CN110828905A - Method for manufacturing lithium ion battery - Google Patents
Method for manufacturing lithium ion battery Download PDFInfo
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- CN110828905A CN110828905A CN201911135813.0A CN201911135813A CN110828905A CN 110828905 A CN110828905 A CN 110828905A CN 201911135813 A CN201911135813 A CN 201911135813A CN 110828905 A CN110828905 A CN 110828905A
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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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
-
- 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
A method of manufacturing a lithium ion battery, comprising the steps of: s1, placing the bare cell in a dry environment for baking, placing the bare cell in a battery shell after baking, and injecting liquid in the dry environment; the bare cell is connected with a tab with a channel, and the channel is used for a liquid injection process of the bare cell; and S2, after the liquid injection is completed, a formation process is carried out, gas generated by the formation is also discharged from the channel, and then the channel is sealed, so that the preparation of the lithium ion battery is completed. Compared with the prior art, the invention firstly bakes the naked electric core, and the naked electric core which is not encapsulated is greatly increased in baking speed because the naked electric core is not wrapped by the external aluminum-plastic film. In addition, the invention adopts the pole lug with the channel for injecting liquid, so that the electrolyte is injected into the interior of the battery from the internal channel of the pole lug, and the generated gas is discharged from the channel, thereby reducing the use of the aluminum-plastic film, saving a large amount of aluminum-plastic films and lowering the production cost.
Description
Technical Field
The invention relates to the field of lithium batteries, in particular to a manufacturing method of a lithium ion battery.
Background
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 are mainly classified into cylindrical batteries, square batteries, and pouch batteries according to their shapes, and the cylindrical batteries and the square batteries are also called hard-shell batteries. Compared with a hard-shell battery, the soft-package battery has the advantages of flexible design, lighter weight, small internal resistance, difficult explosion, more cycle times, high energy density and the like, so that the soft-package battery occupies the market in a higher proportion in a short period and can be rapidly developed in the new energy electric automobile industry.
The soft package battery mainly comprises the following process flows: 1) stirring, coating, rolling and die cutting; 2) sheet-making winding or lamination and welding; 3) forming an aluminum plastic film and sealing the top side; 4) baking; 5) injecting liquid; 6) a formation step; 7) vacuumizing and secondary sealing; 8) and (4) carrying out subsequent procedures such as capacity grading and the like. In the traditional preparation process, a naked electric core is placed in an aluminum-plastic film with a good punched pit, then baking is carried out, and then processes such as liquid injection and formation are carried out. However, the traditional process has certain disadvantages: 1) the reserved aluminum-plastic film needs to be removed in the secondary sealing process, so that a large amount of aluminum-plastic film is wasted; 2) when the bare cell is baked, due to the wrapping of the aluminum-plastic film, the baking efficiency is low, and the preparation period is seriously influenced; 3) the preparation period of the lithium ion battery is long, and the preparation time from lamination to liquid injection is still 27 hours to finish the fastest preparation.
In view of the above, it is necessary to provide a technical solution to the above problems.
Disclosure of Invention
The invention aims to: the manufacturing method of the lithium ion battery greatly shortens the preparation period of the battery by adjusting and optimizing the process flow, saves the consumption of a large number of aluminum-plastic films, reduces the material cost of the battery, and improves the quality of the battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of manufacturing a lithium ion battery, comprising the steps of:
s1, placing the bare cell in a dry environment for baking, placing the bare cell in a battery shell after baking, and injecting liquid in the dry environment; the bare cell is connected with a tab with a channel, and the channel is used for a liquid injection process of the bare cell;
and S2, after the liquid injection is completed, a formation process is carried out, gas generated by the formation is also discharged from the channel, and then the channel is sealed, so that the preparation of the lithium ion battery is completed.
Under the dry environment, the invention firstly bakes the naked electric core, and the naked electric core which is not encapsulated is directly conducted to the naked electric core due to no package of an external aluminum-plastic film, so that the baking speed is greatly increased, and compared with the prior art, the baking time is at least shortened by a half; and after the baking is finished, the packaging is continued under a dry environment, the control of the humidity of the battery core in the packaging process is ensured, and meanwhile, the packaging time can be controlled. In addition, the invention adopts the pole lug with the channel to inject the electrolyte into the battery from the internal channel of the pole lug, compared with the prior art that the whole side of the air bag edge is taken as an inlet and outlet, the area of the inlet and outlet is greatly reduced, the precision of the injection and the consistency of products are ensured, and simultaneously the gas generated by formation is also discharged from the channel, thus, the use of the aluminum-plastic film can be reduced, a large amount of aluminum-plastic films are saved, and the production cost is reduced.
Preferably, in the step S1, the baking time is 0.1-1.5 h. Because the temperature of toasting can directly conduct to naked electric core, reduced the hindrance of plastic-aluminum membrane, its toasts the time and compares 2 ~ 4h in prior art, has shortened the preparation cycle of battery greatly. The specific baking time can be adjusted according to the capacity of the battery cell and the actual production environment.
More preferably, in the step S1, the baking time is 0.5-1 h.
Preferably, in the step S1, the drying environment is a drying environment with dew point temperature less than or equal to-35 ℃. At this dew point temperature, the moisture content in the air is low, has avoided moisture in the air to remain in naked electric core to and exert an influence to the performance of electrolyte.
Preferably, in the step S2, after the liquid injection is completed, an adhesive is used to seal an opening end of the channel, which is in contact with the outside, and then a formation process is performed. Because the gas generated after formation needs to be discharged, and the gas also needs to be discharged from the tab channel, the sealing before formation only needs to be simply sealed by common adhesive substances such as adhesive and the like, so that the tab can be opened again later.
Preferably, the adhesive comprises at least one of glue and solid glue.
Preferably, in step S2, before the formation process is started, the adhesive film is pierced through the opening end of the channel, which is in contact with the outside, and then the generated gas is discharged from the channel. The passage of the pole lug is fine, so that the gas is exhausted under the negative pressure condition, and the generated gas is exhausted completely by using pressure to prevent residue.
Preferably, the tab is further provided with a vent hole communicated with the channel, and the vent hole is located in the battery shell. And the surface of the tab is also provided with tab glue, namely the air hole is arranged at the lower part of the tab glue. The air vent is additionally arranged in the tab, when the tab is welded with the naked battery cell, even if the channel of the part is blocked by welding, the liquid injection and the exhaust of the naked battery cell can be accessed from the air vent, and the smoothness of the channel is further ensured; of course, if the channel at the welding position is not blocked, the liquid injection and the air exhaust can be simultaneously carried out at two positions, and the speed of the liquid injection and the air exhaust is improved.
Preferably, in the S2 step, the sealing includes one or more of laser welding sealing, ultrasonic welding sealing and jig heat pressing sealing. When sealing, the electrode lug can be compressed in advance by using auxiliary tools such as a clamp and the like, and then the electrode lug is further pressed and welded by adopting the sealing method, so that the inner part of the electrode lug is ensured to reach a sealing state, and the use of the subsequent conductive function of the electrode lug is not influenced.
Preferably, in the step S2, after the sealing is completed, the step further includes a capacity grading process for the bare cell.
The invention has the beneficial effects that:
1) a method of manufacturing a lithium ion battery, comprising the steps of: s1, placing the bare cell in a dry environment for baking, placing the bare cell in a battery shell after baking, and injecting liquid in the dry environment; the bare cell is connected with a tab with a channel, and the channel is used for a liquid injection process of the bare cell; and S2, after the liquid injection is completed, a formation process is carried out, gas generated by the formation is also discharged from the channel, and then the channel is sealed, so that the preparation of the lithium ion battery is completed. Compared with the prior art, the bare cell is baked firstly, and the bare cell which is not packaged is directly conducted to the bare cell due to the fact that the bare cell is not wrapped by an external aluminum-plastic film, so that the baking speed of the bare cell is greatly increased, and half of baking time is at least shortened; and after the baking is finished, the packaging is continued under a dry environment, the control of the humidity of the battery core in the packaging process is ensured, and meanwhile, the packaging time can be controlled. In addition, the invention adopts the pole lug with the channel for injecting liquid, so that the electrolyte is injected into the interior of the battery from the internal channel of the pole lug, and the generated gas is discharged from the channel, thereby reducing the use of the aluminum-plastic film, saving a large amount of aluminum-plastic films and lowering the production cost.
2) The invention utilizes the tab channel to carry out liquid injection and exhaust, and the generated gas is directly exhausted, thereby reducing the secondary sealing process, further improving the production efficiency and reducing the preparation period of the battery. In addition, the lug is also provided with the vent hole, so that the smoothness of a lug channel is further ensured, and the normal operation of liquid injection and exhaust is realized.
Drawings
Fig. 1 is a schematic structural view of a tab of the present invention.
Fig. 2 is a side view schematically illustrating a tab according to the present invention.
FIG. 3 is a schematic view of the preparation process of the present invention.
In the figure: 1-a tab; 11-a channel; 12-a vent hole; 2-pole ear glue.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the present invention and its advantages will be described in further detail below with reference to the following detailed description and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1 to 2, a method for manufacturing a lithium ion battery includes the following steps:
s1, preparing a positive plate taking lithium cobaltate as a positive electrode material and a negative plate taking graphite as a negative electrode material according to a conventional lithium ion battery manufacturing process, and laminating the positive plate, the negative plate and the diaphragm into a bare cell.
S2, placing the bare cell in a drying environment with the dew point temperature less than or equal to-35 ℃ for baking for 0.1-1.5 h, preferably 0.5-1 h; and after baking, placing the bare cell in a battery shell for packaging for 10min, and then injecting liquid in the same dry environment for about 20 min. Wherein, naked electric core is connected with utmost point ear 1 that has passageway 11, passageway 11 is used for the notes liquid process of naked electric core, and utmost point ear 1 surface is provided with utmost point ear glue 2. In addition, before annotating the liquid, can carry out the evacuation step earlier, make the inside decompression of naked electric core to vacuum state, be favorable to subsequent notes liquid process more. Preferably, the tab 1 is further provided with a vent hole 12 communicating with the channel 11, and the vent hole 12 is provided in the battery case for injecting an electrolyte or discharging a gas generated in the chemical conversion process. When utmost point ear and naked electric core welding, the setting of this air vent can guarantee the smooth and easy of utmost point ear passageway, even the passway mouth of splice is sealed, annotates the liquid and can follow this air vent business turn over with the exhaust equally.
S3, after liquid injection is completed, sealing the opening end of the channel 11 in the tab 1, which is in contact with the outside, by using an adhesive, standing at high temperature for 20 hours, and performing a formation process after the bare cell absorbs electrolyte; the adhesive comprises at least one of glue and solid glue. Before formation, a glue film at the opening end of a channel 11 in a tab 1, which is in contact with the outside, is punctured in advance, the tab channel 11 of the lithium ion battery is connected with a negative pressure channel, current is connected with the tab 1 through the negative pressure channel, and formation time is 2 h. At the same time, under negative pressure, the gas generated by the formation is discharged from the passage 11 without adding an extra air pocket for exhausting.
S4, sealing the channel 11 after the formation is finished, wherein the sealing comprises one or more of laser welding sealing, ultrasonic welding sealing and clamp hot-pressing sealing; the packaging time is 10 min. When sealing, the electrode lug 1 can be compressed in advance by using auxiliary tools such as a clamp and the like, and then the electrode lug 1 is further pressed and welded by adopting the sealing method, so that the inside of the electrode lug 1 is ensured to reach a sealing state, and the use of the subsequent conductive function of the electrode lug is not influenced.
And S5, finally performing subsequent procedures such as capacity grading and the like to finish the preparation of the lithium ion battery.
Comparative example 1
A method of manufacturing a lithium ion battery, comprising the steps of:
s1, preparing a positive plate taking lithium cobaltate as a positive electrode material and a negative plate taking graphite as a negative electrode material according to a conventional lithium ion battery manufacturing process, and laminating the positive plate, the negative plate and the diaphragm into a bare cell.
S2, placing the bare cell in a battery shell for packaging for 10 min; then, placing the bare cell in a drying environment with the dew point temperature of less than or equal to-35 ℃ for baking for 2-4 h; and injecting liquid into the bare cell in the same dry environment after baking is finished, wherein the liquid injection time is about 20 min. Before annotating the liquid, can carry out the evacuation step earlier, make the inside decompression of naked electric core to vacuum state, be favorable to subsequent notes liquid process more.
And S3, standing at high temperature for 20h after liquid injection is completed, and performing a formation procedure after the bare cell absorbs the electrolyte for 2 h.
And S4, after the formation is finished, discharging the generated gas from one side of the air bag to perform a secondary sealing process, wherein the time of the secondary sealing process is 2 hours, and finally performing subsequent processes such as capacity grading and the like to finish the preparation of the lithium ion battery.
From the comparison between example 1 and comparative example 1, the preparation time of the latest preparation method of the invention is only 24 hours, while the preparation period of comparative example 1 is 27 hours, namely 22 hours, while the preparation period of the longest preparation method of comparative example 1 is 28.5 hours. The invention mainly has the advantages that the baking and packaging sequence is changed, and the naked battery core can be quickly baked in a naked state, so that the baking time is at least shortened by half, and the preparation period of the battery is shortened to some extent; in addition, the invention adopts the method of pole ear liquid injection, the channel in the pole ear is used for liquid injection, and the channel is also used for subsequent exhaust, thereby omitting two sealing procedures, further shortening the preparation period of the lithium ion battery, saving a large amount of aluminum-plastic films and reducing the production cost.
It will be evident to those skilled in the art from the foregoing disclosure and teachings that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should understand that the embodiments as a whole may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A method for manufacturing a lithium ion battery, comprising the steps of:
s1, placing the bare cell in a dry environment for baking, placing the bare cell in a battery shell after baking, and injecting liquid in the dry environment; the bare cell is connected with a tab with a channel, and the channel is used for injecting liquid into the bare cell;
and S2, after the liquid injection is completed, a formation process is carried out, gas generated by the formation is also discharged from the channel, and then the channel is sealed, so that the preparation of the lithium ion battery is completed.
2. The method according to claim 1, wherein in the step S1, the baking time is 0.1-1.5 h.
3. The method according to claim 2, wherein in the step S1, the baking time is 0.5-1 h.
4. The method according to claim 1, wherein in the step S1, the drying environment is a drying environment with a dew point temperature of ≦ -35 ℃.
5. The method according to claim 1, wherein in the step S2, after the liquid injection is completed, an opening end of the channel, which is in contact with the outside, is sealed with an adhesive, and then a formation process is performed.
6. The method of claim 5, wherein in step S2, before the formation process is started, the adhesive film is pierced through the opening of the channel, which is in contact with the outside, to discharge the generated gas from the channel.
7. The method of claim 1, wherein the tab is further provided with a vent hole in communication with the channel, and the vent hole is located in the battery case.
8. The method of claim 1, wherein in the step of S2, the sealing comprises one or more of laser welding, ultrasonic welding and jig heat pressing.
9. The method according to claim 1, wherein in step S2, after sealing, the step further includes a capacity grading step for the bare cell.
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| CN201911135813.0A CN110828905A (en) | 2019-11-19 | 2019-11-19 | Method for manufacturing lithium ion battery |
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| CN201911135813.0A CN110828905A (en) | 2019-11-19 | 2019-11-19 | Method for manufacturing lithium ion battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335880A (en) * | 2020-09-24 | 2022-04-12 | 比亚迪股份有限公司 | Utmost point ear and laminate polymer battery |
| CN114530625A (en) * | 2022-02-17 | 2022-05-24 | 厦门海辰新能源科技有限公司 | Production process of lithium battery and lithium battery |
| EP4174978A1 (en) * | 2021-10-28 | 2023-05-03 | Lilium eAircraft GmbH | Battery cell comprising degassing channels and/or paths of weakness |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310564A (en) * | 1987-06-12 | 1988-12-19 | Matsushita Electric Ind Co Ltd | Manufacture of paste type cadmium negative electrode |
| JP2003031206A (en) * | 2001-05-09 | 2003-01-31 | Toyota Motor Corp | Storage battery element, its manufacturing method, and terminal |
| CN1893163A (en) * | 2005-06-30 | 2007-01-10 | 深圳市比克电池有限公司 | Method for enclosuring liquid-filling hole of lithium ion cell and cell thereof |
| CN102969526A (en) * | 2011-09-01 | 2013-03-13 | 海洋王照明科技股份有限公司 | Lithium ion battery and its liquid injection method |
| CN105322232A (en) * | 2015-10-16 | 2016-02-10 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN105322216A (en) * | 2015-10-16 | 2016-02-10 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN105390749A (en) * | 2015-10-16 | 2016-03-09 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN206250265U (en) * | 2016-12-21 | 2017-06-13 | 国联汽车动力电池研究院有限责任公司 | Can fluid injection lug and lithium battery |
-
2019
- 2019-11-19 CN CN201911135813.0A patent/CN110828905A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310564A (en) * | 1987-06-12 | 1988-12-19 | Matsushita Electric Ind Co Ltd | Manufacture of paste type cadmium negative electrode |
| JP2003031206A (en) * | 2001-05-09 | 2003-01-31 | Toyota Motor Corp | Storage battery element, its manufacturing method, and terminal |
| CN1893163A (en) * | 2005-06-30 | 2007-01-10 | 深圳市比克电池有限公司 | Method for enclosuring liquid-filling hole of lithium ion cell and cell thereof |
| CN102969526A (en) * | 2011-09-01 | 2013-03-13 | 海洋王照明科技股份有限公司 | Lithium ion battery and its liquid injection method |
| CN105322232A (en) * | 2015-10-16 | 2016-02-10 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN105322216A (en) * | 2015-10-16 | 2016-02-10 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN105390749A (en) * | 2015-10-16 | 2016-03-09 | 广东烛光新能源科技有限公司 | Preparation method of electrochemical cell |
| CN206250265U (en) * | 2016-12-21 | 2017-06-13 | 国联汽车动力电池研究院有限责任公司 | Can fluid injection lug and lithium battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335880A (en) * | 2020-09-24 | 2022-04-12 | 比亚迪股份有限公司 | Utmost point ear and laminate polymer battery |
| EP4174978A1 (en) * | 2021-10-28 | 2023-05-03 | Lilium eAircraft GmbH | Battery cell comprising degassing channels and/or paths of weakness |
| CN114530625A (en) * | 2022-02-17 | 2022-05-24 | 厦门海辰新能源科技有限公司 | Production process of lithium battery and lithium battery |
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