/or the width of the tab is less than or equal to 15 mm.
Optionally, a current collecting portion is arranged on the current collecting disc, the plurality of tabs include first tabs welded and fixed with the current collecting portion and second tabs provided with first through holes, the current collecting disc is provided with second through holes corresponding to the first through holes, and the second through holes are communicated with the first through holes and used for facilitating electrolyte to flow into the winding core.
Optionally, the second tab is provided with a plurality of the first through holes, the plurality of the first through holes are arranged at intervals along the extending direction of the length and/or the width of the second tab, and the current collecting disc is correspondingly provided with a plurality of the second through holes; and/or the presence of a gas in the gas,
a plurality of all seted up on the second utmost point ear first through-hole, just the second utmost point ear is followed the circumference interval of rolling up the core arranges, correspond on the current collecting dish the second through-hole is followed the circumference interval of rolling up the core arranges.
Optionally, a force applying portion is further disposed on the collecting tray, the force applying portion protrudes from one side away from the winding core, and the second through hole is formed in the force applying portion.
Optionally, the axle center on the current collecting disc is equipped with the connection position, effort portion with current collecting portion all is located the periphery of connection position, the connection position orientation is kept away from roll up one side protrusion setting of core for connect utmost point post.
Optionally, the diameter of the first through hole is greater than or equal to 0.5mm and less than or equal to 2 mm; and/or the presence of a gas in the gas,
the welding tracks between the current collecting part and the first tab are various.
Optionally, a surface embossing treatment of the current collecting disc; and/or the presence of a gas in the gas,
the thickness of the current collecting disc is less than or equal to 0.2 mm.
The invention also provides a cylindrical battery, which comprises a cylindrical shell, a cover plate, a pole and the pole lug connecting structure of the cylindrical battery, wherein the current collecting disc and the winding core are arranged in the cylindrical shell, the cover plate covers two ends of the cylindrical shell, and the pole is connected to the connecting position of the current collecting disc.
According to the technical scheme, the winding core and the pole pieces are reset, the winding core is formed by winding the pole pieces, and the pole lugs formed by partial pole pieces at the end part of the winding core are cut by a cutting process to form a plurality of pole lugs, so that the pole lugs are distributed along the circumferential direction of the winding core and extend along the radial direction of the winding core, and the pole lugs are all bent towards the axis of the winding core. Because the cutting process is performed before the rolling and folding process, the possibility of generating metal flying chips is reduced, and the safety risk of the battery in the production process is reduced. And compare in rubbing flat technology, this scheme is more regular makes utmost point ear laminate layer upon layer between current collection dish and book core, consequently can reduce the axial space that utmost point ear was occupied to the welding stability of current collection dish and utmost point ear is improved. Therefore, the energy density of the cylindrical battery is reduced, and the use safety of the cylindrical battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pole piece in an embodiment of a tab connection structure of a cylindrical battery according to the present invention;
fig. 2 is a schematic structural view of the tab of fig. 1 after being rolled and folded;
fig. 3 is a schematic structural view of the processed tab in fig. 1;
FIG. 4 is an angled view of the current collector disk of FIG. 1;
FIG. 5 is a schematic view of another angular configuration of the collector plate of FIG. 1;
fig. 6 is a schematic view illustrating a tab according to another embodiment of the tab connection structure of the cylindrical battery according to the present invention;
fig. 7 is a schematic structural view of a current collecting disk in a further embodiment of a tab connection structure of a cylindrical battery according to the present invention;
fig. 8 is a schematic structural view of a current collecting plate in a further embodiment of a tab connection structure of a cylindrical battery according to the present invention.
The reference numbers indicate:
| reference numerals | Name (R) | Reference numerals | Name(s) |
| 10 | |
14 | |
| 11 | |
20 | |
| 12 | Tab for fixing a |
21 | |
| 121 | |
22 | Second through |
| 122 | |
23 | |
| 123 | First through |
24 | |
| 13 | First stage |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like under a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a pole ear 12 connecting structure of a cylindrical battery.
In the embodiment of the present invention, as shown in fig. 1 to 4, the tab 12 connection structure of the cylindrical battery includes a winding core 10, a pole piece 11 and a current collecting tray 20, the winding core 10 is formed by winding the pole piece 11, and the end of the winding core 10 is provided with a plurality of tabs 12, the plurality of tabs 12 are arranged along the circumferential direction of the winding core 10 and extend along the radial direction of the winding core 10, and the tabs 12 are all bent toward the axis of the winding core 10; a plurality of tabs 12 are at least partially welded to the collecting tray 20 on the side facing the reeling core 10.
In the prior art, the tab 12 of the cylindrical battery is usually processed by a rubbing process, so that the tab 12 is tightly attached between the winding core 10 and the current collecting disc 20, and the stability of the welding process is ensured. However, in the flattening process, metal flying chips are easily generated, and once the metal flying chips fall into the electrolyte, the cylindrical battery is easily short-circuited, so that the installation risk is high. And more axial space is occupied, and the overall energy density of the cylindrical battery is reduced. Therefore, the rolling process is adopted in the scheme, the possibility of short circuit of the cylindrical battery is effectively reduced, and the overall energy density of the cylindrical battery is improved. Referring to fig. 2 and 3, in the winding process, the tab 12 before the pole piece 11 is wound to form the winding core 10 is cut into a plurality of tabs 12, the plurality of tabs 12 are sequentially bent towards the axis of the winding core 10 while the pole piece 11 is wound to form the winding core 10, and a hollow cylinder is sleeved in a central hole of the winding core 10, so that the winding core 10 is protected, the entering of metal flying chips is reduced, and the safety risk is reduced; on the other hand, functions to support the core 10. Compared with the kneading process, the scheme has the advantages that the pole lugs 12 are attached between the current collecting disc 20 and the winding core 10 layer by layer more regularly, so that the axial space occupied by the pole lugs 12 can be reduced, and the welding stability of the current collecting disc 20 and the pole lugs 12 is improved.
According to the technical scheme, the winding core 10 and the pole pieces 11 are reset, the winding core 10 is formed by winding the pole pieces 11, and the pole lugs 12 formed by the pole pieces 11 at the end part of the winding core 10 are cut by a cutting process to form a plurality of pole lugs 12, so that the pole lugs 12 are distributed along the circumferential direction of the winding core 10 and extend along the radial direction of the winding core 10, and the pole lugs 12 are bent towards the axis of the winding core 10. Because the cutting process is performed before the rolling and folding process, the possibility of generating metal flying chips is reduced, and the safety risk of the battery in the production process is reduced. Compared with the kneading process, the scheme has the advantages that the pole lugs 12 are attached between the current collecting disc 20 and the winding core 10 layer by layer more regularly, so that the axial space occupied by the pole lugs 12 can be reduced, and the welding stability of the current collecting disc 20 and the pole lugs 12 is improved. Therefore, the energy density of the cylindrical battery is reduced, and the use safety of the cylindrical battery is improved.
Specifically, the pole piece 11 has a first section 13 and a second section 14 connected to each other, the first section 13 is wound to form a winding core 10, and the second section 14 is cut along the circumferential direction thereof to form a plurality of tabs 12. Referring to fig. 1 to 3, the pole piece 11 generally includes a positive pole piece, a negative pole piece, and an insulation sheet disposed between the positive pole piece and the negative pole piece to ensure insulation therebetween. The overlapping part of the positive plate 11 and the negative plate 11, namely the first section 13, is coiled together to form a coiled core 10, the non-overlapping part, namely the second section 14, is respectively and convexly arranged at two ends of the coiled core 10 and forms a plurality of tabs 12 through a cutting process so as to be welded and fixed with the current collecting disc 20, and therefore the multi-tab 12 or the full-tab 12 is welded.
In one embodiment, the length of the tab 12 is less than or equal to 15 mm. Specifically, referring to fig. 1, the length of the tab 12 is L, and the length direction of the tab 12 is the axial direction of the winding core 10. If the length of utmost point ear 12 is greater than 15mm, the length overlength of utmost point ear 12 has reduced the maneuverability of book on the one hand, and on the other hand makes the utmost point ear 12 thickness after the book of increase, increases the circumference space of cylindrical battery, reduces the axial energy density of cylindrical battery.
In another embodiment, the width of the tab 12 is less than or equal to 15 mm. Specifically, referring to fig. 1, the width of the tab 12 is D, and the width direction of the tab 12 is the circumferential direction of the winding core 10. If the width of the tab 12 is larger than 15mm, the width of the tab 12 is too wide, so that the operability of winding and folding is reduced on one hand, and on the other hand, the bending straight line segment at the turning part of the tab 12 is too long, which is not beneficial to the installation of the winding core 10.
In order to further facilitate the electrolyte to permeate into the winding core 10, in an embodiment, referring to fig. 1 to 5 in combination, a current collecting portion 21 is disposed on the current collecting plate 20, the plurality of tabs 12 includes a first tab 121 welded and fixed to the current collecting portion 21 and a second tab 122 having a first through hole 123, a second through hole 22 is disposed on the current collecting plate 20 corresponding to the first through hole, and the second through hole 22 communicates with the first through hole 123 for facilitating the electrolyte to flow into the winding core 10. Specifically, the flattened tabs 12 are piled up, so that difficulty in penetration of electrolyte into the winding core 10 is increased, the overall wettability of the winding core 10 is poor, and the probability of lithium precipitation in the subsequent working process is increased. Therefore, the plurality of tabs 12 include a first tab 121 and a second tab 122, the first tab 121 is welded and fixed to the current collecting portion 21, the second tab 122 is provided with a second through hole 22, the corresponding current collecting tray 20 is provided with a second through hole 22, and the second through hole 22 is communicated with the first through hole 123. Increase the infiltration passageway of electrolyte for inside electrolyte loops through second through-hole 22 and first through-hole 123 inflow core 10, thereby promoted the permeability and the homogeneity of electrolyte in core 10, reduced the safety risk of battery in process of production.
Further, referring to fig. 3 and fig. 6, a plurality of first through holes 123 are formed in the second tab 122, the plurality of first through holes 123 are arranged at intervals along the extending direction of the length and/or the width of the second tab 122, and a plurality of second through holes 22 are correspondingly formed in the current collecting plate 20. Referring to fig. 6, 8 first through holes 123 are formed in the second tab 122, and the 8 first through holes 123 are arranged in 4 rows and 2 rows in an array manner on the same first tab 121, so that a permeation channel of electrolyte is further increased, the permeation and uniformity of the electrolyte in the roll core 10 are improved, and the safety risk of the battery in the production process is reduced. The corresponding current collecting plate 20 is also provided with 8 through holes.
In another embodiment, referring to fig. 3 to 8, a plurality of second tabs 122 are each provided with a first through hole 123, and the second tabs 122 are arranged at intervals along the circumferential direction of the roll 10, and the corresponding second through holes 22 on the current collecting disc 20 are arranged at intervals along the circumferential direction of the roll 10. Particularly, the permeation channel of the electrolyte is further increased, the permeation and the uniformity of the electrolyte in the roll core 10 are improved, and the safety risk of the battery in the production process is reduced.
In one embodiment, the diameter of the first through hole 123 is greater than or equal to 0.5mm and less than or equal to 2 mm. Specifically, if the diameter of the first through hole 123 is smaller than 0.5mm, the diameter of the first through hole 123 is too small to facilitate the electrolyte to pass through; if the diameter of the first through hole 123 is larger than 2mm, the diameter of the first through hole 123 is too large, on one hand, the winding core 10 is exposed, on the other hand, the welding space between the tab 12 and the current collecting disc 20 is excessively occupied, and the welding of the full tab 12 is not facilitated.
The diameter of the first through hole 123 may be 0.5mm, 1mm, 1.5mm, 2mm, or the like. Of course, in other embodiments, the diameter of the first through hole 123 may be larger than 2mm, or smaller than 0.5 mm.
In one embodiment, the welding trace between the current collecting portion 21 and the first tab 121 is various. Specifically, referring to fig. 4, the welding trace between the current collecting portion 21 and the first tab 121 may extend in the circumferential direction of the current collecting portion 21, or extend in the radial direction of the current collecting portion 21, or be spiral or otherwise irregular on the current collecting portion 21. In this embodiment, the welding locus between the current collecting portion 21 and the first tab 121 is a point, and the number of welding points is greater than or equal to 20 and less than or equal to 80. In other embodiments, the tracks may be linear tracks.
Referring to fig. 1 to 8, in order to facilitate the welding and positioning between the current collecting portion 21 and the first tab 121, the current collecting plate 20 is further provided with a force applying portion 23, the force applying portion 23 protrudes to a side away from the winding core 10, and the second through hole 22 is opened on the force applying portion 23. Specifically, when welding the current collecting portion 21 and the first tab 121, a tooling fixture on a welding device can be pressed on the force applying portion 23, so that the force applying point during welding is increased, on one hand, the current collecting portion 21 and the tab 12 are ensured to be tightly attached, on the other hand, the direct action of the welding device on the current collecting portion 21 is reduced, the current collecting plate 20 is deformed, and the welding is positioned.
Furthermore, in an embodiment, the axial center of the collecting tray 20 is provided with a connecting position 24, the force application part 23 and the collecting part 21 are both located at the periphery of the connecting position 24, and the connecting position 24 is protruded toward the side away from the winding core 10 for connecting the pole. Specifically, the connection position 24 is used for being welded and fixed with the pole, and the connection position 24 is arranged towards the one side far away from the winding core 10 in a protruding manner, so that the pole and the current collecting plate 20 can be conveniently welded, and the current collecting part 21 and the first pole lug 121 are positioned during welding, and the welding only needs to be welded to the outer peripheral edge of the connection position 24. In general, the positive current collecting plate 20 is connected to the post, and the negative current collecting plate 20 does not need to be connected to the post, so that the connection position 24 may not be provided when the current collecting plate 20 is used as the negative current collecting plate 20.
In one embodiment, the thickness of the collector plate 20 is less than or equal to 0.2 mm. Specifically, the thickness of the current collecting plate 20 is reduced as much as possible on the premise that the structural strength of the current collecting plate 20 is required to be satisfied during the welding process. If the thickness of the current collecting plate 20 is greater than 0.2mm, and the thickness of the current collecting plate 20 is too thick, the axial space of the cylindrical battery is occupied, and the axial energy density of the cylindrical battery is increased. Of course, in other embodiments, the thickness of the collector plate 20 may be greater than 0.2 mm.
Further, the current collecting portion 21 is embossed on the side away from the tab 12. On one hand, the structural strength of the current collecting disc 20 is enhanced, welding of the current collecting disc 20 and the pole lug 12 is facilitated, and on the other hand, the current collecting disc 20 is positioned during welding, so that the laser absorption efficiency during laser welding is improved, the welding difficulty is reduced, and the welding efficiency is improved. The entire surface of the current collecting plate 20 may be embossed, or only the current collecting portion 21 on the side away from the tab 12 may be embossed.
The invention further provides a cylindrical battery, which comprises a cylindrical shell, a cover plate, a pole and a pole lug 12 connecting structure of the cylindrical battery, the specific structure of the pole lug 12 connecting structure of the cylindrical battery refers to the embodiments, and the cylindrical battery adopts all the technical schemes of all the embodiments, so that the cylindrical battery at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated. The current collecting disc 20 and the winding core 10 are both arranged in a cylindrical shell, the cover plates cover two ends of the cylindrical shell, and the pole is connected to a connecting position 24 of the current collecting disc 20. Specifically, the two current collecting discs 20 and the two ends of the winding core 10 are both arranged in the tab 12 connection structure and are both arranged inside the cylindrical shell, and the two current collecting discs are divided into a positive electrode and a negative electrode, the two ends of the cylindrical shell are covered by the two cover plates, and the pole is connected to the connection position 24 of the positive current collecting disc 20.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A tab connection structure of a cylindrical battery, comprising:
the winding core comprises a winding core (10) and a pole piece (11), wherein the winding core (10) is formed by winding the pole piece (11), a plurality of tabs (12) are arranged at the end part of the winding core (10), the tabs (12) are distributed along the circumferential direction of the winding core (10) and extend along the radial direction of the winding core (10), and the tabs (12) are bent towards the axis of the winding core (10); and the number of the first and second groups,
the current collecting disc (20) is characterized in that at least part of the lugs (12) are welded and fixed on one side, facing the winding core (10), of the current collecting disc (20).
2. The tab connection structure of a cylindrical battery according to claim 1, wherein the pole piece (11) has a first section (13) and a second section (14) connected to each other, the first section (13) is wound to form the jelly roll (10), and the second section (14) is cut in a circumferential direction thereof to form a plurality of the tabs (12).
3. The tab connection structure of a cylindrical battery according to claim 1, wherein the length of the tab (12) is less than or equal to 15 mm; and/or the width of the tab (12) is less than or equal to 15 mm.
4. The pole ear connection structure of the cylindrical battery as claimed in claim 1, wherein the current collecting plate (20) is provided with a current collecting portion (21), the plurality of pole ears (12) comprises a first pole ear (121) welded and fixed with the current collecting portion (21) and a second pole ear (122) provided with a first through hole (123), the current collecting plate (20) is provided with a second through hole (22) corresponding to the first through hole (123), and the second through hole (22) is communicated with the first through hole (123) for facilitating the electrolyte to flow into the winding core (10).
5. The tab connection structure of cylindrical batteries according to claim 4, wherein the second tab (122) is provided with a plurality of first through holes (123), the plurality of first through holes (123) are arranged at intervals along the extension direction of the length and/or width of the second tab (122), and the collecting tray (20) is correspondingly provided with a plurality of second through holes (22); and/or the presence of a gas in the gas,
a plurality of all seted up on second utmost point ear (122) first through-hole (123), just second utmost point ear (122) are followed roll up the circumference interval of core (10) and arrange, correspond on current collecting dish (20) second through-hole (22) are followed roll up the circumference interval of core (10) and arrange.
6. The tab connection structure of a cylindrical battery according to claim 4, wherein the current collecting disk (20) is further provided with a force applying portion (23), the force applying portion (23) is protruded to a side away from the winding core (10), and the second through hole (22) is opened on the force applying portion (23).
7. The pole ear connection structure of the cylindrical battery as claimed in claim 6, wherein the axial center of the current collecting disc (20) is provided with a connection position (24), the force application part (23) and the current collecting part (21) are both located at the periphery of the connection position (24), and the connection position (24) is arranged to protrude towards one side far away from the winding core (10) for connecting a pole.
8. The tab connection structure of a cylindrical battery according to claim 4, wherein the first through-hole (123) has a diameter of 0.5mm or more and 2mm or less; and/or the presence of a gas in the gas,
the welding tracks on the current collecting part (21) and between the first tab (121) are various.
9. The tab connection structure of a cylindrical battery according to any one of claims 1 to 8, wherein the surface of the current collecting plate (20) is embossed; and/or the presence of a gas in the gas,
the thickness of the collecting disc (20) is less than or equal to 0.2 mm.
10. The utility model provides a cylindrical battery, its characterized in that, including cylinder casing, apron, utmost point post and according to any one of claims 1 to 9 the utmost point ear connection structure of cylindrical battery, current collection dish (20) with roll core (10) and all locate in the cylinder casing, the apron lid closes the both ends of cylinder casing, utmost point post connect in connect position (24) of current collection dish (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899468.3A CN115117566B (en) | 2022-07-28 | 2022-07-28 | Lug connection structure of cylindrical battery and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899468.3A CN115117566B (en) | 2022-07-28 | 2022-07-28 | Lug connection structure of cylindrical battery and cylindrical battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115117566A true CN115117566A (en) | 2022-09-27 |
| CN115117566B CN115117566B (en) | 2024-08-02 |
Family
ID=83333891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210899468.3A Active CN115117566B (en) | 2022-07-28 | 2022-07-28 | Lug connection structure of cylindrical battery and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115117566B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117219972A (en) * | 2023-11-06 | 2023-12-12 | 深圳海辰储能科技有限公司 | Current collecting disc, energy storage device and electric equipment |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090208825A1 (en) * | 2008-02-20 | 2009-08-20 | Samsung Sdi Co., Ltd. | Electrode assembly and secondary battery using the same |
| CN201562719U (en) * | 2009-07-15 | 2010-08-25 | 深圳邦凯新能源股份有限公司 | Cylindrical battery |
| JP3182650U (en) * | 2013-01-23 | 2013-04-04 | 昇陽國際半導體股▲ふん▼有限公司 | Improved structure of secondary battery |
| CN110190238A (en) * | 2019-05-15 | 2019-08-30 | 广东微电新能源有限公司 | Button-type battery with access tripping protection function |
| CN212485421U (en) * | 2020-05-29 | 2021-02-05 | 惠州市聚和源科技有限公司 | Soft package battery |
| CN112542641A (en) * | 2020-12-09 | 2021-03-23 | 合肥国轩高科动力能源有限公司 | Cylindrical battery and manufacturing method thereof |
| CN214848703U (en) * | 2021-02-04 | 2021-11-23 | 东莞市沃泰通新能源有限公司 | Negative electrode end single-pole lug current collector and lithium battery |
| CN216698668U (en) * | 2021-11-30 | 2022-06-07 | 云山新能源材料技术(深圳)有限公司 | Utmost point ear connection structure and coiling battery |
| WO2022116909A1 (en) * | 2020-12-04 | 2022-06-09 | 中澳储能电力科技（西安）有限公司 | High-capacity lithium-ion battery |
| CN114678663A (en) * | 2022-04-14 | 2022-06-28 | 广州小鹏汽车科技有限公司 | Pole lug connecting structure of cylindrical battery and cylindrical battery |
| CN217768467U (en) * | 2022-06-29 | 2022-11-08 | 楚能新能源股份有限公司 | Multi-tab cylindrical lithium ion battery |
-
2022
- 2022-07-28 CN CN202210899468.3A patent/CN115117566B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090208825A1 (en) * | 2008-02-20 | 2009-08-20 | Samsung Sdi Co., Ltd. | Electrode assembly and secondary battery using the same |
| CN201562719U (en) * | 2009-07-15 | 2010-08-25 | 深圳邦凯新能源股份有限公司 | Cylindrical battery |
| JP3182650U (en) * | 2013-01-23 | 2013-04-04 | 昇陽國際半導體股▲ふん▼有限公司 | Improved structure of secondary battery |
| CN110190238A (en) * | 2019-05-15 | 2019-08-30 | 广东微电新能源有限公司 | Button-type battery with access tripping protection function |
| CN212485421U (en) * | 2020-05-29 | 2021-02-05 | 惠州市聚和源科技有限公司 | Soft package battery |
| WO2022116909A1 (en) * | 2020-12-04 | 2022-06-09 | 中澳储能电力科技（西安）有限公司 | High-capacity lithium-ion battery |
| CN112542641A (en) * | 2020-12-09 | 2021-03-23 | 合肥国轩高科动力能源有限公司 | Cylindrical battery and manufacturing method thereof |
| CN214848703U (en) * | 2021-02-04 | 2021-11-23 | 东莞市沃泰通新能源有限公司 | Negative electrode end single-pole lug current collector and lithium battery |
| CN216698668U (en) * | 2021-11-30 | 2022-06-07 | 云山新能源材料技术(深圳)有限公司 | Utmost point ear connection structure and coiling battery |
| CN114678663A (en) * | 2022-04-14 | 2022-06-28 | 广州小鹏汽车科技有限公司 | Pole lug connecting structure of cylindrical battery and cylindrical battery |
| CN217768467U (en) * | 2022-06-29 | 2022-11-08 | 楚能新能源股份有限公司 | Multi-tab cylindrical lithium ion battery |
Non-Patent Citations (2)
| Title |
|---|
| 李林等: "小型高功率氢镍电池的研究", 《电源技术》, vol. 37, no. 7, 5 September 2013 (2013-09-05), pages 1157 - 1159 * |
| 黄少军: "极耳连接电阻对叠片锂离子电池性能的影响", 《广东化工》, vol. 48, no. 23, pages 49 - 51 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117219972A (en) * | 2023-11-06 | 2023-12-12 | 深圳海辰储能科技有限公司 | Current collecting disc, energy storage device and electric equipment |
| CN117219972B (en) * | 2023-11-06 | 2024-01-30 | 深圳海辰储能科技有限公司 | Current collecting disc, energy storage device and electric equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115117566B (en) | 2024-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114975859B (en) | Electrode plate, winding core and battery of battery | |
| CN114759317A (en) | Utmost point ear structure, cylinder electricity core and vehicle | |
| CN115117566A (en) | Pole lug connecting structure of cylindrical battery and cylindrical battery | |
| CN102569721A (en) | Difference pitch pole pieces and power battery adopting difference pitch pole pieces | |
| CN115101899A (en) | Naked battery cell, manufacturing method of naked battery cell and battery cell structure | |
| CN213071293U (en) | Button cell pole piece and button cell | |
| CN211907618U (en) | Multi-lug cylindrical battery roll core and lithium ion battery | |
| CN114678663A (en) | Pole lug connecting structure of cylindrical battery and cylindrical battery | |
| CN210489776U (en) | Coil core assembly structure of button cell | |
| CN217334342U (en) | Battery, battery module and electronic equipment | |
| CN114597555A (en) | Cylindrical battery and method for manufacturing same | |
| CN110957466A (en) | Battery pole piece, battery roll core and cylindrical battery | |
| CN211376807U (en) | Battery pole piece, battery roll core and cylindrical battery | |
| CN220041941U (en) | Rolling core assembly, cylindrical battery and power battery pack | |
| CN218215609U (en) | Cylindrical battery | |
| CN115117286A (en) | Electrode plate of battery, roll up core and battery | |
| CN217062165U (en) | Pole piece and battery | |
| CN217134462U (en) | Lithium battery with tab middle-arranged welding structure | |
| CN214336772U (en) | Winding cell structure and lithium ion battery | |
| CN215644609U (en) | Battery pole group and battery | |
| JP2001060456A (en) | Metal-plate current collector and secondary battery using same | |
| CN218957772U (en) | Battery pole piece, battery and electric vehicle | |
| CN217444587U (en) | Current collecting component, electrode assembly and battery | |
| CN218215601U (en) | Electrode electric conduction heat conduction current-collecting disc | |
| CN218827301U (en) | Coil needle structure and electricity core coiling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |