CN112331873A - Manufacturing method for improving temperature rise of lithium battery - Google Patents
Manufacturing method for improving temperature rise of lithium battery Download PDFInfo
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- CN112331873A CN112331873A CN202011252623.XA CN202011252623A CN112331873A CN 112331873 A CN112331873 A CN 112331873A CN 202011252623 A CN202011252623 A CN 202011252623A CN 112331873 A CN112331873 A CN 112331873A
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- lithium battery
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- manufacturing
- temperature rise
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
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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
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
- H01M6/162—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
Abstract
The invention relates to the technical field of lithium battery manufacturing, and discloses a manufacturing method for improving the temperature rise of a lithium battery, which comprises the following steps: s1: respectively dissolving a positive electrode material and a negative electrode material in an organic solvent, uniformly stirring, respectively coating the positive electrode material and the negative electrode material on a positive current collector and a negative current collector, drying, and rolling to obtain a positive plate and a negative plate; s2: uniformly coating temperature rise resistant materials on the upper and lower surfaces of the positive plate and the negative plate, and sealing and storing for 5-10 hours by using a PE film; s3: and (3) removing the PE film, slicing the positive plate and the negative plate, and removing burrs at the sliced positions. The lithium battery prepared by the method can effectively improve the phenomenon that the temperature of the traditional lithium battery rises too fast, has the advantages of stable voltage, difficult decomposition of electrolyte and the like, effectively improves the safety performance and the service life of the lithium battery, is simpler in manufacturing process, is lower in input manufacturing cost, and has certain market prospect.
Description
Technical Field
The invention relates to the technical field of lithium battery manufacturing, in particular to a manufacturing method for improving the temperature rise of a lithium battery.
Background
The lithium battery is a primary battery using lithium metal or lithium alloy as a negative electrode material and using a non-aqueous electrolyte solution, unlike a lithium ion battery, which is a rechargeable battery, and a lithium ion polymer battery. The inventor of lithium batteries was edison. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. Therefore, lithium batteries have not been used for a long time. With the development of microelectronic technology at the end of the twentieth century, miniaturized devices are increasing, and high requirements are made on power supplies. The lithium battery has then entered a large-scale practical stage.
However, the lithium battery manufactured by the existing method generally has the phenomenon of too fast temperature rise, so that the service life of the lithium battery is influenced, the manufacturing process is complex, and the manufacturing cost is easily increased. Therefore, the manufacturing method for improving the temperature rise of the lithium battery is provided by the technical personnel in the field, so as to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide a manufacturing method for improving the temperature rise of a lithium battery, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a manufacturing method for improving the temperature rise of a lithium battery comprises the following steps:
s1: respectively dissolving a positive electrode material and a negative electrode material in an organic solvent, uniformly stirring, respectively coating the positive electrode material and the negative electrode material on a positive current collector and a negative current collector, drying, and rolling to obtain a positive plate and a negative plate;
s2: uniformly coating temperature rise resistant materials on the upper and lower surfaces of the positive plate and the negative plate, and sealing and storing for 5-10 hours by using a PE film;
s3: removing the PE film, slicing the positive plate and the negative plate, and removing burrs at the sliced positions;
s4: manufacturing a battery cell by adopting a winding structure according to the sequence of a positive plate, a diaphragm and a negative plate, respectively welding the positive plate and the negative plate in the battery cell with a lug to form a positive lead-out end and a negative lead-out end, then putting the battery cell into an aluminum-plastic packaging film, and respectively leading out the positive lug and the negative lug;
s5: after the electrolyte is injected into the battery cell through the electrolyte injection port, the electrolyte injection port is plugged, and a semi-finished lithium battery is obtained;
s6: and carrying out internal short circuit test and high-temperature service life test on the semi-finished lithium battery, and then carrying out sealed packaging and aging to obtain the finished lithium battery.
As a still further scheme of the invention: and in the S2, the drying temperature is 95-115 ℃, the drying time is 28-34 h, and the moisture content of the positive and negative pole pieces is controlled to be less than 180 ppm.
As a still further scheme of the invention: s3 when the section, should cut out 1 ~ 1.8 mm' S in pole piece edge earlier the substrate to retrieve the substrate of cutting out.
As a still further scheme of the invention: the preparation method of the electrolyte comprises the following steps: weighing 20-40 parts of ethylene glycol, 9-14 parts of mannitol, 5-8 parts of glacial acetic acid and 3-6 parts of acrylate according to parts by weight for later use, then sequentially pouring the ethylene glycol, the mannitol and the glacial acetic acid into a stirrer for stirring to obtain a mixed solution, heating the mixed solution to 138-148 ℃, then pouring the acrylate and continuously stirring to obtain the electrolyte.
As a still further scheme of the invention: the stirring speed in the stirrer is 80-120 r/min, and the stirring time is 15-25 min.
As a still further scheme of the invention: the organic solvent is any one of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether, triethanolamine, methyl acetate, ethyl acetate or propyl acetate.
As a still further scheme of the invention: the aging temperature in the S6 is 65-85 ℃, the aging pressure is 0.25-0.45 MPa, and the aging time is 35-45 h.
Compared with the prior art, the invention has the beneficial effects that: the lithium battery prepared by the method can effectively improve the phenomenon that the temperature of the traditional lithium battery rises too fast, has the advantages of stable voltage, difficult decomposition of electrolyte and the like, effectively improves the safety performance and the service life of the lithium battery, is simpler in manufacturing process, is lower in input manufacturing cost, and has certain market prospect.
Detailed Description
In embodiment 1 of the present invention, a manufacturing method for improving temperature rise of a lithium battery includes the following steps:
s1: respectively dissolving a positive electrode material and a negative electrode material in an organic solvent, uniformly stirring, respectively coating the positive electrode material and the negative electrode material on a positive current collector and a negative current collector, drying, and rolling to obtain a positive plate and a negative plate;
s2: uniformly coating temperature rise resistant materials on the upper and lower surfaces of the positive plate and the negative plate, and sealing and storing for 6 hours by using a PE film;
s3: removing the PE film, slicing the positive plate and the negative plate, and removing burrs at the sliced positions;
s4: manufacturing a battery cell by adopting a winding structure according to the sequence of a positive plate, a diaphragm and a negative plate, respectively welding the positive plate and the negative plate in the battery cell with a lug to form a positive lead-out end and a negative lead-out end, then putting the battery cell into an aluminum-plastic packaging film, and respectively leading out the positive lug and the negative lug;
s5: after the electrolyte is injected into the battery cell through the electrolyte injection port, the electrolyte injection port is plugged, and a semi-finished lithium battery is obtained;
s6: and carrying out internal short circuit test and high-temperature service life test on the semi-finished lithium battery, and then carrying out sealed packaging and aging to obtain the finished lithium battery.
Preferably: and in the S2, the drying temperature is 100 ℃, the drying time is 29h, and the moisture content of the positive and negative pole pieces is controlled to be less than 180 ppm.
Preferably: s3 when slicing, cutting the base material with 1.2mm of the edge of the pole piece, and recovering the cut base material.
Preferably: the preparation method of the electrolyte comprises the following steps: weighing 25 parts of ethylene glycol, 11 parts of mannitol, 6 parts of glacial acetic acid and 4 parts of acrylic ester according to parts by weight for later use, then sequentially pouring the ethylene glycol, the mannitol and the glacial acetic acid into a stirrer to be stirred to obtain a mixed solution, heating the mixed solution to 140 ℃, then pouring the acrylic ester into the mixed solution and continuously stirring the mixture to obtain the electrolyte.
Preferably: the stirring speed in the stirrer is 90r/min, and the stirring time is 18 min.
Preferably: the organic solvent is any one of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether, triethanolamine, methyl acetate, ethyl acetate or propyl acetate.
Preferably: the aging temperature in S6 is 68 ℃, the aging pressure is 0.3MPa, and the aging time is 38 h.
In embodiment 2 of the present invention, a manufacturing method for improving temperature rise of a lithium battery includes the following steps:
s1: respectively dissolving a positive electrode material and a negative electrode material in an organic solvent, uniformly stirring, respectively coating the positive electrode material and the negative electrode material on a positive current collector and a negative current collector, drying, and rolling to obtain a positive plate and a negative plate;
s2: uniformly coating temperature rise resistant materials on the upper and lower surfaces of the positive plate and the negative plate, and sealing and storing for 9 hours by using a PE film;
s3: removing the PE film, slicing the positive plate and the negative plate, and removing burrs at the sliced positions;
s4: manufacturing a battery cell by adopting a winding structure according to the sequence of a positive plate, a diaphragm and a negative plate, respectively welding the positive plate and the negative plate in the battery cell with a lug to form a positive lead-out end and a negative lead-out end, then putting the battery cell into an aluminum-plastic packaging film, and respectively leading out the positive lug and the negative lug;
s5: after the electrolyte is injected into the battery cell through the electrolyte injection port, the electrolyte injection port is plugged, and a semi-finished lithium battery is obtained;
s6: and carrying out internal short circuit test and high-temperature service life test on the semi-finished lithium battery, and then carrying out sealed packaging and aging to obtain the finished lithium battery.
Preferably: and in the S2, the drying temperature is 112 ℃, the drying time is 32 hours, and the moisture content of the positive and negative pole pieces is controlled to be less than 180 ppm.
Preferably: s3 when slicing, cutting the base material with 1.6mm of the edge of the pole piece, and recovering the cut base material.
Preferably: the preparation method of the electrolyte comprises the following steps: weighing 35 parts of ethylene glycol, 12 parts of mannitol, 7 parts of glacial acetic acid and 5 parts of acrylic ester according to parts by weight for later use, then sequentially pouring the ethylene glycol, the mannitol and the glacial acetic acid into a stirrer to be stirred to obtain a mixed solution, heating the mixed solution to 145 ℃, then pouring the acrylic ester into the mixed solution and continuously stirring the mixture to obtain the electrolyte.
Preferably: the stirring speed in the stirrer is 110r/min, and the stirring time is 22 min.
Preferably: the organic solvent is any one of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether, triethanolamine, methyl acetate, ethyl acetate or propyl acetate.
Preferably: the aging temperature in S6 is 80 ℃, the aging pressure is 0.42MPa, and the aging time is 42 h.
The lithium battery prepared by the method can effectively improve the phenomenon that the temperature of the traditional lithium battery rises too fast, has the advantages of stable voltage, difficult decomposition of electrolyte and the like, effectively improves the safety performance and the service life of the lithium battery, is simpler in manufacturing process, is lower in input manufacturing cost, and has certain market prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (7)
1. A manufacturing method for improving the temperature rise of a lithium battery is characterized by comprising the following steps:
s1: respectively dissolving a positive electrode material and a negative electrode material in an organic solvent, uniformly stirring, respectively coating the positive electrode material and the negative electrode material on a positive current collector and a negative current collector, drying, and rolling to obtain a positive plate and a negative plate;
s2: uniformly coating temperature rise resistant materials on the upper and lower surfaces of the positive plate and the negative plate, and sealing and storing for 5-10 hours by using a PE film;
s3: removing the PE film, slicing the positive plate and the negative plate, and removing burrs at the sliced positions;
s4: manufacturing a battery cell by adopting a winding structure according to the sequence of a positive plate, a diaphragm and a negative plate, respectively welding the positive plate and the negative plate in the battery cell with a lug to form a positive lead-out end and a negative lead-out end, then putting the battery cell into an aluminum-plastic packaging film, and respectively leading out the positive lug and the negative lug;
s5: after the electrolyte is injected into the battery cell through the electrolyte injection port, the electrolyte injection port is plugged, and a semi-finished lithium battery is obtained;
s6: and carrying out internal short circuit test and high-temperature service life test on the semi-finished lithium battery, and then carrying out sealed packaging and aging to obtain the finished lithium battery.
2. The manufacturing method for improving the temperature rise of the lithium battery as claimed in claim 1, wherein the drying temperature in the step S2 is 95-115 ℃, the drying time is 28-34 h, and the moisture content of the positive and negative electrode sheets is controlled to be less than 180 ppm.
3. The manufacturing method for improving the temperature rise of the lithium battery as claimed in claim 1, wherein in the step of slicing S3, a substrate with a thickness of 1-1.8 mm on the edge of the pole piece is cut off, and the cut substrate is recycled.
4. The manufacturing method for improving the temperature rise of the lithium battery as claimed in claim 1, wherein the preparation method of the electrolyte is as follows: weighing 20-40 parts of ethylene glycol, 9-14 parts of mannitol, 5-8 parts of glacial acetic acid and 3-6 parts of acrylate according to parts by weight for later use, then sequentially pouring the ethylene glycol, the mannitol and the glacial acetic acid into a stirrer for stirring to obtain a mixed solution, heating the mixed solution to 138-148 ℃, then pouring the acrylate and continuously stirring to obtain the electrolyte.
5. The manufacturing method for improving the temperature rise of the lithium battery as claimed in claim 4, wherein the stirring speed in the stirrer is 80-120 r/min, and the stirring time is 15-25 min.
6. The method as claimed in claim 1, wherein the organic solvent is any one of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether, triethanolamine, methyl acetate, ethyl acetate, and propyl acetate.
7. The manufacturing method for improving the temperature rise of the lithium battery as claimed in claim 1, wherein the aging temperature in the S6 is 65-85 ℃, the aging pressure is 0.25-0.45 MPa, and the aging time is 35-45 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011252623.XA CN112331873A (en) | 2020-11-11 | 2020-11-11 | Manufacturing method for improving temperature rise of lithium battery |
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| CN202011252623.XA CN112331873A (en) | 2020-11-11 | 2020-11-11 | Manufacturing method for improving temperature rise of lithium battery |
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| CN102856521A (en) * | 2012-09-19 | 2013-01-02 | 蚌埠鑫源石英材料有限公司 | Plate-like alpha-alumina coating for lithium battery |
| CN104157811A (en) * | 2013-12-11 | 2014-11-19 | 中航锂电（洛阳）有限公司 | Lithium ion battery composite diaphragm and preparation method and application thereof |
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| CN110400904A (en) * | 2019-06-04 | 2019-11-01 | 江西力能新能源科技有限公司 | A kind of composite ceramic coat lithium battery positive-negative plate and lithium battery |
| CN110492059A (en) * | 2019-08-28 | 2019-11-22 | 湖北锂诺新能源科技有限公司 | Preparation method of lithium ion battery equipped with high heat dissipation pole piece |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102856521A (en) * | 2012-09-19 | 2013-01-02 | 蚌埠鑫源石英材料有限公司 | Plate-like alpha-alumina coating for lithium battery |
| CN104157811A (en) * | 2013-12-11 | 2014-11-19 | 中航锂电（洛阳）有限公司 | Lithium ion battery composite diaphragm and preparation method and application thereof |
| US20170309915A1 (en) * | 2014-12-08 | 2017-10-26 | Lg Chem, Ltd. | Electrode assembly having improved safety, manufacturing method therefor and electrochemical element comprising electrode assembly |
| CN105529433A (en) * | 2016-02-26 | 2016-04-27 | 宁德时代新能源科技股份有限公司 | Electrode with coating and lithium ion battery comprising same |
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| CN110400904A (en) * | 2019-06-04 | 2019-11-01 | 江西力能新能源科技有限公司 | A kind of composite ceramic coat lithium battery positive-negative plate and lithium battery |
| CN110265732A (en) * | 2019-06-26 | 2019-09-20 | 广东旭派锂能能源有限公司 | A kind of constant temperature regulation lithium battery manufacture craft and lithium battery |
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