CN107507932B - Novel metal shell lithium battery and occlusion cold sealing process thereof - Google Patents
Novel metal shell lithium battery and occlusion cold sealing process thereof Download PDFInfo
- Publication number
- CN107507932B CN107507932B CN201710510367.1A CN201710510367A CN107507932B CN 107507932 B CN107507932 B CN 107507932B CN 201710510367 A CN201710510367 A CN 201710510367A CN 107507932 B CN107507932 B CN 107507932B
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- China
- Prior art keywords
- cover plate
- occlusion
- lithium battery
- shell
- hemming
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Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 37
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 238000009957 hemming Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 238000002788 crimping Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 30
- 238000000465 moulding Methods 0.000 abstract description 15
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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)
Abstract
The invention relates to the technical field of lithium battery production, in particular to a novel metal shell lithium battery occlusion cold sealing process, which comprises the following steps: and (3) carrying out snap hemming on the joint of the cover plate and the shell, and then carrying out cold stamping forming. After the method is adopted, the invention has the following advantages: 1. the occlusion cold press molding process is simple, does not need a complex welding process, and has higher molding efficiency; 2. the one-time investment of cold press molding equipment is relatively low; 3. the cold press molding process is more beneficial to energy conservation and consumption reduction, and does not consume energy of a high-power laser generator; 4. the cold press molding is beneficial to thinning the lithium battery shell and improving the battery energy density.
Description
Technical Field
The invention relates to the technical field of lithium battery production, in particular to a novel metal shell lithium battery and a biting cold sealing process thereof.
Background
Along with the development of science and technology, the development of the lithium battery industry is rapid, and higher requirements are put on the production process of the lithium battery, in particular to the sealing process of the lithium battery. The lithium battery sealing process is mainly a process for connecting a battery cover plate and a shell after the battery core is put into the shell, and the process is required to ensure the tightness of the shell and prepare for electrolyte injection of the subsequent battery.
In the current industry, a heat sealing process is mainly adopted for a metal-shell lithium battery, wherein the most widely applied process is a laser port welding process, and the processes of pre-welding detection (checking the fit clearance between a cover plate and a shell), dust removal at a welding position (shown in figure 1), pre-welding (shown in figure 2), sealing welding, welding spot inspection, air tightness detection and the like are generally required. Although laser welding is more efficient than conventional sealing processes, this process has the following disadvantages:
1. the laser welding process is complex and has a longer period. Because the laser welding has higher matching precision to the cover plate and the shell, the pre-welding detection is needed before welding, and the out-of-tolerance of the matching clearance is prevented. In order to improve the welding quality of the full seal, pre-welding is added before the full seal is welded, and meanwhile, welding defects also need to be detected after the full seal is welded, so that later-stage welding seam failure caused by the welding defects is avoided. The overall process cycle time is therefore longer.
2. The equipment investment cost is high. The lasers for pre-welding and full-seal welding are expensive, so the whole set of laser welding equipment is expensive.
3. Laser welding severely limits the development of metal-case lithium batteries. The laser welding needs certain penetration and melting width, so that certain requirements are made on the material thickness of a welding area, and the case is too thin to cause penetration, so that the tightness is affected. These intangibly add weight to the battery body, and therefore laser welding also limits battery energy density improvement.
The Chinese patent application CN 102655226A discloses a power type plastic shell lithium battery sealing process, a new lithium battery problem formed by stacking positive and negative plates is filled into a plastic shell, a single positive output pole and a single negative output pole are respectively arranged at two ends of a battery core, corresponding positive and negative holes are reserved at the upper part of the shell, the battery core is placed into the battery shell before heat sealing, the accurate correspondence of the pole position holes at the upper part of the pole and the shell is ensured, the battery shell containing the battery core is inverted on a welding machine fixture, and the bottom of the battery shell and the battery shell are connected together through a hot plate welding machine, so that a closed space body is formed. And welding the lower end surface of the battery shell with the bottom of the battery shell by heating.
Disclosure of Invention
The invention aims to provide a metal-shell lithium battery with simple process and low cost and a sealing process thereof.
In order to solve the technical problems, the novel metal shell lithium battery occluding cold sealing process comprises the steps of occluding and curling the joint of the cover plate and the shell, and then cold stamping and forming.
Further, the air tightness is detected after the cold stamping forming.
Further, the engagement hemming sequentially comprises upward engagement, downward hemming tightening and transverse extrusion compaction.
Further, the step of snap crimping is specifically as follows:
Step ①: upwards snapping, namely inserting the snapping bulge of the shell into the P-shaped snapping curled edge part from the opening part of the cover plate upwards for snapping;
step ②: the downward curled edge is tightened, and the cover plate is tightened;
step ③: and transversely extruding and pressing, and pressing the clamping hemming parts and the engaging protrusions on two sides of the clamping hemming parts of the cover plate to form a sealing engaging part of the seal.
The invention also comprises a novel metal shell lithium battery, which comprises a shell and a cover plate, wherein two sides of the upper end of the shell are provided with engaging protrusions extending obliquely downwards, two sides of the cover plate are provided with P-shaped non-closed engaging curled edges extending obliquely upwards, and the engaging curled edges are adapted to the engaging protrusions.
Further, an engagement folding part is arranged between the two sides of the cover plate and the clamping curled edge part.
Further, the upper end of the cover plate 2 is connected with an electrode 3.
After the method and the structure are adopted, the invention has the following advantages:
1. the occlusion cold press molding process is simple, does not need a complex welding process, and has higher molding efficiency;
2. the one-time investment of cold press molding equipment is relatively low;
3. the cold press molding process is more beneficial to energy conservation and consumption reduction, and does not consume energy of a high-power laser generator;
4. The cold press molding is beneficial to thinning the lithium battery shell and improving the battery energy density.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic diagram of dust removal according to the background art of the invention.
FIG. 2 is a schematic view of laser pre-welding at the joint of the cover plate and the housing in the background of the invention.
Fig. 3a is a schematic view of the structure of the housing of the present invention.
Fig. 3b is a schematic diagram of the structure of the cover plate of the present invention.
Fig. 4 is a schematic diagram of a snap-in cold seal structure of a metal-shell lithium battery of the present invention.
Fig. 5 is an enlarged schematic view of the portion a of fig. 4 according to the present invention.
In the figure: 1 is a shell, 2 is a cover plate, 3 is an electrode, 4 is a seal
101 Is a snap projection, 201 is a snap folded portion, 202 is a snap bead portion, 203 is an opening portion, 401 is a seal snap portion
Detailed Description
As shown in fig. 3a, 3b and 5, according to the novel metal shell lithium battery occlusion cold sealing process, occlusion hemming is carried out on the joint of the cover plate and the shell, and then cold stamping forming is carried out. Wherein the housing is shown in fig. 3a and the cover plate is shown in fig. 3 b.
Further, the air tightness is detected after the cold stamping forming.
Further, the snap bead specifically includes an upward snap ①, a downward bead tightening ②, and a lateral extrusion compaction ③ in sequence, which is specifically as follows:
Step ①: upwards snapping, namely inserting the snapping bulge of the shell into the P-shaped snapping curled edge part from the opening part of the cover plate upwards for snapping;
step ②: the downward curled edge is tightened, and the cover plate is tightened;
step ③: and transversely extruding and pressing, and pressing the clamping hemming parts and the engaging protrusions on two sides of the clamping hemming parts of the cover plate to form a sealing engaging part of the seal.
The invention has the following advantages:
1. the occlusion cold press molding process is simple, does not need a complex welding process, and has higher molding efficiency;
2. The cold press molding equipment has low one-time investment cost.
3. The cold press molding process is more beneficial to energy conservation and consumption reduction, and does not consume energy of the high-power laser generator.
4. The cold press molding is beneficial to thinning the lithium battery shell and improving the battery energy density.
As shown in fig. 3a, 3b, 4 and 5, the invention further comprises a novel metal-shell lithium battery, which comprises a shell 1 and a cover plate 2, wherein two sides of the upper end of the shell 1 are provided with engaging protrusions 101 extending obliquely downwards, two sides of the cover plate 2 are provided with P-shaped non-closed engaging curled edges 202 extending obliquely upwards, an opening 203 is formed at the non-closed position, and the engaging curled edges 202 are suitable for the engaging protrusions 101. The upper end of the cover plate 2 is connected with an electrode 3, and the electrode 3 comprises an anode output pole and a cathode output pole.
Further, the engagement folding portion 201 is arranged between the two sides of the cover plate and the clamping curled edge portion, so that liquid leakage in the lithium battery shell can be effectively prevented.
As shown in fig. 4 and 5, the snap hemming process is as follows:
Step ①: the snap-in protrusion 101 of the housing 1 is snapped upward from the opening 203 of the cover plate 2 into the P-shaped snap-in curled edge 202;
Step ②: the downward curled edge is tightened, and the cover plate 2 is tightened;
Step ③: the clamping and crimping parts 202 and the engaging protrusions 101 are pressed and compacted on both sides of the clamping and crimping parts 202 of the cover plate 2 to form a sealing engaging part 401 of the sealing 4.
While particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely illustrative, and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined only by the appended claims.
Claims (7)
1. The novel metal shell lithium battery occlusion cold sealing process is characterized by comprising the following steps of: the method comprises the steps of carrying out occlusion hemming on the joint of a cover plate and a shell, and then carrying out cold stamping forming, wherein occlusion folding parts are arranged on two sides of the cover plate, occlusion protrusions extending obliquely downwards are arranged on two sides of the upper end of the shell, P-shaped non-closed occlusion hemming parts extending obliquely upwards are arranged on two sides of the cover plate, and the occlusion hemming parts are adapted to the occlusion protrusions; the engagement projection can be inserted directly into the snap bead.
2. The novel metal shell lithium battery occlusion cold sealing process as claimed in claim 1, wherein the process comprises the following steps of: and (5) performing air tightness detection after the cold stamping forming.
3. A novel metal shell lithium battery occlusion cold sealing process according to claim 1 or 2, characterized in that: the engagement hemming sequentially comprises upward engagement, downward hemming tightening and transverse extrusion compaction.
4. A novel metal shell lithium battery snap-in cold sealing process according to claim 3, wherein said step of snap-in crimping is specifically as follows:
Step ①: upwards snapping, namely inserting the snapping bulge of the shell into the P-shaped snapping curled edge part from the opening part of the cover plate upwards for snapping;
step ②: the downward curled edge is tightened, and the cover plate is tightened;
step ③: and transversely extruding and pressing, and pressing the clamping hemming parts and the engaging protrusions on two sides of the clamping hemming parts of the cover plate to form a sealing engaging part of the seal.
5. A novel metal-case lithium battery comprising a case and a cover plate, formed based on the process of any one of claims 1-4, characterized in that: the two sides of the upper end of the shell are provided with engaging protrusions extending obliquely downwards, the two sides of the cover plate are provided with P-shaped non-closed engaging curled edges extending obliquely upwards, and the engaging curled edges are adapted to the engaging protrusions; the engagement projection can be inserted directly into the snap bead.
6. A novel metal-case lithium battery according to claim 5, wherein: and a meshing folding part is arranged between the two sides of the cover plate and the clamping hemming part.
7. A novel metal-case lithium battery according to claim 5, wherein: and the cover plate end is connected with an electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510367.1A CN107507932B (en) | 2017-06-28 | 2017-06-28 | Novel metal shell lithium battery and occlusion cold sealing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510367.1A CN107507932B (en) | 2017-06-28 | 2017-06-28 | Novel metal shell lithium battery and occlusion cold sealing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107507932A CN107507932A (en) | 2017-12-22 |
| CN107507932B true CN107507932B (en) | 2024-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710510367.1A Active CN107507932B (en) | 2017-06-28 | 2017-06-28 | Novel metal shell lithium battery and occlusion cold sealing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107507932B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923070B (en) * | 2018-06-12 | 2020-12-15 | 北京英耐时新能源科技有限公司 | Packaging method and device of lithium ion battery |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH205257A (en) * | 1937-11-09 | 1939-06-15 | Saml Hanson & Son Limited | Flanging device for the production of terminations on sheet metal containers. |
| JPH1034264A (en) * | 1996-07-22 | 1998-02-10 | Konno Kogyosho:Kk | Production of flageless container by cold pressure joining |
| JPH11267779A (en) * | 1998-03-20 | 1999-10-05 | Konno Kogyosho:Kk | Production of blind container |
| JP2010027411A (en) * | 2008-07-21 | 2010-02-04 | Toyota Motor Corp | Sealed battery |
| CN104488108A (en) * | 2012-07-16 | 2015-04-01 | 罗伯特·博世有限公司 | Battery cell and method for closing the battery cell |
| CN205508890U (en) * | 2016-04-13 | 2016-08-24 | 深圳市沃特玛电池有限公司 | Lithium ion battery |
| CN205881970U (en) * | 2015-11-15 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Cylindrical lithium ion battery's packaging structure |
-
2017
- 2017-06-28 CN CN201710510367.1A patent/CN107507932B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH205257A (en) * | 1937-11-09 | 1939-06-15 | Saml Hanson & Son Limited | Flanging device for the production of terminations on sheet metal containers. |
| JPH1034264A (en) * | 1996-07-22 | 1998-02-10 | Konno Kogyosho:Kk | Production of flageless container by cold pressure joining |
| JPH11267779A (en) * | 1998-03-20 | 1999-10-05 | Konno Kogyosho:Kk | Production of blind container |
| JP2010027411A (en) * | 2008-07-21 | 2010-02-04 | Toyota Motor Corp | Sealed battery |
| CN104488108A (en) * | 2012-07-16 | 2015-04-01 | 罗伯特·博世有限公司 | Battery cell and method for closing the battery cell |
| CN205881970U (en) * | 2015-11-15 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Cylindrical lithium ion battery's packaging structure |
| CN205508890U (en) * | 2016-04-13 | 2016-08-24 | 深圳市沃特玛电池有限公司 | Lithium ion battery |
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| Publication number | Publication date |
|---|---|
| CN107507932A (en) | 2017-12-22 |
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| CB02 | Change of applicant information |
Address after: 213200 Jiangdong Avenue 1, Jintan District, Jiangsu, Changzhou Applicant after: AVIC lithium Technology Co.,Ltd. Address before: 213200 Jiangdong Avenue 1, Jintan District, Jiangsu, Changzhou Applicant before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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| CB02 | Change of applicant information |
Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant after: AVIC lithium Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC lithium Technology Co.,Ltd. Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC lithium Technology Co.,Ltd. |
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