CN113871765B - Cylindrical battery and manufacturing method thereof - Google Patents
Cylindrical battery and manufacturing method thereof Download PDFInfo
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- CN113871765B CN113871765B CN202111126023.3A CN202111126023A CN113871765B CN 113871765 B CN113871765 B CN 113871765B CN 202111126023 A CN202111126023 A CN 202111126023A CN 113871765 B CN113871765 B CN 113871765B
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- positive electrode
- negative electrode
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 153
- 238000003466 welding Methods 0.000 claims abstract description 115
- 238000004804 winding Methods 0.000 claims abstract description 94
- 229910052751 metal Inorganic materials 0.000 claims abstract description 82
- 239000002184 metal Substances 0.000 claims abstract description 82
- 230000006835 compression Effects 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 50
- 239000003292 glue Substances 0.000 claims description 36
- 238000005096 rolling process Methods 0.000 claims description 36
- 239000003792 electrolyte Substances 0.000 claims description 20
- 239000011888 foil Substances 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000000565 sealant Substances 0.000 description 6
- 238000011056 performance test Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells 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
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
-
- 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
Abstract
The application relates to a cylindrical battery and a manufacturing method thereof, and belongs to the technical field of power batteries. The full-lug winding core assembly is fixed in the metal pipe, one end of the metal pipe is embedded into the insulating sealing ring, the positive electrode cover plate assembly is placed into the insulating sealing ring, and sealing among the positive electrode cover plate assembly, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; the other end of the metal pipe is embedded into an insulating sealing ring, then the negative electrode cover plate assembly is placed into the insulating sealing ring, and the sealing among the negative electrode cover plate assembly, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; welding the positive end face of the full-lug winding core with the positive cover plate component in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-tab winding core together in a laser welding mode. The high-current charge and discharge performance of the battery can be improved, the battery accessories are simplified, and the qualification rate of the battery is improved.
Description
Technical Field
The present disclosure relates to a cylindrical battery and a method for manufacturing the same, and more particularly, to a cylindrical battery with a simple structure and a method for manufacturing the same, which belong to the technical field of power batteries.
Background
Compared with other batteries, the cylindrical battery has the characteristics of less equipment investment, high production efficiency, low comprehensive cost and the like. The full-lug battery has the advantages of good power performance, small internal resistance, less heat generation, long cycle life, capacity bottleneck breakthrough and the like, receives high attention from the industry, and realizes industrialization successively.
In the assembly process of the full-lug aluminum shell battery, the difficult problem is how to realize the connection between the lug and the cover plate pole, so the current collecting disc becomes a key component for connecting the battery lug and the cover plate pole, the positive and negative current collecting plates are respectively arranged on the positive and negative end surfaces of the winding core in a laser welding mode, and then the current collecting plates are fixedly connected to the corresponding electrode caps, so the assembly process is complex; moreover, the simultaneous application of the current collector and cap to the battery results in a greater weight of inactive components in the battery structure, affecting the specific power or specific energy enhancement of the battery.
CN207765484U discloses a full-tab cylindrical battery, which comprises a shell, a cap and a full-tab winding core, wherein the cap and the full-tab winding core are arranged on the shell and are in insulating connection with the shell, the cap is in contact connection with the electrode flow guiding end face of the full-tab winding core, and the cap is simultaneously used as a current collector and a packaging structure. In the process of assembling the battery, the anode and cathode caps are welded to the corresponding electrode flow guide end surfaces at one time in an ultrasonic welding mode.
The CN109360932A is provided with the V-shaped grooves which are mirror symmetry on the surface of the disk body, the V-shaped grooves are combined into the X-shaped grooves to be contacted with the battery lugs, so that the contact area is increased, meanwhile, the V-shaped grooves are used as channels for laser welding, and the formed welding spots are uniformly distributed on the surfaces of the lugs, so that the problem that the proportion of the welding spots is reduced along with the increase of the radius of the cylindrical all-lug battery, and the flow guiding difficulty is influenced is effectively solved; two round holes are formed in the surface of the tray body, so that the infiltration of electrolyte during liquid injection is facilitated, and meanwhile, the quality of the tray body can be reduced, and the weight is reduced; the reinforcing ribs are arranged on the surface of the tail body, so that the stress generated by bending of metal can be eliminated, and the flow guide stability of the flow collecting disc after the flow collecting disc, the cover plate and the shell are assembled is ensured.
And as in CN102299271A, the cylindrical lithium ion power battery of the invention uses a ceramic ring to separate the positive electrode from the negative electrode, the ceramic ring, a negative electrode (positive electrode) cover plate and a negative electrode (positive electrode) post are welded in a sealing way, the welding seam is compact, and the vacuum tightness can be achieved after welding. Electrolyte in the battery core can be effectively separated, so that the problem of leakage of the battery in long-time use is avoided, and the safety is high.
Disclosure of Invention
Therefore, the battery cover plate designed by the invention has the function of the current collecting disc, and has the advantages of simple structure and simple process, and is different from the prior art. Meanwhile, the battery manufactured by the cover plate can realize closed formation, so that high current output is met, and the specific energy of the battery is improved. The invention can (1) improve the high-current charge and discharge performance of the battery. And (2) simplifying battery accessories and reducing cost. (3) The inactive material space in the battery is reduced, and the volumetric specific energy and the gravimetric specific energy of the battery are improved. (4) And the hidden trouble of micro short circuit caused by the fact that laser welding spatter enters the battery is reduced. (5) The leaked battery after current collecting welding can be repaired and welded, so that scrappage is reduced, and the qualification rate of the battery is improved.
The application provides a cylindrical battery, which comprises a full-lug winding core group, a metal pipe, an anode cover plate component, an insulating sealing ring, a cathode cover plate component and a central pipe, wherein the full-lug winding core group is fixed in the metal pipe, one end of the metal pipe is embedded into the insulating sealing ring, the anode cover plate component is arranged in the insulating sealing ring, and the sealing among the anode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; an insulating sealing ring is embedded at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, and sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; welding the positive end face of the full-lug winding core with the positive cover plate component in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-tab winding core together in a laser welding mode.
Further, in the above-mentioned cylindrical battery, the full tab winding core group includes: the full-tab winding core, the positive electrode guard ring and the negative electrode guard ring are buckled at the positive electrode end of the full-tab winding core, and the negative electrode guard ring is buckled at the negative electrode end of the full-tab winding core.
Further, in the above cylindrical battery, the positive electrode cap assembly includes: the positive electrode cover plate, the positive electrode welding area, the positive electrode safety valve, the positive electrode liquid injection hole and the positive electrode sealing glue piece are arranged in a plurality of mode, the positive electrode safety valve is arranged in a gap of the positive electrode welding area, the positive electrode liquid injection hole is arranged in the central area of the positive electrode cover plate assembly, and the positive electrode sealing glue piece is embedded below the positive electrode liquid injection hole and is matched with a cavity of the positive electrode cover plate.
Further, in the above-mentioned cylindrical battery, the negative electrode cap assembly includes: the negative electrode cover plate, the negative electrode welding area, the negative electrode safety valve, the negative electrode liquid injection hole and the negative electrode sealing glue piece are arranged in the negative electrode welding area, the negative electrode safety valve is arranged in a gap of the negative electrode welding area, the central area of the negative electrode cover plate component is the negative electrode liquid injection hole, and the negative electrode sealing glue piece is embedded below the negative electrode liquid injection hole and is matched with a cavity of the negative electrode cover plate.
Further, in the above cylindrical battery, the positive electrode welding area and the negative electrode welding area are designed in various shapes.
Further, in the cylindrical battery, the positive electrode foil and the negative electrode foil at the two ends of the full-tab winding core are respectively shaped, and the positive electrode guard ring and the negative electrode guard ring are respectively sleeved at the two ends of the full-tab winding core, so that the manufacturing of the full-tab winding core group is completed; rolling a groove at one end of a metal pipe, putting a full-tab winding core into the metal pipe from one end of the non-rolling groove, and rolling a groove at the other end of the metal pipe, so that the full-tab winding core group is fixed in the metal pipe; an insulating sealing ring is embedded above a rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the insulating sealing ring, and sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; an insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, and the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode; welding the welding area of the positive electrode cover plate component and the positive electrode end face of the full-lug winding core together in a laser welding mode; and welding the welding area of the negative electrode cover plate assembly and the negative electrode end face of the full-tab winding core together in a laser welding mode.
Further, in the cylindrical battery, the sealing performance test is performed by inserting the needle through the positive electrode liquid injection hole in the positive electrode cover plate assembly and penetrating the positive electrode sealing glue piece at the positive electrode end, and if the welding area fails the sealing performance test, the positive electrode repairing piece or the negative electrode repairing piece is welded on the corresponding welding area.
Further, in the cylindrical battery, after the battery is dried, a needle is inserted into a positive electrode liquid injection hole on the positive electrode cover plate assembly to penetrate through a positive electrode sealing glue piece at the positive electrode end, electrolyte is injected into the battery, and then a needle head is pulled out to weld a sealing cover; after formation, the electrolyte can be injected through the negative electrode liquid injection hole on the negative electrode cover plate component, a needle is inserted into the negative electrode liquid injection hole, the negative electrode sealing glue piece penetrating through the negative electrode end is injected, then the needle head is pulled out, and the sealing cover is welded.
The application also provides a manufacturing method of the cylindrical battery, wherein the positive and negative cover plate assemblies have the functions of all-lug battery end face welding and battery output terminals, and the positive cover plate assemblies and the positive end face of the all-lug winding core are welded together in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-tab winding core together in a laser welding mode.
Further, the manufacturing method of the cylindrical battery specifically comprises the following steps:
1) The central tube is directly coiled when the anode, the cathode and the diaphragm are coiled, or the full-lug coiled core is arranged after being manufactured;
2) Respectively shaping the positive electrode foil and the negative electrode foil at two ends of the full-tab winding core;
3) Respectively sleeving an anode guard ring and a cathode guard ring at two ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core group;
4) Rolling a groove at one end of a metal pipe;
5) Putting the full-tab winding core group into a metal tube from one end of the non-rolling groove;
6) Rolling grooves are formed in the other end of the metal tube, so that the full-tab winding core group is fixed in the metal tube;
7) An insulating sealing ring is embedded above a rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the insulating sealing ring, and sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode;
8) An insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, and the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode;
9) Welding the welding area of the positive electrode cover plate component and the positive electrode end face of the full-lug winding core together in a laser welding mode;
10 Welding the welding area of the negative electrode cover plate assembly and the negative electrode end face of the full-tab winding core together in a laser welding mode;
11 A needle is inserted through a positive electrode liquid injection hole on the positive electrode cover plate component and penetrates through a positive electrode sealing glue piece at the positive electrode end to perform tightness test;
12 If the welding area fails the tightness test, welding the positive electrode reworking sheet or the negative electrode reworking sheet on the corresponding welding area;
13 After the battery is dried, a needle can be inserted into the positive electrode liquid injection hole on the positive electrode cover plate component to penetrate through the positive electrode sealing glue piece at the positive electrode end, electrolyte is injected, then the needle head is pulled out, and the sealing cover is welded;
14 After formation, a needle is inserted into a negative electrode liquid injection hole on the negative electrode cover plate assembly to penetrate through a negative electrode sealing glue piece at the negative electrode end, electrolyte is injected, then a needle head is pulled out, and a sealing cover is welded;
15 Thus, the manufacture of the cylindrical battery having a simple structure is completed.
The application has the following technical effects and advantages:
1. the positive and negative electrode cover plate component has the functions of full-tab battery end face welding and battery output terminals, has high structural integration level, reduces inactive substance space inside the battery, and can obviously improve volumetric specific energy and gravimetric specific energy of the battery.
2. The positive and negative electrode cover plate component can meet the requirement of high-current use and has high specific power.
3. The battery is sealed and then subjected to laser welding, so that splashes generated by laser welding can be completely prevented from entering the battery, the quality of the battery is improved, and hidden danger of short circuit and micro short circuit is reduced.
4. The battery has less fittings, simple process and low cost.
5. The leaked battery after current collecting welding can be repaired and welded, so that scrappage is reduced, and the qualification rate of the battery is improved.
6. The working environment is clean and pollution-free.
Drawings
Fig. 1 is a product view of a battery of the present invention.
Fig. 2 is a general exploded view of the battery of the present invention.
Fig. 3 (1) -3 (3) are schematic views of the full tab winding core of the present invention, wherein fig. 3 (1) is a front view, fig. 3 (2) is a side view of the positive (negative) electrode guard ring, and fig. 3 (3) is a top view of the positive (negative) electrode guard ring.
Fig. 4 (1) -4 (3) are schematic diagrams of the positive electrode cover plate assembly of the present application, wherein fig. 4 (1) is a front view, fig. 4 (2) is a cross-sectional view, and fig. 4 (3) is a sealant member.
Fig. 5 (1) -5 (3) are schematic views of the negative electrode cover plate assembly of the present application, wherein fig. 5 (1) is a front view, fig. 5 (2) is a cross-sectional view, and fig. 5 (3) is a sealant.
FIG. 6 is a schematic view of a rolling groove at one end of a metal tube according to the present invention.
Fig. 7 is a schematic view of the full tab winding core of the present invention being in a can.
Fig. 8 is a schematic view of the other end of the metal tube after the full tab winding core of the present invention is put into the case.
Fig. 9 (1) -9 (4) are schematic diagrams of the battery sealing process according to the present invention, wherein fig. 9 (1) is an exploded view after the sealing ring and the positive electrode cover plate are placed at the positive electrode end, fig. 9 (2) is an exploded view after the sealing ring and the negative electrode cover plate are placed at the negative electrode end, fig. 9 (3) is a battery view after mechanical compression sealing, and fig. 9 (4) is a top view of the positive (negative) end.
Fig. 10 is a schematic view of the positive electrode electrolyte injection of the battery of the present invention.
Fig. 11 (1) and 11 (2) are schematic views of the battery positive/negative electrode terminal peripheral welding sealing sheet of the present invention, wherein fig. 11 (1) is a schematic view before the battery positive/negative electrode terminal peripheral welding sealing sheet of the present invention, and fig. 11 (2) is a schematic view at the time of or after the battery positive/negative electrode terminal peripheral welding sealing sheet of the present invention.
Fig. 12 is a schematic diagram of the negative terminal of the battery of the present invention being evacuated and the electrolyte being replenished.
Detailed Description
The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions used in the examples may be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are generally those in routine experiments.
In the figure, 1 is a full-tab winding core group, 2 is a metal pipe, 3 is a positive electrode cover plate component, 4 is a sealing cover, 5 is an insulating sealing ring, 6 is a negative electrode cover plate component, 7 is a central pipe, 8 is a positive electrode repair sheet, and 9 is a negative electrode repair sheet.
As shown in fig. 1 and 2, the cylindrical battery designed by the invention comprises a full-tab winding core group 1, a metal tube 2, a positive electrode cover plate assembly 3, a sealing cover 4, an insulating sealing ring 5, a negative electrode cover plate assembly 6, a central tube 7, a positive electrode repair sheet 8 and a negative electrode repair sheet 9.
As shown in fig. 3 (1) - (3), the full tab winding core set 1 includes: the full-tab winding core 1-1, the positive electrode guard ring 1-2 and the negative electrode guard ring 1-3. The positive guard ring 1-2 is buckled at the positive end of the full-tab winding core, and the negative guard ring 1-3 is buckled at the negative end of the full-tab winding core.
As shown in fig. 4 (1) - (3), the positive electrode cap assembly 3 includes: the positive electrode cover plate 3-0, the positive electrode welding area 3-1, the safety valve 3-2, the liquid injection hole 3-3 and the sealing glue piece 3-4. The positive electrode welding area 3-1 is provided with a plurality of safety valves 3-2, the clearance of the welding area is provided with a liquid injection hole 3-3 in the central area of the positive electrode cover plate component, and the sealing glue piece 3-4 is embedded below the liquid injection hole and matched with the cavity of the positive electrode cover plate 3-0.
As shown in fig. 5 (1) - (3), the anode cap assembly 6 includes: the negative electrode cover plate 6-0, the negative electrode welding area 6-1, the safety valve 6-2, the liquid injection hole 6-3 and the sealing glue piece 6-4. The welding area 6-1 of the negative electrode is provided with a plurality of safety valves 6-2, the clearance of the welding area is arranged, the central area of the negative electrode cover plate component is provided with a liquid injection hole 6-3, and the sealing glue piece 6-4 is embedded below the liquid injection hole and is matched with the cavity of the negative electrode cover plate 6-0.
As shown in fig. 1 to 12, the positive electrode land 3-1 and the negative electrode land 6-1 may be designed in various shapes.
The central tube 9 can be directly coiled when the anode, the cathode and the diaphragm are coiled, or can be placed after the full tab winding core 1-1 is manufactured.
And respectively shaping the positive electrode foil and the negative electrode foil at the two ends of the full-tab winding core 1-1.
The positive guard ring 1-2 and the negative guard ring 1-3 are respectively sleeved at the two ends of the full-tab winding core 1-1, thereby completing the manufacture of the full-tab winding core group 1.
One end of the metal pipe 2 is grooved.
The full tab winding core 1 is placed into the metal tube 2 from one end of the non-roll groove.
And then the other end of the metal tube 2 is grooved, so that the full tab winding core group 1 is fixed in the metal tube 2.
An insulating sealing ring 5 is embedded above the rolling groove position at one end of the metal pipe 2, then the positive electrode cover plate assembly 3 is placed in the insulating sealing ring 5, and sealing among the positive electrode cover plate assembly 3, the insulating sealing ring 5 and the metal pipe 2 is completed in a mechanical compression mode.
An insulating sealing ring 5 is embedded above the rolling groove position at the other end of the metal pipe 2, then the negative electrode cover plate assembly 6 is placed in the insulating sealing ring 5, and sealing among the negative electrode cover plate assembly 6, the insulating sealing ring 5 and the metal pipe 2 is completed in a mechanical compression mode.
And welding the welding area 3-1 of the positive electrode cover plate component and the positive electrode end face of the full-tab winding core together in a laser welding mode.
And welding the welding area 6-1 of the negative electrode cover plate assembly and the negative electrode end face of the full-tab winding core together in a laser welding mode.
The sealing performance test can be performed by inserting a needle through the liquid injection hole 3-3 on the positive electrode cover plate assembly 3 and penetrating through the sealing glue piece 3-4 at the positive electrode end.
If the welded area fails the sealability test, the positive electrode rework sheet 8 or the negative electrode rework sheet 9 is welded on the corresponding welded area.
After the battery is dried, a needle can be inserted through the liquid injection hole 3-3 on the positive electrode cover plate component 3 to penetrate through the sealant 3-4 at the positive electrode end, electrolyte is injected, then the needle head is pulled out, and the sealing cover 4 is welded.
After formation, the needle is inserted through the liquid injection hole 6-3 of the negative electrode cover plate assembly 6, the electrolyte is injected through the sealant 6-4 at the negative electrode end, and then the needle head is withdrawn to weld the sealing cover 4.
The specific manufacturing process is as follows:
1) The central tube 9 can be directly coiled when the anode, the cathode and the diaphragm are coiled, or can be placed after the full tab winding core 1-1 is manufactured.
2) And respectively shaping the positive electrode foil and the negative electrode foil at the two ends of the full-tab winding core 1-1.
3) The positive guard ring 1-2 and the negative guard ring 1-3 are respectively sleeved at the two ends of the full-tab winding core 1-1, thereby completing the manufacture of the full-tab winding core group 1.
4) One end of the metal pipe 2 is grooved.
5) And placing the full-tab winding core group 1 into the metal tube 2 from one end of the non-rolling groove.
6) And then the other end of the metal tube 2 is grooved, so that the full tab winding core group 1 is fixed in the metal tube 2.
7) An insulating sealing ring 5 is embedded above the rolling groove position at one end of the metal pipe 2, then the positive electrode cover plate assembly 3 is placed in the sealing ring, and sealing among the positive electrode cover plate assembly 3, the insulating sealing ring 5 and the metal pipe 2 is completed in a mechanical compression mode.
8) An insulating sealing ring 5 is embedded above the rolling groove position at the other end of the metal pipe 2, then the negative electrode cover plate assembly 6 is placed in the insulating sealing ring, and sealing among the negative electrode cover plate assembly 6, the insulating sealing ring 5 and the metal pipe 2 is completed in a mechanical compression mode.
9) And welding the welding area 3-1 of the positive electrode cover plate component and the positive electrode end face of the full-tab winding core together in a laser welding mode.
10 The welding area 6-1 of the negative electrode cover plate component and the negative electrode end face of the full-tab winding core are welded together in a laser welding mode.
11 Through the liquid injection hole 3-3 on the positive electrode cover plate component 3, a needle is inserted to penetrate the sealing glue piece 3-4 at the positive electrode end for sealing performance test.
12 If the welded area fails the sealability test, the positive electrode rework sheet 8 or the negative electrode rework sheet 9 is welded on the corresponding welded area.
13 After the battery is dried, a needle can be inserted through the liquid injection hole 3-3 on the positive electrode cover plate component 3 to penetrate through the sealant 3-4 at the positive electrode end, electrolyte is injected, then the needle head is pulled out, and the sealing cover 4 is welded.
14 After formation, the needle is inserted through the liquid injection hole 6-3 of the negative electrode cover plate assembly 6, the electrolyte is injected through the sealant 6-4 at the negative electrode end, and then the needle head is withdrawn to weld the sealing cover 4.
15 Thus, the manufacture of the cylindrical battery having a simple structure is completed.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application.
Claims (2)
1. A cylindrical battery is characterized by comprising a full-lug winding core group, a metal tube, a positive electrode cover plate component, a sealing cover, an insulating sealing ring, a negative electrode cover plate component, a central tube, a positive electrode repairing sheet and a negative electrode repairing sheet,
the full tab winding core group comprises: the full-tab winding core, the positive electrode guard ring and the negative electrode guard ring, the positive electrode guard ring is buckled at the positive electrode end of the full-tab winding core, the negative electrode guard ring is buckled at the negative electrode end of the full-tab winding core,
the positive electrode cover plate assembly includes: the positive electrode cover plate, the positive electrode welding area, the safety valve, the liquid injection hole and the sealing glue piece are arranged in a plurality of positive electrode welding areas, the safety valve is arranged in the gap of the welding area, the liquid injection hole is arranged in the central area of the positive electrode cover plate component, the sealing glue piece is embedded below the liquid injection hole and is matched with the cavity of the positive electrode cover plate,
the negative electrode cap assembly includes: the cathode cover plate, the cathode welding area, the safety valve, the liquid injection hole and the sealing glue piece are arranged in a plurality of the cathode welding areas, the safety valve is arranged in the gap of the welding area, the liquid injection hole is arranged in the central area of the cathode cover plate component, the sealing glue piece is embedded below the liquid injection hole and is matched with the cavity of the cathode cover plate,
the central tube is directly coiled when the anode, the cathode and the diaphragm are coiled, or is put into the central tube after the full-tab coiled core is manufactured,
shaping the positive electrode foil and the negative electrode foil at two ends of the full-tab winding core respectively,
the positive guard ring and the negative guard ring are respectively sleeved at the two ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core group,
one end of the metal pipe is processed by rolling groove,
the full-tab winding core is put into a metal tube from one end of the non-rolling groove,
then rolling groove is carried out on the other end of the metal tube, thereby fixing the full tab winding core group in the metal tube,
an insulating sealing ring is embedded above the rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the insulating sealing ring, the sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
an insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
the welding area of the positive electrode cover plate component is welded with the positive electrode end face of the full-lug winding core by a laser welding mode,
the welding area of the negative electrode cover plate component is welded with the negative electrode end face of the full-tab winding core by a laser welding mode,
a needle is inserted through a liquid injection hole on the positive electrode cover plate component and penetrates through a sealing glue piece at the positive electrode end to perform a tightness test,
if the welding area fails the tightness test, welding the positive electrode reworking sheet or the negative electrode reworking sheet on the corresponding welding area,
after the battery is dried, a needle is inserted through a liquid injection hole on the positive electrode cover plate component, a sealing glue piece penetrating through the positive electrode end is injected with electrolyte, then a needle head is pulled out, a sealing cover is welded,
after formation, a needle is inserted through a liquid injection hole on the negative electrode cover plate component, a sealing glue piece penetrating through the negative electrode end is injected with electrolyte, then a needle head is extracted, a sealing cover is welded,
the specific manufacturing process is as follows:
1) The central tube is directly coiled when the anode, the cathode and the diaphragm are coiled, or is put into the central tube after the full-tab coiled core is manufactured,
2) Shaping the positive electrode foil and the negative electrode foil at two ends of the full-tab winding core respectively,
3) The positive guard ring and the negative guard ring are respectively sleeved at the two ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core group,
4) One end of the metal pipe is processed by rolling groove,
5) The full-tab winding core group is put into a metal tube from one end of the non-rolling groove,
6) Then rolling groove is carried out on the other end of the metal tube, thereby fixing the full tab winding core group in the metal tube,
7) An insulating sealing ring is embedded above the rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the sealing ring, the sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
8) An insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
9) The welding area of the positive electrode cover plate component is welded with the positive electrode end face of the full-lug winding core by a laser welding mode,
10 A welding area of the negative electrode cover plate component is welded with the negative electrode end face of the full-tab winding core in a laser welding mode,
11 A needle is inserted through the liquid injection hole on the positive electrode cover plate component and penetrates through the sealing glue piece at the positive electrode end to perform a tightness test,
12 If the welded area fails the sealability test, welding the positive electrode rework sheet or the negative electrode rework sheet on the corresponding welded area,
13 After the battery is dried, a needle is inserted through a liquid injection hole on the positive electrode cover plate component to penetrate through a sealing glue piece at the positive electrode end, electrolyte is injected, then a needle head is pulled out, a sealing cover is welded,
14 After formation, a needle is inserted through a liquid injection hole on the negative electrode cover plate component, a sealing glue piece penetrating through the negative electrode end is injected with electrolyte, then a needle head is extracted, a sealing cover is welded,
15 And thus, the manufacture of the cylindrical battery is completed,
therefore, the designed battery cover plate has the function of a current collecting disc, meanwhile, the battery manufactured by the cover plate realizes the formation of a closed end, the positive and negative electrode cover plate components have the functions of full-lug battery end face welding and battery output terminals, the structural integration level is high, the inactive substance space inside the battery is reduced, the volumetric specific energy and the weight specific energy of the battery are improved, the positive and negative electrode cover plate components meet the requirement of high-current use, the specific power is high, the battery is subjected to laser welding after being sealed, the spatter of the laser welding is completely prevented from entering the battery, the quality of the battery is improved, the hidden danger of short circuit and micro short circuit is reduced, the positive and negative electrode current collecting disc is not used, and the battery leaked after the current collecting welding is subjected to repair welding.
2. A manufacturing method of a cylindrical battery is characterized in that the cylindrical battery comprises a full-lug winding core group, a metal tube, an anode cover plate component, a sealing cover, an insulating sealing ring, a cathode cover plate component, a central tube, an anode repairing sheet and a cathode repairing sheet,
the full tab winding core group comprises: the full-tab winding core, the positive electrode guard ring and the negative electrode guard ring, the positive electrode guard ring is buckled at the positive electrode end of the full-tab winding core, the negative electrode guard ring is buckled at the negative electrode end of the full-tab winding core,
the positive electrode cover plate assembly includes: the positive electrode cover plate, the positive electrode welding area, the safety valve, the liquid injection hole and the sealing glue piece are arranged in a plurality of positive electrode welding areas, the safety valve is arranged in the gap of the welding area, the liquid injection hole is arranged in the central area of the positive electrode cover plate component, the sealing glue piece is embedded below the liquid injection hole and is matched with the cavity of the positive electrode cover plate,
the negative electrode cap assembly includes: the cathode cover plate, the cathode welding area, the safety valve, the liquid injection hole and the sealing glue piece are arranged in a plurality of the cathode welding areas, the safety valve is arranged in the gap of the welding area, the liquid injection hole is arranged in the central area of the cathode cover plate component, the sealing glue piece is embedded below the liquid injection hole and is matched with the cavity of the cathode cover plate,
the central tube is directly coiled when the anode, the cathode and the diaphragm are coiled, or is put into the central tube after the full-tab coiled core is manufactured,
shaping the positive electrode foil and the negative electrode foil at two ends of the full-tab winding core respectively,
the positive guard ring and the negative guard ring are respectively sleeved at the two ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core group,
one end of the metal pipe is processed by rolling groove,
the full-tab winding core is put into a metal tube from one end of the non-rolling groove,
then rolling groove is carried out on the other end of the metal tube, thereby fixing the full tab winding core group in the metal tube,
an insulating sealing ring is embedded above the rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the insulating sealing ring, the sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
an insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
the welding area of the positive electrode cover plate component is welded with the positive electrode end face of the full-lug winding core by a laser welding mode,
the welding area of the negative electrode cover plate component is welded with the negative electrode end face of the full-tab winding core by a laser welding mode,
a needle is inserted through a liquid injection hole on the positive electrode cover plate component and penetrates through a sealing glue piece at the positive electrode end to perform a tightness test,
if the welding area fails the tightness test, welding the positive electrode reworking sheet or the negative electrode reworking sheet on the corresponding welding area,
after the battery is dried, a needle is inserted through a liquid injection hole on the positive electrode cover plate component, a sealing glue piece penetrating through the positive electrode end is injected with electrolyte, then a needle head is pulled out, a sealing cover is welded,
after formation, a needle is inserted through a liquid injection hole on the negative electrode cover plate component, a sealing glue piece penetrating through the negative electrode end is injected with electrolyte, then a needle head is extracted, a sealing cover is welded,
the specific manufacturing process is as follows:
1) The central tube is directly coiled when the anode, the cathode and the diaphragm are coiled, or is put into the central tube after the full-tab coiled core is manufactured,
2) Shaping the positive electrode foil and the negative electrode foil at two ends of the full-tab winding core respectively,
3) The positive guard ring and the negative guard ring are respectively sleeved at the two ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core group,
4) One end of the metal pipe is processed by rolling groove,
5) The full-tab winding core group is put into a metal tube from one end of the non-rolling groove,
6) Then rolling groove is carried out on the other end of the metal tube, thereby fixing the full tab winding core group in the metal tube,
7) An insulating sealing ring is embedded above the rolling groove position at one end of the metal pipe, then the positive electrode cover plate component is placed in the sealing ring, the sealing among the positive electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
8) An insulating sealing ring is embedded above the rolling groove position at the other end of the metal pipe, then the negative electrode cover plate component is placed in the insulating sealing ring, the sealing among the negative electrode cover plate component, the insulating sealing ring and the metal pipe is completed in a mechanical compression mode,
9) The welding area of the positive electrode cover plate component is welded with the positive electrode end face of the full-lug winding core by a laser welding mode,
10 A welding area of the negative electrode cover plate component is welded with the negative electrode end face of the full-tab winding core in a laser welding mode,
11 A needle is inserted through the liquid injection hole on the positive electrode cover plate component and penetrates through the sealing glue piece at the positive electrode end to perform a tightness test,
12 If the welded area fails the sealability test, welding the positive electrode rework sheet or the negative electrode rework sheet on the corresponding welded area,
13 After the battery is dried, a needle is inserted through a liquid injection hole on the positive electrode cover plate component to penetrate through a sealing glue piece at the positive electrode end, electrolyte is injected, then a needle head is pulled out, a sealing cover is welded,
14 After formation, a needle is inserted through a liquid injection hole on the negative electrode cover plate component, a sealing glue piece penetrating through the negative electrode end is injected with electrolyte, then a needle head is extracted, a sealing cover is welded,
15 And thus, the manufacture of the cylindrical battery is completed,
therefore, the designed battery cover plate has the function of a current collecting disc, meanwhile, the battery manufactured by the cover plate realizes the formation of a closed end, the positive and negative electrode cover plate components have the functions of full-lug battery end face welding and battery output terminals, the structural integration level is high, the inactive substance space inside the battery is reduced, the volumetric specific energy and the weight specific energy of the battery are improved, the positive and negative electrode cover plate components meet the requirement of high-current use, the specific power is high, the battery is subjected to laser welding after being sealed, the spatter of the laser welding is completely prevented from entering the battery, the quality of the battery is improved, the hidden danger of short circuit and micro short circuit is reduced, the positive and negative electrode current collecting disc is not used, and the battery leaked after the current collecting welding is subjected to repair welding.
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| CN114300734A (en) * | 2022-01-08 | 2022-04-08 | 江苏耐驰新能源科技有限公司 | Cylindrical lithium battery structure and manufacturing method thereof |
| CN114725591A (en) * | 2022-03-18 | 2022-07-08 | 中国第一汽车股份有限公司 | Full-tab battery structure without top cover welding and assembly method thereof |
| CN114628866A (en) * | 2022-03-28 | 2022-06-14 | 蓝京新能源(嘉兴)有限公司 | High-energy-density cylindrical battery and assembly process thereof |
| CN114824674A (en) * | 2022-03-28 | 2022-07-29 | 蓝京新能源(嘉兴)有限公司 | Cylindrical battery with high volume utilization rate and assembly process thereof |
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| CN114944531B (en) * | 2022-07-22 | 2022-11-04 | 楚能新能源股份有限公司 | Cylindrical battery cover plate assembly, battery and preparation method |
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