CN112448041A - Production method of soft package lithium ion battery - Google Patents
Production method of soft package lithium ion battery Download PDFInfo
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- CN112448041A CN112448041A CN202011384940.7A CN202011384940A CN112448041A CN 112448041 A CN112448041 A CN 112448041A CN 202011384940 A CN202011384940 A CN 202011384940A CN 112448041 A CN112448041 A CN 112448041A
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- battery cell
- lithium ion
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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
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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
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- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a production method of a soft package lithium ion battery, which is characterized by comprising the following steps of: placing the battery cell into an oven and baking; immersing the baked battery cell into electrolyte, and aging for 5-120 min; loading the soaked battery cell into a clamp, and applying high temperature of 60-100 ℃ and pressure of 0.1-0.5Mpa to the battery cell by the clamp to form the battery cell; the formed battery cell is arranged in an aluminum plastic film, and top sealing and side sealing at two sides are carried out to complete packaging; the production method of the soft package lithium ion battery provided by the invention can effectively shorten the aging time, further improve the production efficiency, improve the liquid absorption capacity of the battery cell and improve the cycle performance of the soft package lithium ion battery.
Description
All as the field of technology
The invention relates to the technical field of soft package lithium ion batteries, in particular to a production method of a soft package lithium ion battery.
All the above-mentioned background techniques
The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. Lithium ion batteries can be classified into hard-shell lithium ion batteries and soft-package lithium ion batteries according to the shape. Compared with a hard shell lithium ion battery, the soft package lithium ion battery has the advantages of flexible design, lighter weight, small internal resistance, difficult explosion, more cycle times, high energy density and the like, and the new energy electric automobile industry is rapidly developed.
At present, a common production method for a soft package lithium ion battery comprises the following steps: obtaining a battery cell in a lamination or winding mode; packaging the battery cell into an aluminum plastic film, carrying out primary packaging, and reserving the air bag to obtain a primary packaged battery; after the first packaging is finished, baking the battery for 2 hours; after baking is finished, injecting liquid into the battery, and sealing the side of the air bag after injecting the liquid; after the liquid injection is finished, aging the battery; after the aging is finished, the battery is put into a pressure clamp for formation, and formation is carried out; after the formation is finished, packaging the battery for the second time, vacuumizing, discharging waste gas generated by the formation, and cutting off the airbag to obtain a packaged battery for the second time; after the secondary packaging is completed, sorting and OCV testing are performed, and the obtained qualified battery is recorded as D1.
The cycle performance test was performed on D1 and the test results are shown in table 1 below:
TABLE 1D 1 test chart for cycle performance
This prior production method has the following drawbacks: (1) the lithium ion battery needs to be aged for 24-48 h after liquid injection, so that the pole piece and the diaphragm are soaked by the electrolyte, the aging time is long, the production efficiency is influenced, and the problem of insufficient soaking is easily caused; (2) gas is generated during the formation of the battery, so that the displacement of the battery core in the aluminum-plastic film is easy to occur, and waste gas generated by the formation cannot be discharged in time, so that the cycle performance of the battery is influenced; (3) when the second packaging and vacuumizing is carried out, part of electrolyte is extracted along with the second packaging and vacuumizing, so that the consistency of the battery is poor, and the cycle performance of the battery is influenced.
Therefore, by improving the production process, the aging time of the soft package lithium ion battery is shortened, and the cycle performance of the soft package lithium ion battery is improved, which becomes a technical problem to be solved by the technical personnel in the field.
All the contents of the invention
The invention aims to provide a production method of a soft package lithium ion battery, which shortens the aging time of the soft package lithium ion battery and improves the cycle performance of the lithium ion battery.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
the production method of the soft package lithium ion battery is characterized by comprising the following steps:
placing the battery cell into an oven and baking;
immersing the baked battery cell into electrolyte, and aging for 5-120 min;
loading the soaked battery cell into a clamp, and applying high temperature of 60-100 ℃ and pressure of 0.1-0.5Mpa to the battery cell by the clamp to form the battery cell;
and (4) packaging the formed battery cell into a packaging film for packaging.
As a specific embodiment, before the battery cell is placed in an oven for baking, the battery cell is obtained by lamination or winding.
Further, according to a conventional soft package lithium ion battery production process, positive and negative pole pieces are obtained through batching, coating, rolling and slitting; and then winding the cut positive and negative pole pieces and the diaphragm to obtain the battery core.
As a specific embodiment, the temperature of baking the battery cell by the oven is 85 ± 5 ℃.
In a specific embodiment, the time for baking the battery cell by the oven is 2 hours, and the moisture requirement is less than or equal to 150 ppm.
In a specific embodiment, the temperature of the electrolyte is 0 ℃ to 45 ℃.
Further, the temperature of the electrolyte is 25 ℃ ± 5 ℃.
In a specific embodiment, the battery cell is immersed in the electrolyte, and after aging, the liquid absorption coefficient of the battery cell is more than or equal to 1.5.
Further, the battery core is immersed in the electrolyte, and after aging, the liquid absorption coefficient of the battery core is more than or equal to 1.5 and less than or equal to 2.0.
In a specific embodiment, the clamp applies a high temperature of 80 ℃ +/-5 ℃ to the battery cell.
Further, the baking, the aging and the formation of the battery core are carried out in a dry and oxygen-free environment, and the dew point temperature in the environment is less than or equal to-31 ℃.
Further, before the battery cell is placed into an oven, negative pressure treatment is carried out inside the oven, and the vacuum degree is less than or equal to-95 Kpa; when the battery core is formed, the inner cavity of the clamp keeps a negative pressure condition.
The invention has the beneficial effects that:
the production method of the soft package lithium ion battery provided by the invention can effectively shorten the aging time, further improve the production efficiency, improve the liquid absorption capacity of the battery cell and improve the cycle performance of the soft package lithium ion battery. Further, the production method of the soft package lithium ion battery provided by the application has no constraint of an aluminum plastic film in the formation process, and waste gas generated in the formation process can be discharged in time, so that the cycle performance of the battery is improved. Furthermore, the production method of the soft package lithium ion battery provided by the application does not need to reserve an air bag, does not need to seal twice, and simplifies the process flow. Meanwhile, the production method of the soft package lithium ion battery can avoid electrolyte remained in the aluminum-plastic film shell, and solves the problem that the battery cell easily slides relative to the aluminum-plastic film shell due to the electrolyte remained in the aluminum-plastic film shell.
Description of the drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. The drawings in the following description are only embodiments of the invention and other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic flow chart of a production method of a soft package lithium ion battery provided in an embodiment of the present invention;
fig. 2 is a schematic flow chart of a production method of a soft package lithium ion battery provided in the second embodiment of the present invention;
fig. 3 is a schematic flow chart of a production method of a soft package lithium ion battery provided in the third embodiment of the present invention.
(specific embodiments) in all cases
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 1, a method for producing a soft package lithium ion battery includes the following steps:
s110, obtaining a battery cell in a lamination or winding mode;
in the embodiment, according to a conventional soft package lithium ion battery production process, positive and negative electrode plates are obtained through batching, coating, rolling and slitting; and then winding the cut positive and negative pole pieces and the diaphragm to obtain the battery core.
S120, placing the battery cell into an oven for baking;
in this embodiment, the temperature of baking the battery cell by the oven is 85 ± 5 ℃; the time for baking the battery cell in the oven is 2 hours, and the water content is required to be less than or equal to 150 ppm; before the battery cell is placed into an oven, the oven is vacuumized, and the vacuum degree is less than or equal to-95 Kpa.
In the embodiment, the battery cell is baked to meet the moisture requirement of less than or equal to 150ppm, so that residual moisture in the battery cell can be effectively removed, and the influence of the moisture on the battery performance and an SEI film is avoided.
S130, immersing the baked battery cell into electrolyte, and aging for 20 min;
in the embodiment, the baked battery core is immersed in the electrolyte for aging in a dry and oxygen-free environment, and the dew point temperature in the environment is less than or equal to-31 ℃; the electrolyte temperature is 25 ℃, the liquid absorption coefficient of the cell is more than or equal to 1.5 and less than or equal to 2.0, wherein the liquid absorption coefficient is the liquid absorption amount (g)/the cell capacity (Ah), and the aging time of the cell depends on the liquid absorption coefficient.
In other embodiments, the liquid absorption coefficient of the battery cell is greater than or equal to 1.5, and in the preferred embodiment, the liquid absorption coefficient is greater than or equal to 1.5 and less than or equal to 2.0; in other embodiments, the electrolyte temperature is 25 ℃. + -. 5 ℃ and in the preferred embodiment, the electrolyte temperature is 25 ℃.
S140, placing the soaked battery cell into a clamp, and applying the high temperature of 80 ℃ and the pressure of 0.3Mpa to the battery cell by the clamp to form the battery cell;
in this embodiment, after the infiltration is completed, when the battery cell is formed, the inner cavity of the clamp is repeatedly vacuumized, and a negative pressure condition is maintained; after the infiltration is finished, the formation of the battery core is carried out in a dry and oxygen-free environment, and the dew point temperature in the environment is less than or equal to-31 ℃; in order to ensure that the dew point temperature is less than or equal to-31 ℃, continuous vacuum pumping is required; the purpose of formation is to form a compact SEI film for the lithium ion battery; meanwhile, in the embodiment, because the aluminum-plastic film is not bound, waste gas generated in the formation process can be discharged in time, and the influence on the cycle performance of the battery is reduced.
In the embodiment, the clamp for formation applies a high temperature of 80 ℃ to the battery cell, and in other embodiments, the clamp for formation applies a high temperature of 80 ℃ ± 5 ℃ to the battery cell.
And S150, packaging the formed battery cell into a packaging film, and packaging.
In this embodiment, after the formation is completed, the encapsulation of the battery cell is performed in a dry and oxygen-free environment, and the dew point temperature in the environment is less than or equal to 31 ℃; after formation is finished, the battery cell is packaged by adopting an aluminum-plastic film with the thickness of 0.088mm, top sealing is firstly carried out during packaging, and then side sealing is carried out on two sides.
In the embodiment, the environment of infiltration, formation and encapsulation requires no oxygen, the dew point temperature is less than or equal to-31 ℃, the moisture in the cell core can be reduced, and the cell core is prevented from reacting with water in the formation charging and discharging processes to influence the formation of an SEI film.
In the embodiment, because the battery is not provided with the air bag, secondary sealing is not needed after packaging, and the technical problem that part of electrolyte is extracted along with the secondary packaging and vacuumizing in the prior art is solved; step S150, after completing the primary packaging, may directly perform sorting and OCV testing (open circuit voltage testing); sorting can screen out batteries with unqualified capacity, and the OCV test can screen out batteries with over-discharge, so that the obtained qualified batteries are marked as C1.
In this example, the cycle performance test of C1 was performed to obtain the following test results in Table 2 below:
TABLE 2C 1 CYCLIC PERFORMANCE TEST TABLE
Comparing table 2 with table 1, it can be seen that, compared with the prior art, the aging time of the soft package lithium ion battery prepared by the production method of the soft package lithium ion battery in the first embodiment is obviously shortened, the cycle performance of the soft package lithium ion battery is obviously improved, and the liquid absorption amount is also obviously improved.
Example two
As shown in fig. 2, the present embodiment is different from the first embodiment in that: in step S130, the time for cell aging is 5 min.
In this example, the finally obtained acceptable cell was denoted as C2.
In this example, the cycle performance test of C2 gave the following test results in Table 3:
TABLE 3C 2 CYCLIC PERFORMANCE TEST TABLE
Comparing table 3 with table 1, it can be seen that, compared with the prior art, the aging time of the soft package lithium ion battery prepared by the production method of the soft package lithium ion battery in the second embodiment is obviously shortened, the cycle performance of the soft package lithium ion battery is obviously improved, and the liquid absorption amount is also obviously improved.
EXAMPLE III
As shown in fig. 3, the present embodiment is different from the first embodiment in that: in step S130, the time for soaking the battery core is 120 min.
In this example, the finally obtained acceptable cell was denoted as C3.
In this example, the cycle performance test of C3 was performed to obtain the following test results as shown in Table 4 below:
TABLE 4C 3 CYCLIC PERFORMANCE TEST TABLE
Comparing table 4 with table 1, it can be seen that, compared with the prior art, the aging time of the soft package lithium ion battery prepared by the production method of the soft package lithium ion battery in the third embodiment is obviously shortened, the cycle performance of the soft package lithium ion battery is obviously improved, and the liquid absorption amount is also obviously improved.
Example four
The difference between this embodiment and the first embodiment is: when the cell is soaked, the temperature of the electrolyte is 0 ℃.
In this example, the finally obtained acceptable cell was denoted as C4.
In this example, the cycle performance test of C4 gave the following test results as shown in Table 5 below:
TABLE 5C 4 CYCLIC PERFORMANCE TEST TABLE
Comparing table 5 with table 1, it can be seen that, compared with the prior art, the aging time of the soft package lithium ion battery prepared by the production method of the soft package lithium ion battery in the fourth embodiment is obviously shortened, the cycle performance of the soft package lithium ion battery is obviously improved, and the liquid absorption amount is also obviously improved.
EXAMPLE five
The difference between this embodiment and the first embodiment is: when the battery core is soaked, the temperature of the electrolyte is 45 ℃.
In this example, the finally obtained acceptable cell was denoted as C5.
In this example, the cycle performance test of C5 gave the following test results as shown in Table 6 below:
TABLE 6C 5 CYCLIC PERFORMANCE TEST TABLE
Comparing table 6 with table 1, it can be seen that, compared with the prior art, the aging time of the soft package lithium ion battery prepared by the production method of the soft package lithium ion battery in the fifth embodiment is obviously shortened, the cycle performance of the soft package lithium ion battery is obviously improved, and the liquid absorption amount is also obviously improved.
EXAMPLE six
The difference between this embodiment and the first embodiment is: when the battery cell is formed, the clamp applies high temperature of 60 ℃ to the battery cell.
EXAMPLE six
The difference between this embodiment and the first embodiment is: when the battery cell is formed, the clamp applies 100 ℃ high temperature to the battery cell.
EXAMPLE seven
The difference between this embodiment and the first embodiment is: when the battery cell is formed, the clamp applies 0.1Mpa pressure to the battery cell.
EXAMPLE seven
The difference between this embodiment and the first embodiment is: when the battery cell is formed, the clamp applies 0.5Mpa pressure to the battery cell.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The production method of the soft package lithium ion battery is characterized by comprising the following steps:
placing the battery cell into an oven and baking;
immersing the baked battery cell into electrolyte, and aging for 5-120 min;
loading the soaked battery cell into a clamp, and applying high temperature of 60-100 ℃ and pressure of 0.1-0.5Mpa to the battery cell by the clamp to form the battery cell;
and (4) packaging the formed battery cell into a packaging film for packaging.
2. The production method of the soft package lithium ion battery according to claim 1, characterized in that: the temperature of baking the battery cell by the oven is 85 +/-5 ℃.
3. The production method of the soft package lithium ion battery according to claim 1, characterized in that: the time for baking the battery cell by the oven is 2 hours, and the water content requirement is less than or equal to 150 ppm.
4. The production method of the soft package lithium ion battery according to claim 1, characterized in that: the temperature of the electrolyte is 0-45 ℃.
5. The production method of the soft package lithium ion battery according to claim 4, characterized in that: the temperature of the electrolyte is 25 +/-5 ℃.
6. The production method of the soft package lithium ion battery according to claim 1, characterized in that: and the battery cell is immersed in the electrolyte, and after the battery cell is aged, the liquid absorption coefficient of the battery cell is more than or equal to 1.5.
7. The production method of the soft package lithium ion battery according to claim 6, characterized in that: and after the battery cell is immersed in the electrolyte and aged, the liquid absorption coefficient of the battery cell is more than or equal to 1.5 and less than or equal to 2.0.
8. The production method of the soft package lithium ion battery according to claim 1, characterized in that: and the clamp applies high temperature of 80 +/-5 ℃ to the battery cell.
9. The production method of the soft package lithium ion battery according to any one of claims 1 to 7, characterized in that: the baking, the aging and the formation of the battery cell are carried out in a dry and oxygen-free environment, and the dew point temperature in the environment is less than or equal to-31 ℃.
10. The production method of the soft package lithium ion battery according to any one of claims 1 to 7, characterized in that: before the battery cell is placed into an oven, negative pressure treatment is carried out inside the oven, and the vacuum degree is less than or equal to-95 Kpa; when the battery core is formed, the inner cavity of the clamp keeps a negative pressure condition.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577211A (en) * | 2014-12-30 | 2015-04-29 | 东莞市西特新能源科技有限公司 | Battery preparation method for improving cycle performance of lithium ion battery |
| CN104617346A (en) * | 2014-12-25 | 2015-05-13 | 山东精工电子科技有限公司 | Method for measuring liquid injection amount of polymer lithium-ion battery |
| CN104752773A (en) * | 2015-04-01 | 2015-07-01 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
| CN106848177A (en) * | 2017-03-08 | 2017-06-13 | 江西迪比科股份有限公司 | A kind of liquid injection process of lithium rechargeable battery |
| US20170214098A1 (en) * | 2014-05-08 | 2017-07-27 | Sei Corporation | Lithium secondary battery |
| CN107768732A (en) * | 2017-09-05 | 2018-03-06 | 东莞市迈科新能源有限公司 | A kind of preparation method of no aerogenesis cylindrical lithium ion battery |
| CN107994261A (en) * | 2017-11-27 | 2018-05-04 | 覃晓捷 | A kind of soft bag lithium ionic cell production method |
| CN109654819A (en) * | 2018-12-04 | 2019-04-19 | 广州市融成锂能锂电池有限公司 | A kind of baking process of Soft Roll lithium-ion electric core |
| CN110690506A (en) * | 2019-09-30 | 2020-01-14 | 深圳君耀投资合伙企业(有限合伙) | Lithium ion battery assembling method and lithium ion battery |
-
2020
- 2020-11-30 CN CN202011384940.7A patent/CN112448041B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170214098A1 (en) * | 2014-05-08 | 2017-07-27 | Sei Corporation | Lithium secondary battery |
| CN104617346A (en) * | 2014-12-25 | 2015-05-13 | 山东精工电子科技有限公司 | Method for measuring liquid injection amount of polymer lithium-ion battery |
| CN104577211A (en) * | 2014-12-30 | 2015-04-29 | 东莞市西特新能源科技有限公司 | Battery preparation method for improving cycle performance of lithium ion battery |
| CN104752773A (en) * | 2015-04-01 | 2015-07-01 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
| CN106848177A (en) * | 2017-03-08 | 2017-06-13 | 江西迪比科股份有限公司 | A kind of liquid injection process of lithium rechargeable battery |
| CN107768732A (en) * | 2017-09-05 | 2018-03-06 | 东莞市迈科新能源有限公司 | A kind of preparation method of no aerogenesis cylindrical lithium ion battery |
| CN107994261A (en) * | 2017-11-27 | 2018-05-04 | 覃晓捷 | A kind of soft bag lithium ionic cell production method |
| CN109654819A (en) * | 2018-12-04 | 2019-04-19 | 广州市融成锂能锂电池有限公司 | A kind of baking process of Soft Roll lithium-ion electric core |
| CN110690506A (en) * | 2019-09-30 | 2020-01-14 | 深圳君耀投资合伙企业(有限合伙) | Lithium ion battery assembling method and lithium ion battery |
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