CN110739491A - method for manufacturing soft-package lithium battery by using gluing diaphragm - Google Patents
method for manufacturing soft-package lithium battery by using gluing diaphragm Download PDFInfo
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- CN110739491A CN110739491A CN201910968008.XA CN201910968008A CN110739491A CN 110739491 A CN110739491 A CN 110739491A CN 201910968008 A CN201910968008 A CN 201910968008A CN 110739491 A CN110739491 A CN 110739491A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- 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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- 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
Abstract
The invention relates to a method for manufacturing soft package lithium batteries by using a glued membrane, and a method for manufacturing soft package lithium batteries by using the glued membrane, which comprises the steps of S1, pole piece and membrane manufacturing, S2, battery cell assembling, S3, liquid injection and times of high-temperature aging, S4, formation, and S5, secondary high-temperature aging and secondary sealing.
Description
Technical Field
The invention relates to the field of battery manufacturing, in particular to a manufacturing method for manufacturing a soft package lithium battery by using glue-coated diaphragms.
Background
Soft-package lithium ion batteries have been used in the fields of 3C digital, new energy vehicles, energy storage, military industry, aerospace, etc. because of their advantages of flexible size change, high energy ratio, light weight, etc.
The patent with the application number of CN201610943353 provides soft package lithium ion battery manufacturing methods using composite gel membranes, wherein a polypropylene membrane with a surface coated with a copolymer of PVDF (polyvinylidene fluoride) and HFP (hexafluoropropylene) is used as a membrane, and the polypropylene membrane is creatively subjected to hot-pressing fusion to fuse the PVDF coated on the membrane and a pole piece into , so that adverse phenomena such as pole piece displacement and the like of the battery core in the operation process are avoided, and other process steps and process parameters are optimized, so that the finally manufactured battery has higher hardness and energy density, and the cycle performance and the safety performance are also improved.
However, the pole pieces and the gluing diaphragm are bonded too tightly by the additional hot-cold pressing process before liquid injection, so that the infiltration effect of the positive pole piece, the negative pole piece and the gluing diaphragm is poor, and definite influences are exerted on the cycle performance and safety of the battery.
Therefore, the defects in the field exist, the inventor needs to research, develop and innovate the problem urgently, technical schemes which can ensure good bonding effects of the positive and negative plates and the gluing diaphragm and enable the positive and negative plates and the diaphragm inside the battery cell to be fully soaked and activated are needed to be invented, and the cycle performance and the safety performance of the finally manufactured battery are further improved by steps.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide methods for manufacturing soft-package lithium batteries by using a gluing diaphragm, which can ensure good bonding effect of positive and negative plates and the gluing diaphragm, and fully infiltrate and activate the positive and negative plates and the diaphragm in a battery cell, so that the cycle performance and the safety performance of the finally manufactured batteries are further improved by steps.
In order to achieve the purpose, the invention adopts the following technical scheme:
A method for manufacturing soft-package lithium battery by using a gluing diaphragm, comprising the following steps:
s1, manufacturing a pole piece and a diaphragm: manufacturing a positive plate and a negative plate, selecting a polyethylene PE ceramic diaphragm coated with PVDF and HFP copolymer on the surface, putting the polyethylene PE ceramic diaphragm into a vacuum oven with the temperature of 70-90 ℃ and the vacuum degree of less than or equal to 100Pa, baking for 2.5-3.5h, and taking out the diaphragm after the temperature is reduced to the normal temperature;
s2, assembling the battery cell, namely manufacturing the positive plate, the diaphragm and the negative plate into a laminated core through Z-shaped lamination, welding tabs and sealing to obtain a semi-finished battery cell, putting the semi-finished battery cell into a vacuum oven, baking for 24-30 hours at the temperature of 80-100 ℃ and the vacuum degree of 80-100Pa, and taking out the battery cell after the temperature is reduced to the normal temperature;
s3, injecting liquid and times of high-temperature aging, namely injecting liquid into the battery cell under the condition that the humidity RH is less than or equal to 10 percent to form a battery, putting the battery into an aging room, and aging for 24-30h at the temperature of 40-50 ℃;
s4, forming, namely, putting the batteries aged for times into a jig forming cabinet, and performing staged forming operation;
s5, secondary high-temperature aging and secondary sealing: and (3) placing the formed battery into an aging room, aging for 24-30h at 40-50 ℃ for the second time at high temperature, and then performing secondary sealing and shaping to obtain a soft package lithium ion battery product.
Preferably, in the manufacturing method for manufacturing the soft-package lithium battery by using the gluing diaphragm, the seals are an aluminum-plastic film top seal and a side seal.
Preferably, in the manufacturing method for manufacturing the soft package lithium battery by using the gluing diaphragm, the second sealing is trimming and packaging molding of the aluminum plastic film.
Preferably, the formation time of the method for manufacturing the soft package lithium battery by using the gluing diaphragm is 1-3 h.
Preferably, the grading formation comprises times of formation and secondary formation;
the formation conditions of the times of formation comprise:
the temperature is 70-90 deg.C, the pressure is 0.8-2.0MPa, and the time is 10-30 min;
the formation conditions of the secondary formation comprise:
the temperature is 50-70 ℃, the pressure is 0.8-2.0MPa, and the time is the residual formation time.
Preferably, in the method for manufacturing a soft-package lithium battery by using a glued membrane, in step S5, the shaping conditions are as follows: the temperature is 80-100 ℃, the pressure is 1.2-2.0MPa, and the time is 30-60S.
Preferably, in the method for manufacturing a lithium battery pack with a glued membrane, the step S1 includes:
and (3) preparing the positive plate, namely mixing the positive active material, the positive binder, the positive conductive agent and the positive solvent according to the preset proportion of to prepare positive slurry, and preparing the positive plate by coating, drying, rolling and die cutting.
Preferably, in the method for manufacturing the soft-package lithium battery by using the gluing diaphragm, the positive binder is PVDF.
Preferably, in the method for manufacturing a lithium battery pack with a glued membrane, the step S1 includes:
manufacturing a negative plate: and mixing the negative electrode active material, the negative electrode binder, the negative electrode conductive agent and the negative electrode solvent according to a second predetermined proportion to prepare negative electrode slurry, and preparing the negative electrode sheet by coating, drying, rolling and die cutting.
Preferably, in the method for manufacturing the soft-package lithium battery by using the gluing diaphragm, the negative binder is styrene butadiene rubber.
Compared with the prior art, the manufacturing methods for manufacturing the soft package lithium battery by using the gluing diaphragm, provided by the invention, have the advantages that the liquid is injected firstly in the production process, and then the battery is shaped and manufactured after times of/secondary high-temperature aging and secondary sealing operation, so that the good bonding effect of the positive and negative plates and the gluing diaphragm is ensured, and the positive and negative plates and the diaphragm in the battery cell are fully infiltrated and activated.
Drawings
Fig. 1 is a flow chart of a manufacturing method for manufacturing a soft-package lithium battery by using a gluing diaphragm.
PE (polyethylene)
PVDF (Poly vinyli den fluoride, polyvinylidene fluoride)
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention will be described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are only for explaining the present invention and are not intended to limit the present invention.
Example 1
Referring to fig. 1, the present invention provides methods for manufacturing soft-packaged lithium batteries by using a glue-coated separator, comprising the steps of:
s1, manufacturing a pole piece and a diaphragm, namely manufacturing a positive pole piece and a negative pole piece, selecting a polyethylene PE ceramic diaphragm coated with PVDF and HFP copolymer on the surface, putting the polyethylene PE ceramic diaphragm into a vacuum oven with the temperature of 70-90 ℃ and the vacuum degree of less than or equal to 100Pa, baking for 2.5-3.5h, and taking out the diaphragm after the temperature is reduced to the normal temperature, wherein the normal temperature is 20-30 ℃, and the preferable temperature is 25 ℃ under the condition of ;
s2, assembling the battery cell, namely, manufacturing the positive plate, the diaphragm and the negative plate into a stacked core through Z-shaped lamination, welding tabs and sealing to obtain a semi-finished battery cell, putting the semi-finished battery cell into a vacuum oven, baking for 24-30 hours at the temperature of 80-100 ℃ and the vacuum degree of 80-100Pa, cooling to normal temperature, and taking out the battery cell, wherein the normal temperature is 20-30 ℃ and is preferably 25 ℃ under the condition of , the Z-shaped lamination is specific surface mount modes of a soft package lithium ion battery, so that the production efficiency can be improved, the monomer capacity of the battery cell is larger, and larger current discharge can be carried out, and sealing, namely times of packaging is aluminum plastic film top sealing and side sealing;
s3, injecting liquid and times of high-temperature aging, namely injecting liquid into the battery cell under the condition that the humidity RH is less than or equal to 10 percent to form a battery, putting the battery into an aging room, and aging for 24-30h at the temperature of 40-50 ℃;
s4, forming, namely, putting the batteries aged for times into a jig forming cabinet, and performing staged forming operation;
s5, secondary high-temperature aging and secondary sealing: and (3) placing the formed battery into an aging room, aging for 24-30h at 40-50 ℃ for the second time at high temperature, and then performing secondary sealing and shaping to obtain a soft package lithium ion battery product. The secondary packaging is edge cutting and packaging molding of the aluminum plastic film; the shaping conditions are that the temperature is 80-100 ℃, the pressure is 1.2-2.0MPa, and the time is 30-60S.
The method comprises the steps of preparing a positive plate, mixing a positive active material, a positive binder, a positive conductive agent and a positive solvent according to a preset ratio of to prepare positive slurry, coating, drying, rolling and die cutting to obtain the positive plate, wherein the positive active material is a ternary active material, the positive binder is polyvinylidene fluoride, the positive conductive agent comprises carbon black and graphite, the positive solvent is N-methyl pyrrolidone, the positive slurry is uniformly coated on two sides of a positive conductive foil, the positive conductive foil is dried by a drying oven and then rolled and then cut, the positive plate is cut into positive plates with a set size by a cutting die, the positive conductive foil is preferably an aluminum foil, the preset ratio of is a conventional ratio in the field and is not limited, preparing a negative plate, mixing the negative active material, the negative binder, the negative conductive agent and the negative solvent according to a second preset ratio to prepare a negative slurry, coating, drying, rolling and die cutting to obtain the negative plate, the negative active material is a graphite active material, the negative binder is styrene butadiene rubber, the negative conductive agent is a negative conductive agent is preferably a carboxymethyl cellulose, the negative conductive agent is uniformly coated on a second preset ratio, the negative foil, the negative conductive foil is rolled and the negative foil is not limited, the negative conductive foil, the negative conductive agent is dried by a second preset ratio of a second preset ratio, the negative foil, the negative conductive foil, the negative foil is preferably sodium cellulose sodium carboxymethyl cellulose, the negative.
According to the method provided by the invention, before times of high-temperature aging, the assembled battery core is injected, the good wetting effect of the battery core can be kept as a result of formation after times of high-temperature aging, and then the battery can be manufactured after formation, secondary high-temperature aging, secondary sealing and shaping, and the good wetting effect of the battery core can still be kept.
Preferably, in this embodiment, in step S4, the formation time is 1 to 3 hours.
The phasing formation comprises times of formation and twice of formation;
the formation conditions of the times of formation comprise:
the temperature is 70-90 deg.C, the pressure is 0.8-2.0MPa, and the time is 10-30 min;
the formation conditions of the secondary formation comprise:
the temperature is 50-70 ℃, the pressure is 0.8-2.0MPa, and the time is the residual formation time.
Specifically, the temperature is formed by stages, at the th stage, the temperature is higher, PVDF and HFP copolymer in the diaphragm can be melted, the pole piece and the diaphragm are better bonded, and at the second stage, the temperature is reduced, so that the phenomenon that the molten colloid blocks the diaphragm hole due to overlong high temperature is avoided, and under the condition of , the total formation time is 1-3h, and the charging electric energy is 0.1-1C.
Example 2 comparison of wetting effects
The positive electrode ternary active substance with the mass ratio of 97%, the binder polyvinylidene fluoride with the mass ratio of 1.5%, the conductive carbon black with the mass ratio of 1.0% and the conductive graphite with the mass ratio of 0.5% are uniformly mixed to prepare positive electrode slurry, and the positive electrode sheet is prepared through coating, drying, slitting and die cutting. Uniformly mixing 95.5 mass percent of negative electrode graphite active substance, 2.0 mass percent of binder styrene butadiene rubber, 1.3 mass percent of conductive carbon black and 1.2 mass percent of sodium carboxymethylcellulose to prepare negative electrode slurry, and preparing a negative electrode sheet through coating, drying, slitting and die cutting. Selecting a glue-coated ceramic diaphragm, wherein the diaphragm is a polyethylene ceramic diaphragm coated with PVDF and HFP copolymer on the surface, putting the diaphragm into a vacuum oven with the constant temperature of 80 ℃, the vacuum degree is less than or equal to 100Pa, baking for 3.0h, stopping heating, and taking out the diaphragm after the temperature is reduced to the normal temperature. The specification of the diaphragm is PE wet-process base film with the thickness of 16 mu m, ceramic with the thickness of 2 mu m coated on both sides, and PVDF-HFP adhesive layers with the thickness of 1 mu m coated on both sides.
Comparative Battery preparation
A battery was prepared from the above materials using conventional methods, with the following steps:
manufacturing an electric core: overlapping the positive pole piece, the diaphragm and the negative pole piece and then winding the overlapped positive pole piece, the diaphragm and the negative pole piece into a battery cell;
hot-pressing fusion: placing the battery cell in a hot press for hot-pressing fusion;
cooling and shaping: placing the battery core in a cold press for cold pressing, cooling and shaping;
manufacturing a battery: welding a lug of the battery cell and packaging the battery cell by an aluminum plastic film to obtain a battery;
baking the battery: placing the battery into a vacuum oven, setting the temperature to be 90 ℃, starting baking after the vacuumizing value reaches-0.10 MPa, stopping heating after baking for 36h, taking out the battery core after the temperature is reduced to be below 35 ℃, and injecting liquid into the battery;
aging: and (4) putting the battery after liquid injection into an aging room, and aging for 36 hours at the temperature of 50 ℃.
And stacking the positive plate, the negative plate and the diaphragm into a battery core, performing cold and hot pressing, injecting liquid, and aging to prepare the battery with the capacity of 18 Ah.
Preparation of Experimental group Battery
The method provided by the invention is used for preparing a battery from the same material as the comparative group, and the steps are as follows:
and manufacturing the positive plate, the gluing ceramic diaphragm and the negative plate into a laminated core through Z-shaped lamination, and then welding a tab, and carrying out top sealing and side sealing on an aluminum-plastic film to obtain a semi-finished product battery cell.
And (3) putting the battery cell into a vacuum oven, setting the temperature to be 90 ℃, setting the vacuum degree to be less than or equal to 100Pa, baking for 24 hours, stopping heating, and taking out the battery cell after the temperature is reduced to the normal temperature.
And injecting liquid into the battery cell under the condition that the relative humidity RH is less than or equal to 10%, putting the battery after liquid injection into an aging room, and aging for 24h at the temperature of 45 ℃.
And placing the aged battery core into a clamp formation cabinet, and performing staged formation charging.
And (3) placing the formed battery core into an aging room, and aging for 24 hours at the temperature of 45 ℃.
And trimming the aged cell by using an aluminum-plastic film, shaping the cell for 30-60s at the temperature of 90 ℃ and under the pressure of 2.0MPa after trimming and packaging the cell, and then grading and grading to obtain the soft package lithium ion cell product.
And stacking the positive plate, the diaphragm and the negative plate in a Z shape, performing tab welding, top sealing and side sealing of an aluminum-plastic film, baking, injecting liquid, performing staged formation in the formation process, performing secondary high-temperature aging and secondary sealing, and preparing the battery with the capacity of 18 Ah.
The results obtained are shown in the following table:
| liquid retention capacity of single finished product battery core | Liquid retention coefficient of battery cell | Liquid retention capacity of single finished product battery core diaphragm | Liquid retention coefficient of diaphragm | |
| Comparison group | 54.5g | 3.03g/Ah | 7.58g | 9.475g/m2 |
| Experimental group | 57.8g | 3.21g/Ah | 8.84g | 11.05g/m2 |
The infiltration effect of the positive/negative pole pieces and the diaphragm in the battery directly influences the liquid retaining capacity of the battery cell and the liquid retaining capacity of the diaphragm in the battery, and further influences the electric energy storage capacity of the battery.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1, method for manufacturing soft package lithium battery by using gluing diaphragm, which is characterized by comprising the following steps:
s1, manufacturing a pole piece and a diaphragm: manufacturing a positive plate and a negative plate, selecting a polyethylene PE ceramic diaphragm coated with PVDF and HFP copolymer on the surface, putting the polyethylene PE ceramic diaphragm into a vacuum oven with the temperature of 70-90 ℃ and the vacuum degree of less than or equal to 100Pa, baking for 2.5-3.5h, and taking out the diaphragm after the temperature is reduced to the normal temperature;
s2, assembling the battery cell, namely manufacturing the positive plate, the diaphragm and the negative plate into a laminated core through Z-shaped lamination, welding tabs and sealing to obtain a semi-finished battery cell, putting the semi-finished battery cell into a vacuum oven, baking for 24-30 hours at the temperature of 80-100 ℃ and the vacuum degree of 80-100Pa, and taking out the battery cell after the temperature is reduced to the normal temperature;
s3, injecting liquid and times of high-temperature aging, namely injecting liquid into the battery cell under the condition that the humidity RH is less than or equal to 10 percent to form a battery, putting the battery into an aging room, and aging for 24-30h at the temperature of 40-50 ℃;
s4, forming, namely, putting the batteries aged for times into a jig forming cabinet, and performing staged forming operation;
s5, secondary high-temperature aging and secondary sealing: and (3) placing the formed battery into an aging room, aging for 24-30h at 40-50 ℃ for the second time at high temperature, and then performing secondary sealing and shaping to obtain a soft package lithium ion battery product.
2. The method for manufacturing the lithium battery pack with the gummed diaphragm as claimed in claim 1, wherein the seals are aluminum plastic film top seal and side seal.
3. The method for manufacturing the lithium battery pack with the glued membrane as claimed in claim 1, wherein the secondary sealing is edge cutting and packaging molding of an aluminum plastic film.
4. The method for manufacturing a lithium battery pack with a rubberized separator according to claim 1, wherein said formation time is comprised between 1 and 3 hours.
5. The method for manufacturing a lithium battery pack with a rubberized membrane according to claim 4, wherein said phasing formation comprises times of formation and secondary formation;
the formation conditions of the times of formation comprise:
the temperature is 70-90 deg.C, the pressure is 0.8-2.0MPa, and the time is 10-30 min;
the formation conditions of the secondary formation comprise:
the temperature is 50-70 ℃, the pressure is 0.8-2.0MPa, and the time is the residual formation time.
6. The method for manufacturing a lithium battery pack with a glued membrane according to claim 1, wherein in step S5, the shaping conditions are as follows: the temperature is 80-100 ℃, the pressure is 1.2-2.0MPa, and the time is 30-60S.
7. The method for manufacturing a lithium battery pack with a glued membrane according to claim 1, characterized in that said step S1 comprises:
and (3) preparing the positive plate, namely mixing the positive active material, the positive binder, the positive conductive agent and the positive solvent according to the preset proportion of to prepare positive slurry, and preparing the positive plate by coating, drying, rolling and die cutting.
8. The method for manufacturing a lithium battery pack with a rubberized separator according to claim 7, wherein said positive binder is PVDF.
9. The method for manufacturing a lithium battery pack with a glued membrane according to claim 1, characterized in that said step S1 comprises:
manufacturing a negative plate: and mixing the negative electrode active material, the negative electrode binder, the negative electrode conductive agent and the negative electrode solvent according to a second predetermined proportion to prepare negative electrode slurry, and preparing the negative electrode sheet by coating, drying, rolling and die cutting.
10. The method for manufacturing the lithium battery pack with the glued membrane according to claim 9, wherein the negative binder is styrene-butadiene rubber.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477771A (en) * | 2020-02-28 | 2020-07-31 | 合肥国轩高科动力能源有限公司 | High-energy-density square laminated lithium ion battery and preparation method thereof |
| CN111613839A (en) * | 2020-06-05 | 2020-09-01 | 惠州市太能锂电有限公司 | Novel ultrathin battery and preparation process thereof |
| CN112103566A (en) * | 2020-10-20 | 2020-12-18 | 天津市捷威动力工业有限公司 | Method for manufacturing lithium ion battery by using gel diaphragm |
| CN112259802A (en) * | 2020-03-31 | 2021-01-22 | 蜂巢能源科技有限公司 | Lithium ion battery lamination method and device |
| CN112331931A (en) * | 2020-11-11 | 2021-02-05 | 河北零点新能源科技有限公司 | Lithium battery pack rapid assembly process |
| CN112421179A (en) * | 2020-10-29 | 2021-02-26 | 安徽理士新能源发展有限公司 | Manufacturing method of soft package battery based on composite gel diaphragm |
| CN113608139A (en) * | 2021-08-03 | 2021-11-05 | 傲普(上海)新能源有限公司 | Temperature monitoring method and manufacturing method of lithium ion battery |
| WO2021244410A1 (en) * | 2020-06-02 | 2021-12-09 | 孚能科技(镇江)有限公司 | Soft-pack lithium ion battery cell and preparation method therefor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477771A (en) * | 2020-02-28 | 2020-07-31 | 合肥国轩高科动力能源有限公司 | High-energy-density square laminated lithium ion battery and preparation method thereof |
| CN112259802A (en) * | 2020-03-31 | 2021-01-22 | 蜂巢能源科技有限公司 | Lithium ion battery lamination method and device |
| WO2021244410A1 (en) * | 2020-06-02 | 2021-12-09 | 孚能科技(镇江)有限公司 | Soft-pack lithium ion battery cell and preparation method therefor |
| CN111613839A (en) * | 2020-06-05 | 2020-09-01 | 惠州市太能锂电有限公司 | Novel ultrathin battery and preparation process thereof |
| CN112103566A (en) * | 2020-10-20 | 2020-12-18 | 天津市捷威动力工业有限公司 | Method for manufacturing lithium ion battery by using gel diaphragm |
| CN112421179A (en) * | 2020-10-29 | 2021-02-26 | 安徽理士新能源发展有限公司 | Manufacturing method of soft package battery based on composite gel diaphragm |
| CN112331931A (en) * | 2020-11-11 | 2021-02-05 | 河北零点新能源科技有限公司 | Lithium battery pack rapid assembly process |
| CN112331931B (en) * | 2020-11-11 | 2023-12-19 | 河北零点新能源科技有限公司 | Quick assembling process for lithium battery pack |
| CN113608139A (en) * | 2021-08-03 | 2021-11-05 | 傲普(上海)新能源有限公司 | Temperature monitoring method and manufacturing method of lithium ion battery |
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