CN111276764A - Manufacturing method of soft package battery - Google Patents
Manufacturing method of soft package battery Download PDFInfo
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- CN111276764A CN111276764A CN202010075609.0A CN202010075609A CN111276764A CN 111276764 A CN111276764 A CN 111276764A CN 202010075609 A CN202010075609 A CN 202010075609A CN 111276764 A CN111276764 A CN 111276764A
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- soft package
- aluminum
- package battery
- plastic film
- air
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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
- H01M10/42—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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
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 connecting end, and the other end of the air duct is a free end; inserting the free end of the air duct into the aluminum-plastic film air bag of the soft package battery after liquid injection, and placing 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 connecting end of the air duct through the sealing plug; carrying out an infiltration standing process on 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; carrying out a formation process on the soft package battery; and removing the vacuum system and carrying out heat sealing treatment on the connecting part of the air duct and the edge of the aluminum-plastic film to seal the air passage. The size of the reserved air bag of the soft package battery can be effectively reduced, the use 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 a new energy automobile and is rapidly developed in recent years, wherein the soft package battery has the characteristics of high safety performance, light weight, high energy density, small internal resistance, long service life and the like, is widely applied to commercial vehicles and passenger vehicles, and occupies a large proportion in the lithium ion battery; formation is an important process in the manufacturing process of the soft package battery, the gas generated is mainly discharged into the reserved air bag by applying larger pressure in the current formation process of the soft package battery, the air bag is reserved greatly, the waste of the aluminum plastic film is serious, the requirements on a pressurization system and a clamp of a pressure formation device are higher, and the cost is serious.
Therefore, it is necessary to provide a method for manufacturing a pouch battery that can reduce the size of a plastic film bladder and reduce the cost of the 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 pouch battery, comprising:
providing an air duct, wherein one end of the air duct is a vacuum connecting end, the other end of the air duct is a free end, and an air path channel is arranged in the air duct;
inserting the free end of the air guide tube into an aluminum-plastic film air bag of the soft package battery after liquid injection, and placing 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 guide pipe;
sealing the vacuum connecting end of the air guide tube through the sealing plug, and performing a soaking and standing process on the soft package battery;
after the infiltration standing procedure is completed, removing the sealing plug and connecting the vacuum connecting end of the air guide tube with a vacuum system;
vacuumizing the soft package battery through the vacuum system;
after the vacuumizing treatment is finished, carrying out a formation procedure on the soft package battery;
and after the formation process is finished, removing the vacuum system, and performing heat sealing treatment on the connecting part of the air guide tube and the edge of the aluminum-plastic film to deform the connecting part of the air guide tube and the edge of the aluminum-plastic film so as to seal the air passage. Optionally, after removing the sealing plug and before connecting the vacuum connection end of the airway tube with a vacuum system, further comprising:
and moving the soft package battery to a charge and discharge test cabinet, and connecting the electrode of the soft package battery with a power supply provided by the charge and discharge test cabinet.
Optionally, the step of forming the pouch battery includes:
and the soft package battery is subjected to charge and discharge operation through the charge and discharge test cabinet.
Optionally, the sealing between the outer wall of the airway tube and the edge of the aluminum-plastic film balloon comprises:
and sealing the edges of the aluminum-plastic film air bag and the outer wall of the air duct with the edges of the aluminum-plastic air bag by adopting a heat sealing mode or an ultrasonic wave packaging mode.
Optionally, the heat-sealing treatment of the connecting part of the air duct and the edge of the aluminum-plastic film includes: and heating the connecting part of the air duct and the edge of the aluminum-plastic film by adopting a thermal packaging mode or an ultrasonic packaging mode to ensure that the connecting part of the air duct and the edge of the aluminum-plastic film generates thermal deformation, so that the air path channel in the air duct is closed.
Optionally, the air duct includes parent tube and needle bar, the one end of parent tube is the vacuum connection end, the one end of needle bar is the free end, the other end of parent tube with the other end of needle bar is connected, the edge of free end is equipped with the chamfer.
Optionally, a first passage is arranged in the base tube, a second passage is arranged in the needle tube, the first passage is communicated with the second passage, and the diameter of the first passage is smaller than that of the one end of the sealing plug.
Optionally, the inner wall of the first passage is provided with an annular groove, and the outer wall of the one end of the sealing plug is provided with an annular protrusion which is matched with the annular groove.
Optionally, sealing the vacuum connection end of the airway tube by the sealing plug comprises:
inserting said one end of said sealing plug into said orifice of said vacuum connection end and engaging said annular projection of said sealing plug with said annular recess of said first passageway inner wall.
Optionally, the material of the air duct is 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.
The invention has the beneficial effects that:
in the negative pressure formation process of the soft package battery, after the liquid injection of the soft package battery is completed, the air guide pipe is arranged in an aluminum plastic film air bag reserved in the soft package battery, the air guide pipe is sealed at the edge of the aluminum plastic film to form an air path communicating the inside and the outside of the air bag, then the vacuum connecting end of the air path is sealed by using a sealing plug to complete the battery soaking and standing process, then the rubber plug is removed to connect the vacuum connecting end of the air guide pipe with a vacuum system for negative pressure formation, after the negative pressure formation is completed, the heat sealing treatment is carried out on the connecting part of the air guide pipe and the edge of the aluminum plastic film, the connecting part of the air guide pipe and the edge of the aluminum plastic film is deformed to seal the air path channel, the vacuum degree in the soft package battery is ensured so as to complete the subsequent process, and the gas generated by the battery can be discharged in time in, effectively reduce laminate polymer battery and reserve the size of gasbag, reduce the use amount of plastic-aluminum membrane, reduce material cost, can effectively reduce the manufacturing cost that laminate polymer battery negative pressure becomes.
The apparatus 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 above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a step diagram of a manufacturing method of a pouch battery according to the present invention.
Fig. 2 shows a schematic view of a gas-guide tube in a manufacturing method of a soft package battery according to an embodiment of the invention.
Fig. 3 shows a schematic diagram of the gas-guide tube and the edge of the aluminum-plastic film balloon after being packaged in the manufacturing method of the soft package battery according to one embodiment of the invention.
Fig. 4 shows a schematic view of a sealing plug in a manufacturing method of a soft package battery according to an embodiment of the invention.
Fig. 5 shows a schematic diagram of the sealing plug and the vacuum connection end of the air duct in the manufacturing method of the soft package battery according to one embodiment of the invention.
Fig. 6 shows a schematic diagram of the vacuum connection end of the gas guide tube in the manufacturing method of the soft package battery and the vacuum system in butt joint according to one embodiment of the invention.
Fig. 7 shows a schematic form of a manufacturing method of a pouch battery after heat-sealing treatment of the joint of the air duct and the edge of the aluminum plastic film according to an embodiment of the invention.
Description of reference numerals:
1. an air duct; 101. a base pipe; 102. a needle bar; 103. an annular groove; 104. the air duct is connected with the edge of the aluminum-plastic film; 2. a pouch cell; 201. an air bag; 3. a sealing plug; 301. an annular projection; 4. and a negative pressure air nozzle.
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 shown 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 manufacturing method of a pouch battery according to the present invention.
As shown in fig. 1, a manufacturing method of a pouch battery according to the present invention includes:
providing an air duct 1, wherein one end of the air duct 1 is a vacuum connecting end, the other end of the air duct 1 is a free end, and an air path channel is arranged in the air duct 1;
inserting the free end of the air duct 1 into the aluminum-plastic film air bag 201 of the soft package battery 2 after liquid injection, and placing the vacuum connecting end outside the aluminum-plastic film air bag 201;
sealing 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 connected with the vacuum connection and sealing of the air duct 1;
sealing the vacuum connecting end of the gas guide tube 1 through a sealing plug 3, and performing a soaking and standing process on the soft package battery 2;
after the soaking and standing procedure is completed, removing the sealing plug 3 and connecting the vacuum connecting end of the air duct 1 with a vacuum system;
after the vacuum system vacuumizes the soft package battery 2 for a set time, the soft package battery 2 is subjected to a formation process;
after the formation process is completed, the vacuum system is removed, and the connection part 104 between the air duct and the edge of the aluminum-plastic film is subjected to heat sealing treatment, so that the connection part between the air duct and the edge of the aluminum-plastic film is deformed, and the air passage channel is closed. Specifically, after the liquid injection of the soft package battery 2 is completed, the air duct 1 is arranged in the aluminum-plastic film air bag 201 reserved in the soft package battery 2, the air duct 1 is sealed at the edge of the aluminum-plastic film, an air path communicating the inside and the outside of the air bag 201 is formed, then the vacuum connecting end of the air duct 1 is sealed by using a sealing plug 3 to complete the battery soaking and standing process, then the rubber plug is removed, the vacuum connecting end of the air duct 1 is connected with a vacuum system to perform negative pressure formation, the connecting part 104 between the air duct and the edge of the aluminum-plastic film is subjected to heat sealing treatment after the negative pressure formation is completed, the connecting part 104 between the air duct and the edge of the aluminum-plastic film is deformed to seal the air path channel in the air duct 1, the vacuum degree inside the soft package battery 2 is ensured so as to complete the subsequent processes such as air bag cutting and the edge, and the like, the gas generated when the soft package battery 2 is subjected to negative pressure, the size of the reserved air bag 201 of the soft package battery 2 is effectively reduced, the usage amount of the aluminum-plastic film is reduced, and the material cost is reduced.
Fig. 2 to 7 show a schematic diagram of a gas-guide tube, a schematic diagram of the gas-guide tube after being packaged with an edge of an aluminum plastic film balloon, a schematic diagram of a sealing plug, a schematic diagram of the sealing plug matching with a vacuum connection end of the gas-guide tube, a schematic diagram of the vacuum connection end of the gas-guide tube abutting against a vacuum system, and a schematic diagram of a shape of the gas-guide tube after being heat-sealed with a portion where the gas-guide tube abuts against the edge of the aluminum plastic film in a manufacturing method of a pouch battery according to an embodiment of the invention, which will be described in detail below with reference to fig..
Referring to fig. 2, an airway tube 1 is provided, one end of the airway tube 1 is a vacuum connection end, the other end of the airway tube 1 is a free end, the airway tube 1 comprises a base tube 101 and a needle rod 102, one end of the base tube 101 is the vacuum connection end, one end of the needle rod 102 is the free end, the other end of the base tube 101 is connected with the other end of the needle rod 102, and the edge of the free end is provided with a chamfer. A first channel is arranged in the base tube 101, a second channel is arranged in the needle tube, and the first channel is communicated with the second channel. In this embodiment, the airway tube 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 liquid injection is completed, only the edge of the air bag 201 of the aluminum plastic film of the whole soft package battery 2 is left with a smaller opening for liquid injection, the free end of the needle rod 102 of the air duct 1 is inserted into the aluminum plastic film air bag 201 from the opening, and the vacuum connecting end is placed outside the aluminum plastic film air bag 201; because the plastic-aluminum membrane is multilayer structure and the inlayer is polypropylene (PP) layer, can adopt the head of top side sealing machine with heat-seal mode or adopt ultrasonic packaging machine encapsulation mode, encapsulate air duct 1 at annotating liquid open-ended plastic-aluminum membrane edge, make between the edge of plastic-aluminum membrane and the outer wall of air duct 1 sealed to guarantee that the gas circuit exposes plastic-aluminum membrane edge certain length. It should be noted that it is necessary to ensure that the shaft 102 of the airway tube 1 does not deform during the encapsulation process, i.e. to ensure that the second passageway in the shaft 102 is clear.
Referring to fig. 4, a sealing plug 3 is provided, one end of the sealing plug 3 being capable of sealing connection with the vacuum connection of the airway tube 1. In this embodiment, the inner wall of the first passage in the base tube 101 of the airway 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 which is matched with the annular groove 103, and the diameter of the first passage is smaller than the diameter of one 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 protrusion 301 is provided with a conical guide head which can play a role in guiding when the air guide tube 1 is inserted. In other embodiments of the present invention, other forms or materials of the sealing plug 3 may be adopted, and are not described herein.
Referring to fig. 5, the vacuum connection end of the airway tube 1 is sealed by a sealing plug 3; namely, one end of the sealing plug 3 is inserted into the pipe orifice of the vacuum connecting end, and the annular bulge 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, stew and soak to laminate polymer battery 2's electric core, to air duct 1 sealed back, laminate polymer battery 2 is inside can be completely isolated with external environment, soaks for stewing and provides good airtight environment. According to different processes, the standing and infiltrating process comprises high-temperature standing and normal-temperature standing, and a person skilled in the art can select the standing process according to actual requirements, wherein the purpose of standing is to enable the injected electrolyte to infiltrate pole pieces of the battery fully.
Referring to fig. 6, after finishing the process of standing by soaking, transferring the laminate polymer battery 2 to a specific station to remove the sealing plug 3 (pull out the rubber plug), then transferring the laminate polymer battery 2 to a charge and discharge test cabinet (make into a cabinet), connecting the electrode of the battery with the power supply provided by the charge and discharge test cabinet, and simultaneously butting the vacuum connecting end of the air duct 1 with the negative pressure air nozzle 4 of the vacuum system. Vacuum system's negative pressure air cock 4's bottom is equipped with the elastic tube, makes the vacuum link butt of elastic tube and air duct 1 through pushing down negative pressure air cock 4, and the elastic tube can be connected closely with the vacuum link owing to elasticity, and then can carry out the evacuation operation to laminate polymer battery 2.
And (3) carrying out charging and discharging operation after vacuumizing the soft package battery 2 for a certain time, namely carrying out a formation process on the soft package battery 2. Specifically, formation is the first charging of the battery core in the pouch battery 2, but the highest voltage when the pouch battery 2 is used is not charged, and the charging current is also very small. The purpose of the formation is to form a stable SEI film (passivation film layer of solid electrolyte property) on the surface of the electrode, which corresponds to the process of "activating" the cell. In the process, a certain amount of gas generated in the soft package battery 2 is discharged into the reserved aluminum-plastic film air bag 201, and after the certain amount of gas is generated, the generated gas can be sucked out through the gas guide tube 1 by using a vacuum system.
After the formation process is completed, the vacuum system is removed, the pouch battery 2 is transferred to a specific station, and at this time, the inside of the battery is under a vacuum condition, and the heat sealing treatment is performed on the connecting part 104 between the air duct and the edge of the aluminum-plastic film (i.e., the connecting part between the needle bar and the edge of the aluminum-plastic film), so that the connecting part 104 between the air duct and the edge of the aluminum-plastic film is deformed, and the air path channel is closed. The air tightness in the aluminum plastic film of the battery is effectively ensured so as to carry out subsequent procedures. In the specific implementation process, the part 104 of the air duct connected with the edge of the aluminum-plastic film is heated, dissolved and extruded at the same time, and then the air duct can be sealed, and the shape of the sealed part 104 of the air duct connected with the edge of the aluminum-plastic film is shown in fig. 7.
According to the embodiment of the invention, the standing infiltration and negative pressure formation processes of the soft package battery 2 are completed through the air guide tube 1 and the sealing plug 3, so that gas generated by negative pressure formation can be discharged in time, the size of the reserved air bag 201 of the soft package battery 2 is effectively reduced, the usage amount of an aluminum-plastic film is reduced, and the material cost is reduced.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not 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 described embodiments.
Claims (10)
1. A manufacturing method of a soft package battery is characterized by comprising the following steps:
providing an air duct, wherein one end of the air duct is a vacuum connecting end, the other end of the air duct is a free end, and an air path channel is arranged in the air duct;
inserting the free end of the air guide tube into an aluminum-plastic film air bag of the soft package battery after liquid injection, and placing 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 guide pipe;
sealing the vacuum connecting end of the air guide tube through the sealing plug, and performing a soaking and standing process on the soft package battery;
after the infiltration standing procedure is completed, removing the sealing plug and connecting the vacuum connecting end of the air guide tube with a vacuum system;
vacuumizing the soft package battery through the vacuum system for a preset time, and then carrying out a formation process on the soft package battery;
and after the formation process is finished, removing the vacuum system, and performing heat sealing treatment on the connecting part of the air guide tube and the edge of the aluminum-plastic film to deform the connecting part of the air guide tube and the edge of the aluminum-plastic film so as to seal the air passage.
2. The manufacturing method of the pouch battery according to claim 1, further comprising, after removing the sealing plug and before connecting the vacuum connection end of the gas-guide tube with a vacuum system: and moving the soft package battery to a charge and discharge test cabinet, and connecting the electrode of the soft package battery with a power supply provided by the charge and discharge test cabinet.
3. The method for manufacturing the pouch battery according to claim 2, wherein the step of forming the pouch battery includes:
and the soft package battery is subjected to charge and discharge operation through the charge and discharge test cabinet.
4. The manufacturing method of the soft package battery according to claim 1, wherein the sealing process between the outer wall of the gas guide tube and the edge of the aluminum-plastic film balloon comprises:
and sealing the edges of the aluminum-plastic film air bag and the outer wall of the air duct with the edges of the aluminum-plastic air bag by adopting a heat sealing mode or an ultrasonic wave packaging mode.
5. The manufacturing method of the soft package battery according to claim 1, wherein the heat sealing treatment of the joint part of the air guide tube and the edge of the aluminum-plastic film comprises the following steps:
and heating the connecting part of the air duct and the edge of the aluminum-plastic film by adopting a thermal packaging mode or an ultrasonic packaging mode to ensure that the connecting part of the air duct and the edge of the aluminum-plastic film generates thermal deformation, so that the air path channel in the air duct is closed.
6. The manufacturing method of the soft package battery according to claim 1, wherein the air guide tube comprises a base tube and a needle rod, one end of the base tube is the vacuum connecting end, one end of the needle rod is the free end, the other end of the base tube is connected with the other end of the needle rod, and the edge of the free end is provided with a chamfer.
7. The manufacturing method of the soft package battery according to claim 6, wherein a first passage is arranged in the base tube, a second passage is arranged in the needle tube, the first passage is communicated with the second passage, and the diameter of the first passage is smaller than that of the one end of the sealing plug.
8. The manufacturing method of the soft package battery according to claim 7, wherein the inner wall of the first passage is provided with an annular groove, and the outer wall of the one end of the sealing plug is provided with an annular protrusion which is matched with the annular groove.
9. The manufacturing method of the pouch battery according to claim 8, wherein the sealing the vacuum connection end of the gas guide tube by the sealing plug comprises:
inserting said one end of said sealing plug into said orifice of said vacuum connection end and engaging said annular projection of said sealing plug with said annular recess of said first passageway inner wall.
10. The manufacturing method of the soft package battery according to claim 6, wherein the material of the gas-guide tube is polypropylene, and the base tube 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.
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| CN202010075609.0A CN111276764A (en) | 2020-01-22 | 2020-01-22 | Manufacturing method of soft package battery |
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| CN202010075609.0A CN111276764A (en) | 2020-01-22 | 2020-01-22 | Manufacturing method of soft package battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883847A (en) * | 2020-07-09 | 2020-11-03 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111883847A (en) * | 2020-07-09 | 2020-11-03 | 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 |
| 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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