CN110620193A - Machining method for forming anode end face of circular lithium battery - Google Patents
Machining method for forming anode end face of circular lithium battery Download PDFInfo
- Publication number
- CN110620193A CN110620193A CN201910771648.1A CN201910771648A CN110620193A CN 110620193 A CN110620193 A CN 110620193A CN 201910771648 A CN201910771648 A CN 201910771648A CN 110620193 A CN110620193 A CN 110620193A
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- Prior art keywords
- lithium battery
- shell
- shell opening
- circular lithium
- molding
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003754 machining Methods 0.000 title description 2
- 238000000465 moulding Methods 0.000 claims abstract description 47
- 241000237983 Trochidae Species 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000003672 processing method Methods 0.000 claims abstract description 21
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 abstract description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 15
- 229910001416 lithium ion Inorganic materials 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a processing method for molding the anode end face of a circular lithium battery, which comprises the following steps: firstly, a first-time forming jig is adopted for a circular lithium battery shell needing to be subjected to edge covering processing of a top shell opening, and the top shell opening of the circular lithium battery shell is vertically and downwards pressed under the driving of an external pressure mechanism, so that the circular lithium battery shell with the top shell opening subjected to first-time forming is obtained; and secondly, continuing to adopt a second-time forming jig for the round lithium battery shell after the first-time forming of the top shell opening is finished, and vertically and downwards applying pressure to the top shell opening of the round lithium battery shell under the driving of an external pressure mechanism to obtain the round lithium battery shell after the second-time forming of the top shell opening is finished, wherein the top shell opening of the round lithium battery shell is provided with a leveling area. The invention can carry out two times of molding treatment on the shell opening at the top of the circular lithium battery shell, so that the edge of the shell opening at the top of the shell has a top leveling area, and the requirements of an aluminum wire ultrasonic welding process can be met.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a processing method for forming the anode end face of a circular lithium battery.
Background
At present, lithium ion batteries have the advantages of high specific energy, many recycling times, long storage time and the like, are widely applied to portable electronic equipment such as mobile phones, digital video cameras and portable computers, and are also widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the performance requirements on the lithium ion batteries are higher and higher.
For a circular lithium ion battery, the current forming process of the circular lithium ion battery is realized by compressing a steel shell and a battery cover through a pressure mechanism, firstly, the pressure mechanism applies pressure to a battery forming jig to enable the steel shell of the battery to be plastically deformed, so that a shell opening of the steel shell is bent to the center by a certain angle, and the purpose of forming is achieved. Then, in the next process, the battery after sealing is shaped continuously, namely, the total height is made to be consistent through a method of stamping battery edge wrapping.
Therefore, in the existing one-step forming mode, the edge covering of the shell opening at the top of the battery shell is in arc transition, and the force of the edge covering is linear during subsequent shaping, so that the deformation is easy to occur, the neck height of the battery is changed, and the problem of leakage occurs irregularly.
Meanwhile, in view of the wide variety of processes of the current battery assembly (PACK), the welding manner of the battery includes: the battery half-sleeve module is in direct contact direct conduction type, positive and negative electrode resistance welding connection type, and the existing non-heat-shrinkage sleeve aluminum wire ultrasonic welding is adopted, the processes are more and more advanced, and meanwhile, higher requirements are also placed on the forming edge of the battery anode.
In addition, with the increase of the capacity of the circular lithium ion battery, the weight of a single battery needs to be reduced, and the mass-energy ratio of the battery is improved.
The aluminum wire ultrasonic welding method of the circular lithium ion battery is to respectively ultrasonically weld two ends of one section of aluminum wire to the covered edges of the top shell openings of two adjacent circular lithium ion battery shells. Therefore, for the existing round lithium ion battery, the edge covering of the shell opening at the top of the battery shell is in arc transition, and the top of the edge covering is not smooth enough, so that the process requirement of the aluminum wire ultrasonic welding mode of the round lithium ion battery cannot be met. Referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional battery molding jig for conducting pressure to a shell opening portion of a battery shell. In fig. 1, the battery forming jig comprises a mold main body 1, a shell opening edge-covering pressure applying groove 2 is formed in the inner side of the bottom of the mold main body 1, the peripheral edge of the shell opening edge-covering pressure applying groove 2 is in circular arc transition, and the finally obtained edge-covering top of the shell opening at the top of the battery is not smooth enough through the jig and cannot meet the technological requirements of an aluminum wire ultrasonic welding mode of a circular lithium ion battery.
Therefore, the method is suitable for a new battery assembly (PACK) process, so that the edge of the shell opening at the top of the battery shell meets the process requirement of an aluminum wire ultrasonic welding mode, and the battery manufacturing and forming process is improved to be urgent.
Disclosure of Invention
The invention aims to provide a processing method for forming the anode end face of a circular lithium battery aiming at the technical defects in the prior art.
Therefore, the invention provides a processing method for molding the anode end face of a circular lithium battery, which comprises the following steps:
firstly, performing primary preforming on a battery shell needing edge covering: for a circular lithium battery shell needing to be subjected to edge covering processing of a top shell opening, a first-time forming jig is adopted, and under the driving of an external pressure mechanism, the top shell opening of the circular lithium battery shell is vertically and downwards pressed, so that the circular lithium battery shell with the top shell opening subjected to first-time forming is obtained;
secondly, performing secondary forming on the first preformed battery shell: and (3) continuing to adopt a second-time forming jig for the circular lithium battery shell with the top shell opening subjected to the first-time forming, and vertically and downwards applying pressure to the top shell opening of the circular lithium battery shell under the driving of an external pressure mechanism to finally obtain the circular lithium battery shell with the top shell opening subjected to the second-time forming, wherein the top shell opening of the circular lithium battery shell is provided with a leveling area.
In the first step, the first-time forming jig comprises a first-time forming jig main body, and a first-time forming shell opening edge-covering pressure-applying groove is formed in the inner side of the bottom of the first-time forming jig main body;
the section shape of the first-time molding shell opening edge-covering pressure-applying groove is trapezoidal.
In the first step, the peripheral side wall of the first-time molding shell opening edge-covering pressure-applying groove is a linear inclined surface.
In the second step, the second-time forming jig comprises a second-time forming jig main body, and a second-time forming shell opening edge-covering pressure-applying groove is formed in the inner side of the bottom of the second-time forming jig main body;
the secondary molding shell opening edge-covering pressure applying groove comprises a plane part and an arc-shaped bouncing part;
the plane part is a horizontal surface;
the arc-shaped bouncing part is connected with the periphery of the plane part.
Wherein, the height of the arc-shaped bouncing part is increased and then reduced from inside to outside.
Wherein, the highest point of the arc-shaped bouncing part is higher than the height of the plane part.
Wherein, the straight line connecting line between the highest point of the arc-shaped bouncing part and the outermost side of the plane part forms an included angle of 5 degrees with the horizontal plane.
Compared with the prior art, the processing method for forming the anode end face of the circular lithium battery can be used for combining the newly designed first forming jig and the second forming jig to carry out forming treatment on the top shell opening of the circular lithium battery shell twice, so that the edge of the top shell opening of the circular lithium battery shell has a top flat area, the technological requirements of an aluminum wire ultrasonic welding mode of the circular lithium battery can be met, and the processing method has great practical significance.
In addition, the invention adopts a secondary forming process, which can solve the problem of liquid leakage caused by the existing primary forming process, can meet the requirements of the aluminum wire ultrasonic welding process of the circular lithium ion battery, and simultaneously, the aluminum wire welding can play a role of a fuse, thereby indirectly improving the safety of the battery after being grouped.
Drawings
Fig. 1 is a schematic axial sectional view of a conventional battery forming jig for conducting pressure to a shell opening portion of a battery shell;
fig. 2 is a bottom view of a conventional battery molding jig for conducting pressure to a shell opening portion of a battery shell;
FIG. 3 is a flow chart of a processing method for molding the anode end face of a circular lithium battery according to the present invention;
fig. 4 is a schematic axial sectional structure view of a first forming jig used in the processing method for forming the anode end surface of a circular lithium battery according to the present invention;
fig. 5 is a bottom view of a first forming jig used in the processing method for forming the anode end surface of the circular lithium battery provided by the invention;
FIG. 6 is a front view of a second molding jig used in the processing method for molding the positive end surface of a circular lithium battery according to the present invention;
fig. 7 is a schematic axial sectional structure view of a second molding jig used in the processing method for molding the positive end surface of a circular lithium battery according to the present invention;
FIG. 8 is an enlarged schematic view of section I of FIG. 7;
FIG. 9 is an enlarged partial view of portion I of FIG. 7;
fig. 10 is a schematic cross-sectional structure diagram of a top of a circular lithium battery case to be press-molded in the processing method for molding the positive electrode end face of the circular lithium battery according to the present invention, when a top shell opening is not processed (i.e., before edge covering);
fig. 11 is a schematic sectional structure diagram of a connection state between a first molding jig used in the processing method for molding the positive electrode end surface of a circular lithium battery according to the present invention and a top shell opening of a circular lithium battery shell to be pressure molded during a first molding pressure application operation;
fig. 12 is a schematic structural diagram of a top shell opening of a circular lithium battery shell which is formed for the first time, which is obtained after a first molding pressing operation is completed on the top shell opening of the circular lithium battery shell which needs to be formed by pressing by using a first molding jig in the processing method for molding the positive end surface of the circular lithium battery provided by the invention;
fig. 13 is a schematic sectional view of a connection state between a second molding jig used in the method for molding a positive electrode end surface of a circular lithium battery according to the present invention and a top shell opening of a circular lithium battery case after a first molding pressing operation is performed, the second molding pressing operation being performed;
fig. 14 is a schematic structural diagram of a top shell opening of a circular lithium battery shell, which is finally obtained after a second molding pressing operation is performed on the top shell opening of the circular lithium battery shell by using a second molding jig in the processing method for molding the positive end surface of the circular lithium battery provided by the invention;
in the figure, 1 is a die main body, and 2 is a shell opening edge-covering pressure groove;
11 is a first-time forming jig main body, 12 is a first-time forming shell opening edge-covering pressure-applying groove, and 13 is a first piston connecting hole;
21 is a second-time forming jig main body, 22 is a second-time forming shell opening edge-covering pressure-applying groove, and 23 is a second piston connecting hole;
221 is a plane part, 222 is an arc-shaped bouncing part;
30 is a circular lithium battery shell, 31 is a shell opening edge covering, and 32 is a flat area.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 3 to 14, the invention provides a processing method for forming an anode end face of a circular lithium battery, which comprises the following steps:
firstly, performing primary preforming on a battery shell needing edge covering: for a circular lithium battery shell needing to be subjected to edge covering processing of a top shell opening, a first-time forming jig is adopted, and under the driving of an external pressure mechanism, the top shell opening of the circular lithium battery shell is vertically and downwards pressed, so that the circular lithium battery shell with the top shell opening subjected to first-time forming is obtained;
in the first step, specifically, referring to fig. 4 and 5, the first forming jig includes a first forming jig main body 11, and a first forming shell opening edge-covering pressing groove 12 (through holes vertically distributed in the middle) is formed on the inner side of the bottom of the first forming jig main body 11;
the section of the first-time molding shell opening edge-covering pressing groove 12 is trapezoidal.
In particular, the peripheral side wall of the first-time forming shell opening edge-covering pressure-applying groove 12 is a linear inclined surface.
In particular, the external pressure mechanism is a cylinder;
the top of the first forming jig main body 11 is provided with a first piston connecting hole 13;
and a first piston connection hole 13 connected with a power output rod of the cylinder.
Secondly, performing secondary forming on the first preformed battery shell: and (3) continuing to adopt a second-time forming jig for the circular lithium battery shell with the top shell opening subjected to the first-time forming, and vertically and downwards applying pressure to the top shell opening of the circular lithium battery shell under the driving of an external pressure mechanism to finally obtain the circular lithium battery shell with the top shell opening subjected to the second-time forming, wherein the top shell opening of the circular lithium battery shell is provided with a leveling area. As shown in fig. 14, the shell opening edge covering 31 on the top of the circular lithium battery shell 30 finally prepared by applying the method provided by the invention has a wider flat area 32 (which can reach 1.5 ± 0.2 mm).
In the second step, specifically, referring to fig. 6, 7 and 8, the second molding jig includes a second molding jig main body 21, and a second molding casing opening edge-covering pressure applying groove 22 (with vertically distributed through holes in the middle) is formed on the inner side of the bottom of the second molding jig main body 21;
the second molding shell opening edge-covering pressing groove 22 comprises a plane part 221 and an arc-shaped bouncing part 222;
the planar portion 221 is a horizontal surface;
the arc-shaped rising portion 222 is connected to the periphery of the plane portion 221.
In a specific implementation, the height of the arc-shaped bouncing portion 222 is increased and then decreased from inside to outside (i.e. from the direction close to the axis of the second-time forming jig main body).
In a specific implementation, the highest point of the arc-shaped bouncing portion 222 is higher than the plane portion 221;
an angle a between a straight line connecting the highest point of the arc-shaped rising portion 222 and the outermost side of the plane portion 221 and the horizontal plane is 3 to 16 °, and preferably 5 °.
In particular, the external pressure mechanism is a cylinder;
the top of the second secondary forming jig main body 21 is provided with a second piston connecting hole 23;
and a second piston connection hole 23 connected with a power output rod of the cylinder.
In order to more clearly understand the technical solution of the present invention, the present invention is further described below.
The invention aims to improve the forming process by newly designing a forming jig so as to meet the requirement of novel PACK.
Firstly, calculating the neck height requirement of the rolling groove according to the aluminum wire ultrasonic welding requirement on the top of the circular lithium ion battery shell and the size shown in fig. 14, and then calculating and forming the primary bending angle according to the determined neck height.
And then, preliminarily designing the shape and the angle of the forming jig according to the requirements of customers.
According to the invention, the final confirmation angle of the rebound amount of the wrapping edge after secondary forming is 3-16 degrees through calculation. The shaping tool after the design transformation divide into 2 times shaping, and tool processing is easier and satisfy new PACK technology, also plays the effect to the deformation outward appearance improvement of battery case moreover, also satisfies the battery simultaneously and subtracts heavy demand, reduces the battery cover cost, also is very effectual to practicing thrift the cost.
The technical problem to be solved by the invention is that the existing anode forming process of the circular lithium ion battery cannot meet the requirements of the current industry on battery weight reduction and the need of adapting to a novel PACK welding process (specifically aluminum wire welding). Therefore, a new battery forming jig is specially designed, secondary forming is carried out on the battery, and after forming, the width of the covered flat area can be larger than 1mm, so that the requirement of ultrasonic welding of the aluminum wires of the circular lithium ion battery is met.
Compared with the prior art, the invention has the following beneficial effects:
1. the secondary forming can solve the problem of easy liquid leakage of the original primary forming.
2. Because the two-time forming is improved, the efficiency of the sealing machine is not influenced.
3. The novel forming process has smooth edge covering and more stable forming size.
4. Because the top of bordure of fashioned round lithium cell casing top shell mouth is the leveling zone, not only effectively adapts to new PACK technology aluminium wire and welds the requirement, can also reduce the tool processing degree of difficulty, indirectly reduces manufacturing cost.
Therefore, compared with the prior art, the processing method for molding the anode end face of the circular lithium battery, provided by the invention, can be used for molding the shell opening at the top of the circular lithium battery shell twice by combining the newly designed first molding jig and the second molding jig, so that the edge of the shell opening at the top of the circular lithium battery shell has a top flat area, the technological requirements of an aluminum wire ultrasonic welding mode of the circular lithium battery can be met, and the processing method has great practical significance.
In addition, the invention adopts a secondary forming process, which can solve the problem of liquid leakage caused by the existing primary forming process, can meet the requirements of the aluminum wire ultrasonic welding process of the circular lithium ion battery, and simultaneously, the aluminum wire welding can play a role of a fuse, thereby indirectly improving the safety of the battery after being grouped.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A processing method for forming the end face of the anode of a circular lithium battery is characterized by comprising the following steps:
firstly, performing primary preforming on a battery shell needing edge covering: for a circular lithium battery shell needing to be subjected to edge covering processing of a top shell opening, a first-time forming jig is adopted, and under the driving of an external pressure mechanism, the top shell opening of the circular lithium battery shell is vertically and downwards pressed, so that the circular lithium battery shell with the top shell opening subjected to first-time forming is obtained;
secondly, performing secondary forming on the first preformed battery shell: and (3) continuing to adopt a second-time forming jig for the circular lithium battery shell with the top shell opening subjected to the first-time forming, and vertically and downwards applying pressure to the top shell opening of the circular lithium battery shell under the driving of an external pressure mechanism to finally obtain the circular lithium battery shell with the top shell opening subjected to the second-time forming, wherein the top shell opening of the circular lithium battery shell is provided with a leveling area.
2. The processing method according to claim 1, wherein in the first step, the first molding jig comprises a first molding jig main body (11), and the bottom inner side of the first molding jig main body (11) is provided with a first molding shell opening edge-covering pressing groove (12);
the section of the first-time molding shell opening edge-covering pressing groove (12) is trapezoidal.
3. The process according to claim 2, wherein in the first step, the peripheral side wall of the first molding shell opening edge-covering pressing groove (12) is a linear inclined surface.
4. The processing method according to claim 1, wherein in the second step, the second molding jig comprises a second molding jig main body (21), and the inner side of the bottom of the second molding jig main body (21) is provided with a second molding shell opening edge-covering pressing groove (22);
the second-time forming shell opening edge-covering pressing groove (22) comprises a plane part (221) and an arc-shaped bouncing part (222);
the plane part (221) is a horizontal surface;
the arc-shaped upspring part (222) is connected with the periphery of the plane part (221).
5. The process of claim 4 wherein the arcuate raised portion (222) increases in height from the inside out and then decreases in height.
6. The process according to claim 4, wherein the highest point of the arcuate raised portion (222) is higher than the height of the flat portion (221).
7. The process of claim 4 wherein the line connecting the highest point of the arcuate raised portion (222) and the outermost side of the flat surface portion (221) makes an angle of 5 ° with the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771648.1A CN110620193A (en) | 2019-08-21 | 2019-08-21 | Machining method for forming anode end face of circular lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771648.1A CN110620193A (en) | 2019-08-21 | 2019-08-21 | Machining method for forming anode end face of circular lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110620193A true CN110620193A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910771648.1A Withdrawn CN110620193A (en) | 2019-08-21 | 2019-08-21 | Machining method for forming anode end face of circular lithium battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN110620193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216056A1 (en) * | 2022-05-09 | 2023-11-16 | 宁德时代新能源科技股份有限公司 | Device and method for preparing battery cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001028259A (en) * | 1999-07-15 | 2001-01-30 | Matsushita Electric Ind Co Ltd | Sealed battery |
| JP2002324523A (en) * | 2001-04-25 | 2002-11-08 | Matsushita Electric Ind Co Ltd | Method for sealing opening of sealed cell |
| JP2012038650A (en) * | 2010-08-10 | 2012-02-23 | Hitachi Vehicle Energy Ltd | Sealed structure of secondary cell |
| CN109075373A (en) * | 2016-12-22 | 2018-12-21 | 株式会社Lg化学 | Cylindrical battery unit making equipment including secondary crimping mold |
-
2019
- 2019-08-21 CN CN201910771648.1A patent/CN110620193A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001028259A (en) * | 1999-07-15 | 2001-01-30 | Matsushita Electric Ind Co Ltd | Sealed battery |
| JP2002324523A (en) * | 2001-04-25 | 2002-11-08 | Matsushita Electric Ind Co Ltd | Method for sealing opening of sealed cell |
| JP2012038650A (en) * | 2010-08-10 | 2012-02-23 | Hitachi Vehicle Energy Ltd | Sealed structure of secondary cell |
| CN109075373A (en) * | 2016-12-22 | 2018-12-21 | 株式会社Lg化学 | Cylindrical battery unit making equipment including secondary crimping mold |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216056A1 (en) * | 2022-05-09 | 2023-11-16 | 宁德时代新能源科技股份有限公司 | Device and method for preparing battery cell |
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Application publication date: 20191227 |