CN113381119A - Battery manufacturing method and battery - Google Patents
Battery manufacturing method and battery Download PDFInfo
- Publication number
- CN113381119A CN113381119A CN202110648669.1A CN202110648669A CN113381119A CN 113381119 A CN113381119 A CN 113381119A CN 202110648669 A CN202110648669 A CN 202110648669A CN 113381119 A CN113381119 A CN 113381119A
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- cylinder
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000002985 plastic film Substances 0.000 claims abstract description 18
- 229920006255 plastic film Polymers 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 18
- 239000003792 electrolyte Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 21
- 239000007924 injection Substances 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 8
- 238000003860 storage Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- 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
-
- 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
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention relates to a battery manufacturing method and a battery, wherein the method comprises the following steps: step S10, providing a battery shell, and forming a through hole on the side wall of the battery shell; step S20, installing the battery core in the battery shell; step S30, providing a cylinder made of aluminum plastic film, wherein the cylinder is provided with a first end and a second end which are open, the first end of the cylinder is connected with the battery shell, and the through hole is communicated with the inside of the cylinder; step S40, injecting liquid, and plugging the second end of the cylinder; step S50, formation; step S60, discharging gas generated by the container formation in the cylinder; and step S70, attaching and fixing the cylinder on the side wall of the battery shell, sealing the through hole, and forming an explosion-proof film at the part for sealing the through hole. The method utilizes the cylinder to collect gas so as to complete liquid injection at one time, and uses the through hole as an explosion-proof hole, so that the explosion-proof hole has high design flexibility, and has the characteristics of high liquid injection efficiency and good explosion-proof effect.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery manufacturing method and a battery.
Background
The market demand of aluminum-shell lithium batteries is increasing day by day, so how to improve the production efficiency is a problem that battery manufacturers need to solve urgently. Current aluminum-clad lithium cell includes the aluminium system shell, and the aluminium system shell has the one end open-ended chamber that holds, and the open end of aluminium system shell is provided with the top cap to hold the chamber through the top cap shutoff. In the battery manufacturing process, the battery core is installed in the containing cavity, and electrolyte is injected into the containing cavity through the liquid injection hole in the top cover. The electrolyte and the battery core are fully soaked, and the process is a formation process. Because can produce gas in the battery when becoming, consequently, adopt twice mode of annotating liquid to carry out the notes liquid operation usually, wait to carry out the second time again and annotate liquid after the gas in the battery discharges to guarantee to annotate the liquid quality. Meanwhile, the general designed size of the liquid injection hole is small, so that the liquid injection time is long. Still be provided with the explosion-proof hole on the overhead gage, when producing gas in the battery use, the accessible explosion-proof hole carries out the pressure release to guarantee safe in utilizationly. In actual use, the explosion-proof hole is influenced by position and size factors, and the pressure relief effect is poor.
Disclosure of Invention
The invention aims to provide a battery manufacturing method which is high in liquid injection efficiency and good in explosion-proof effect.
The invention aims to provide a battery, which integrates a liquid injection hole and an explosion-proof hole, and has high liquid injection efficiency and good explosion-proof effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the provided battery manufacturing method comprises the following steps:
step S10, providing a battery shell, wherein a through hole is formed in the side wall of the battery shell;
step S20, installing the battery core in the battery shell;
step S30, providing a cylinder made of aluminum plastic film, wherein the cylinder is provided with a first end and a second end which are open, the first end of the cylinder is connected with the battery shell, and the through hole is communicated with the inside of the cylinder;
step S40, injecting liquid, and plugging the second end of the cylinder;
step S50, formation;
step S60, discharging gas generated by the formation in the cylinder;
and step S70, the through hole is sealed by the cylinder, and the part of the cylinder for sealing the through hole forms an explosion-proof membrane.
Further, in step S30, a flange is disposed at the first end of the cylinder, and a free end of the flange extends in a direction away from the center line of the cylinder to weld or bond the flange and the battery case.
Further, electrolyte is injected into the battery shell through the second end of the cylinder, and the second end of the cylinder is sealed.
Further, during sealing, the cylinder body is extruded or vacuumized, so that the inner space of the cylinder body is contracted to discharge gas in the cylinder body, and the second end of the cylinder body is sealed in a hot pressing or bonding mode.
Further, in step S50, the side of the battery case where the cylinder is installed is placed upward, so that the gas generated in the formation process enters the inside of the cylinder through the through hole.
Further, in step S60, an air extracting device is provided, and the air inside the cylinder is extracted by the air extracting device.
Further, in step S70, a part of the cylinder is cut, and the remaining cylinder is sealed on the through hole to form the explosion-proof membrane.
Further, the remaining cylinder is shaped.
Further, provide a flaky plastic-aluminum membrane, fold the plastic-aluminum membrane and will the relative both ends of plastic-aluminum membrane link together in order to form the barrel, the barrel is the cuboid structure, one of them side of barrel forms the rupture membrane.
The battery is manufactured by the manufacturing method and comprises a battery shell and an electric core arranged in the battery shell, a through hole is formed in the side wall of the battery shell, and an explosion-proof film made of an aluminum-plastic film material is covered on the through hole.
Compared with the prior art, the invention has the beneficial effects that:
according to the battery manufacturing method and the battery, the through hole is formed in the side wall of the battery shell, the barrel made of the aluminum-plastic film material is installed at the through hole, the barrel is provided with the air chamber capable of containing air, and the air chamber is communicated with the interior of the battery shell. The gas generated in the accommodating cavity can enter the gas chamber through the through hole and the first opening in sequence. The second opening of the cylinder is closed during formation, so that the gas is collected in the gas chamber. This mode is favorable to reducing the number of times of annotating the liquid to and the convenience is to gaseous collection, and then improves and annotates liquid efficiency. Meanwhile, after the formation is finished, the cylinder body is covered on the through hole to be used as an explosion-proof membrane. The through-hole uses as explosion-proof hole promptly, and the position and the size that set up of explosion-proof hole can set up in a flexible way to have better explosion-proof effect and adapt to various use scenes.
Drawings
Fig. 1 is a schematic view of a battery case of an embodiment after a can is mounted.
Fig. 2 is a schematic view of the battery case of the embodiment before the cartridge is mounted.
Fig. 3 is a schematic diagram of a battery of an embodiment.
Fig. 4 is a cross-sectional view of the battery case and can mounting location.
Fig. 5 is a schematic view of a cartridge of an embodiment.
In the figure:
1. a battery case; 11. a through hole; 12. an accommodating chamber; 2. a barrel; 20. flanging; 21. a second opening; 22. an explosion-proof membrane; 23. an air chamber.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention provides a method for manufacturing a battery, which is used for manufacturing an aluminum-casing battery. The aluminum-shell battery comprises a battery shell 1, wherein a containing cavity 12 for containing an electric core and electrolyte is formed inside the battery shell 1, the battery shell 1 comprises a shell body and a top cover arranged at one end of the shell body, and the containing cavity 12 is formed between the shell body and the top cover. The top cover is provided with a positive electrode tab and a negative electrode tab which are used for being connected with external equipment, and the positive electrode tab and the negative electrode tab are electrically connected with the battery cell in the accommodating cavity 12. The manufacturing method of the battery comprises the following steps:
step S10, providing a battery shell 1, and forming a through hole 11 on the side wall of the battery shell 1;
step S20, installing the battery core in the battery shell 1;
step S30, providing a cylinder 2 made of aluminum plastic film, the cylinder 2 having a first end and a second end with openings, connecting the first end of the cylinder 2 with the battery case 1, and communicating the through hole 11 with the inside of the cylinder 2;
step S40, injecting liquid, and plugging the second end of the cylinder 2;
step S50, formation;
step S60, discharging gas generated by the formation in the cylinder 2;
in step S70, the through hole 11 is closed by the tube body 2, and the explosion-proof film 22 is formed at the portion of the tube body 2 closing the through hole 11.
It can be understood that, because gas is generated during chemical conversion, the conventional liquid injection process adopts a mode of twice liquid injection to perform liquid injection operation. And during the first liquid injection, the liquid injection amount is lower than the designed liquid injection amount, and the second liquid injection is carried out after the gas generated by the reaction of the electrolyte and the battery core is discharged. In this embodiment, a through hole 11 is formed in a side wall of the battery case 1, and a cylinder 2 made of an aluminum-plastic film material is mounted at the position of the through hole 11, the cylinder 2 has an air chamber 23 capable of accommodating gas, and two opposite ends of the cylinder 2 are open, and the openings at the two ends are a first opening and a second opening 21 communicated with the air chamber 23. After the cylinder 2 is installed, the air chamber 23 of the cylinder 2 is communicated with the accommodating cavity 12 through the through hole 11, and the gas generated in the accommodating cavity 12 can sequentially pass through the through hole 11 and the first opening to enter the air chamber 23. The second opening 21 of the cylinder 2 is closed during formation so that the gas is collected in the gas chamber 23. This mode is favorable to reducing the number of times of annotating the liquid to and the convenience is to gaseous collection, and then improves and annotates liquid efficiency.
Specifically, in step S10, a battery case 1 is provided, the battery case 1 has a rectangular parallelepiped structure, and the through holes 11 are opened in the side walls at both ends of the battery case 1 in the longitudinal direction. Because the through-hole 11 uses as the explosion-proof hole, consequently the position of through-hole 11 can carry out nimble setting according to the suitable position in explosion-proof hole, and the size of through-hole 11 can do corresponding selection according to the particular requirement in explosion-proof hole, and the inside of battery case 1 has the chamber 12 that holds that is used for holding electric core and electrolyte, and the outside of chamber 12 and battery case 1 is held in through-hole 11 intercommunication. Preferably, the through hole 11 is used as a liquid injection hole in a liquid injection process, and the through hole 11 is used as an explosion-proof hole after the manufacturing is completed, so that the through hole 11 has the functions of both the liquid injection hole and the explosion-proof hole, which is beneficial to simplifying the structure of the battery case 1 and saving the processing cost.
In step S20, the battery cell is mounted in the accommodating cavity 12 of the battery case 1, and the battery cell is electrically connected to the positive and negative electrode tabs on the top cover. And the top cover and the shell body are welded and fixed, so that the battery shell 1 forms a closed cavity.
In step 30, a cylinder 2 made of an aluminum-plastic film is provided, and the aluminum-plastic film has high barrier property, good cold press molding property, puncture resistance, electrolyte stability and good insulating property. The cylinder 2 has a gas chamber 23 capable of containing gas, and first and second openings 21 at opposite ends of the cylinder 2, the first and second openings 21 each communicating with the gas chamber 23. One end of the first opening of the cylinder 2 is connected with the side wall of the battery shell 1, and the through hole 11 is communicated with the air chamber 23 inside the cylinder 2, so that the gas generated in formation inside the accommodating cavity 12 can enter the air chamber 23 through the through hole 11 for storage. The first opening is larger than the through hole 11 so that the connection area between the first end of the cylindrical body 2 and the battery case 1 is located on the side wall of the periphery of the through hole 11. In order to facilitate the connection of the barrel 2 with the battery housing 1, the first end of the barrel 2 is provided with a flange 20, the free end of the flange 20 extending in a direction away from the centre line of the barrel 2. The side wall of the battery shell 1 is connected with the flanging 20, so that the connection surface is increased, and the connection stability is improved. The flange 20 may be fixed to the battery case 1 by welding or bonding.
In step S40, an electrolyte injection step is performed, in which an electrolyte is injected into the battery to fully infiltrate the electrolyte into the battery cell. In this embodiment, the through hole 11 also functions as a liquid injection hole. Electrolyte is injected into the receiving chamber 12 of the battery case 1 through the second opening 21 of the second end of the cylinder 2. During liquid injection, the designed capacity of the electrolyte, that is, the required amount of the electrolyte for filling the accommodating chamber 12 at one time, is injected at one time. After filling, the second opening 21 at the second end of the can 2 is sealed, so that the whole battery is in a closed state.
Specifically, when the second opening 21 is sealed, the cylinder 2 is pressed or the cylinder 2 is vacuumized to shrink the inner space of the cylinder 2, so as to exhaust the gas in the cylinder 2, and the second end of the cylinder 2 is sealed by hot pressing or bonding. The cylinder 2 is pressed to make the inner walls of the air chamber 23 close to each other and make the air chamber 23 in a compressed state, and the step can discharge the gas in the air chamber 23 and provide enough accommodating space for the gas discharged from the accommodating cavity 12 to the air chamber 23 in the formation process. The gas in the barrel 2 is discharged in a vacuumizing mode, so that the gas in the barrel is favorably discharged to the greatest extent, the barrel 2 is less contacted, and the appearance of the barrel 2 is favorably ensured to be flat. Meanwhile, the whole cylinder body 2 is in a compressed state, and the second opening 21 of the cylinder body 2 is naturally folded, so that the second opening 21 is conveniently sealed.
In step S50, formation, in which the electrolyte and the battery cell undergo a chemical reaction. The formation of the intermediate receiving chamber 12 generates gas, which passes through the through hole 11 and the first opening in order to enter the gas chamber 23. The gas chamber 23 expands due to the gas received by the cylinder 2, and the cylinder 2 is in an expanded state. To facilitate the gas entering the gas chamber 23 and to avoid the electrolyte from entering the through hole 11, the side of the battery case 1 where the cylinder 2 is installed is placed upward so that the gas generated in the formation process enters the inside of the cylinder 2 through the through hole 11.
In step S60, the gas generated by the formation in the cylinder 2 is discharged. An air extracting device is provided, and air in the cylinder 2 is extracted through the air extracting device. The air exhaust device comprises a needle head and an air pipe connected with the needle head, and the other end of the air pipe is connected with the air storage piece. The syringe needle is used to pierce the cylinder 2, and the gas is pumped into the gas storage part and is treated in a centralized way.
In step S70, a part of the cylindrical body 2 is cut, and the remaining cylindrical body 2 is closed over the through hole 11 to form the rupture disk 22. It will be appreciated that after the formation is completed, the gas storage function of the cylinder 2 is completed, the cylinder 2 is cut to remove the excess portion, and the remaining portion is used as the rupture disk 22. The explosion-proof membrane 22 is sealed on the through hole 11. When the gas generated in the accommodating cavity 12 exceeds a design threshold value during the use of the battery, the gas can burst the explosion-proof membrane 22 to release the pressure. It can be understood that the through hole 11 on the battery shell 1 is used as an explosion-proof hole, and compared with the existing explosion-proof hole arranged on the top cover, the setting position and size of the explosion-proof hole are more flexible to adapt to the explosion-proof requirement of multiple use scenes.
Specifically, after the barrel 2 is cut, the remaining barrel 2 is integrally processed to make the surface thereof flat.
Specifically, the manufacturing method of the cylinder 2 is as follows: through a flaky aluminum-plastic film, the aluminum-plastic film is folded and two opposite ends of the aluminum-plastic film are connected together to form the barrel body 2, the barrel body 2 is of a cuboid structure, and the explosion-proof film 22 is formed on one side surface of the barrel body 2. In this embodiment, the sheet-shaped aluminum-plastic film is folded into a rectangular parallelepiped shape, and both end portions of the aluminum-plastic film are fixed by hot pressing or adhesion. The cylindrical body 2 has four side surfaces, one of which is the rupture disk 22, and when cut, the remaining three side surfaces are removed, the side surface serving as the rupture disk 22 is fixed to the battery case 1 by welding or bonding, and the rupture disk 22 blocks the through-hole 11.
The remarkable effects of the embodiment are as follows: through opening the through hole 11 on the lateral wall of battery shell 1, and install barrel 2 made of plastic-aluminum membrane material in the position of through hole 11, barrel 2 has the gas chamber 23 that can hold the gas, and gas chamber 23 communicates with the inside of battery shell 1. The gas generated in the accommodating chamber 12 can enter the gas chamber 23 through the through hole 11 and the first opening in this order. The second opening 21 of the cylinder 2 is closed during formation so that the gas is collected in the gas chamber 23. This mode is favorable to reducing the number of times of annotating the liquid to and the convenience is to gaseous collection, and then improves and annotates liquid efficiency. Meanwhile, the cylinder 2 is covered on the through hole 11 after the formation is finished to be used as the explosion-proof film 22. The through hole 11 uses as the explosion-proof hole promptly, and the setting position and the size of explosion-proof hole can set up in a flexible way to have better explosion-proof effect and adapt to various use scenes.
Also provides a battery, which is manufactured by the manufacturing method of the battery. The battery includes a battery case 1 and a cell enclosed inside the battery case 1. The top of the battery shell 1 is a top cover, and a positive electrode lug and a negative electrode lug which are electrically connected to the outside are arranged on the top cover at intervals. The side wall of the battery shell 1 is provided with a through hole 11, an explosion-proof membrane 22 is covered on the through hole 11, and the explosion-proof membrane 22 is made of an aluminum plastic membrane material. The strength of the explosion-proof membrane 22 is lower than that of the battery shell 1, when the pressure of gas generated inside the battery in the use process exceeds a design threshold value, the gas can burst the explosion-proof membrane 22 to realize pressure relief, and the safety of the battery is ensured.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A battery manufacturing method is characterized by comprising the following steps:
step S10, providing a battery shell, wherein a through hole is formed in the side wall of the battery shell;
step S20, installing the battery core in the battery shell;
step S30, providing a cylinder made of aluminum plastic film, wherein the cylinder is provided with a first end and a second end which are open, the first end of the cylinder is connected with the battery shell, and the through hole is communicated with the inside of the cylinder;
step S40, injecting liquid, and plugging the second end of the cylinder;
step S50, formation;
step S60, discharging gas generated by the formation in the cylinder;
and step S70, the through hole is sealed by the cylinder, and the part of the cylinder for sealing the through hole forms an explosion-proof membrane.
2. The method for manufacturing the battery according to claim 1, wherein in step S30, the first end of the cylinder is provided with a flange, and a free end of the flange extends in a direction away from a center line of the cylinder to weld or adhesively fix the flange and the battery shell.
3. The method of claim 1, wherein in step S40, the electrolyte is injected into the battery case through the second end of the cylinder, and the second end of the cylinder is sealed.
4. The method of claim 3, wherein the sealing is performed by compressing the can or evacuating the can to shrink the inner space of the can to vent the gas in the can, and sealing the second end of the can by hot pressing or bonding.
5. The method of claim 1, wherein in step S50, the side of the battery case where the barrel is mounted is placed upward, so that gas generated during the formation process enters the barrel through the through holes.
6. The method for manufacturing a battery according to claim 1, wherein in step S60, an air extractor is provided, and air inside the can is extracted by the air extractor.
7. The method for manufacturing a battery according to claim 1, wherein in step S70, a part of the cylindrical body is cut, and the remaining cylindrical body is sealed on the through hole to form the explosion-proof membrane.
8. The method of manufacturing a battery according to claim 7, wherein the remaining can is subjected to a shaping process.
9. The method of claim 7, wherein a sheet of aluminum-plastic film is provided, the aluminum-plastic film is folded and opposite ends of the aluminum-plastic film are connected together to form the barrel, the barrel is of a rectangular parallelepiped structure, and the rupture disk is formed on one side surface of the barrel.
10. A battery manufactured by the method of any one of claims 1 to 9, comprising a battery case and a battery core disposed inside the battery case, wherein a through hole is formed in a side wall of the battery case, and an explosion-proof film made of an aluminum-plastic film material is covered on the through hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110648669.1A CN113381119B (en) | 2021-06-10 | 2021-06-10 | Battery manufacturing method and battery |
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| CN202110648669.1A CN113381119B (en) | 2021-06-10 | 2021-06-10 | Battery manufacturing method and battery |
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| CN113381119B CN113381119B (en) | 2022-08-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024044883A1 (en) * | 2022-08-29 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024044883A1 (en) * | 2022-08-29 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric device |
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