CN113871765A - Cylindrical battery and manufacturing method thereof - Google Patents
Cylindrical battery and manufacturing method thereof Download PDFInfo
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- CN113871765A CN113871765A CN202111126023.3A CN202111126023A CN113871765A CN 113871765 A CN113871765 A CN 113871765A CN 202111126023 A CN202111126023 A CN 202111126023A CN 113871765 A CN113871765 A CN 113871765A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 95
- 238000004804 winding Methods 0.000 claims abstract description 75
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 239000002184 metal Substances 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 35
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- 238000005096 rolling process Methods 0.000 claims description 26
- 239000003792 electrolyte Substances 0.000 claims description 16
- 239000000565 sealant Substances 0.000 claims description 14
- 239000011888 foil Substances 0.000 claims description 12
- 230000008439 repair process Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012797 qualification Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-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
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration 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
- 239000012945 sealing adhesive Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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
- 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
- H01M50/147—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
- 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
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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)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application relates to a cylindrical battery and a manufacturing method thereof, belonging to the technical field of power batteries. The full-lug winding core group is fixed in the metal tube, one end of the metal tube is embedded into the insulating sealing ring, the positive plate cover assembly is placed into the insulating sealing ring, and sealing among the positive plate cover assembly, the insulating sealing ring and the metal tube is completed in a mechanical compression mode; the other end of the metal tube is embedded into an insulating seal ring, the negative plate cover assembly is placed into the insulating seal ring, and the negative plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode; welding the positive plate cover plate component and the positive end face of the full-lug winding core together in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-lug winding core together in a laser welding mode. The battery high-current charging and discharging performance can be improved, battery accessories are simplified, and the battery qualification rate is improved.
Description
Technical Field
The application relates to a cylindrical battery and a manufacturing method thereof, in particular to a cylindrical battery with a simple structure and a manufacturing method thereof, and belongs 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-tab battery has the advantages of good power performance, small internal resistance, less heat generation, long cycle life, capacity bottleneck breaking and the like, is highly concerned by the industry, and continuously realizes industrialization.
In the assembly process of the full-lug aluminum-shell battery, the difficulty is how to realize the connection between the lug and the cover plate pole, therefore, the current collecting disc becomes a key part for connecting the lug and the cover plate pole of the battery, generally, the positive and negative current collecting plates are respectively installed on the positive and negative end surfaces of a winding core by adopting a laser welding mode, and then the current collecting plates are fixedly connected to corresponding electrode caps, so that the assembly process is complex; moreover, the use of both current collector and cap in a battery can result in a battery structure with a higher weight of inactive components, which can affect the improvement of specific power or specific energy of the battery.
CN207765484U discloses a full utmost point ear cylinder battery, including the casing and locate on this casing and with the block and the full utmost point ear book core that this casing insulation is connected, the block is connected with the electrode water conservancy diversion terminal surface contact of full utmost point ear book core, the block is used as mass flow body and packaging structure simultaneously. And in the process of assembling the battery, the positive and negative electrode caps are welded to the corresponding electrode flow guide end faces at one time by adopting an ultrasonic welding mode.
CN109360932A sets mirror symmetry V-shaped grooves on the surface of the tray body, the two are combined into an X-shaped groove to contact with the battery tab, the contact area is increased, meanwhile, the V-shaped grooves are used as the laser welding channel, the formed welding spots are uniformly distributed on the surface of the tab, and the problem that the flow guidance is difficult due to the fact that the welding spot proportion is reduced along with the increase of the radius of the cylindrical full-tab battery is effectively relieved; the two round holes are formed in the surface of the tray body, so that the electrolyte can be favorably infiltrated during liquid injection, the mass of the tray body can be reduced, and the weight can be favorably reduced; the reinforcing ribs are arranged on the surface of the tail body, so that stress generated by metal bending can be eliminated, and the flow guide stability of the flow collecting disc, the cover plate and the shell after assembly is ensured.
Like CN102299271A, the cylindrical lithium ion power battery of the invention uses the ceramic ring to separate the anode and the cathode, the ceramic ring is welded with the cathode (anode) cover plate and the cathode (anode) pole in a sealing way, the welding seam is compact, and the vacuum tightness can be achieved after welding. Electrolyte in the cell can be effectively isolated, 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 is different from the prior art, and the battery cover plate designed by the invention has the functions of a current collecting plate, and is simple in structure and process. Meanwhile, the battery manufactured by the cover plate can realize closed formation, meet the requirement of large current output and improve the specific energy of the battery. The invention can (1) improve the high-current charge and discharge performance of the battery. (2) The battery accessories are simplified, and the cost is reduced. (3) Reduce the space of inactive materials in the battery and improve the volumetric specific energy and the gravimetric specific energy of the battery. (4) The hidden trouble of micro short circuit caused by the fact that laser welding spatter enters the battery is reduced. (5) The battery leaked after the current collecting welding can be repaired and repaired, so that the scrap rate is reduced, and the qualified rate of the battery is improved.
The application provides a cylindrical battery, which comprises a full-lug winding core group, a metal tube, a positive plate cover plate component, an insulating sealing ring, a negative plate cover plate component and a central tube, wherein the full-lug winding core group is fixed in the metal tube, the insulating sealing ring is embedded into one end of the metal tube, the positive plate cover plate component is arranged in the insulating sealing ring, and the positive plate cover plate component, the insulating sealing ring and the metal tube are sealed in a mechanical compression mode; an insulating seal ring is embedded at the other end of the metal tube, the negative plate cover assembly is placed in the insulating seal ring, and the negative plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode; welding the positive plate cover plate component and the positive end face of the full-lug winding core together in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-lug winding core together in a laser welding mode.
Further, in the above-mentioned cylinder type battery, the core group is rolled up to full utmost point ear includes: the positive pole protective ring is buckled at the positive pole end of the full-lug winding core, and the negative pole protective ring is buckled at the negative pole end of the full-lug winding core.
Further, in the above cylindrical battery, the positive electrode cap plate assembly includes: anodal apron, anodal weld zone, anodal relief valve, anodal notes liquid hole, anodal sealant, anodal weld zone have a plurality of, and anodal relief valve locates anodal weld zone's clearance, and the central area of anodal apron subassembly is anodal notes liquid hole, and anodal sealant inlays in anodal notes liquid hole below to with the cavity phase-match of anodal apron.
Further, in the above cylindrical battery, the negative electrode cover plate assembly includes: negative pole apron, negative pole weld area, negative pole relief valve, negative pole annotate liquid hole, negative pole joint sealant, the negative pole weld area has a plurality of, and negative pole relief valve locates the clearance of negative pole weld area, and the central zone of negative pole apron subassembly is the negative pole and annotates the liquid hole, and the negative pole joint sealant inlays in negative pole notes liquid hole below to with the cavity phase-match of negative pole apron.
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-lug winding core are respectively shaped, and a positive electrode guard ring and a negative electrode guard ring are respectively sleeved at the two ends of the full-lug winding core, so that the manufacture of the full-lug winding core group is completed; performing slot rolling treatment on one end of the metal pipe, putting the full-lug winding core into the metal pipe from the end which is not subjected to slot rolling, and then performing slot rolling on the other end of the metal pipe, so that the full-lug winding core group is fixed in the metal pipe; an insulating seal ring is embedded above a slot position of a rolling groove at one end of the metal tube, then the positive plate cover assembly is placed in the insulating seal ring, and the positive plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode; an insulating seal ring is embedded above the slot position of the rolling groove at the other end of the metal tube, then the negative plate cover assembly is placed in the insulating seal ring, and the sealing among the negative plate cover assembly, the insulating seal ring and the metal tube is completed in a mechanical compression mode; welding a positive cover plate assembly welding area and the positive end face of the full-lug winding core together in a laser welding mode; and welding the welding area of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode.
Further, in the cylindrical battery, the needle is inserted through the positive electrode liquid injection hole in the positive electrode cover plate assembly, and penetrates through the positive electrode sealant at the positive electrode end to perform the tightness test, and if the welding area fails to pass the tightness test, the positive electrode repair sheet or the negative electrode repair sheet is welded on the corresponding welding area.
Further, in the cylindrical battery, after the battery is dried, a needle is inserted through a positive electrode liquid injection hole in the positive electrode cover plate assembly, the needle penetrates through the positive electrode sealing rubber piece at the positive electrode end, electrolyte is injected, then the needle head is drawn out, and the sealing cover is welded; after formation, a negative electrode liquid injection hole in the negative electrode cover plate assembly can be used for inserting a needle, the negative electrode sealant penetrating through the negative electrode end is used for injecting electrolyte, then the needle head is drawn out, and the sealing cover is welded.
The application also provides a manufacturing method of the cylindrical battery, wherein the positive and negative electrode cover plate assemblies have the functions of full-tab battery end face welding and battery output terminals, and the positive electrode cover plate assemblies and the positive electrode end face of the full-tab 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-lug 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 rolled in when the anode, the cathode and the diaphragm are wound, or the full-lug winding core is put after being made;
2) respectively shaping the positive foil and the negative foil at two ends of the full-lug winding core;
3) respectively sleeving a positive electrode guard ring and a negative electrode guard ring on two ends of the full-lug winding core, thereby completing the manufacture of the full-lug winding core group;
4) rolling a groove at one end of the metal pipe;
5) putting the full-lug winding core group into a metal pipe from one end of the non-rolling groove;
6) then, the other end of the metal tube is subjected to rolling groove, so that the full-lug winding core set is fixed in the metal tube;
7) an insulating seal ring is embedded above a slot position of a rolling groove at one end of the metal tube, then the positive plate cover assembly is placed in the insulating seal ring, and the positive plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode;
8) an insulating seal ring is embedded above the slot position of the rolling groove at the other end of the metal tube, then the negative plate cover assembly is placed in the insulating seal ring, and the sealing among the negative plate cover assembly, the insulating seal ring and the metal tube is completed in a mechanical compression mode;
9) welding a positive cover plate assembly welding area and the positive end face of the full-lug winding core together in a laser welding mode;
10) welding the welding area of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode;
11) a needle can be inserted through the positive electrode liquid injection hole on the positive electrode cover plate component and penetrates through the positive electrode sealing rubber piece at the positive electrode end to carry out tightness test;
12) if the welding area fails to pass the tightness test, welding the anode repair sheet or the cathode repair sheet on the corresponding welding area;
13) after the battery is dried, a needle can be inserted through a positive electrode liquid injection hole on the positive electrode cover plate component, the needle penetrates through the positive electrode sealing rubber piece at the positive electrode end, electrolyte is injected, then the needle head is drawn out, and the sealing cover is welded;
14) after formation, a needle can be inserted through a negative electrode liquid injection hole in the negative electrode cover plate assembly, the needle penetrates through a negative electrode sealing rubber piece at the negative electrode end, electrolyte is injected, then the needle head is drawn out, and a sealing cover is welded;
15) thus, 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 assembly has the functions of welding the end face of the full-lug battery and outputting the terminal of the battery, has high structural integration level, reduces the space of inactive substances in the battery, and can obviously improve the volumetric specific energy and the gravimetric specific energy of the battery.
2. The positive and negative cover plate assemblies meet the requirement of heavy current use and have high specific power.
3. The battery is sealed and then is 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 dangers of short circuit and micro short circuit are reduced.
4. The positive and negative current collecting plates are not used, the number of battery accessories is small, the process is simple, and the cost is low.
5. The battery leaked after the current collecting welding can be repaired and repaired, so that the scrap rate is reduced, and the qualified rate of the battery is improved.
6. The working environment is clean and pollution-free.
Drawings
Fig. 1 is a product diagram 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) pole guard ring, and fig. 3(3) is a top view of the positive (negative) pole guard ring.
Fig. 4(1) -4(3) are schematic views of the positive electrode cover plate assembly of the present application, in which fig. 4(1) is a front view, fig. 4(2) is a cross-sectional view, and fig. 4(3) is a sealing adhesive member.
Fig. 5(1) - (5) (3) are schematic views of the cathode cover plate assembly of the present application, in which 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 the roll groove at one end of the metal pipe of the present invention.
Fig. 7 is a schematic view of a full-tab winding core entering shell of the present invention.
Fig. 8 is a schematic view of the other end of the metal tube after the full-tab winding core of the invention is inserted into the shell.
Fig. 9(1) -9(4) are schematic diagrams illustrating the sealing process of the battery of the present invention, wherein fig. 9(1) is an explosion diagram after the sealing ring and the positive cover plate are placed at the positive end, fig. 9(2) is an explosion diagram after the sealing ring and the negative cover plate are placed at the negative end, fig. 9(3) is a diagram of the battery 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 terminal electrolyte injection of the battery of the present invention.
Fig. 11(1) and 11(2) are schematic diagrams of the sealing plate welded on the periphery of the positive/negative electrode end of the battery of the invention, wherein fig. 11(1) is a schematic diagram before the sealing plate is welded on the periphery of the positive/negative electrode end of the battery of the invention, and fig. 11(2) is a schematic diagram of the sealing plate welded on the periphery of the positive/negative electrode end of the battery of the invention or afterwards.
Fig. 12 is a schematic diagram of the evacuation and electrolyte replenishment at the negative terminal of a cell in accordance with the present invention.
Detailed Description
The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.
In the figure, 1 is a full-tab winding core group, 2 is a metal tube, 3 is a positive plate cover assembly, 4 is a sealing cover, 5 is an insulating sealing ring, 6 is a negative plate cover assembly, 7 is a central tube, 8 is a positive repair sheet, and 9 is a negative repair sheet.
As shown in fig. 1 and 2, the cylindrical battery designed by the present invention includes a full-tab winding assembly 1, a metal tube 2, a positive cover plate assembly 3, a sealing cover 4, an insulating sealing ring 5, a negative 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: a full-tab winding core 1-1, a positive guard ring 1-2 and a negative guard ring 1-3. The positive electrode guard ring 1-2 is buckled at the positive end of the full-lug winding core, and the negative electrode guard ring 1-3 is buckled at the negative end of the full-lug winding core.
As shown in fig. 4(1) - (3), the positive electrode cover plate assembly 3 includes: 3-0 parts of positive cover plate, 3-1 parts of positive welding area, 3-2 parts of safety valve, 3-3 parts of liquid injection hole and 3-4 parts of sealing rubber. The positive electrode welding areas 3-1 are provided with a plurality of safety valves 3-2, the gaps of the welding areas are arranged, the central area of the positive electrode cover plate component is provided with a liquid injection hole 3-3, and a sealing rubber component 3-4 is embedded below the liquid injection hole and is matched with the cavity of the positive electrode cover plate 3-0.
As shown in fig. 5(1) - (3), the negative electrode cover plate assembly 6 includes: 6-0 parts of negative electrode cover plate, 6-1 parts of negative electrode welding area, 6-2 parts of safety valve, 6-3 parts of liquid injection hole and 6-4 parts of sealing rubber piece. The negative electrode welding areas 6-1 are provided with a plurality of safety valves 6-2 arranged in the gaps of the welding areas, the central area of the negative electrode cover plate component is provided with a liquid injection hole 6-3, and a sealing rubber component 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 welding area 3-1 and the negative electrode welding area 6-1 may be designed in various shapes.
The central tube 9 can be directly rolled in when the anode, the cathode and the diaphragm are wound, and can also be placed after the full-lug winding core 1-1 is made.
And respectively shaping the positive foil and the negative foil at two ends of the full-lug winding core 1-1.
And respectively sleeving a positive guard ring 1-2 and a negative guard ring 1-3 on the two ends of the full-lug winding core 1-1, thereby completing the manufacture of the full-lug winding core group 1.
One end of the metal pipe 2 is subjected to a roll grooving process.
And putting the full-lug winding core 1 into the metal pipe 2 from one end of the non-rolling groove.
And the other end of the metal pipe 2 is rolled to be grooved, so that the full-lug winding core group 1 is fixed in the metal pipe 2.
An insulating seal ring 5 is embedded above a slot position of a rolling groove at one end of the metal tube 2, the positive cover plate component 3 is then placed into the insulating seal ring 5, and sealing among the positive cover plate component 3, the insulating seal ring 5 and the metal tube 2 is completed in a mechanical compression mode.
And an insulating seal ring 5 is embedded above the slot position of the rolling groove at the other end of the metal tube 2, then the negative plate cover assembly 6 is placed in the insulating seal ring 5, and the sealing among the negative plate cover assembly 6, the insulating seal ring 5 and the metal tube 2 is completed in a mechanical compression mode.
And welding the welding area 3-1 of the positive cover plate component and the positive end face of the full-lug winding core together in a laser welding mode.
And welding the welding area 6-1 of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode.
The tightness test can be carried out by inserting a needle through the liquid injection hole 3-3 on the positive cover plate component 3 and penetrating through the sealing rubber component 3-4 at the positive end.
If the welding area fails the sealing performance test, the positive electrode rework sheet 8 or the negative electrode rework sheet 9 is welded on the corresponding welding area.
After the battery is dried, a needle can be inserted through the liquid injection hole 3-3 on the positive cover plate component 3, the sealing rubber component 3-4 at the positive end is penetrated, electrolyte is injected, then the needle head is drawn out, and the sealing cover 4 is welded.
After formation, a needle can be inserted through the liquid injection hole 6-3 on the negative cover plate component 6, the needle penetrates through the sealing rubber component 6-4 at the negative end, electrolyte is injected, then the needle head is drawn out, and the sealing cover 4 is welded.
The specific manufacturing process is as follows:
1) the central tube 9 can be directly rolled in when the anode, the cathode and the diaphragm are wound, and can also be placed after the full-lug winding core 1-1 is made.
2) And respectively shaping the positive foil and the negative foil at two ends of the full-lug winding core 1-1.
3) And respectively sleeving a positive guard ring 1-2 and a negative guard ring 1-3 on the two ends of the full-lug winding core 1-1, thereby completing the manufacture of the full-lug winding core group 1.
4) One end of the metal pipe 2 is subjected to a roll grooving process.
5) And putting the full-lug winding core group 1 into a metal pipe 2 from one end of the non-rolling groove.
6) And the other end of the metal pipe 2 is rolled to be grooved, so that the full-lug winding core group 1 is fixed in the metal pipe 2.
7) An insulating seal ring 5 is embedded above a slot position of a rolling groove at one end of the metal tube 2, the positive cover plate component 3 is placed in the seal ring, and the positive cover plate component 3, the insulating seal ring 5 and the metal tube 2 are sealed in a mechanical compression mode.
8) And an insulating seal ring 5 is embedded above the slot position of the rolling groove at the other end of the metal tube 2, then the negative plate cover assembly 6 is placed in the insulating seal ring, and the sealing among the negative plate cover assembly 6, the insulating seal ring 5 and the metal tube 2 is completed in a mechanical compression mode.
9) And welding the welding area 3-1 of the positive cover plate component and the positive end face of the full-lug winding core together in a laser welding mode.
10) And welding the welding area 6-1 of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode.
11) The tightness test can be carried out by inserting a needle through the liquid injection hole 3-3 on the positive cover plate component 3 and penetrating through the sealing rubber component 3-4 at the positive end.
12) If the welding area fails the sealing performance test, the positive electrode rework sheet 8 or the negative electrode rework sheet 9 is welded on the corresponding welding area.
13) After the battery is dried, a needle can be inserted through the liquid injection hole 3-3 on the positive cover plate component 3, the sealing rubber component 3-4 at the positive end is penetrated, electrolyte is injected, then the needle head is drawn out, and the sealing cover 4 is welded.
14) After formation, a needle can be inserted through the liquid injection hole 6-3 on the negative cover plate component 6, the needle penetrates through the sealing rubber component 6-4 at the negative end, electrolyte is injected, then the needle head is drawn out, and the sealing cover 4 is welded.
15) Thus, the cylindrical battery having a simple structure is completed.
The above description is only for the 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 conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (10)
1. A cylindrical battery is characterized by comprising a full-lug winding core group, a metal tube, a positive plate cover plate component, an insulating sealing ring, a negative plate cover plate component and a central tube, wherein the full-lug winding core group is fixed in the metal tube; an insulating seal ring is embedded at the other end of the metal tube, the negative plate cover assembly is placed in the insulating seal ring, and the negative plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode; welding the positive plate cover plate component and the positive end face of the full-lug winding core together in a laser welding mode; and welding the negative electrode cover plate component and the negative electrode end face of the full-lug winding core together in a laser welding mode.
2. The cylindrical battery as set forth in claim 1, wherein the full tab winding core group comprises: the positive pole protective ring is buckled at the positive pole end of the full-lug winding core, and the negative pole protective ring is buckled at the negative pole end of the full-lug winding core.
3. The cylindrical battery as claimed in claim 2, wherein the positive electrode cap plate assembly comprises: anodal apron, anodal weld zone, anodal relief valve, anodal notes liquid hole, anodal sealant, anodal weld zone have a plurality of, and anodal relief valve locates anodal weld zone's clearance, and the central area of anodal apron subassembly is anodal notes liquid hole, and anodal sealant inlays in anodal notes liquid hole below to with the cavity phase-match of anodal apron.
4. The cylindrical battery as claimed in claim 3, wherein the negative electrode cap plate assembly comprises: negative pole apron, negative pole weld area, negative pole relief valve, negative pole annotate liquid hole, negative pole joint sealant, the negative pole weld area has a plurality of, and negative pole relief valve locates the clearance of negative pole weld area, and the central zone of negative pole apron subassembly is the negative pole and annotates the liquid hole, and the negative pole joint sealant inlays in negative pole notes liquid hole below to with the cavity phase-match of negative pole apron.
5. The cylindrical battery as claimed in claim 4, wherein the positive electrode welding region and the negative electrode welding region are designed in various shapes.
6. The cylindrical battery according to claim 5, wherein the positive foil and the negative foil at both ends of the full-tab winding core are respectively shaped, and a positive guard ring and a negative guard ring are respectively sleeved at both ends of the full-tab winding core, thereby completing the manufacture of the full-tab winding core set; performing slot rolling treatment on one end of the metal pipe, putting the full-lug winding core into the metal pipe from the end which is not subjected to slot rolling, and then performing slot rolling on the other end of the metal pipe, so that the full-lug winding core group is fixed in the metal pipe; an insulating seal ring is embedded above a slot position of a rolling groove at one end of the metal tube, then the positive plate cover assembly is placed in the insulating seal ring, and the positive plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode; an insulating seal ring is embedded above the slot position of the rolling groove at the other end of the metal tube, then the negative plate cover assembly is placed in the insulating seal ring, and the sealing among the negative plate cover assembly, the insulating seal ring and the metal tube is completed in a mechanical compression mode; welding a positive cover plate assembly welding area and the positive end face of the full-lug winding core together in a laser welding mode; and welding the welding area of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode.
7. The cylindrical battery as defined in claim 6, wherein the positive electrode repair piece or the negative electrode repair piece is welded to the corresponding welding area if the welding area fails the tightness test by inserting a needle through the positive electrode injection hole of the positive electrode cover plate assembly and penetrating the positive electrode sealant at the positive electrode terminal.
8. The cylindrical battery of claim 7, wherein after the battery is dried, the needle is inserted through the positive electrode injection hole on the positive electrode cover plate assembly, the positive electrode sealant penetrating the positive electrode end is injected with the electrolyte, and then the needle is withdrawn and the sealing cover is welded; after formation, a negative electrode liquid injection hole in the negative electrode cover plate assembly can be used for inserting a needle, the negative electrode sealant penetrating through the negative electrode end is used for injecting electrolyte, then the needle head is drawn out, and the sealing cover is welded.
9. A manufacturing approach of the cylindrical battery, characterized by, the positive and negative cover plate assembly has all function of battery end face welding and battery output terminal of the pole ear concurrently, weld positive cover plate assembly and positive end face of the all pole ear roll core together with the laser welding way; and welding the negative electrode cover plate component and the negative electrode end face of the full-lug winding core together in a laser welding mode.
10. The method for manufacturing a cylindrical battery as defined in claim 9, comprising the steps of:
1) the central tube is directly rolled in when the anode, the cathode and the diaphragm are wound, or the full-lug winding core is put after being made;
2) respectively shaping the positive foil and the negative foil at two ends of the full-lug winding core;
3) respectively sleeving a positive electrode guard ring and a negative electrode guard ring on two ends of the full-lug winding core, thereby completing the manufacture of the full-lug winding core group;
4) rolling a groove at one end of the metal pipe;
5) putting the full-lug winding core group into a metal pipe from one end of the non-rolling groove;
6) then, carrying out rolling groove on the other end of the metal tube, thereby fixing the full-lug winding core set in the metal tube;
7) an insulating seal ring is embedded above a slot position of a rolling groove at one end of the metal tube, then the positive plate cover assembly is placed in the insulating seal ring, and the positive plate cover assembly, the insulating seal ring and the metal tube are sealed in a mechanical compression mode;
8) an insulating seal ring is embedded above the slot position of the rolling groove at the other end of the metal tube, then the negative plate cover assembly is placed in the insulating seal ring, and the sealing among the negative plate cover assembly, the insulating seal ring and the metal tube is completed in a mechanical compression mode;
9) welding a positive cover plate assembly welding area and the positive end face of the full-lug winding core together in a laser welding mode;
10) welding the welding area of the cathode cover plate assembly and the cathode end face of the full-lug winding core together in a laser welding mode;
11) a needle can be inserted through the positive electrode liquid injection hole on the positive electrode cover plate component and penetrates through the positive electrode sealing rubber piece at the positive electrode end to carry out tightness test;
12) if the welding area fails to pass the tightness test, welding the anode repair sheet or the cathode repair sheet on the corresponding welding area;
13) after the battery is dried, a needle can be inserted through a positive electrode liquid injection hole on the positive electrode cover plate component, the needle penetrates through the positive electrode sealing rubber piece at the positive electrode end, electrolyte is injected, then the needle head is drawn out, and the sealing cover is welded;
14) after formation, a needle can be inserted through a negative electrode liquid injection hole in the negative electrode cover plate assembly, the needle penetrates through a negative electrode sealing rubber piece at the negative electrode end, electrolyte is injected, then the needle head is drawn out, and a sealing cover is welded;
15) thus, the cylindrical battery having a simple structure is completed.
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Effective date of registration: 20240506 Address after: No. 58, Yihu West Road, High tech Industrial Development Zone, Lujiang County, Hefei City, Anhui Province, 231501 Patentee after: Anhui Yizeng Power New Energy Technology Co.,Ltd. Country or region after: China Address before: 550005 station 1402-426, floor 14, building A2, Taisheng international, No. 9, Jichang Road, Shuanglong Airport Economic Zone, Guiyang, Guizhou Patentee before: Guiyang binai New Energy Technology Co.,Ltd. Country or region before: China |
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Denomination of invention: A cylindrical battery and its manufacturing method Granted publication date: 20240223 Pledgee: Industrial Bank Limited by Share Ltd. Hefei branch Pledgor: Anhui Yizeng Power New Energy Technology Co.,Ltd. Registration number: Y2024980030699 |