CN110112330A - Battery differential thickness steel casing and its production method - Google Patents
Battery differential thickness steel casing and its production method Download PDFInfo
- Publication number
- CN110112330A CN110112330A CN201910480807.2A CN201910480807A CN110112330A CN 110112330 A CN110112330 A CN 110112330A CN 201910480807 A CN201910480807 A CN 201910480807A CN 110112330 A CN110112330 A CN 110112330A
- Authority
- CN
- China
- Prior art keywords
- battery
- steel casing
- difference
- thickness steel
- stack shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000010409 ironing Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 4
- 239000011324 bead Substances 0.000 abstract description 12
- 230000007704 transition Effects 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002788 crimping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (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 kind of battery differential thickness steel casing and its production method, which includes: stack shell ontology, sealing end, the changeover portion between stack shell ontology and sealing end；Wherein, the thick groove of the difference of battery differential thickness steel casing is located at stack shell ontology.Battery differential thickness steel casing disclosed by the invention, by being arranged poor thick groove in stack shell ontology, since changeover portion is between stack shell ontology and sealing end, realize the thick groove of separation difference and transition wire, the intensity for then improving changeover portion effectively reduces battery in seal bead in occurring the probability of battery external drum phenomenon in easily-deformable area；Meanwhile only by changing the position of the thick groove of difference, can reduce battery also not will increase production cost without increasing station and mould structure in the probability for occurring battery external drum phenomenon in easily-deformable area in seal bead.
Description
Technical field
The present invention relates to battery case technical fields, more specifically to a kind of battery differential thickness steel casing and its producer
Method.
Background technique
Differential thickness steel casing is gradually widely used in battery because of its significant superiority.As shown in Figure 1, differential thickness steel casing includes:
Stack shell ontology 13, the positive terminal 14 positioned at 13 bottom end of stack shell ontology, the sealing end 11 positioned at 13 top of stack shell ontology, and be located at
Changeover portion 12 between stack shell ontology 13 and sealing end 11；Wherein, the thinner thickness of stack shell ontology 13, referred to as thin segment, thin-walled
The thickness t of section1Less than material stock thickness；The thickness of sealing end 11 is thicker, referred to as heavy wall section, and heavy wall section retains material stock thickness,
That is the thickness t of heavy wall section2More than or equal to material thickness.Because differential thickness steel casing has thin segment and heavy wall section, and by Multi-position drawing
Technique decision, the lapping defect between objective reality thin segment and heavy wall section, i.e., poor thick groove 17, difference thickness groove 17 are located at changeover portion
12。
Cell production method are as follows: then the first filler into differential thickness steel casing implements rolling line to differential thickness steel casing, rolling line position is general
At above-mentioned changeover portion 12, rolling line slot 15 is formed, as shown in Fig. 2, being reloaded into cathode sealing, current collection assembly, finally sealing is rolled up
Side, direction as shown by the arrows in Figure 2 carry out crimping.During seal bead, biggish axial compressive force, differential thickness steel casing can be generated
It itself can weaken the anti-pressure ability of steel shell, 17 position of difference thickness groove, i.e. changeover portion 12 is that entire differential thickness steel casing is most weak
Position, difference thickness groove 17 is nearby easily-deformable area 16, then is easier to generate battery external drum in easily-deformable area 16 in seal bead
Phenomenon causes battery to have major defect.
In conclusion how to design battery differential thickness steel casing, to improve the intensity of changeover portion, sealed to reduce battery
In occurring the probability of battery external drum phenomenon in easily-deformable area 16 when crimping, being that current those skilled in the art are urgently to be resolved is asked
Topic.
Summary of the invention
The object of the present invention is to provide a kind of battery differential thickness steel casings, to improve the intensity of changeover portion, to reduce battery
In seal bead in occurring the probability of battery external drum phenomenon in easily-deformable area.It is a further object of the present invention to provide a kind of batteries
With the production method of differential thickness steel casing.
To achieve the goals above, the invention provides the following technical scheme:
A kind of battery differential thickness steel casing, comprising: stack shell ontology, sealing end are located at the stack shell ontology and the sealing end
Between changeover portion；Wherein, the thick groove of the difference of the battery differential thickness steel casing is located at the stack shell ontology.
Preferably, thick distance of the groove away from the changeover portion of the difference is 1.5mm-4.0mm.
Preferably, the distance on top of the thick groove of difference away from the sealing end is 5.0mm-7.5mm.
Preferably, the stack shell ontology with a thickness of 0.16mm-0.20mm, the sealing end with a thickness of 0.25mm-
0.28mm。
Battery differential thickness steel casing provided by the invention, by being arranged poor thick groove in stack shell ontology, due to transition section
Between stack shell ontology and sealing end, the thick groove of separation difference and transition wire are realized, then improves the intensity of changeover portion, that is, improves
The intensity of rolling line groove position position of the steel shell when making battery, effectively reduces battery in seal bead in mutability
Occurs the probability of battery external drum phenomenon in shape area.
Meanwhile battery differential thickness steel casing provided by the invention can reduce battery only by changing the position of the thick groove of difference
Also will not in the probability for occurring battery external drum phenomenon in easily-deformable area without increasing station and mould structure in seal bead
Increase production cost.
Battery differential thickness steel casing based on above-mentioned offer, the present invention provides a kind of producers of battery differential thickness steel casing
Method, the production method of the battery differential thickness steel casing comprising steps of
1) ironing workpiece, so that the workpiece has the first heavy wall section and the first thin segment, the first heavy wall section
There is the thick groove of difference between first thin segment；
2) stack shell sheet is body formed, so that the workpiece has the second heavy wall section and the second thin segment, the second heavy wall section
There is changeover portion between second thin segment；
3) sealing end forms；
4) positive terminal forms；
5) it is punched faucal waste material；
Wherein, the material volume of second thin segment is greater than the material volume of the first thin segment, difference thick groove position
In second thin segment.
Preferably, thick distance of the groove away from the changeover portion of the difference is 1.5mm-4.0mm.
Preferably, the distance on top of the thick groove of difference away from battery differential thickness steel casing is 5.0mm-7.5mm.
Preferably, second thin segment with a thickness of 0.16mm-0.20mm, the second heavy wall section with a thickness of
0.25mm-0.28mm。
Preferably, it is further comprised the steps of: before the step 1)
11) workpiece described in not ironing for the first time；
12) workpiece described in not ironing for the second time；
13) workpiece described in third time not ironing；
14) workpiece described in the 4th not ironing.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram for the battery differential thickness steel casing that the prior art provides；
The schematic diagram of rolling line and seal bead in the cell production method that Fig. 2 provides for the prior art；
Fig. 3 is the structural schematic diagram of battery differential thickness steel casing provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the production method of battery differential thickness steel casing provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in figure 3, battery differential thickness steel casing provided in an embodiment of the present invention includes: stack shell ontology 24, sealing end 21, position
Changeover portion 22 between stack shell ontology 24 and sealing end 21；Wherein, the thick groove 23 of the difference of battery differential thickness steel casing is located at stack shell
Ontology 24.It is understood that difference thickness groove 23 is located at changeover portion 22 close to the side of the positive terminal of battery differential thickness steel casing.
Battery differential thickness steel casing provided in an embodiment of the present invention, by by the poor thick setting of groove 23 in stack shell ontology 24, by
In changeover portion 22 between stack shell ontology 24 and sealing end 21, the thick groove 23 of separation difference and transition wire 22 are realized, then is improved
The intensity of changeover portion 22 effectively reduces battery in seal bead in occurring the several of battery external drum phenomenon in easily-deformable area
Rate.The easily-deformable area is easily-deformable area 16 shown in Fig. 2.
Meanwhile battery differential thickness steel casing provided in an embodiment of the present invention, only pass through the position of the thick groove 23 of change difference
Reduce battery in seal bead in occurring the probability of battery external drum phenomenon in easily-deformable area, without increasing station and mold knot
Structure also not will increase production cost.The easily-deformable area is easily-deformable area 16 shown in Fig. 2.
In above-mentioned battery differential thickness steel casing, for poor thick groove 23 at a distance from changeover portion 22, carry out according to actual needs
Selection, it is not limited in the embodiment of the present invention.Preferably, thick distance of the groove 23 away from changeover portion 22 of above-mentioned difference is 1.5mm-
4.0mm, as shown in figure 3, difference thickness distance of the groove 23 away from changeover portion 22 is L1, L1=1.5mm-4.0mm.It certainly, can also be according to reality
Border needs to select poor thick distance of the groove 23 away from changeover portion 22 to be other numerical value, it is not limited to this.
In above-mentioned battery differential thickness steel casing, for the specific location of poor thick groove 23, it is designed according to actual needs.It is excellent
The distance of selection of land, top of the difference thickness groove 23 away from sealing end 21 is 5.0mm-7.5mm, as shown in figure 3, difference thickness groove 23 is away from sealing
The distance on the top at end 21 is L2, L2=5.0mm-7.5mm.Certainly, top of the thick groove 23 of difference away from sealing end 21 also may be selected
Distance is other numerical value, it is not limited to above-described embodiment.
Preferably, above-mentioned stack shell ontology 24 with a thickness of 0.16mm-0.20mm, above-mentioned sealing end 21 with a thickness of
0.25mm-0.28mm.Certainly, the thickness of above-mentioned stack shell ontology 24 and sealing end 21 can also be suitably adjusted according to actual needs
Value, it is not limited to this.
The battery differential thickness steel casing provided based on the above embodiment, it is thick with difference that the embodiment of the invention also provides a kind of batteries
The production method of steel shell, as shown in figure 4, the production method of battery differential thickness steel casing specifically includes step:
S01) ironing workpiece, so that workpiece has the first heavy wall section 31 and the first thin segment 32, the first heavy wall section 31
And first have the thick groove 37 of difference between thin segment 32:
Specifically, the position of poor thick groove 37 is adjusted by adjusting the height of the first heavy wall section 31.
S02) stack shell sheet is body formed, so that workpiece has the second heavy wall section 33 and the second thin segment 34, the second heavy wall section 33
And second have changeover portion 38 between thin segment 34:
It is understood that the material volume of the second thin segment 34 is greater than the material volume of the first thin segment 32, in this way, protecting
It has demonstrate,proved poor thick groove 37 and has been located at the second thin segment 34.
Specifically, the first thin segment 32 is further stretched, until stack shell molding is straightened, and rushes positive cartridge base type in advance, second
The thickness control of thin segment 34 is in 0.16mm-0.20mm.
S03) sealing end forms:
It is understood that the station is the sealing end molding of the second heavy wall section 33, the position of poor thick groove 37 is not changed
It sets.
After sealing end molding, workpiece has third heavy wall section 35 and third thin segment 36, the thickness control of third heavy wall section 35
For system in 0.25mm-0.28mm, third thin segment 36 still retains the shape and size of the second thin segment 34.
S04) positive terminal forms:
Specifically, positive terminal forms, and can once complete, and above in two times can also complete.Preferably, positive terminal, which forms, includes
Step positive terminal is preforming and positive terminal forms.
S05) it is punched faucal waste material:
After waste material is cut off, that is, complete production.
It should be noted that changeover portion 38 of the rolling line groove of battery in battery differential thickness steel casing.
The production method of battery differential thickness steel casing provided in an embodiment of the present invention, by being arranged poor thick groove 37 second
Thin segment 34, final poor thick groove 37 are located at stack shell ontology, realize the thick groove 37 of separation difference and transition wire 38, then improved
The intensity of branch-cut bridge 38 effectively reduces battery in seal bead in occurring the probability of battery external drum phenomenon in easily-deformable area.It should
Easily-deformable area is easily-deformable area 16 shown in Fig. 2.
Meanwhile the production method of battery differential thickness steel casing provided in an embodiment of the present invention, only by changing the thick groove 37 of difference
Position, can reduce in seal bead in occurring the probability of battery external drum phenomenon in easily-deformable area, without increase station and
Mould structure also not will increase production cost.The easily-deformable area is easily-deformable area 16 shown in Fig. 2.
Preferably, thick distance of the groove 37 away from changeover portion 38 of above-mentioned difference is 1.5mm-4.0mm.It certainly, can also be according to reality
It needs to select poor thick distance of the groove 37 away from changeover portion 38 to be other numerical value, it is not limited to this.
Preferably, the distance on top of the above-mentioned thick groove 37 of difference away from battery differential thickness steel casing is 5.0mm-7.5mm, such as Fig. 4
Shown, the distance on top of the difference thickness groove 37 away from battery differential thickness steel casing is L2, L2=5.0mm-7.5mm.Certainly, it also may be selected
The distance on poor top of the thickness groove 37 away from battery differential thickness steel casing is other numerical value, it is not limited to above-described embodiment.
Preferably, in the production method of above-mentioned battery differential thickness steel casing, the second thin segment 34 with a thickness of 0.16mm-
0.20mm, the second heavy wall section 33 with a thickness of 0.25mm-0.28mm.Certainly, it can also suitably adjust according to actual needs above-mentioned
The thickness value of second thin segment 34 and the second heavy wall section 33, it is not limited to this.
For the specific steps of above-mentioned ironing, it is designed according to actual needs.Preferably, the step S01) it
Before further comprise the steps of:
S011) first time not thinning stretched part；
S012) not thinning stretched part for the second time；
S013) the not thinning stretched part of third time；
S014) the 4th not thinning stretched part.
It is to be appreciated that not ironing refer to stretch after the wall thickness of entire workpiece there is no thickness difference.For constant every time
The specific drawing coefficient of thin stretching, is set, it is not limited in the embodiment of the present invention according to actual needs.
Aforementioned four step can carry out respectively in four stations, and specifically, not thinning stretched part is for the first time for the first time
Not ironing station carries out, not thinning stretched part is constant in the progress of the station of not ironing for the second time, third time for the second time
Thin stretched part is in the progress of the station of not ironing for the third time, the 4th not thinning stretched part in the 4th not ironing work
Position carries out.Certainly, transition station can also be set between two adjacent stations, for example, the station for completing step S011 and
It completes that transition station is arranged between the station of step S012, it is not limited in the embodiment of the present invention.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
Claims (9)
1. a kind of battery differential thickness steel casing, comprising: stack shell ontology, sealing end, be located at the stack shell ontology and the sealing end it
Between changeover portion；It is characterized in that, the thick groove of the difference of the battery differential thickness steel casing is located at the stack shell ontology.
2. battery differential thickness steel casing according to claim 1, which is characterized in that the thick groove of difference is away from the changeover portion
Distance is 1.5mm-4.0mm.
3. battery differential thickness steel casing according to claim 1, which is characterized in that the thick groove of difference is away from the sealing end
The distance on top is 5.0mm-7.5mm.
4. battery differential thickness steel casing according to claim 1, which is characterized in that the stack shell ontology with a thickness of
0.16mm-0.20mm, the sealing end with a thickness of 0.25mm-0.28mm.
5. a kind of production method of battery differential thickness steel casing, which is characterized in that comprising steps of
1) ironing workpiece, so that the workpiece has the first heavy wall section and the first thin segment, the first heavy wall section and institute
Stating between the first thin segment has the thick groove of difference；
2) stack shell sheet is body formed, so that the workpiece has the second heavy wall section and the second thin segment, the second heavy wall section and institute
Stating has changeover portion between the second thin segment；
3) sealing end forms；
4) positive terminal forms；
5) it is punched faucal waste material；
Wherein, the material volume of second thin segment is greater than the material volume of the first thin segment, and the thick groove of difference is located at institute
State the second thin segment.
6. production method according to claim 5, which is characterized in that the thick distance of the groove away from the changeover portion of difference be
1.5mm-4.0mm。
7. production method according to claim 5, which is characterized in that the thick groove of difference is away from the battery differential thickness steel casing
Top distance be 5.0mm-7.5mm.
8. production method according to claim 5, which is characterized in that second thin segment with a thickness of 0.16mm-
0.20mm, the second heavy wall section with a thickness of 0.25mm-0.28mm.
9. production method according to claim 5, which is characterized in that further comprised the steps of: before the step 1)
11) workpiece described in not ironing for the first time；
12) workpiece described in not ironing for the second time；
13) workpiece described in third time not ironing；
14) workpiece described in the 4th not ironing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910480807.2A CN110112330A (en) | 2019-06-04 | 2019-06-04 | Battery differential thickness steel casing and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910480807.2A CN110112330A (en) | 2019-06-04 | 2019-06-04 | Battery differential thickness steel casing and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110112330A true CN110112330A (en) | 2019-08-09 |
Family
ID=67493695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910480807.2A Pending CN110112330A (en) | 2019-06-04 | 2019-06-04 | Battery differential thickness steel casing and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110112330A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200990393Y (en) * | 2006-09-04 | 2007-12-12 | 中银（宁波）电池有限公司 | Battery case body and battery produced with the same battery case body |
| JP2009230991A (en) * | 2008-03-21 | 2009-10-08 | Sanyo Electric Co Ltd | Cylindrical cell and manufacturing method of cylindrical cell |
| CN209658239U (en) * | 2019-06-04 | 2019-11-19 | 宁波光华电池有限公司 | Battery differential thickness steel casing |
-
2019
- 2019-06-04 CN CN201910480807.2A patent/CN110112330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200990393Y (en) * | 2006-09-04 | 2007-12-12 | 中银（宁波）电池有限公司 | Battery case body and battery produced with the same battery case body |
| JP2009230991A (en) * | 2008-03-21 | 2009-10-08 | Sanyo Electric Co Ltd | Cylindrical cell and manufacturing method of cylindrical cell |
| CN209658239U (en) * | 2019-06-04 | 2019-11-19 | 宁波光华电池有限公司 | Battery differential thickness steel casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1215206A (en) | Process for making a closure | |
| CN107214230B (en) | Hole flanging wall thickness is greater than the moulding process of material stock thickness | |
| US20130205857A1 (en) | Method of manufacturing flange for wind towers using ring rolling method | |
| WO2006078690A2 (en) | System and process for forming battery cans | |
| CN209658239U (en) | Battery differential thickness steel casing | |
| CN105149455A (en) | Drawing and forming method for deep cylindrical piece and mould thereof | |
| CN110112330A (en) | Battery differential thickness steel casing and its production method | |
| US7985496B2 (en) | Side terminal and insert, method and apparatus for manufacturing same | |
| CN103531728A (en) | Steel shell of alkaline zinc-manganese battery and production process thereof | |
| JP2007329080A (en) | Battery can and its manufacturing method | |
| CN103996879A (en) | Winding battery plate group and preparation method thereof | |
| CN105322692A (en) | Motor housing and forming method therefor | |
| US20230347403A1 (en) | A punch and a die for stretching battery case body and stretching process therefor | |
| JP2022120828A (en) | Manufacturing method of metallic cup | |
| CN211074364U (en) | Lithium ion secondary battery shell punching die | |
| US2764810A (en) | Process for making a rectangularized television tube body | |
| JP4653196B2 (en) | Method for manufacturing deformable container | |
| CN215750973U (en) | Machining die for corner structure in special-shaped lithium ion battery bevel | |
| CN109994661A (en) | Alkaline zinc-manganese battery and production process of battery steel shell | |
| KR20200006278A (en) | Canteen Body And Method For Molding Thereof | |
| WO2018173453A1 (en) | Battery can and cylindrical battery | |
| CN111300811B (en) | Strong acid and alkali resistant center reinforced positive and negative pressure resistant inner and outer lining tetrafluoro pipeline and manufacturing process | |
| CN217334329U (en) | Novel aluminum shell integrated explosion-proof valve | |
| CN215186123U (en) | Rotor yoke for external rotor motor | |
| JP3247570B2 (en) | Battery can manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |