CN111900271A - High-heat-resistance lithium battery - Google Patents
High-heat-resistance lithium battery Download PDFInfo
- Publication number
- CN111900271A CN111900271A CN202010503581.6A CN202010503581A CN111900271A CN 111900271 A CN111900271 A CN 111900271A CN 202010503581 A CN202010503581 A CN 202010503581A CN 111900271 A CN111900271 A CN 111900271A
- Authority
- CN
- China
- Prior art keywords
- battery
- negative pole
- positive pole
- pole piece
- negative
- 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.)
- Pending
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 6
- 239000003365 glass fiber Substances 0.000 claims abstract description 6
- -1 polypropylene Polymers 0.000 claims abstract description 6
- 229920001155 polypropylene Polymers 0.000 claims abstract description 6
- 239000003792 electrolyte Substances 0.000 claims abstract description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002241 glass-ceramic Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 229920006254 polymer film Polymers 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a high-heat-resistance lithium battery, which comprises a sealed battery shell, wherein a battery core is arranged in the battery shell, a heat-resistant layer is filled between the battery shell and the battery core, the battery core is provided with a plurality of groups of positive pole pieces and negative pole pieces which are sequentially stacked, a diaphragm is arranged between the adjacent positive pole pieces and negative pole pieces, the surface of the diaphragm is uniformly provided with a plurality of micropores, and electrolyte is filled between the positive pole pieces and the negative pole pieces. The invention adopts the polypropylene polymer film, has strong corrosion resistance and good heat-resisting effect, and micropores are uniformly arranged on the surface of the film, thereby improving the liquid hanging capacity of the diaphragm and keeping the use stability of the battery; a heat-resistant layer made of glass fiber or ceramic fiber is arranged between the battery shell and the battery core, and the heat-resistant layer has good fire resistance, high temperature resistance and high mechanical strength; the positive electrode lug and the negative electrode lug are both nickel lugs and are fixed by laser welding, so that the problem that the lugs are easy to break is solved; the current collector of the negative electrode is a double-sided polished iron foil, which is cheaper than an aluminum foil, and is economical and applicable.
Description
Technical Field
The invention relates to a high-heat-resistance lithium battery, and belongs to the technical field of lithium batteries.
Background
Lithium batteries have wide applications in electric vehicles and mobile power storage devices. The lithium battery has the advantages of long service life, high energy storage efficiency, no pollution and the like, and is key energy storage equipment for solving the future energy crisis and environmental crisis. The development of the battery industry is changing day by day, more high-performance batteries emerge, the requirements of life and production of human society are met, and the lithium battery with better comprehensive performance is better and faster pushed out on the basis of continuous innovation of the technology, so that the lithium battery is the responsibility of people in the technical field to be used up in the working range.
Disclosure of Invention
In order to solve the technical problems, the invention provides a lithium battery with high heat resistance, which has the following specific technical scheme:
high heat resistance's lithium cell, including sealed battery case, the inside battery core that is provided with of battery case, it has the heat-resistant layer to fill between battery case and the battery core, the battery core is provided with a plurality of groups positive pole piece and the negative pole piece that stacks gradually, is provided with the diaphragm between adjacent positive pole piece and the negative pole piece, a plurality of micropore has evenly been seted up on the diaphragm surface, still packs between positive pole piece and the negative pole piece and has electrolyte.
Furthermore, all the positive pole pieces are combined and connected with a positive pole lug welding part, the positive pole lug welding part is connected with a positive pole lug, and the positive pole lug welding part is positioned on the surface of one end of the battery shell;
all negative pole piece integrated connection has negative pole utmost point ear weld part, negative pole utmost point ear weld part be connected with negative pole utmost point ear, negative pole utmost point ear weld part is located battery case surface and sets up with anodal utmost point ear weld part homonymy.
Furthermore, the positive pole piece is provided with a positive pole current collector and a graphene layer coated on the surface of the positive pole current collector, and the negative pole piece is provided with a negative pole current collector and a lithium metal layer coated on the surface of the negative pole current collector.
Furthermore, the welding part of the positive electrode lug and the welding part of the negative electrode lug and the negative electrode lug are fixed through laser welding.
Further, the diaphragm is a polypropylene polymer diaphragm.
Further, the positive current collector is a double-sided polished aluminum foil and is coated on the surface of the positive pole piece, and the negative current collector is a double-sided polished iron foil and is coated on the surface of the negative pole piece.
Furthermore, the battery shell is a nickel-plated aluminum shell.
Further, the heat-resistant layer is made of ceramic fibers or glass fibers.
The invention has the beneficial effects that:
the invention adopts the polypropylene polymer film, has strong corrosion resistance and good heat-resisting effect, and micropores are uniformly arranged on the surface of the film, thereby improving the liquid hanging capacity of the diaphragm and keeping the use stability of the battery; a heat-resistant layer made of glass fiber or ceramic fiber is arranged between the battery shell and the battery core, and the heat-resistant layer has good fire resistance, high temperature resistance and high mechanical strength; the positive electrode lug and the negative electrode lug are both nickel lugs and are fixed by laser welding, so that the problem that the lugs are easy to break is solved; the optimized design of the positive current collector of the positive pole piece, the graphene layer coated on the surface of the positive current collector, the negative current collector of the negative pole piece and the lithium metal layer coated on the surface of the negative current collector improves the negative capacity and reduces the internal resistance, and the lithium battery has the advantages of good multiplying power performance, good cycle performance and good safety; the current collector of the negative electrode is a double-sided polished iron foil, which is cheaper than an aluminum foil, and is economical and applicable.
Drawings
Figure 1 is a front view of the present invention,
figure 2 is a left side view of the present invention,
figure 3 is a schematic diagram of a cell structure of the present invention,
in the figure: 1-battery shell, 2-negative pole lug welding part, 3-negative pole lug, 4-positive pole lug, 5-positive pole lug welding part, 6-positive pole piece, 7-diaphragm, 8-negative pole piece, 9-graphene layer, 10-double-sided smooth aluminum foil, 11-double-sided smooth iron foil and 12-lithium metal layer.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 and 3, the lithium battery with high heat resistance of the present invention includes a sealed battery case 1, and the battery case 1 is a nickel-plated aluminum case. A battery core is arranged in the battery shell 1, a heat-resistant layer is filled between the battery shell 1 and the battery core, and the heat-resistant layer is made of ceramic fibers or glass fibers. The battery core is provided with a positive pole piece 6 and a negative pole piece 8, the positive pole piece 6 is provided with a positive current collector and a graphene layer 9 coated on the surface of the positive current collector, and the negative pole piece 8 is provided with a negative current collector and a lithium metal layer 12 coated on the surface of the negative current collector. The positive current collector is a double-sided polished aluminum foil 10 coated on the surface of the positive pole piece 6, and the negative current collector is a double-sided polished iron foil 11 coated on the surface of the negative pole piece 8. Electrolyte is filled between the positive pole piece 6 and the negative pole piece 8, a diaphragm 7 is arranged between the positive pole piece 6 and the negative pole piece 8, the diaphragm 7 is a polypropylene polymer diaphragm, and micropores are uniformly formed in the surface of the diaphragm 7. Anodal pole piece 6, diaphragm 7, negative pole piece 8 stacks gradually the setting, anodal pole piece 6 combined connection has anodal utmost point ear welding portion 5, anodal utmost point ear welding portion 5 is connected with anodal utmost point ear 4, anodal utmost point ear welding portion 5 is located 1 one end surface of battery housing, 8 combined connection has negative pole ear welding portion 2 of negative pole piece, negative pole ear welding portion 2 is connected with negative pole utmost point ear 3, negative pole ear welding portion 2 is located battery housing 1 surface and sets up with anodal utmost point ear welding portion 5 homonymy, anodal utmost point ear 4 is nickel utmost point ear with negative pole utmost point ear 3, anodal utmost point ear 4 and anodal utmost point ear welding portion 5, negative pole utmost point ear 3 all fixes through laser.
The invention adopts the polypropylene polymer film, has strong corrosion resistance and good heat-resisting effect, and micropores are uniformly arranged on the surface of the film, thereby improving the liquid hanging capacity of the diaphragm and keeping the use stability of the battery; a heat-resistant layer made of glass fiber or ceramic fiber is arranged between the battery shell and the battery core, and the heat-resistant layer has good fire resistance, high temperature resistance and high mechanical strength; the positive electrode lug and the negative electrode lug are both nickel lugs and are fixed by laser welding, so that the problem that the lugs are easy to break is solved; the optimized design of the positive current collector of the positive pole piece, the graphene layer coated on the surface of the positive current collector, the negative current collector of the negative pole piece and the lithium metal layer coated on the surface of the negative current collector improves the negative capacity and reduces the internal resistance, and the lithium battery has the advantages of good multiplying power performance, good cycle performance and good safety; the current collector of the negative electrode is a double-sided polished iron foil, which is cheaper than an aluminum foil, and is economical and applicable.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A lithium battery having high heat resistance, characterized in that: including sealed battery case (1), battery case (1) inside is provided with the battery core, and it has the heat-resistant layer to fill between battery case and the battery core, the battery core is provided with positive pole piece (6) and negative pole piece (8) that a plurality of groups range upon range of in proper order, is provided with diaphragm (7) between adjacent positive pole piece (6) and negative pole piece (8), a plurality of micropore has evenly been seted up on diaphragm (7) surface, and it has electrolyte still to fill between positive pole piece (6) and the negative pole piece (8).
2. A lithium battery with high heat resistance according to claim 1, characterized in that: all the positive pole pieces (6) are connected with a positive pole lug welding part (5) in a combined mode, the positive pole lug welding part (5) is connected with a positive pole lug (4), and the positive pole lug welding part (5) is located on the surface of one end of the battery shell (1);
all negative pole piece (8) integrated connection has negative pole utmost point ear weld part (2), negative pole utmost point ear weld part (2) be connected with negative pole utmost point ear (3), negative pole utmost point ear weld part (2) are located battery case (1) surface and set up with anodal utmost point ear weld part (5) syntropy.
3. A lithium battery with high heat resistance according to claim 1, characterized in that: the positive pole piece (6) is provided with a positive pole current collector and a graphene layer (9) coated on the surface of the positive pole current collector, and the negative pole piece (8) is provided with a negative pole current collector and a lithium metal layer (12) coated on the surface of the negative pole current collector.
4. A lithium battery with high heat resistance according to claim 1, characterized in that: and the positive electrode lug (4) and the positive electrode lug welding part (5) and the negative electrode lug (3) and the negative electrode lug welding part (2) are fixed by laser welding.
5. A lithium battery with high heat resistance according to claim 1, characterized in that: the diaphragm (7) is a polypropylene high-molecular diaphragm.
6. A lithium battery with high heat resistance according to claim 2, characterized in that: the positive current collector is a double-sided light aluminum foil (10) which is coated on the surface of the positive pole piece (6), and the negative current collector is a double-sided light iron foil (11) which is coated on the surface of the negative pole piece (8).
7. A lithium battery with high heat resistance according to claim 1, characterized in that: the battery shell (1) is a nickel-plated aluminum shell.
8. A lithium battery with high heat resistance according to claim 1, characterized in that: the heat-resistant layer is made of ceramic fibers or glass fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503581.6A CN111900271A (en) | 2020-06-05 | 2020-06-05 | High-heat-resistance lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503581.6A CN111900271A (en) | 2020-06-05 | 2020-06-05 | High-heat-resistance lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111900271A true CN111900271A (en) | 2020-11-06 |
Family
ID=73207288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010503581.6A Pending CN111900271A (en) | 2020-06-05 | 2020-06-05 | High-heat-resistance lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111900271A (en) |
-
2020
- 2020-06-05 CN CN202010503581.6A patent/CN111900271A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201106 |