CN115377359A - Preparation method of battery cell pole piece, battery cell pole piece and battery cell - Google Patents
Preparation method of battery cell pole piece, battery cell pole piece and battery cell Download PDFInfo
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- CN115377359A CN115377359A CN202211085576.3A CN202211085576A CN115377359A CN 115377359 A CN115377359 A CN 115377359A CN 202211085576 A CN202211085576 A CN 202211085576A CN 115377359 A CN115377359 A CN 115377359A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 55
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 43
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- 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)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the technical field of batteries, and particularly discloses a preparation method of a battery cell pole piece, the battery cell pole piece and a battery cell. The preparation method of the battery cell pole piece comprises the following steps: the current collector is sequentially divided into a first polar ear area, a first heat-resistant area, a main performance area, a second heat-resistant area and a second polar ear area; coating first slurry on the surfaces of the first heat-resistant area and the second heat-resistant area to form a heat-resistant coating, coating second slurry on the surface of the main performance area to form a main performance coating, wherein the high-temperature resistance of the first slurry is greater than that of the second slurry; and rolling the current collector, and cutting along the axis of the main performance area to obtain two battery cell pole pieces. The battery core pole piece prepared by the method has longer service life.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a preparation method of a pole piece of a battery cell, the pole piece of the battery cell and the battery cell.
Background
Currently, lithium ion batteries are classified into circular batteries, square batteries and polymer batteries, and tabs in a pole group structure are basically on current collectors on two sides of a pole piece.
At present, when the battery core pole pieces with the lug structures on two sides are prepared, one coating layer is generally coated on the battery core pole pieces, the coating layer is not subjected to heat effect design, and when the temperature of the lug is too high, the electric performance attenuation of the battery core pole pieces is too fast from the region close to a high-temperature region, so that the battery core pole pieces are caused to lose efficacy.
Therefore, a method for manufacturing a cell pole piece, a cell pole piece and a lithium ion battery are continuously provided to solve the above problems.
Disclosure of Invention
According to one aspect of the invention, the invention provides a preparation method of a battery cell pole piece, and the battery cell pole piece prepared by the method has longer service life.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the battery cell pole piece is suitable for the battery cell pole piece with the pole ear structures on two sides, and comprises the following steps:
the current collector is sequentially divided into a first polar ear area, a first heat-resistant area, a main performance area, a second heat-resistant area and a second polar ear area;
coating first slurry on the surfaces of the first heat-resistant area and the second heat-resistant area to form a heat-resistant coating, and coating second slurry on the surface of the main performance area to form a main performance coating, wherein the high-temperature resistance of the first slurry is greater than that of the second slurry;
rolling the current collector;
and cutting along the axis of the main performance area to obtain two battery cell pole pieces.
Optionally, the first heat resistant zone has a width of 5mm to 30mm, and the second heat resistant zone has a width of 5mm to 30mm.
Optionally, the first slurry and the second slurry are applied simultaneously, and the heat-resistant coating is disposed adjacent to the primary performance coating.
Optionally, the heat-resistant coating has a thickness of 50 μm to 200 μm.
Optionally, the primary performance coating has a thickness of 50 μm to 200 μm.
Optionally, the method further comprises the following steps:
welding a first tab to the first tab region and a second tab to the second tab region.
Optionally, the method further comprises the following steps:
and drying, namely drying the current collectors coated with the first slurry and the second slurry.
Optionally, the solids content of the first slurry is equal to the solids content of the second slurry.
According to another aspect of the invention, the invention provides a battery cell pole piece, which is prepared by adopting the preparation method of the battery cell pole piece.
According to another aspect of the invention, the invention provides a battery cell, which comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate and/or the negative plate is the battery cell pole piece.
The beneficial effects of the invention are as follows:
the invention provides a preparation method of a battery cell pole piece, which comprises the following steps: the current collector is sequentially divided into a first polar ear area, a first heat-resistant area, a main performance area, a second heat-resistant area and a second polar ear area; coating first slurry on the surfaces of the first heat-resistant area and the second heat-resistant area to form a heat-resistant coating, coating second slurry on the surface of the main performance area to form a main performance coating, wherein the high-temperature resistance of the first slurry is greater than that of the second slurry; and rolling the current collector to obtain the battery cell pole piece. The first slurry with higher high-temperature resistance is coated on the surface of the first heat-resistant area close to the first polar ear area to form a heat-resistant coating, the first slurry with higher high-temperature resistance is also coated on the surface of the second heat-resistant area close to the second polar ear area to form a heat-resistant coating, and when the polar ears of the first polar ear area and the second polar ear area generate heat, the performance attenuation of the heat-resistant coating cannot be accelerated due to high-temperature heat conduction, so that the service life of the battery cell prepared by the battery cell preparation method is prolonged.
Because the price of the first slurry with higher high-temperature resistance is higher, the surface of the main performance area is coated with the second slurry with low high-temperature resistance. The production cost of the battery cell pole piece can be reduced while the service performance of the battery cell pole piece is ensured.
Drawings
Fig. 1 is a flow chart illustrating steps of a method for manufacturing a cell pole piece according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell pole piece according to an embodiment of the present invention.
In the figure:
100. a first extreme ear region; 200. a first heat resistant zone; 300. a primary performance zone; 400. a second heat resistant zone; 500. a second polar ear region.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The invention provides a preparation method of a battery cell pole piece, and the battery cell pole piece prepared by the method has longer service life.
Specifically, as shown in fig. 1, the method for manufacturing a battery cell pole piece is suitable for a battery cell pole piece with a tab structure on two sides, and the method for manufacturing a battery cell pole piece includes the following steps:
s1, sequentially dividing the current collector into a first extreme ear region 100, a first heat-resistant region 200, a main performance region 300, a second heat-resistant region 400, and a second extreme ear region 500.
Specifically, as shown in fig. 2, the first tab region 100, the first heat-resistant region 200, the main performance region 300, the second heat-resistant region 400, and the second tab region 500 are sequentially disposed along the width direction of the current collector, and the first tab region 100, the first heat-resistant region 200, the main performance region 300, the second heat-resistant region 400, and the second tab region 500 all extend along the length direction of the current collector.
S2, coating first slurry on the surfaces of the first heat-resisting area 200 and the second heat-resisting area 400 to form a heat-resisting coating, coating second slurry on the surface of the main performance area 300 to form a main performance coating, wherein the high-temperature resistance of the first slurry is greater than that of the second slurry;
the surface of the first heat-resistant area 200 close to the first polar ear area 100 and the surface of the second heat-resistant area 400 close to the second polar ear area 500 are coated with the first slurry with high-temperature resistance, so that the high-temperature resistance of the battery cell pole piece is improved, the performance of the heat-resistant coating cannot be influenced even if the temperatures of the first polar ear area 100 and the second polar ear area 500 are too high, and the service life of the battery cell pole piece is prolonged. The main performance zone 300 is arranged between the first heat-resisting zone 200 and the second heat-resisting zone 400, and the surface of the main performance zone 300 is coated with the second slurry, so that on one hand, the surfaces of the first heat-resisting zone 200, the second heat-resisting zone 400 and the main performance zone 300 can be coated with the slurries, and the current collectors of the first heat-resisting zone 200, the main performance zone 300 and the second heat-resisting zone 400 can have similar ductility during rolling, so that the cell pole piece is prevented from being wavy and wrinkled; on the other hand, for the main performance region 300, the temperature is generally not very high, so the requirement on the high temperature resistance of the second slurry is not high, and compared with the first slurry, the price is lower due to the lower high temperature resistance of the second slurry, and the production cost of the battery cell pole piece is reduced.
Further, in one embodiment, the first slurry and the second slurry are applied simultaneously, and the heat-resistant coating is disposed adjacent to the primary performance coating. The first slurry and the second slurry are coated simultaneously, so that the heat-resistant coating and the main performance coating are arranged adjacently, on one hand, the coating time can be saved, and the production efficiency of the battery cell pole piece can be improved; on the other hand, it is possible to ensure that the stress and ductility of the current collectors of the first heat resistant zone 200, the main performance zone 300, and the second heat resistant zone 400 are the same during rolling, and to prevent the occurrence of waving and wrinkling during rolling.
The width of the first heat-resistant zone 200 is preferably 5mm to 30mm, and may be, for example, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc., as required. Similarly, the width of the second heat-resistant zone 400 is 5mm to 30mm, and may be, for example, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or the like, which may be set according to actual needs. By setting the width of the first heat-resistant zone 200 to be 5mm-30mm and the width of the second heat-resistant zone 400 to be 5mm-30mm, the usage amount of the first slurry is reduced while the battery core pole piece is not damaged by heating, and further the production cost is reduced.
As a preferred technical scheme, the solid content of the first slurry is equal to that of the second slurry. The solid contents of the first slurry and the second slurry are the same, and the coating amount and the compaction density of the first slurry are the same when the first slurry is coated and rolled. The stress and ductility of the current collectors of the first heat-resistant area 200, the main performance area 300 and the second heat-resistant area 400 during rolling can be ensured to be the same, so that the phenomenon of wave or wrinkle during rolling is avoided, and the quality of the battery cell pole piece is improved.
Alternatively, the thickness of the heat-resistant coating layer is 50 μm to 200 μm, and may be, for example, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, or the like, as needed. Too thin or too thick a thickness of the heat-resistant coating layer may affect the subsequent rolling process. The thickness of the main performance coating is 50 μm-200 μm, and exemplarily, the thickness can be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm, etc., and the thickness can be set according to actual needs, and the thickness of the main performance coating is too thin or too thick, which affects the subsequent rolling process. Preferably, the thickness of the main performance coating is equal to that of the heat-resistant coating, so that the stress and ductility of the current collectors of the first heat-resistant zone 200, the main performance zone 300 and the second heat-resistant zone 400 can be ensured to be the same during rolling, the phenomenon of wave or wrinkle during rolling is avoided, and the quality of the battery cell pole piece is improved.
S21, drying the current collectors coated with the first slurry and the second slurry;
and drying the current collector and then rolling.
S3, rolling the current collector;
s31, after obtaining the battery cell pole piece, welding a first pole lug in a first pole lug area 100, welding a second pole lug in a second pole lug area 500, and when the first pole lug is a positive pole lug, the second pole lug is the positive pole lug; when the first tab is a negative tab, the second tab is a negative tab.
Optionally, the current collector may be made of a copper material, or may also be made of an aluminum material, in this embodiment, the cell pole piece of the current collector made of the copper material is a negative pole piece, and the cell pole piece of the current collector made of the aluminum material is a positive pole piece.
And S4, cutting along the axis of the main performance area to obtain two battery cell pole pieces.
In this embodiment, the first polar ear region 100 and the second polar ear region 500 are symmetrically disposed along the axis of the main performance region 300, the first heat-resistant region 200 and the second heat-resistant region 400 are symmetrically disposed along the axis of the main performance region, and are cut along the axis a of the main performance region 300, so that two identical battery cell pole pieces can be obtained, one-time coating is realized, the purpose of manufacturing two battery cell pole pieces is achieved, and the processing efficiency of the battery cell pole pieces is improved.
The invention also provides a battery cell pole piece which is prepared by the preparation method of the battery cell pole piece.
The invention also provides a battery cell, which comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate and/or the negative plate are/is the battery cell pole pieces in the specification.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The preparation method of the battery cell pole piece is suitable for the battery cell pole piece with the pole ear structures on two sides, and is characterized by comprising the following steps:
sequentially dividing a current collector into a first polar ear region (100), a first heat-resistant region (200), a main performance region (300), a second heat-resistant region (400) and a second polar ear region (500);
coating a first slurry on the surfaces of the first heat-resisting area (200) and the second heat-resisting area (400) to form a heat-resisting coating, coating a second slurry on the surface of the main performance area (300) to form a main performance coating, wherein the high-temperature resistance of the first slurry is greater than that of the second slurry;
rolling the current collector;
and cutting along the axis of the main performance area (300) to obtain two battery cell pole pieces.
2. The method for preparing the battery core pole piece according to claim 1, wherein the width of the first heat-resistant region (200) is 5mm to 30mm, and the width of the second heat-resistant region (400) is 5mm to 30mm.
3. The method of claim 1, wherein the first slurry and the second slurry are applied simultaneously, and the heat-resistant coating is disposed adjacent to the primary performance coating.
4. The method for preparing the battery core pole piece according to claim 1, wherein the thickness of the heat-resistant coating is 50 μm to 200 μm.
5. The method of claim 1, wherein the primary performance coating has a thickness of 50 μ ι η to 200 μ ι η.
6. The preparation method of the battery cell pole piece according to any one of claims 1 to 5, further comprising the steps of:
a first tab is welded to the first tab region (100) and a second tab is welded to the second tab region (500).
7. The preparation method of the battery cell pole piece according to any one of claims 1 to 5, further comprising the steps of:
and drying, namely drying the current collectors coated with the first slurry and the second slurry.
8. The method for preparing the battery cell pole piece according to any one of claims 1 to 5, wherein the solid content of the first slurry is equal to the solid content of the second slurry.
9. The battery core pole piece is characterized by being prepared by the preparation method of the battery core pole piece according to any one of claims 1 to 8.
10. An electrical core, characterized by comprising a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein the positive plate and/or the negative plate is the electrical core plate of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211085576.3A CN115377359A (en) | 2022-09-06 | 2022-09-06 | Preparation method of battery cell pole piece, battery cell pole piece and battery cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211085576.3A CN115377359A (en) | 2022-09-06 | 2022-09-06 | Preparation method of battery cell pole piece, battery cell pole piece and battery cell |
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| CN115377359A true CN115377359A (en) | 2022-11-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016129105A (en) * | 2015-01-09 | 2016-07-14 | 古河電気工業株式会社 | Tab lead |
| JP2017059402A (en) * | 2015-09-16 | 2017-03-23 | 凸版印刷株式会社 | Tab sealant heat-resistant insulating structure for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery |
| CN107895770A (en) * | 2017-11-04 | 2018-04-10 | 山西长征动力科技有限公司 | A kind of coating design method for reducing battery short circuit rate |
| CN110148706A (en) * | 2019-05-17 | 2019-08-20 | 桑顿新能源科技有限公司 | Battery pole piece and preparation method thereof, battery core and battery |
| CN112563574A (en) * | 2020-11-30 | 2021-03-26 | 合肥国轩高科动力能源有限公司 | Packaging method for reducing poor insulation of soft package lithium battery |
| CN114256464A (en) * | 2021-12-14 | 2022-03-29 | 惠州市惠德瑞锂电科技股份有限公司 | Improved positive electrode slurry, preparation method and preparation method of positive electrode piece |
-
2022
- 2022-09-06 CN CN202211085576.3A patent/CN115377359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016129105A (en) * | 2015-01-09 | 2016-07-14 | 古河電気工業株式会社 | Tab lead |
| JP2017059402A (en) * | 2015-09-16 | 2017-03-23 | 凸版印刷株式会社 | Tab sealant heat-resistant insulating structure for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery |
| CN107895770A (en) * | 2017-11-04 | 2018-04-10 | 山西长征动力科技有限公司 | A kind of coating design method for reducing battery short circuit rate |
| CN110148706A (en) * | 2019-05-17 | 2019-08-20 | 桑顿新能源科技有限公司 | Battery pole piece and preparation method thereof, battery core and battery |
| CN112563574A (en) * | 2020-11-30 | 2021-03-26 | 合肥国轩高科动力能源有限公司 | Packaging method for reducing poor insulation of soft package lithium battery |
| CN114256464A (en) * | 2021-12-14 | 2022-03-29 | 惠州市惠德瑞锂电科技股份有限公司 | Improved positive electrode slurry, preparation method and preparation method of positive electrode piece |
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