CN114899415B - Collector plate assembly, cylindrical lithium ion battery and assembly process - Google Patents
Collector plate assembly, cylindrical lithium ion battery and assembly process Download PDFInfo
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- CN114899415B CN114899415B CN202210817891.4A CN202210817891A CN114899415B CN 114899415 B CN114899415 B CN 114899415B CN 202210817891 A CN202210817891 A CN 202210817891A CN 114899415 B CN114899415 B CN 114899415B
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 title claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 53
- 239000011888 foil Substances 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 13
- 230000008595 infiltration Effects 0.000 abstract description 5
- 238000001764 infiltration Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a current collecting plate assembly, a cylindrical lithium ion battery and an assembly process, belonging to the field of lithium ion batteries.A spring plate is die-cut on a plate body and is welded with a pole post, and the spring plate deforms after being compressed, so that the welding part of the current collecting plate and the end face of a foil material is abutted tightly; through holes left by die cutting can be used as electrolyte injection channels, so that the infiltration of electrolyte between the pole pieces is improved; the disc body is welded with the foil on the positive electrode side of the winding core, so that the shell is positively charged, and the pole and the hole in the cover plate are conveniently sealed by welding; the negative pole adopts traditional negative pole collecting tray subassembly and negative pole top cap subassembly, and the electric property is insulating when being convenient for and apron are sealed.
Description
Technical Field
The invention relates to the field of lithium ion batteries, in particular to a current collecting plate assembly, a cylindrical lithium ion battery and an assembly process.
Background
The full-lug cylindrical lithium ion battery is a key development direction of the conventional power battery, and realizes electrical conduction by reserving blank positive and negative foils at two ends of a winding core respectively, radially extruding the foils, kneading the end faces, performing laser welding on a current collecting disc and the end faces of the foils, leading out a connecting sheet on the current collecting disc, and welding the connecting sheet with a pole on a cover plate.
However, the above current collecting disc and connection method have the following defects, which limit the large-scale popularization and application of the full-tab cylindrical lithium ion battery:
(1) The welding part of the current collecting disc and the end face of the foil is easy to have the condition of insufficient welding or weak welding, particularly in a vibration test, the current collecting disc is easy to fall off, so that the internal resistance of the battery is increased, the consistency of the internal resistance of a single battery cell is poor, a battery module or a battery pack is difficult to form through series-parallel connection, and the battery cell even cannot work normally under severe conditions;
(2) A current collecting plate connecting sheet needs to be added, and a pole is additionally arranged in the cover plate and welded with the current collecting plate connecting sheet, so that the structure can occupy the height space in the battery shell, and the energy density of the battery is greatly reduced.
Disclosure of Invention
In view of the above, the invention provides a current collecting plate assembly, a cylindrical lithium ion battery and an assembly process, which can solve the problem caused by insufficient soldering or falling off at the welding position of the current collecting plate and the end face of a foil.
The technical scheme of the invention is realized as follows:
on one hand, the invention provides a current collecting plate assembly which comprises a plate body, a pole column and a spring plate, wherein one end of the spring plate is connected with the plate body, the other end of the spring plate is tilted and welded with the pole column, the spring plate is formed by die cutting the middle part of the plate body, and a through hole is correspondingly formed in the die cutting part on the plate body.
On the basis of the technical scheme, preferably, at least two elastic sheets are arranged and are symmetrically arranged with respect to the central axis of the pole.
On the basis of the above technical solution, preferably, the size of the through hole is greater than or equal to the size of the elastic sheet.
On the basis of the above technical solution, preferably, the disc body includes a plurality of thickened portions and weak portions, which are continuously arranged, the thickened portions are arranged along a radial direction, the weak portions are formed between the thickened portions, the thickness of the thickened portions is greater than that of the weak portions, and the elastic sheet is formed by die-cutting the thickened portions.
In a second aspect, the invention provides a cylindrical lithium ion battery, which comprises a roll core, a shell and a cover plate, wherein the cover plate is covered at an opening at the end part of the shell and is sealed with the roll core, the roll core is arranged in the shell, two ends of the roll core are respectively provided with exposed foils, the foils are flattened to form a welding end face, the cylindrical lithium ion battery also comprises the current collecting disc assembly in the first aspect of the invention, the end face of the disc body, far away from a pole, is abutted against and welded with the welding end face, the cover plate is provided with a hole, the pole penetrates through the hole and is sealed and fixed with the hole, and the elastic sheet is in a compression deformation state.
On the basis of above technical scheme, it is preferred, utmost point post includes utmost point post body and spacing portion, and utmost point post body passes hole and bottom and shell fragment welding, and spacing portion sets up in utmost point post body side and supports with the apron.
On the basis of the above technical solution, preferably, the disc further comprises at least two bosses, and the bosses are arranged on the surface of the disc body and abut against the cover plate.
On the basis of the technical scheme, preferably, the periphery of the disc body is provided with positioning notches.
On the basis of the technical scheme, the disk body is preferably welded with the foil on the positive side of the winding core.
Preferably, the lithium ion battery further comprises a negative current collecting disc assembly and a negative top cover assembly, wherein the negative current collecting disc assembly comprises a negative current collecting disc and a connecting sheet, the negative top cover assembly comprises a negative top cover and a negative pole post, the negative top cover is arranged at an opening at the end part of the shell and is sealed with the opening, and the negative pole post is fixed on the negative top cover and is electrically insulated with the negative top cover; the welding end faces of the negative current collecting disc and the corresponding negative electrode of the winding core are mutually abutted and welded, the connecting sheet is bent, and two ends of the connecting sheet are respectively and electrically connected with the negative current collecting disc and the negative pole column.
In a third aspect, the present invention provides an assembly process for the cylindrical lithium ion battery of the second aspect, comprising the following steps:
s1, abutting and welding a disc body and a welding end face corresponding to a foil on the positive side of a winding core;
s2, abutting and welding the negative electrode current collecting disc and a welding end face corresponding to the foil on the negative electrode side of the winding core, and electrically connecting the connecting sheet with the negative electrode pole;
s3, bending the connecting sheet, and arranging the connecting sheet between the negative current collecting disc and the negative top cover;
s4, inserting the winding core into the shell;
s5, penetrating the pole through a hole, welding the pole with a cover plate, and sealing the hole and the pole;
and S6, covering the cover plate and the negative pole top cover at openings at two ends of the shell, and welding and sealing.
Compared with the prior art, the current collecting plate assembly, the cylindrical lithium ion battery and the assembly process have the following beneficial effects:
(1) The flexible connection effect can be realized by adopting a hard connection mode, and even if the welding part of the flow plate and the end face of the foil is subjected to false welding or falls off, the flow plate and the end face of the foil can be kept in tight electrical connection; the through hole left by die cutting can be used as an electrolyte injection channel, so that the infiltration of electrolyte between the pole pieces is improved; the spring plate is compressed after being assembled, the height space in the battery shell is hardly occupied, and compared with the conventional collector plate assembly, the energy density of the battery can be greatly improved;
(2) The thickened part and the weak part are arranged, so that the weight can be reduced on the premise of ensuring the strength of the disc body; meanwhile, the elastic sheet is formed by die cutting of the thickened part, so that the elasticity of the elastic sheet can be ensured;
(3) The limiting part is arranged, so that the limit of the pole and the hole on the cover plate is facilitated, the welding and sealing of the pole and the cover plate are facilitated, meanwhile, the contact area of the pole and the cover plate can be increased, and the overcurrent performance is improved;
(4) The lug boss is arranged to increase the contact area between the current collecting disc and the cover plate and improve the overcurrent performance;
(5) The positioning notch is arranged, so that the current collecting disc is convenient to position when being welded, and meanwhile, the current collecting disc can be used as an electrolyte filling channel, and the infiltration of electrolyte among pole pieces is improved;
(6) The disc body is welded with the foil on the positive electrode side of the winding core, so that the shell is positively charged, and the pole and the hole in the cover plate are conveniently sealed by welding; the negative pole adopts traditional negative pole collecting tray subassembly and negative pole top cap subassembly, and the electric property is insulating when being convenient for and apron are sealed.
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 drawings without creative efforts.
Fig. 1 is a perspective view of a header assembly of the present invention;
FIG. 2 is a top view of a header assembly of the present invention;
fig. 3 is a bottom view of the header assembly of the present invention;
FIG. 4 is a perspective view of a cylindrical lithium ion battery of the present invention;
fig. 5 is a front sectional view of a cylindrical lithium ion battery according to the present invention;
FIG. 6 is an enlarged view of the oval region of FIG. 5 rotated 90 counterclockwise;
FIG. 7 is an exploded view of a cylindrical lithium ion battery according to the present invention;
fig. 8 is a disassembled top view of the current collector assembly and negative cap assembly portions of a cylindrical lithium ion battery of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 to 3, the current collecting plate assembly of the present embodiment includes a plate body 1, a pole post 2, a spring plate 3, and a boss 4. As shown in fig. 4 to 8, the cylindrical lithium ion battery of the present embodiment includes a winding core 5, a case 6, a cover plate 7, a negative current collector assembly 8, and a negative cap assembly 9.
Wherein, the disc body 1 is made of metal and is electrically connected with the roll core 5. Specifically, two ends of the winding core 5 are respectively provided with an exposed foil 51, the foil 51 is flattened to form a welding end face 50, and the end face of the winding core body 1 far away from the pole 2 is abutted against and welded with the welding end face 50. Specifically, laser welding may be employed.
As described in the background of the invention, since the disk body 1 and the welding end face 50 are hard-connected, the welded portion is likely to be cold-welded or fall off, which leads to an increase in internal resistance of the battery or an open circuit. Therefore, the invention is provided with the elastic sheet 3 which is electrically connected with the disc body 1 and the pole 2; simultaneously, be in the deformation state after 3 assemblies of shell fragment are accomplished, can compress tightly set body 1 and welding end face 50, adopt the mode of hard joint, can realize the effect of flexible coupling, even appear the rosin joint or drop in set body 1 and welding end face 50 splice, also enable the two to keep inseparable electric connection.
Specifically, one end of the elastic sheet 3 is connected with the disc body 1, and the other end is tilted and welded with the pole 2. In order to facilitate rapid forming, the elastic sheet 3 is formed by die cutting the middle part of the disc body 1; simultaneously, adopt the mode of cross cutting to form shell fragment 3 still has following benefit: the die-cut position on the disc body 1 corresponds to the position of the through hole 10. The through hole 10 can be used as a pouring channel of electrolyte, and as is known to be relatively compact after the welding end face 50 of the full-lug cylindrical lithium ion battery is flattened, the problem that the electrolyte is difficult to infiltrate between pole pieces exists, and the problem of the infiltration of the electrolyte can be improved through the through hole 10.
In order to prevent the through hole 10 from being blocked after the elastic sheet 3 is compressed and deformed, so that the electrolyte cannot be poured; or the elastic sheet 3 cannot recover the deformation after being clamped into the through hole 10, as a preferred embodiment, the size of the through hole 10 is larger than or equal to that of the elastic sheet 3. Specifically, as shown in the attached drawings of the present invention, the corners of the through-hole 10 are provided with arc-shaped edges for passing the electrolyte.
One end of the elastic sheet 3 is tilted so as to prevent the elastic sheet 3 from being clamped into the through hole 10 in the assembling process, so that the elastic sheet 3 cannot deform. As a preferred embodiment, at least two elastic sheets 3 are arranged, and are arranged symmetrically with respect to the central axis of the pole 2. Therefore, even if one elastic sheet 3 is clamped in the through hole 10, the elastic sheet can be pulled out under the action of the other elastic sheets 3; in addition, the design of a plurality of elastic sheets 3 can also make the stress of each elastic sheet 3 more uniform. Specifically, as shown in the attached drawings of the invention, four spring pieces 3 are arranged, and the surface of the disc body 1 is in a cross-shaped layout.
For weight saving, the thinner the disc body 1 is, the better. However, if the disc body 1 is too thin, it has low strength and is easily deformed; in addition, the elastic sheet 3 is formed by die cutting from the disc body 1, the thickness of the elastic sheet is the same as that of the disc body 1, and the elastic force of the elastic sheet 3 which is too thin is insufficient. Therefore, as a preferred embodiment, the disc body 1 includes several thickened portions 11 and weakened portions 12 arranged in series, the thickened portions 11 are arranged in a radial direction, the weakened portions 12 are formed between the thickened portions 11, the thickened portions 11 are thicker than the weakened portions 12, and the elastic sheet 3 is formed by die-cutting the thickened portions 11. Therefore, on the premise of light weight, the strength of the disc body 1 can be ensured, and the elastic force of the elastic sheet 3 can be enough. Specifically, the bottom surface of the weak portion 12 abuts against the welding end surface 50 and is laser welded, so that the weak portion is thinner, easier to weld through and more reliable in welding.
The housing 6 is generally a cylindrical cylinder, and both ends thereof are open.
And a cover plate 7 which is arranged at the opening of the end part of the shell 6 in a covering mode and is sealed with the opening.
The winding core 5 is arranged in the shell 6, exposed foils 51 are respectively arranged at two ends of the winding core 5, and the foils 51 are kneaded to form a welding end face 50. As the prior art, the winding core 5 is formed by sequentially laminating a positive plate, an isolating film, a negative plate and an isolating film and then winding the positive plate, the isolating film, the negative plate and the isolating film to form a cylindrical barrel structure, and foils on the positive plate and the negative plate are exposed out of two ends of the winding core 5 and are flattened after winding to form a welding end face 50.
The header tray assembly of the present invention is assembled as follows:
the terminal surface that dish body 1 kept away from utmost point post 2 supports and welds with welding terminal surface 50 counterbalance, sets up porosely 70 on the apron 7, and utmost point post 2 passes hole 70 and seals with it, fixes, and shell fragment 3 is in compression deformation state. Thus, under the action of the resilience force of the elastic sheet 3, the disc body 1 is ensured to abut against the welding end face 50.
In order to facilitate the utmost point post 2 to be spacing with the hole 70 on the apron 7, utmost point post 2 includes utmost point post body 21 and spacing portion 22, and utmost point post body 21 passes hole 70 and the bottom welds with shell fragment 3, and spacing portion 22 sets up in utmost point post body 21 side and supports with apron 7. Specifically, utmost point post body 21 is the cylinder type, and spacing portion 22 is the annular, utmost point post body 21 and spacing portion 22 bottom terminal surface coplanar.
The pole 2 can be electrically connected to the cover plate 7, or can be designed to be insulated from the cover plate 7. Considering that the pole 2 and the hole 70 need to be sealed, if the pole 2 is in a movable state, the pole is not beneficial to sealing, therefore, the pole 2 and the hole 70 are sealed well by adopting a welding and fixing mode, and the pole 2 and the cover plate 7 are required to be electrically connected.
Through setting up spacing portion 22, the utmost point post 2 of being convenient for is sealed with apron 7 welding, can increase utmost point post 2 and apron 7 area of contact simultaneously again, improves the overcurrent performance.
In order to improve the overcurrent performance, the disc further comprises at least two bosses 4, and the bosses 4 are arranged on the surface of the disc body 1 and are abutted against the cover plate 7. Specifically, as shown in the drawings of the present invention, four bosses 4 are provided on the thickened portion 11 to improve the strength thereof. Specifically, the boss 4 is stamped and formed from the disc body 1.
In order to facilitate the positioning during the welding of the current collecting disc, the current collecting disc can also be used as an electrolyte filling channel to improve the infiltration of electrolyte between pole pieces, and positioning notches 13 are arranged at the edges around the disc body 1.
Considering that the collector plate assembly of the invention is adopted, the pole 2 needs to be electrically connected with the cover plate 7 and further electrically connected with the shell 6; the other terminal of the battery needs to be insulated from the housing 6 or a short circuit can be formed. In a preferred embodiment, the disk body 1 is welded to the foil 51 on the positive electrode side of the winding core 5. Thus, the casing 6 is positively charged, and plays a role in electrochemical corrosion prevention, thereby preventing the casing 6 made of metal from rusting.
The existing negative collector tray assembly 8 and negative cap assembly 9 may be used, taking into account the need for the other terminal of the battery to be insulated from the housing 6. Specifically, the negative current collecting disc assembly 8 comprises a negative current collecting disc 81 and a connecting sheet 82, the negative cap assembly 9 comprises a negative cap 91 and a negative pole 92, the negative cap 91 is covered on the opening at the end of the casing 6 and sealed with the opening, and the negative pole 92 is fixed on the negative cap 91 and electrically insulated from the negative pole 92; the negative current collecting plate 81 and the welding end face 50 corresponding to the negative electrode of the winding core 5 are mutually abutted and welded, and the connecting sheet 82 is bent and has two ends respectively electrically connected with the negative current collecting plate 81 and the negative electrode post 92. As the prior art, an insulating pad is disposed between the negative electrode post 92 and the negative electrode top cover 91 to electrically isolate the two.
The assembling process of the cylindrical lithium ion battery of the invention is introduced as follows, comprising the following steps:
s1, welding a positive current collecting plate: the disc body 1 is abutted and welded with a welding end face 50 corresponding to the foil 51 on the positive side of the winding core 5;
s2, welding an anode current collecting plate: the anode current collecting disc 81 is abutted against and welded with the welding end face 50 corresponding to the foil 51 on the anode side of the winding core 5, and the connecting sheet 82 is electrically connected with the anode pole 92;
s3, bending the connecting sheet 82: bending the connecting sheet 82 and arranging the connecting sheet between the anode current collecting disc 81 and the anode top cover 91;
s4, entering a shell; the winding core 5 is plugged into the shell 6;
s5, sealing the positive pole post 2: the pole 2 penetrates through the hole 70, the pole 2 is welded with the cover plate 7, and the hole 70 and the pole 2 are sealed;
s6, sealing the shell 6: the cover plate 7 and the negative electrode top cover 91 are covered at the openings at the two ends of the shell 6 and are welded and sealed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a cylinder type lithium ion battery, its includes roll core (5), casing (6) and apron (7), apron (7) lid is established at casing (6) end opening part and is sealed with it, roll up core (5) and set up in casing (6) and its roll core (5) both ends are provided with exposed foil (51) respectively, foil (51) form welding terminal surface (50), characterized in that after rubbing flat: the current collecting plate assembly comprises a plate body (1), a pole (2) and an elastic sheet (3), one end of the elastic sheet (3) is connected with the plate body (1), the other end of the elastic sheet is tilted and welded with the pole (2), the elastic sheet (3) is formed by die cutting the middle part of the plate body (1), and a through hole (10) is correspondingly formed in the die cutting part on the plate body (1);
the end face, far away from the pole (2), of the disc body (1) is tightly abutted to and welded with the welding end face (50), a hole (70) is formed in the cover plate (7), the pole (2) penetrates through the hole (70) and is sealed and fixed with the hole, and the elastic sheet (3) is in a compression deformation state; the disc body (1) comprises a plurality of thickened parts (11) and weak parts (12) which are continuously arranged, the thickness of each thickened part (11) is larger than that of each weak part (12), and the elastic sheet (3) is formed by die cutting of the thickened parts (11).
2. The cylindrical lithium ion battery of claim 1, wherein: the number of the elastic pieces (3) is at least two, and the elastic pieces are symmetrically arranged around the central shaft of the pole (2).
3. The cylindrical lithium ion battery of claim 1, wherein: the size of the through hole (10) is larger than or equal to that of the elastic sheet (3).
4. The cylindrical lithium ion battery of claim 1, wherein: the thickened parts (11) are arranged along the radial direction, and weak parts (12) are formed between the thickened parts (11).
5. The cylindrical lithium ion battery of claim 1, wherein: utmost point post (2) are including utmost point post body (21) and spacing portion (22), and utmost point post body (21) pass hole (70) and bottom and shell fragment (3) welding, and spacing portion (22) set up in utmost point post body (21) side and with apron (7) counterbalance and hold.
6. The cylindrical lithium ion battery according to claim 1, wherein: the disc is characterized by further comprising at least two bosses (4), wherein the bosses (4) are arranged on the surface of the disc body (1) and are abutted to the cover plate (7).
7. The cylindrical lithium ion battery of claim 1, wherein: the disc body (1) is welded with the foil (51) on the positive electrode side of the winding core (5).
8. The cylindrical lithium ion battery of claim 7, wherein: the negative pole current collecting disc assembly (8) and the negative pole top cover assembly (9) are further included, the negative pole current collecting disc assembly (8) comprises a negative pole current collecting disc (81) and a connecting piece (82), the negative pole top cover assembly (9) comprises a negative pole top cover (91) and a negative pole post (92), the negative pole top cover (91) is arranged at an opening at the end part of the shell (6) in a covering mode and is sealed with the opening, and the negative pole post (92) is fixed on the negative pole top cover (91) and is electrically insulated with the negative pole top cover (91); the negative electrode current collecting disc (81) and the welding end face (50) corresponding to the negative electrode of the winding core (5) are mutually abutted and welded, the connecting sheet (82) is arranged in a bending mode, and two ends of the connecting sheet are respectively and electrically connected with the negative electrode current collecting disc (81) and the negative electrode pole (92).
9. The process for assembling a cylindrical lithium ion battery according to claim 8, wherein: comprises the following steps of (a) carrying out,
s1, abutting and welding a disc body (1) with a welding end face (50) corresponding to a foil (51) on the positive electrode side of a winding core (5);
s2, abutting and welding the negative electrode current collecting disc (81) with a welding end face (50) corresponding to the foil (51) on the negative electrode side of the winding core (5), and electrically connecting the connecting sheet (82) with the negative electrode pole (92);
s3, bending the connecting sheet (82) and arranging the connecting sheet between the anode current collecting disc (81) and the anode top cover (91);
s4, the winding core (5) is plugged into the shell (6);
s5, enabling the pole (2) to penetrate through the hole (70), welding the pole (2) and the cover plate (7), and sealing the hole (70) and the pole (2);
and S6, covering the cover plate (7) and the negative pole top cover (91) at openings at two ends of the shell (6), and welding and sealing.
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| CN115395084A (en) * | 2022-09-26 | 2022-11-25 | 山东零壹肆先进材料有限公司 | Sodium ion cylindrical battery with continuous tabs and preparation method thereof |
| CN218997011U (en) * | 2022-12-21 | 2023-05-09 | 厦门海辰储能科技股份有限公司 | Current collecting disc for battery cell and battery cell |
| CN116190905B (en) * | 2023-03-30 | 2024-06-25 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3713978B2 (en) * | 1998-09-25 | 2005-11-09 | 松下電器産業株式会社 | Winding battery |
| DE60128020T2 (en) * | 2000-03-14 | 2007-12-27 | Sanyo Electric Co., Ltd., Moriguchi | Non-aqueous electrolytic secondary cells |
| KR100536253B1 (en) * | 2004-03-24 | 2005-12-12 | 삼성에스디아이 주식회사 | Secondary battery |
| JP5132269B2 (en) * | 2007-11-13 | 2013-01-30 | 日立ビークルエナジー株式会社 | Lithium ion secondary battery |
| CN104737350B (en) * | 2012-10-30 | 2017-03-15 | 三洋电机株式会社 | Cylindrical shape accumulator and battery module |
| CN204947019U (en) * | 2015-06-17 | 2016-01-06 | 深圳市沃特玛电池有限公司 | A kind of full lug column lithium ion battery |
| JP6787009B2 (en) * | 2016-09-30 | 2020-11-18 | 日本ケミコン株式会社 | Power storage device, manufacturing method of power storage device, and manufacturing method of current collector plate |
| KR102765440B1 (en) * | 2019-01-30 | 2025-02-12 | 삼성에스디아이 주식회사 | Secondary battery |
| KR102618121B1 (en) * | 2019-05-22 | 2023-12-27 | 삼성에스디아이 주식회사 | Secondary Battery |
| KR20220023100A (en) * | 2020-08-20 | 2022-03-02 | 삼성에스디아이 주식회사 | Secondary battery |
| CN213401445U (en) * | 2020-11-26 | 2021-06-08 | 江西远东电池有限公司 | Novel full utmost point ear structure cylinder 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 |
| CN113224472A (en) * | 2021-05-14 | 2021-08-06 | 陕西奥林波斯电力能源有限责任公司 | Current collecting disc of high-capacity battery and pole connecting structure thereof |
| CN215070164U (en) * | 2021-06-30 | 2021-12-07 | 比亚迪股份有限公司 | A block subassembly and cylinder battery for cylinder battery |
| CN114597504A (en) * | 2022-01-28 | 2022-06-07 | 安徽镭腾能源科技有限公司 | Safety assembly of low-internal-resistance cylindrical lithium battery without electrode lugs |
| CN216720237U (en) * | 2022-01-28 | 2022-06-10 | 蓝京新能源(嘉兴)有限公司 | Elastic sheet for preventing polar lug cylindrical battery from moving in height direction |
| CN114678600B (en) * | 2022-03-02 | 2025-07-11 | 江西远东电池有限公司 | A new cylindrical full-tab battery structure and its welding process |
| CN114628866A (en) * | 2022-03-28 | 2022-06-14 | 蓝京新能源(嘉兴)有限公司 | A high energy density cylindrical battery and its assembly process |
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