CN107204408B - Full-lug square lithium battery and preparation method thereof - Google Patents
Full-lug square lithium battery and preparation method thereof Download PDFInfo
- Publication number
- CN107204408B CN107204408B CN201710415562.6A CN201710415562A CN107204408B CN 107204408 B CN107204408 B CN 107204408B CN 201710415562 A CN201710415562 A CN 201710415562A CN 107204408 B CN107204408 B CN 107204408B
- Authority
- CN
- China
- Prior art keywords
- pole
- full
- positive
- cover plate
- post
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract 2
- 238000003466 welding Methods 0.000 claims description 23
- 238000004804 winding Methods 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims description 4
- 239000011226 reinforced ceramic Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 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
-
- 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
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- 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
-
- 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
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- 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
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a square lithium cell of full utmost point ear, including lithium cell shell, lithium cell shell includes the casing, the apron, the bottom plate, the casing is hollow aluminium alloy, welded fastening apron respectively at both ends, the bottom plate, the apron is equipped with annotates liquid hole and relief valve, the apron is equipped with at least one bar hole, wear to establish the negative pole utmost point post in every hole, annular fixed slot is seted up to negative pole utmost point post side, the pore wall in apron bar hole is advanced to this fixed slot inner clamping, it has the sealing washer to fill up between utmost point post and apron, the utmost point post is hollow structure, wear to establish the full utmost point ear of negative pole in it, the cross-sectional area of the hollow part of utmost point post is greater than the cross-sectional area of the full utmost point ear of negative pole, space cock strip between utmost point post and the full utmost point ear of negative pole, the little apron of the fixed negative pole of cock strip external fixation. The invention also discloses a preparation method of the full-lug square lithium battery. Compared with the prior art, the strip-shaped full tab is arranged, the surface area of the tab is enlarged, and the battery has the advantages of high production efficiency, simple process, good circularity, outstanding multiplying power performance and the like.
Description
Technical Field
The invention relates to a preparation method of a full-tab lithium battery, and belongs to the technical field of lithium batteries.
Background
At present, the lithium battery has the advantages of high energy density, high power density, multiple recycling times and the like, and is widely applied to equipment such as smart phones, wearable equipment, electric bicycles, new energy automobiles and the like, so that the lithium battery becomes a key for solving the global problems such as energy crisis, environmental pollution and the like. With the increasing perfection of electric automobile technology, electric automobiles and hybrid electric vehicles are getting closer to people's daily lives, and huge business opportunities exist, and meanwhile, electric automobiles put higher demands on the performance of lithium ion batteries for providing energy for the electric automobiles.
The hard-shell lithium battery widely used in the market at present generally adopts laminated or coiled type. The laminated square battery has the advantages of low production efficiency, poor consistency, low discharge multiplying power, short cycle life and the like, the coiled square battery has high production efficiency, but the battery generally adopts a mode of welding tab drainage, and the battery has poor multiplying power performance due to limited tab quantity and is difficult to apply to equipment of electric automobiles and energy storage terminals which need high-multiplying power discharge.
Disclosure of Invention
The invention aims to overcome the defects of the conventional square battery and designs a winding square full-tab battery. The battery has the advantages of high production efficiency, simple process, good circularity, outstanding multiplying power performance and the like.
The technical scheme of the invention is as follows:
the lithium battery shell comprises a shell body, a cover plate and a bottom plate, wherein the shell body is a hollow aluminum profile, the cover plate and the bottom plate are welded and fixed at two ends of the shell body respectively, the cover plate is provided with a liquid injection hole and a safety valve, the cover plate is provided with at least one strip-shaped hole, a negative pole post is penetrated in each hole, an annular fixing groove is formed in the side face of the negative pole post, the fixing groove is clamped into the hole wall of the strip-shaped hole of the cover plate, a sealing ring is filled between the pole post and the cover plate, the pole post is of a hollow structure, a negative pole full pole lug is penetrated in the pole post, the cross section area of a hollow part of the pole post is larger than the cross section area of the negative pole full pole lug, a space plug strip between the pole post and the negative pole full pole lug is fixed with a negative pole little cover plate outside the plug strip, and the pole full pole lug and the negative pole small cover plate are welded into a whole to form a battery negative pole; the bottom plate is provided with strip-shaped holes as many as cover plates, each hole is internally provided with a positive pole post in a penetrating way, the side face of the positive pole post is provided with an annular fixing groove, the fixing groove is internally clamped into the hole wall of the strip-shaped hole of the bottom plate, a sealing ring is arranged between the positive pole post and the bottom plate in a filling way, the positive pole post is of a hollow structure, a positive full-pole lug is internally penetrated in the hollow structure, the cross section area of the hollow part of the positive pole post is larger than that of the positive full-pole lug, a plug strip is embedded in the space between the positive pole post and the positive full-pole lug, a small positive cover plate is externally fixed on the plug strip, and the positive pole post, the positive full-pole lug and the small positive cover plate are integrally formed into a battery anode through welding; the battery shell is internally provided with an electric core, the electric core is formed by winding a multi-layer structure and is respectively provided with a diaphragm, a positive pole piece, a diaphragm, a negative pole piece and a diaphragm, the middle parts of the positive pole piece and the negative pole piece are electric energy storage parts, and the multi-layer positive pole piece and the negative pole piece at the two ends are respectively welded and fixed together to form a positive full-pole lug and a negative full-pole lug.
The pore wall of the strip-shaped hole of the cover plate is of a Z-shaped convex structure, so that the lower surface of the pole and the lower surface of the whole cover plate are positioned on the same plane, and the pore wall of the strip-shaped hole of the bottom plate is of a Z-shaped convex structure, so that the upper surface of the positive pole and the upper surface of the whole bottom plate are positioned on the same plane.
The plugs are made of elastic rubber.
All of the above welds are friction stir welds.
The preparation method of the full-lug square lithium battery comprises the following steps:
firstly, treating a cover plate, a shell and a bottom plate by adopting a micro-arc oxidation technology to form a high-quality reinforced ceramic film on the surface;
secondly, welding and fixing the bottom plate and the shell;
thirdly, winding the diaphragm, the positive electrode plate, the diaphragm, the negative electrode plate and the diaphragm in sequence to form a battery cell, and respectively welding and fixing the multi-layer positive electrode plate and the negative electrode plate at the end parts of the two ends to form a positive electrode full tab and a negative electrode full tab, wherein the left side and the right side of the positive electrode full tab and the negative electrode full tab are subjected to corner cutting;
fourthly, the battery core is put into the shell, the whole lug of the positive electrode is led out from the hollow part of the positive electrode post, a rubber plug strip is plugged in, a small positive electrode cover plate is embedded, and the small positive electrode cover plate and the positive electrode post are welded;
fifthly, covering a cover plate, leading out all lugs of the negative electrode from the hollow part of the negative electrode post, plugging in a rubber plug, embedding a small negative electrode cover plate, welding the small negative electrode cover plate, and welding the cover plate with the shell;
and sixthly, electrolyte is injected from the liquid injection hole of the cover plate and the safety valve, and the battery is formed by sealing after the electrolyte is finished.
All of the welds described above are friction stir welds.
Compared with the prior art, the strip-shaped full tab is arranged, the surface area of the tab is enlarged, and the battery has the advantages of high production efficiency, simple process, good circularity, outstanding multiplying power performance and the like.
Drawings
Fig. 1 is a front view and a top view of the general structure of the present invention.
Fig. 2 is a left side view of the general structure of the present invention.
Fig. 3 is a winding structure diagram of the battery cell of the present invention.
Fig. 4 is a schematic view of the corner cutting of the battery cell tab according to the present invention.
Fig. 5 is a diagram of the structure of the cover plate of the present invention.
Fig. 6 is a diagram of the structure of the patent chassis of the present invention.
Fig. 7 is a structural diagram of the housing of the present invention.
Detailed Description
As shown in fig. 1, a full-tab square lithium battery comprises a lithium battery shell, wherein the lithium battery shell comprises a shell 1, a cover plate 2 and a bottom plate 15, the shell 1 is a hollow aluminum profile, and the cover plate 2 and the bottom plate 15 are welded and fixed at two ends respectively. The cover plate is provided with a liquid injection hole 31 and a safety valve 32, so that electrolyte is conveniently injected. The wall thickness of the shell is 0.5mm, the cover plate and the bottom plate are all aluminum plates with the thickness of 1-1.5mm, the cover plate and the bottom plate are both provided with bipolar posts, the bottom plate is an anode post, the cover plate is provided with a cathode post, the anode post is made of aluminum, the cathode post is made of copper, the anode post and the bottom plate are provided with sealing rings, and the anode post and the bottom plate and the cathode post and the cover plate are sealed.
As shown in fig. 2 and 5, the cover plate 2 is provided with at least one strip-shaped hole (two holes in the drawing), each hole is penetrated with a negative pole post 4, the side surface of the negative pole post 4 is provided with an annular fixing groove, the fixing groove is internally clamped into the hole wall of the strip-shaped hole of the cover plate 2, a sealing ring 3 is arranged between the post 4 and the cover plate 2 in a cushioning manner, and in order to increase the internal volume, the hole wall of the strip-shaped hole of the cover plate 2 is of a Z-shaped convex structure, so that the lower surface of the post 4 and the whole lower surface of the cover plate 2 are positioned on the same plane. The pole 4 is of a hollow structure, the whole pole lug 5 of the negative electrode is penetrated in the pole 4, the cross-sectional area of the hollow part of the pole 4 is larger than that of the whole pole lug 5 of the negative electrode in order to facilitate assembly of the whole pole lug 5 of the negative electrode, after the assembly is completed, a plug 7 made of elastic rubber is embedded in a space between the pole 4 and the whole pole lug 5 of the negative electrode, a small cover plate 6 of the negative electrode is fixed outside the plug 7, and the pole 4, the whole pole lug 5 of the negative electrode and the small cover plate 6 of the negative electrode are formed into a whole through welding, so that the whole battery anode is formed.
As shown in fig. 2 and 6, the bottom plate 15 is provided with as many strip-shaped holes as the cover plate 2, each hole is penetrated with a positive pole column 8, the side surface of the positive pole column 8 is provided with a ring-shaped fixing groove, the fixing groove is internally clamped into the hole wall of the strip-shaped hole of the bottom plate 15, a sealing ring 3 is arranged between the positive pole column 8 and the bottom plate 15 in a cushioning manner, and in order to increase the internal volume, the hole wall of the strip-shaped hole of the bottom plate 15 is of a Z-shaped convex structure, so that the upper surface of the positive pole column 8 and the integral upper surface of the bottom plate 15 are positioned on the same plane. The positive pole 8 is hollow structure, wears to establish positive pole full tab 9 in it, in order to conveniently assemble positive pole full tab 9 in the pole 4, the cross-sectional area of the hollow part of positive pole 8 is greater than the cross-sectional area of positive pole full tab 9, after the assembly is accomplished, the space between positive pole 8 and positive pole full tab 9 imbeds the cock strip 7 that elastic rubber made, the external fixation positive little apron 10 of cock strip 7, become a whole through the welding between positive pole 8, positive pole full tab 9, the little apron 10 of positive pole, its whole battery negative pole that forms.
If the contour of the strip-shaped hole is close to that of the full tab, the difficulty in leading out the full tab from the hollow portion of the negative electrode tab is increased, particularly in robot assembly, and for this reason, the cross-sectional area of the hollow portion of the positive electrode tab 8 is larger than that of the positive electrode full tab 9, but this increases the instability of the connection thereof. So the gap is filled with the plug strip made of elastic rubber, and the outer side of the adhesive tape is fixed with a small cover plate for perfect combination so as not to influence the conductivity.
As shown in fig. 1, 3 and 4, a battery cell is arranged in a battery shell, the battery cell is formed by winding a multi-layer structure, the battery cell is respectively a diaphragm 13, a positive electrode plate 12, a diaphragm 13, a negative electrode plate 14 and a diaphragm 13, the middle parts of the positive electrode plate 12 and the negative electrode plate 14 are electric energy storage parts (generally two side surfaces are coated with active substances), and the end parts of the two ends of the battery cell are respectively welded and fixed with the negative electrode plate 14 to form a positive electrode full tab 9 and a negative electrode full tab 5.
In fig. 4, in order to facilitate the passing of the positive electrode full tab 9 and the negative electrode full tab 5 through the electrode posts, the left and right sides of the positive electrode full tab 9 and the negative electrode full tab 5 are cut with angles, and the cut parts are shown in a region A in fig. 4.
All of the above welds are friction stir welds.
In order to increase the strength, the cover plate, the shell and the bottom plate are all treated by adopting a micro-arc oxidation technology, so that a high-quality reinforced ceramic film layer is formed on the surface. Thus, the surface hardness of the material is greatly improved, the wear resistance is good, the heat resistance and the corrosion resistance are good, and the insulation performance is good.
The preparation method of the battery comprises the following steps:
in the first step, the cover plate, the shell and the bottom plate are all treated by adopting a micro-arc oxidation technology, so that a high-quality reinforced ceramic film is formed on the surface.
And secondly, welding and fixing the bottom plate and the shell.
And thirdly, winding the diaphragm, the positive electrode plate, the diaphragm, the negative electrode plate and the diaphragm in sequence to form an electric core, and respectively welding and fixing the multi-layer positive electrode plate and the negative electrode plate at the end parts of the two ends to form a positive electrode full tab and a negative electrode full tab, wherein the left side and the right side of the positive electrode full tab and the negative electrode full tab are subjected to corner cutting.
And fourthly, inserting the battery core into the shell, leading out the full lug of the positive electrode from the hollow part of the positive electrode post, inserting a rubber plug strip, embedding the small positive electrode cover plate, and welding the small positive electrode cover plate and the positive electrode post.
And fifthly, covering a cover plate, leading out the full lugs of the negative electrode from the hollow part of the negative electrode post, plugging in a rubber plug, embedding a small negative electrode cover plate, welding the small negative electrode cover plate, and welding the cover plate and the shell.
And sixthly, electrolyte is injected from the liquid injection hole of the cover plate and the safety valve, and the battery is formed by sealing after the electrolyte is finished.
All of the welds described above are friction stir welds.
Claims (4)
1. The utility model provides a square lithium cell of full utmost point ear, includes lithium cell shell, and lithium cell shell includes casing (1), apron (2), bottom plate (15), and casing (1) are hollow aluminium alloy, and welded fastening apron (2), bottom plate (15) are respectively at both ends, and the apron is equipped with annotates liquid hole (31) and relief valve (32), its characterized in that:
the cover plate (2) is provided with at least one strip-shaped hole, each hole is internally provided with a negative pole post (4) in a penetrating way, the side face of the negative pole post (4) is provided with an annular fixing groove, the fixing groove is internally clamped into the hole wall of the strip-shaped hole of the cover plate (2), a sealing ring (3) is arranged between the pole post (4) and the cover plate (2), the pole post (4) is of a hollow structure, a negative pole full pole lug (5) is internally penetrated, the cross-sectional area of the hollow part of the pole post (4) is larger than that of the negative pole full pole lug (5), a space plug strip (7) between the pole post (4) and the negative pole full pole lug (5) is externally fixed with a negative pole tiny cover plate (6), and the pole post (4), the negative pole full pole lug (5) and the negative pole tiny cover plate (6) are formed into a whole through welding, and the whole forms a battery negative pole;
the bottom plate (15) is provided with strip-shaped holes as many as the cover plate (2), each hole is internally provided with a positive pole post (8) in a penetrating way, the side face of the positive pole post (8) is provided with an annular fixing groove, the fixing groove is internally clamped into the hole wall of the strip-shaped hole of the bottom plate (15), a sealing ring (3) is arranged between the positive pole post (8) and the bottom plate (15), the positive pole post (8) is of a hollow structure, a positive full-pole lug (9) is internally penetrated and arranged, the cross-sectional area of the hollow part of the positive pole post (8) is larger than that of the positive full-pole lug (9), a plug strip (7) is embedded in the space between the positive pole post (8) and the positive full-pole lug (9), a positive small cover plate (10) is externally fixed between the positive pole post (8), the positive full-pole lug (9) and the positive small cover plate (10) to form a whole through welding, and the whole forms a battery positive electrode;
the battery shell is internally provided with an electric core, the electric core is formed by winding a multi-layer structure and is respectively provided with a diaphragm (13), a positive pole piece (12), a diaphragm (13), a negative pole piece (14) and a diaphragm (13), the middle parts of the positive pole piece (12) and the negative pole piece (14) are electric energy storage parts, and the end part multi-layer positive pole piece (12) and the negative pole piece (14) at two ends are respectively welded and fixed together to form a positive full-pole lug (9) and a negative full-pole lug (5);
the hole wall of the strip-shaped hole of the cover plate (2) is of a Z-shaped convex structure, so that the lower surface of the pole (4) and the lower surface of the whole cover plate (2) are positioned on the same plane, and the hole wall of the strip-shaped hole of the bottom plate (15) is of a Z-shaped convex structure, so that the upper surface of the positive pole (8) and the upper surface of the whole bottom plate (15) are positioned on the same plane;
the welding is friction stir welding.
2. The full tab square lithium battery of claim 1, wherein: the plug strip (7) is made of elastic rubber.
3. A method for preparing the full-tab square lithium battery according to claim 2, comprising the steps of: the method is characterized in that:
firstly, treating a cover plate, a shell and a bottom plate by adopting a micro-arc oxidation technology to form a high-quality reinforced ceramic film on the surface;
secondly, welding and fixing the bottom plate and the shell;
thirdly, winding the diaphragm, the positive electrode plate, the diaphragm, the negative electrode plate and the diaphragm in sequence to form a battery cell, and respectively welding and fixing the multi-layer positive electrode plate and the negative electrode plate at the end parts of the two ends to form a positive electrode full tab and a negative electrode full tab, wherein the left side and the right side of the positive electrode full tab and the negative electrode full tab are subjected to corner cutting;
fourthly, the battery core is put into the shell, the whole lug of the positive electrode is led out from the hollow part of the positive electrode post, a rubber plug strip is plugged in, a small positive electrode cover plate is embedded, and the small positive electrode cover plate and the positive electrode post are welded;
fifthly, covering a cover plate, leading out all lugs of the negative electrode from the hollow part of the negative electrode post, plugging in a rubber plug, embedding a small negative electrode cover plate, welding the small negative electrode cover plate, and welding the cover plate with the shell;
and sixthly, electrolyte is injected from the liquid injection hole of the cover plate and the safety valve, and the battery is formed by sealing after the electrolyte is finished.
4. The method for preparing the full-tab square lithium battery according to claim 3, wherein the method comprises the following steps: the welding is friction stir welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710415562.6A CN107204408B (en) | 2017-06-05 | 2017-06-05 | Full-lug square lithium battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710415562.6A CN107204408B (en) | 2017-06-05 | 2017-06-05 | Full-lug square lithium battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107204408A CN107204408A (en) | 2017-09-26 |
| CN107204408B true CN107204408B (en) | 2023-08-04 |
Family
ID=59908084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710415562.6A Active CN107204408B (en) | 2017-06-05 | 2017-06-05 | Full-lug square lithium battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107204408B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493488A (en) * | 2018-01-27 | 2018-09-04 | 林州朗坤科技有限公司 | A kind of electrochemical appliance and preparation method thereof |
| CN108461700B (en) * | 2018-02-02 | 2024-01-02 | 惠州拓邦电气技术有限公司 | High-rate full-tab lithium battery and preparation method thereof |
| CN109244526A (en) * | 2018-11-14 | 2019-01-18 | 江苏万达新能源科技股份有限公司 | A kind of novel battery |
| CN110767848A (en) * | 2019-11-21 | 2020-02-07 | 四川新敏雅电池科技有限公司 | Battery cover plate assembly and battery cell |
| CN111276663B (en) * | 2020-03-30 | 2023-04-07 | 湖北亿纬动力有限公司 | Single battery, battery module and energy storage device |
| CN112259795B (en) * | 2020-04-30 | 2022-02-15 | 蜂巢能源科技有限公司 | Battery cell assembling method and battery cell |
| EP3940877A1 (en) * | 2020-05-18 | 2022-01-19 | Ningde Amperex Technology Ltd. | Battery, and powered device provided with battery |
| CN113036228A (en) * | 2021-03-12 | 2021-06-25 | 傲普(上海)新能源有限公司 | Lithium ion battery manufacturing method and lithium ion battery |
| CN114824678A (en) * | 2022-05-26 | 2022-07-29 | 江西安驰新能源科技有限公司 | Square lithium battery and assembling method thereof |
| CN115441134B (en) * | 2022-08-16 | 2024-04-05 | 天能新能源(湖州)有限公司 | Liquid injection nozzle for lithium battery production, method for manufacturing micro-arc oxidation coating, preparation method of electrolyte and rapid liquid injection device |
| CN115411465A (en) * | 2022-09-21 | 2022-11-29 | 深圳市赛尔摩星科技有限公司 | Cylindrical battery, battery module and electric device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662004A (en) * | 2008-08-26 | 2010-03-03 | 比亚迪股份有限公司 | Battery cover board assembly, battery and battery pack, and manufacture method thereof |
| WO2012073331A1 (en) * | 2010-11-30 | 2012-06-07 | 日立ビークルエナジー株式会社 | Rechargeable battery and rechargeable battery module |
| JP2013048058A (en) * | 2011-08-29 | 2013-03-07 | Gs Yuasa Corp | Storage element and charge collector |
| JP2014049224A (en) * | 2012-08-30 | 2014-03-17 | Sanyo Electric Co Ltd | Laminate armor battery and battery pack |
| JP2014229570A (en) * | 2013-05-24 | 2014-12-08 | 日東精工株式会社 | Terminal member |
| CN104904036A (en) * | 2012-12-25 | 2015-09-09 | 株式会社杰士汤浅国际 | Electricity storage element, electricity storage element assembly and method for manufacturing electricity storage element |
| CN206774588U (en) * | 2017-06-05 | 2017-12-19 | 林州朗坤科技有限公司 | A kind of full lug quadrate lithium battery |
-
2017
- 2017-06-05 CN CN201710415562.6A patent/CN107204408B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662004A (en) * | 2008-08-26 | 2010-03-03 | 比亚迪股份有限公司 | Battery cover board assembly, battery and battery pack, and manufacture method thereof |
| WO2012073331A1 (en) * | 2010-11-30 | 2012-06-07 | 日立ビークルエナジー株式会社 | Rechargeable battery and rechargeable battery module |
| JP2013048058A (en) * | 2011-08-29 | 2013-03-07 | Gs Yuasa Corp | Storage element and charge collector |
| JP2014049224A (en) * | 2012-08-30 | 2014-03-17 | Sanyo Electric Co Ltd | Laminate armor battery and battery pack |
| CN104904036A (en) * | 2012-12-25 | 2015-09-09 | 株式会社杰士汤浅国际 | Electricity storage element, electricity storage element assembly and method for manufacturing electricity storage element |
| JP2014229570A (en) * | 2013-05-24 | 2014-12-08 | 日東精工株式会社 | Terminal member |
| CN206774588U (en) * | 2017-06-05 | 2017-12-19 | 林州朗坤科技有限公司 | A kind of full lug quadrate lithium battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107204408A (en) | 2017-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107204408B (en) | Full-lug square lithium battery and preparation method thereof | |
| CN202495523U (en) | Lithium ion battery and electrode plate thereof | |
| CN105470558A (en) | Cylindrical lithium ion battery and manufacturing method therefor | |
| CN207753113U (en) | A kind of high usage electrochemical device | |
| CN108461757B (en) | Cylindrical battery and electrode current collecting assembly and manufacturing method thereof | |
| CN102013513A (en) | Lithium ion power battery with bidirectional current collectors | |
| CN202651222U (en) | Cover plate assembly, single battery comprising cover plate assembly and battery pack | |
| CN105322196B (en) | The public flow passage sealing structure of flow battery electrode frame and encapsulating method | |
| CN113571815A (en) | Button cell and its manufacturing method | |
| CN204243090U (en) | A kind of high-performance power lithium-ion battery | |
| CN114447413A (en) | Battery cover plate and battery | |
| CN111370605A (en) | Electrochemical device and preparation method thereof | |
| CN211428262U (en) | Copper-aluminum composite pole cover plate | |
| CN218334017U (en) | Power battery shell structure and power battery structure | |
| CN217507499U (en) | Split type battery top cover assembly | |
| CN206250265U (en) | Can fluid injection lug and lithium battery | |
| CN115986341A (en) | Assembly structure of current collecting disc and cover cap, sealing assembly method and battery | |
| CN201877530U (en) | Lithium ion power battery with bidirectional current collectors | |
| CN201877491U (en) | Novel high-capacity lithium ion battery | |
| CN206774588U (en) | A kind of full lug quadrate lithium battery | |
| CN205609693U (en) | Electrochemistry energy memory | |
| CN210984547U (en) | Negative electrode lead-out structure and energy storage monomer | |
| CN109473725B (en) | Top sealing mechanism and method of soft package battery | |
| CN206820028U (en) | A kind of full lug quadrate lithium battery | |
| CN111416069A (en) | Battery cover plate structure for integrally injection molding of pole column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |