CN111261949B - Method for manufacturing soft package battery - Google Patents
Method for manufacturing soft package battery Download PDFInfo
- Publication number
- CN111261949B CN111261949B CN202010075475.2A CN202010075475A CN111261949B CN 111261949 B CN111261949 B CN 111261949B CN 202010075475 A CN202010075475 A CN 202010075475A CN 111261949 B CN111261949 B CN 111261949B
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- Prior art keywords
- air duct
- sealing plug
- sealing
- soft package
- vacuum
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
The invention discloses a manufacturing method of a soft package battery, which comprises the following steps: providing an air duct, wherein one end of the air duct is a vacuum connection end, and the other end of the air duct is a free end; inserting the free end of the air duct into an aluminum-plastic film air bag of the soft package battery with the injected liquid, and arranging the vacuum connecting end outside the aluminum-plastic film air bag; sealing the outer wall of the air duct and the edge of the aluminum plastic film air bag; providing a sealing plug, and sealing the vacuum connection end of the air duct through the sealing plug; soaking and standing the soft package battery; removing the sealing plug and connecting the vacuum connecting end of the air duct with a vacuum system; vacuumizing the soft package battery through a vacuum system; performing a formation process on the soft package battery; the vacuum system is removed and the vacuum connection of the airway is sealed by a sealing plug. The size of the reserved air bag of the soft package battery can be effectively reduced, the usage amount of the aluminum plastic film is reduced, and the material cost is reduced.
Description
Technical Field
The invention relates to the technical field of manufacturing and processing of soft-package batteries, in particular to a manufacturing method of a soft-package battery.
Background
The new energy battery is used as a power source of the new energy automobile, and has been rapidly developed in recent years, wherein the soft package battery has the characteristics of high safety performance, light weight, large energy density, small internal resistance, long service life and the like, is widely applied to commercial vehicles and passenger vehicles, and has a larger occupation ratio in the lithium ion battery; the formation is an important procedure in the soft package battery manufacturing process, the current soft package battery formation process mainly depends on applying larger pressure to discharge generated gas into a reserved air bag, the air bag is reserved greatly to cause serious aluminum plastic film waste, and meanwhile, the requirement on a pressurizing system and a clamp of pressure formation equipment is higher, so that the cost waste is serious.
It is therefore desirable to provide a method of manufacturing a flexible battery that reduces the size of a plastic film airbag and reduces the cost of compression molding.
Disclosure of Invention
The invention aims to provide a manufacturing method of a soft package battery, which can reduce the size of an aluminum plastic film air bag and reduce the cost of pressure formation.
In order to achieve the above object, the present invention provides a method for manufacturing a soft pack battery, comprising:
providing an air duct, wherein one end of the air duct is a vacuum connection end, and the other end of the air duct is a free end;
inserting the free end of the air duct into an aluminum-plastic film air bag of the soft package battery with the injected liquid, and arranging the vacuum connecting end outside the aluminum-plastic film air bag;
sealing the outer wall of the air duct and the edge of the aluminum plastic film air bag;
providing a sealing plug, wherein one end of the sealing plug can be in sealing connection with the vacuum connection of the air duct;
sealing the vacuum connection end of the air duct through the sealing plug, and performing a soaking and standing procedure on the soft package battery;
after the soaking and standing process is finished, removing the sealing plug and connecting the vacuum connecting end of the air duct with a vacuum system;
vacuumizing the soft package battery through the vacuum system;
after the vacuumizing treatment is completed, performing a formation procedure on the soft package battery;
after the formation procedure is completed, the vacuum system is removed, and the vacuum connection end of the air duct is sealed through the sealing plug.
Optionally, after removing the sealing plug and before connecting the vacuum connection end of the air duct with a vacuum system, further comprising:
and moving the soft package battery to a charge and discharge test cabinet, and connecting an electrode of the soft package battery with a power supply provided by the charge and discharge test cabinet.
Optionally, the forming process of the soft package battery includes:
and carrying out charge and discharge operation on the soft package battery through the charge and discharge test cabinet.
Optionally, the sealing treatment between the outer wall of the air duct and the edge of the aluminum plastic film air bag comprises:
and sealing the edges of the aluminum-plastic film air bags and the edges of the outer walls of the air guide pipes and the aluminum-plastic air bags in a heat packaging or ultrasonic packaging mode.
Optionally, the air duct includes base pipe and needle bar, the one end of base pipe is the vacuum link, the one end of needle bar is the free end, the other end of base pipe with the other end of needle bar is connected, the edge of free end is equipped with the chamfer.
Optionally, a first channel is arranged in the base pipe, a second channel is arranged in the needle bar, the first channel is communicated with the second channel, and the diameter of the first channel is smaller than that of one end of the sealing plug.
Optionally, an annular groove is formed in the inner wall of the first channel, and an annular protrusion matched with the annular groove is formed in the outer wall of the one end of the sealing plug.
Optionally, sealing the vacuum connection end of the air duct by the sealing plug includes:
inserting the one end of the sealing plug into the orifice of the vacuum connection end, and matching the annular protrusion of the sealing plug with the annular groove of the inner wall of the first channel.
Optionally, the air duct is made of polypropylene, and the base tube and the needle bar are integrally formed.
Optionally, the sealing plug is made of rubber, and the one end of the sealing plug is provided with a conical guide head.
The invention has the beneficial effects that:
in the negative pressure formation process of the soft package battery, after the soft package battery finishes liquid injection, an air duct is arranged in an aluminum plastic film air bag reserved by the soft package battery and is sealed at the edge of the aluminum plastic film, an air path communicated with the inside and the outside of the air bag is formed, then a vacuum connecting end of the air path is sealed in a sealing plug manner to finish a battery soaking and standing process, then the rubber plug is removed to connect the vacuum connecting end of the air duct with a vacuum system for negative pressure formation, the air duct is sealed through the sealing plug after the negative pressure formation is finished, the vacuum degree inside the soft package battery is ensured so as to finish a subsequent process, the size of the air bag reserved by the soft package battery can be effectively reduced by combining the air duct with the sealing plug, the use amount of the aluminum plastic film is reduced, the material cost is reduced, and the manufacturing cost of the negative pressure formation of the soft package battery is effectively reduced.
The device of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a step diagram of a method of manufacturing a soft pack battery according to the present invention.
Fig. 2 shows a schematic view of an air duct in a method of manufacturing a soft pack battery according to an embodiment of the present invention.
Fig. 3 is a schematic view of an air duct and an aluminum plastic film airbag after edge encapsulation in a manufacturing method of a soft package battery according to an embodiment of the invention.
Fig. 4 shows a schematic view of a sealing plug in a method of manufacturing a soft pack battery according to an embodiment of the present invention.
Fig. 5 shows a schematic view of the cooperation of the sealing plug with the vacuum connection end of the air duct in the manufacturing method of the soft pack battery according to one embodiment of the present invention.
Fig. 6 is a schematic view showing a vacuum connection end of an air duct interfacing with a vacuum system in a method of manufacturing a pouch cell according to an embodiment of the present invention.
Reference numerals illustrate:
1. an air duct; 101. a base pipe; 102. a needle bar; 103. an annular groove; 2. a soft pack battery; 201. an air bag; 3. a sealing plug; 301. an annular protrusion; 4. negative pressure air tap.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows a step diagram of a method of manufacturing a soft pack battery according to the present invention.
As shown in fig. 1, a method of manufacturing a soft pack battery according to the present invention includes:
providing an air duct 1, wherein one end of the air duct 1 is a vacuum connection end, and the other end of the air duct 1 is a free end;
inserting the free end of the air duct 1 into the aluminum-plastic film air bag 201 of the soft package battery 2 with the injected liquid, and arranging the vacuum connection end outside the aluminum-plastic film air bag 201;
sealing treatment is carried out between the outer wall of the air duct 1 and the edge of the aluminum plastic film air bag 201;
providing a sealing plug 3, wherein one end of the sealing plug 3 can be in sealing connection with the vacuum connection of the air duct 1;
sealing the vacuum connection end of the air duct 1 through the sealing plug 3, and performing a soaking and standing procedure on the soft package battery 2;
after the soaking and standing process is completed, removing the sealing plug 3 and connecting the vacuum connecting end of the air duct 1 with a vacuum system;
carrying out vacuumizing treatment on the soft package battery 2 through a vacuum system until a set time, and carrying out a formation procedure on the soft package battery 2;
after the formation process is completed, the vacuum system is removed and the vacuum connection of the airway 1 is sealed by means of the sealing plug 3.
Specifically, after the soft package battery 2 finishes the liquid injection, the air duct 1 is arranged in the aluminum plastic film air bag 201 reserved in the soft package battery 2 and the air duct 1 is sealed at the edge of the aluminum plastic film, so that an air path communicated with the inside and the outside of the air bag 201 is formed, then the vacuum connection end of the air path is sealed by using the sealing plug 3 to finish the battery soaking and standing process, then the rubber plug is removed to connect the vacuum connection end of the air duct 1 with a vacuum system for negative pressure formation, the air duct 1 is sealed by the sealing plug 3 after the negative pressure formation is finished, the vacuum degree inside the soft package battery 2 is ensured so as to finish the subsequent process, the size of the air bag 201 reserved in the soft package battery 2 can be effectively reduced by the method of combining the air duct 1 with the sealing plug 3, the use amount of the aluminum plastic film is reduced, and the material cost is reduced.
Fig. 2 to 6 show a schematic view of an air duct, a schematic view of an air duct and an edge of an aluminum plastic film air bag after being encapsulated, a schematic view of a sealing plug matched with a vacuum connection end of the air duct, and a schematic view of a butt joint of the vacuum connection end of the air duct and a vacuum system in a manufacturing method of a soft package battery according to an embodiment of the present invention, and the manufacturing method of the soft package battery will be described in detail with reference to fig. 2 to 6.
Referring to fig. 2, an air duct 1 is provided, one end of the air duct 1 is a vacuum connection end, the other end of the air duct 1 is a free end, the air duct 1 comprises a base pipe 101 and a needle bar 102, one end of the base pipe 101 is a vacuum connection end, one end of the needle bar 102 is a free end, the other end of the base pipe 101 is connected with the other end of the needle bar 102, and the edge of the free end is provided with a chamfer. The base pipe 101 is internally provided with a first channel, the needle rod is internally provided with a second channel, and the first channel is communicated with the second channel. In this embodiment, the air duct 1 is made of polypropylene (PP), and the base tube 101 and the needle bar 102 are integrally formed.
Referring to fig. 3, after the injection is completed, only the edge of the air bag 201 of the plastic-aluminum film of the whole soft package battery 2 is provided with a smaller opening for the injection, the free end of the needle rod 102 of the air duct 1 is inserted into the air bag 201 of the plastic-aluminum film from the opening, and the vacuum connection end is arranged outside the air bag 201 of the plastic-aluminum film; because the plastic-aluminum membrane is multilayer structure and the innermost layer is polypropylene (PP) layer, can adopt the head of top side seal machine to seal in a heat sealing mode or adopt ultrasonic packaging machine encapsulation mode, seal air duct 1 at the plastic-aluminum membrane edge of annotating the liquid open-ended, make the edge of plastic-aluminum membrane seal with the outer wall of air duct 1 between to guarantee that the air route exposes the plastic-aluminum membrane edge a certain length. It should be noted that it is necessary to ensure that the needle shaft 102 of the airway tube 1 is not deformed during the packaging process, i.e. that the second passage in the needle shaft 102 is clear.
Referring to fig. 4, a sealing plug 3 is provided, one end of the sealing plug 3 being capable of being sealingly connected to the vacuum connection of the airway tube 1. In this embodiment, the inner wall of the first channel in the base pipe 101 of the gas-guide tube 1 is provided with an annular groove 103, the outer wall of one end of the sealing plug 3 is provided with an annular protrusion 301 matching with the annular groove 103, and the diameter of the first channel is smaller than the diameter of the end of the sealing plug 3 with the annular protrusion 301. The sealing plug 3 is made of rubber, and one end of the sealing plug 3 with the annular bulge 301 is provided with a conical guide head, so that the guiding function can be realized when the air duct 1 is inserted. In other embodiments of the present invention, other forms or other materials of the sealing plug 3 may be used, and will not be described here.
Referring to fig. 5, the vacuum connection end of the airway tube 1 is sealed by a sealing plug 3; i.e. one end of the sealing plug 3 is inserted into the orifice of the vacuum connection end, and the annular protrusion 301 of the sealing plug 3 is matched with the annular groove 103 of the inner wall of the first channel, so as to realize the sealing of the air duct 1.
Afterwards, the electric core of the soft package battery 2 is subjected to standing infiltration, after the air duct 1 is sealed, the inside of the soft package battery 2 can be completely isolated from the external environment, and a good airtight environment is provided for the standing infiltration. According to different processes, the standing and soaking process is divided into high-temperature standing and normal-temperature standing, and the standing can be selected by a person skilled in the art according to actual requirements, so that the purpose of the standing is to fully soak the electrode plate of the battery with the injected electrolyte.
Referring to fig. 6, after the soaking and standing process is completed, the soft package battery 2 is transferred to a specific station to remove the sealing plug 3 (pull out the rubber plug), then the soft package battery 2 is transferred to a charge and discharge test cabinet (formation cabinet), the electrode of the battery is connected with a power supply provided by the charge and discharge test cabinet, and meanwhile, the vacuum connection end of the air duct 1 is in butt joint with the negative pressure air tap 4 of the vacuum system. The bottom of vacuum system's negative pressure air cock 4 is equipped with the elastic tube, makes elastic tube and the vacuum link butt of air duct 1 through pushing down negative pressure air cock 4, and the elastic tube can be with vacuum link zonulae occludens owing to elasticity, and then can carry out the evacuation operation to soft packet of battery 2.
And (3) vacuumizing the soft package battery 2 for a certain time, and then performing charge and discharge operation, namely performing a formation process on the soft package battery 2. Specifically, the formation is the first charge of the battery cell in the pouch cell 2, but the highest voltage when the pouch cell 2 is used is not charged, and the charged current is very small. The purpose of formation is to form a stable SEI film (passivation film layer of solid electrolyte nature) on the electrode surface, which corresponds to the process of "activating" the cell. In this process, a certain amount of gas is generated in the soft package battery 2 and is discharged into the reserved aluminum plastic film air bag 201, and when a certain amount of gas is generated, the generated gas can be sucked out through the air duct 1 by using a vacuum system.
After the formation process is completed, the vacuum system is removed, the soft package battery 2 is turned to a specific station, the vacuum connection end of the air duct 1 is sealed through the sealing plug 3, and the air tightness in the aluminum plastic film is ensured so as to facilitate the subsequent process.
According to the embodiment of the invention, the standing infiltration and negative pressure formation working procedures of the soft-packaged battery 2 are completed by combining the air duct 1 with the sealing plug 3, so that the size of the reserved air bag 201 of the soft-packaged battery 2 can be effectively reduced, the use amount of an aluminum plastic film is reduced, and the material cost is reduced.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (4)
1. A method of manufacturing a flexible battery, comprising:
providing an air duct, wherein one end of the air duct is a vacuum connection end, and the other end of the air duct is a free end;
inserting the free end of the air duct into an aluminum-plastic film air bag of the soft package battery with the injected liquid, and arranging the vacuum connecting end outside the aluminum-plastic film air bag;
sealing the outer wall of the air duct and the edge of the aluminum plastic film air bag;
providing a sealing plug, wherein one end of the sealing plug can be in sealing connection with the vacuum connection of the air duct;
sealing the vacuum connection end of the air duct through the sealing plug, and performing a soaking and standing procedure on the soft package battery;
after the soaking and standing process is finished, removing the sealing plug and connecting the vacuum connecting end of the air duct with a vacuum system;
vacuumizing the soft package battery through the vacuum system until the time is up to a preset time, and performing a formation procedure on the soft package battery;
after the formation process is completed, removing the vacuum system and sealing the vacuum connection end of the air duct through the sealing plug;
the air duct comprises a base pipe and a needle rod, one end of the base pipe is the vacuum connecting end, one end of the needle rod is the free end, the other end of the base pipe is connected with the other end of the needle rod, and the edge of the free end is provided with a chamfer;
a first channel is arranged in the base pipe, a second channel is arranged in the needle bar, the first channel is communicated with the second channel, and the diameter of the first channel is smaller than that of one end of the sealing plug;
an annular groove is formed in the inner wall of the first channel, and an annular protrusion matched with the annular groove is formed in the outer wall of one end of the sealing plug;
sealing the vacuum connection end of the airway by the sealing plug comprises:
inserting the one end of the sealing plug into the orifice of the vacuum connection end, and matching the annular protrusion of the sealing plug with the annular groove of the inner wall of the first channel;
the air duct is made of polypropylene, and the base pipe and the needle bar are integrally formed;
the sealing plug is made of rubber, and one end of the sealing plug is provided with a conical guide head.
2. The method of manufacturing a pouch cell as defined in claim 1, further comprising, after removing the sealing plug and before connecting the vacuum connection end of the air duct with a vacuum system:
and moving the soft package battery to a charge and discharge test cabinet, and connecting an electrode of the soft package battery with a power supply provided by the charge and discharge test cabinet.
3. The method of manufacturing a flexible battery according to claim 2, wherein the step of forming the flexible battery includes:
and carrying out charge and discharge operation on the soft package battery through the charge and discharge test cabinet.
4. The method of manufacturing a flexible battery according to claim 1, wherein sealing between the outer wall of the air duct and the edge of the plastic-aluminum film air bag comprises:
and sealing the edges of the aluminum-plastic film air bags and the edges of the outer walls of the air guide pipes and the aluminum-plastic film air bags in a heat sealing or ultrasonic wave sealing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010075475.2A CN111261949B (en) | 2020-01-22 | 2020-01-22 | Method for manufacturing soft package battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010075475.2A CN111261949B (en) | 2020-01-22 | 2020-01-22 | Method for manufacturing soft package battery |
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| CN111261949A CN111261949A (en) | 2020-06-09 |
| CN111261949B true CN111261949B (en) | 2023-08-18 |
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| CN202010075475.2A Active CN111261949B (en) | 2020-01-22 | 2020-01-22 | Method for manufacturing soft package battery |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111883847B (en) * | 2020-07-09 | 2022-08-09 | 合肥国轩高科动力能源有限公司 | Packaging method and packaging structure for reserved air guide port of soft package battery |
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| CN102569872A (en) * | 2010-12-15 | 2012-07-11 | 海洋王照明科技股份有限公司 | Lithium ion battery and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102257850B1 (en) * | 2014-07-18 | 2021-05-28 | 에스케이이노베이션 주식회사 | Pouch type lithium secondary battery having tubular passage structure |
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2020
- 2020-01-22 CN CN202010075475.2A patent/CN111261949B/en active Active
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|---|---|---|---|---|
| CN101533927A (en) * | 2009-03-17 | 2009-09-16 | 林道勇 | Method for manufacturing lithium ion battery |
| WO2010105565A1 (en) * | 2009-03-17 | 2010-09-23 | 山东润峰集团新能源科技有限公司 | Method for manufacturing lithium ion battery and package bag of lithium ion battery |
| CN102569872A (en) * | 2010-12-15 | 2012-07-11 | 海洋王照明科技股份有限公司 | Lithium ion battery and manufacturing method thereof |
| CN104600369A (en) * | 2015-01-12 | 2015-05-06 | 山东神工海特电子科技有限公司 | Liquid injecting, sealing and forming method of soft packaging lithium-ion battery |
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