CN109326744B - Hard shell packaging structure of lithium ion battery and processing method thereof - Google Patents
Hard shell packaging structure of lithium ion battery and processing method thereof Download PDFInfo
- Publication number
- CN109326744B CN109326744B CN201811066343.2A CN201811066343A CN109326744B CN 109326744 B CN109326744 B CN 109326744B CN 201811066343 A CN201811066343 A CN 201811066343A CN 109326744 B CN109326744 B CN 109326744B
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- Prior art keywords
- grooves
- substrate
- positive
- enclosure
- electrode lug
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 10
- 238000003672 processing method Methods 0.000 title abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000007704 transition Effects 0.000 claims abstract description 5
- 238000000016 photochemical curing Methods 0.000 abstract description 5
- 238000007639 printing Methods 0.000 abstract description 4
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 239000011149 active material Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
-
- 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)
- Sealing Battery Cases Or Jackets (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a hard shell packaging structure of a lithium ion battery and a processing method thereof, wherein the hard shell packaging structure consists of a substrate, a surrounding baffle and a buckle cover, the substrate is provided with positive and negative electrode lug leading-out grooves and extended grooves of leading-out ends thereof, the substrate between the two electrode lug leading-out grooves is provided with two groups of equally spaced radial grooves which are alternately embedded into positive and negative electrode plate current collectors, rectangular surrounding baffle embedded grooves are arranged on the peripheries of the positive and negative electrode lug leading-out grooves of the substrate, bosses which are in interference fit with the surrounding baffle embedded grooves are arranged on the bottom surface of the surrounding baffle, cambered surface grooves which respectively correspond to the corresponding electrode lug leading-out grooves are arranged on the bosses, and the buckle cover is in interference fit with the outer edges of the surrounding baffle. The substrate, the enclosure and the buckle cover in the hard shell packaging assembly are formed in one step by printing a photosensitive resin material through a photocuring 3d printer, the formed piece is a photosensitive resin primary-color transparent body, and the radial grooves are in transition fit with embedded laser-cut positive and negative current collectors, namely an aluminum plate and a pure copper plate. The invention has the outstanding advantages of convenient processing and assembly, labor hour saving and suitability for large-scale production.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a hard shell packaging structure of a lithium ion battery and a processing method thereof.
Background
The development of the battery packaging technology has been well-established, and the current commercial lithium batteries are two-dimensional lithium batteries, namely, positive and negative electrode plates are in a parallel superposition or winding structure, and the structure has the defects that the contradiction exists between the energy density and the power density, namely, in order to improve the battery capacity and the energy density, the more active materials coated on the electrode plates are, the better the battery capacity is, because the battery capacity is related to the total amount of the active materials participating in the electrochemical reaction, but with the increase of the thickness of the active materials, the transmission distance of lithium ions in the electrodes is increased, so that the power density is reduced, and the high rate performance of the battery is deteriorated. Therefore, the power density limits the increase of the thickness of the pole piece, and the thickness of the electrode pole piece generally does not exceed 150 μm.
Energy density and power density are a pair of contradictions in a two-dimensional battery, and in order to obtain a lithium battery with excellent comprehensive performance, the energy density and the power density of the battery must be balanced, so that the concept of the three-dimensional lithium battery and a product thereof are generated at the same time, but the hard shell packaging of the three-dimensional lithium battery has the defects of complicated steps and time-consuming operation.
Disclosure of Invention
The invention discloses a hard shell packaging structure of a lithium ion battery and a processing method thereof, aiming at solving the technical problems of complicated steps and time-consuming operation of the hard shell packaging of the existing three-dimensional lithium battery.
The invention discloses a hard shell packaging structure of a lithium ion battery, which is characterized by comprising a substrate, a surrounding baffle and a buckle cover, wherein the substrate is provided with longitudinal positive and negative electrode lug leading-out grooves and extending grooves of leading-out ends thereof, the extending grooves of the positive and negative electrode lug leading-out grooves are respectively positioned at one end opposite to the substrate, the substrate between the two electrode lug leading-out grooves is provided with two groups of equally spaced radial grooves in which positive and negative electrode plate current collectors are embedded alternately, one group of radial grooves is communicated with the positive electrode lug leading-out grooves, the other group of radial grooves is communicated with the negative electrode lug leading-out grooves, rectangular surrounding baffle embedding grooves are arranged on the peripheries of the positive and negative electrode lug leading-out grooves of the substrate, bosses in interference fit with the surrounding baffle embedding grooves are arranged on the bottom surface of the surrounding baffle, cambered surface grooves corresponding to the corresponding electrode lug leading-out grooves are respectively arranged on the bosses, and the buckle cover is in interference fit with the outer edge of the surrounding baffle.
The invention can also adopt the following technical measures:
the width of the radial groove is 1.1-1.2mm, and the groove depth of the radial groove is equal to the thickness of the positive and negative pole piece current collectors.
The base plate, the enclosing barrier and the buckle cover are transparent bodies.
The processing method of the hard shell packaging structure of the lithium ion battery comprises the following steps: the substrate, the enclosing barrier and the buckle cover in the hard shell packaging component are formed in one step by printing a photosensitive resin material through a photocuring 3d printer, the formed part is a photosensitive resin primary-color transparent body, the substrate, the enclosing barrier, the joint of the enclosing barrier and the buckle cover are in interference fit, and the radial groove is in transition fit with embedded laser-cut positive and negative current collectors, namely an aluminum plate and a pure copper plate.
The invention has the advantages that: the packaging structure can form a complete internal circuit by respectively embedding positive and negative pole piece current collectors and positive and negative lugs attached with active materials in radial grooves of a substrate. The enclosure and the substrate, the buckle cover and the enclosure are respectively connected in an interference fit manner by mechanical extrusion, so that the connection manner of gluing in the prior art is changed, the packaging time is effectively saved, and a series of defects of influencing the electrochemical performance of the battery due to the reaction of the glue and the electrolyte can be avoided. The packaging structure is used for dropwise adding the electrolyte to the inner side of the enclosure before assembling the buckle cover, and the buckle cover is buckled after dropwise adding is finished, so that the packaging of the single battery can be simply and conveniently completed. The base plate, the enclosing barrier and the buckle cover are printed by the photosensitive resin material through the photocuring 3d printer and are molded into the photosensitive resin primary color transparent body in one step, so that the change of the internal structure of the battery after the battery is packaged is observed conveniently, and the quality of the battery is ensured; the photocuring 3d printing processing technology is mature, the precision is high, and the interference fit of the base plate and the joint of the enclosure and the buckle cover can be met; the aluminum plate and the pure copper plate which form the positive and negative current collectors are cut by laser, and the sizes of the aluminum plate and the pure copper plate are in transition fit with the corresponding radial grooves so as to be firmly combined. The invention has the outstanding advantages of convenient processing and assembly, labor hour saving and suitability for large-scale production.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is an enlarged schematic view of the substrate structure in the embodiment of fig. 1.
Fig. 3 is a schematic view of the enclosure structure in the embodiment of fig. 1.
Fig. 4 is an enlarged cross-sectional view of fig. 1A-base:Sub>A.
The labels in the figure are: the structure comprises a base plate 1, a positive tab leading-out groove 1-1, a negative tab leading-out groove 1-2, an expansion groove 1-3, a positive plate current collector groove group 1-4, a negative plate current collector groove group 1-5, a baffle embedding groove 1-6, a buckle cover 2, a buckle cover boss 2-1, a baffle 3, a boss 3-1 and a cambered surface groove 3-2.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the hard shell packaging structure of the lithium ion battery comprises a substrate 1, a surrounding barrier 3 and a buckle cover 2, wherein the substrate 1 is provided with a longitudinal positive electrode tab leading-out groove 1-1, a longitudinal negative electrode tab leading-out groove 1-2 and extension grooves 1-3 of leading-out ends thereof, and the extension grooves 1-3 of the positive electrode tab leading-out groove and the negative electrode tab leading-out groove are respectively positioned at one opposite ends of the substrate 1. The enlarged area of the expanded groove 1-3 facilitates measurement of electrochemical performance.
The substrate 1 between the two pole ear leading-out grooves is provided with two groups of equally spaced radial grooves which are alternately embedded into positive and negative pole piece current collectors, namely positive pole piece current collector groove groups 1-4 and negative pole piece current collector groove groups 1-5, wherein the positive pole piece current collector groove groups 1-4 are communicated with the positive pole ear leading-out grooves 1-1, and the negative pole piece current collector groove groups 1-5 are communicated with the negative pole ear leading-out grooves 1-2.
The width of the radial groove of the embodiment is 1.1-1.2mm, and the groove depth of the radial groove is equal to the thickness of the current collectors of the positive and negative pole pieces.
Rectangular surrounding baffle embedded grooves 1-6 are arranged on the peripheries of the positive electrode tab leading-out groove 1-1 and the negative electrode tab leading-out groove 1-2 of the substrate 1.
The bottom surface of the enclosure 3 shown in the figure 3 is provided with a boss 3-1 which is in interference fit with the enclosure embedded groove 1-6, and the boss is provided with cambered surface grooves 3-2 which respectively correspond to the corresponding lug lead-out grooves.
The buckle cover 2 shown in the figure 4 is provided with a buckle cover boss 2-1, the shape and the size of the inner wall of the buckle cover boss are the same as those of the outer edge of the enclosure, and the buckle cover boss 2-1 is in interference fit with the outer edge of the enclosure 3.
The substrate 1, the enclosure 3 and the buckle cover 2 of the embodiment are formed by printing photosensitive resin materials through a photocuring 3d printer in one step, the formed parts of the substrate, the enclosure and the buckle cover are photosensitive resin primary color transparent bodies, and the substrate is in interference fit with the joint parts of the enclosure, the enclosure and the buckle cover. The radial grooves are in transition fit with embedded laser-cut positive and negative current collectors, namely an aluminum plate and a pure copper plate, so that the aluminum plate and the pure copper plate are not easy to fall off.
Claims (1)
1. Lithium ion battery crust packaging structure, its characterized in that: the packaging structure comprises a substrate, an enclosure and a buckle cover, wherein the substrate is provided with longitudinal positive and negative electrode lug lead-out grooves and extended grooves of lead-out ends thereof, the extended grooves of the positive and negative electrode lug lead-out grooves are respectively positioned at one end opposite to the substrate, two groups of equally spaced radial grooves which are alternately embedded into positive and negative electrode plate current collectors are arranged on the substrate between the two electrode lug lead-out grooves, one group of radial grooves is communicated with the positive electrode lug lead-out grooves, the other group of radial grooves is communicated with the negative electrode lug lead-out grooves, rectangular enclosure embedded grooves are arranged at the peripheries of the positive and negative electrode lug lead-out grooves of the substrate, bosses which are in interference fit with the enclosure embedded grooves are arranged at the bottom surface of the enclosure, cambered surface grooves which respectively correspond to the corresponding electrode lug lead-out grooves are arranged on the bosses, and the buckle cover is in interference fit with the outer edges of the enclosure; the width of the radial groove is 1.1-1.2mm, and the groove depth of the radial groove is equal to the thickness of the positive and negative pole piece current collectors; the substrate, the enclosure and the buckle cover in the hard shell packaging composition are printed and formed in one step by a light-sensitive resin material through a light-curing 3d printer, the formed part is a light-sensitive resin primary color transparent body, and the substrate is in interference fit with the joint parts of the enclosure, the enclosure and the buckle cover; the radial grooves are in transition fit with embedded laser-cut positive and negative current collectors, namely an aluminum plate and a pure copper plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066343.2A CN109326744B (en) | 2018-09-13 | 2018-09-13 | Hard shell packaging structure of lithium ion battery and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066343.2A CN109326744B (en) | 2018-09-13 | 2018-09-13 | Hard shell packaging structure of lithium ion battery and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109326744A CN109326744A (en) | 2019-02-12 |
| CN109326744B true CN109326744B (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811066343.2A Active CN109326744B (en) | 2018-09-13 | 2018-09-13 | Hard shell packaging structure of lithium ion battery and processing method thereof |
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| CN112071643B (en) * | 2020-08-26 | 2022-02-18 | 中国科学院深圳先进技术研究院 | Preparation method of thin film capacitor and thin film capacitor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022571A (en) * | 2013-01-05 | 2013-04-03 | 山东久力电子科技有限公司 | Stacked square power lithium-ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101615664A (en) * | 2009-03-31 | 2009-12-30 | 深圳市吉阳自动化科技有限公司 | Lug processing method |
| CN201820840U (en) * | 2010-10-13 | 2011-05-04 | 张勇 | Storage battery |
| CN202585596U (en) * | 2011-11-17 | 2012-12-05 | 昆山金鼎新能源科技有限公司 | Storage battery with high energy |
| CN103123959A (en) * | 2011-11-17 | 2013-05-29 | 昆山金鼎新能源科技有限公司 | Storage battery with high energy |
| CN203690428U (en) * | 2014-01-14 | 2014-07-02 | 浙江超威创元实业有限公司 | Novel safety cell lamination structure |
| KR102650963B1 (en) * | 2016-02-25 | 2024-03-25 | 삼성에스디아이 주식회사 | Electrode assembly, lithium battery including the same, and method of manufacturing the electrode assembly |
| JP6888937B2 (en) * | 2016-10-07 | 2021-06-18 | 三洋化成工業株式会社 | Battery manufacturing method |
| CN107425198B (en) * | 2017-07-28 | 2020-01-10 | 海口博澳国兴新能源科技有限公司 | Monomer ultra-high-capacity polymer lithium ion battery and manufacturing method thereof |
| CN208923206U (en) * | 2018-09-13 | 2019-05-31 | 深圳光韵达机电设备有限公司 | Lithium ion battery hard shell encapsulating structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022571A (en) * | 2013-01-05 | 2013-04-03 | 山东久力电子科技有限公司 | Stacked square power lithium-ion battery |
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| CN109326744A (en) | 2019-02-12 |
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