CN108500106A - A kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell - Google Patents
A kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell Download PDFInfo
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- CN108500106A CN108500106A CN201810344568.3A CN201810344568A CN108500106A CN 108500106 A CN108500106 A CN 108500106A CN 201810344568 A CN201810344568 A CN 201810344568A CN 108500106 A CN108500106 A CN 108500106A
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- explosion
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- groove
- lug boss
- shell
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- 239000010963 304 stainless steel Substances 0.000 title claims abstract description 33
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 title claims abstract description 33
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000004880 explosion Methods 0.000 claims abstract description 65
- 238000004080 punching Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 3
- 210000004027 cell Anatomy 0.000 claims description 18
- 210000002421 cell wall Anatomy 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 206010016766 flatulence Diseases 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/04—Stamping using rigid devices or tools for dimpling
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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
- H01M50/317—Re-sealable arrangements
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell, which is characterized in that step is：Carried out axially outwards at the shell bottom center of tubular shell it is one time punching molded, formed with anti-explosion groove lug boss, the ratio between the explosion-proof slot length L and lobes outside diameter D be 0.7 1:1, the anti-explosion groove is the dovetail groove of opening outwardly, and 304 stainless steel explosion-proof casings are obtained after detection is qualified.Cold stamping one-pass molding of the present invention directly obtains high spot and anti-explosion groove, and explosion-proof groove shape is regular, and high spot will not be affected by it, and the machining accuracy of anti-explosion groove is improved under the premise of saving process, energy-efficient.
Description
Technical field
The present invention relates to battery technology fields, anti-in particular to a kind of 304 stainless steels of lithium-thionyl chloride power type battery
Quick-fried shell preparation method.
Background technology
Lithium thionyl chloride cell has high-energy-density and high-specific-power characteristic, the suitable TNT of chemical ratio energy of system fried
9-10 times of medicine, under normal circumstances, battery are outwardly to export energy under slave mode.When inside battery existing defects or outside
Under portion's short circuit or abuse condition, it may occur however that pernicious explosion endangers personal safety, especially discharging surface and accumulates high power-type electricity
The safety in pond, battery is the universal attention of people and concern.
Some battery cases also have Explosion-proof Design, the Chinese invention patent application of Publication No. CN101459230A public at present
A kind of explosion prevention coiling type power lithium battery has been opened, at the bottom of cylindrical shell setting stainless steel case bottom, has been arranged on shell bottom and carves
Trace type pressure relief opening, shell Bottom Shape are the ring of design outwardly convex in the groove of recessed battery, this shell bottom has the disadvantage that：1. shape
Shape is complicated, processing difficulties, and the structure of recess and protrusion keeps its occupancy inside battery space larger, and same model design space is caused to become
It is small；2. shell bottom needs to weld with housing seal, process is caused to increase, increases by 1 lap welding process and increase welding quality risk；3.
Pressure relief opening is located on the recessed groove outer wall of reverse V-shaped ring edge, is arranged at rear cover radial direction both ends, this both ends are shorter and smaller to let out
Pressure mouth can cause pressure release slow, to reduce the effect of directional pressure venting；4. the indentation of pressure relief opening is line style, width and depth all pole
It is small, and rectangular cross-section, it can cause weak spot at this that can not open moment, detonation velocity is slow.Prevent made of above-mentioned 304 stainless steel
Quick-fried shell will cause irregularly to tear since pressure relief opening is smaller, though reducing brisance, explosion is still formed, and has been unable to reach
The effect of full directional explosion-proof pressure release.
Therefore, it is necessary to develop a kind of handling ease, have a safety feature, be not take up inside battery space lithium-thionyl chloride electricity
The 304 stainless steel explosion-proof casing preparation methods in pond.
Invention content
Present invention aim to solve the deficiency of above-mentioned background technology, provide a kind of handling ease, have a safety feature,
It is not take up 304 stainless steel explosion-proof casing preparation methods of inside battery space lithium thionyl chloride cell.
The technical scheme is that：A kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell, it is special
Sign is that step is：
Carry out one time punching molded, protrusion of the formation with anti-explosion groove axially outwards at the shell bottom center of tubular shell
Portion, the ratio between the explosion-proof slot length L and lobes outside diameter D are 0.7-1:1, the anti-explosion groove is the dovetail groove of opening outwardly, inspection
304 stainless steel explosion-proof casings are obtained after surveying qualification.
This programme punching press at the center of shell bottom obtains the lug boss of anti-explosion groove, lug boss as tympanites primary deformation position,
Larger internal pressure is alleviated, the anti-explosion groove at lug boss center is deformed when internal pressure continues to be increased to pressure threshold value to be torn, trapezoidal
Slot number is extremely beneficial as weakness：1. comparison rectangular groove wall in the prior art, inclined trapezoidal cell wall is to slot bottom outwardly
Attachment force is weaker, and when rupture is more easy to open, and pressure is in the emission state to scatter outwardly when 2. cell fracture, and trapezoidal cell wall is more sharp
The ejection of internal gas and electrolyte, quick pressure releasing under the pressure state.
Preferably, the one time punching molded lower mold used includes opening up, inner circumferential and shell peripheral shape pair
The first recessed portion answered, first recessed portion bottom surface is corresponding with shell bottom, first recessed portion bottom surface to have be used for shape
At the second recessed portion of lug boss, second recessed portion bottom surface be equipped with upward protrusion, be used to form the trapezoidal radial direction of anti-explosion groove
Rib；The one time punching molded upper mold used is outer diameter cylinder corresponding with lug boss internal diameter.In the prior art high spot with
Indentation belongs to post forming, first on shell bottom at first stamped bumps, then is directly carved and is obtained with knife in outer surface, this technique will cause
High spot easy compressive deformation when it is uneven to mark the depth, and marking；And this programme is cold stamping one-pass molding directly obtains protrusion
Place and anti-explosion groove, explosion-proof groove shape is regular, and high spot will not be affected by it.This programme improves under the premise of saving process
The machining accuracy of anti-explosion groove, it is energy-efficient.
Preferably, described one time punching molded to be：Shell is sheathed in the first recessed portion of lower mold, shell bottom and first recessed
Concave portion bottom surface, for the upper mold downwardly toward the punching press of shell bottom, forming outer surface has the lug boss of anti-explosion groove.
Preferably, the shell by thickness 0.4-0.7mm, hardness 150-400HV 304 stainless steel belts through continuous drawing
Technique, edge notches, cleaning, high temperature are consolidated melt processed and are obtained.This programme is processed using 304 stainless steel belts, thickness
0.4-0.7mm, hardness 150-400HV are entire battery weight to be made big if thickness is too big, difficulty of processing most useful for processing
Greatly, the too big then punching press of hardness is more difficult, and since battery has internal pressure, hardness is too small, can make easily to deform at processing,
It is unfavorable for packaging, transport and uses.
Preferably, the lug boss is the circle coaxial with shell bottom and anti-explosion groove radially passes through lug boss center.
Preferably, lug boss wall thickness C at anti-explosion groove does not open up the ratio between wall thickness H at anti-explosion groove with lug boss and is
0.2125-0.23:1.Wall thickness C is extremely critical at anti-explosion groove in this programme, and can complete packaging in daily resistance inner pressure of battery makes
With, and can rapidly be torn when reaching pressure threshold value, it ensure that the safety of battery.
Preferably, the anti-explosion groove is that notch is wider than the isosceles trapezoid slot of slot bottom, angle X between two cell walls of the anti-explosion groove
It it is 45-90 °, the slot bottom width W of the anti-explosion groove is 0.1-0.5mm.Included angle A too conference causes bottom surface deformation not between two cell walls
It is flat, it is too small to increase pressure release resistance；Slot bottom width W too conferences cause it is daily it is yielding, rupture when deformation at irregular, too small meeting
Increase pressure release resistance, 0.1-0.5mm, 45-90 ° of sections advantageously ensure that anti-explosion groove is uniformly split in pressure threshold value in this programme
It opens.
Preferably, it is specially to be heated to the stainless steel to be quickly cooled to room temperature after 1100 DEG C to make that the high temperature, which consolidates melt processed,
Carbon reaches hypersaturated state.Be conducive to make Carbide Phases all with this or basic dissolving, carbon are solid-solution in austenite, then quickly
It is cooled to room temperature, carbon is made to reach hypersaturated state, purpose is mainly to improve the plasticity and toughness of steel and alloy, makes stainless steel alloy
In various phases fully dissolve, Intensive intervention body, and improve toughness and etch resistant properties eliminates stress and softening, to continue to process
Or molding.
The present invention also provides a kind of 304 stainless steel explosion-proof casing preparation methods of any of the above-described lithium thionyl chloride cell to be made
304 stainless steel explosion-proof casings, including shell, which is characterized in that the shell include cyclic annular body and with body one at
The shell bottom of type is equipped with lug boss axially outwards at the center of the shell bottom, and the lug boss top surface is recessed anti-explosion groove, described
Anti-explosion groove is the dovetail groove of opening outwardly.
Preferably, the lug boss is the circle coaxial with shell bottom and anti-explosion groove radially passes through lug boss center.
Preferably, the anti-explosion groove is that notch is wider than slot bottom, slot bottom the isosceles trapezoid slot parallel with lug boss top surface.
Preferably, included angle A is 45-90 ° between two cell walls of the anti-explosion groove.
Preferably, lug boss wall thickness C at anti-explosion groove does not open up the ratio between wall thickness H at anti-explosion groove with lug boss and is
0.2125-0.23:1。
Preferably, the explosion-proof slot length is less than or equal to lobes outside diameter.
Further, the ratio between described explosion-proof slot length L and lobes outside diameter D is 0.7-1:1.
Preferably, the lug boss height is 0.5-3mm.
Preferably, the slot bottom width W of the anti-explosion groove is 0.1-0.5mm.
Beneficial effects of the present invention are：
1. punching press obtains the lug boss of anti-explosion groove at the center of shell bottom, lug boss is alleviated as tympanites primary deformation position
Larger internal pressure, the anti-explosion groove at lug boss center is deformed when internal pressure continues to be increased to pressure threshold value to be torn, and prevents battery from sending out
Raw heavy explosion.
2. cold stamping one-pass molding directly obtains high spot and anti-explosion groove, explosion-proof groove shape is regular, and high spot will not be by
It is influenced, and the machining accuracy of anti-explosion groove is improved under the premise of saving process, energy-efficient.
Description of the drawings
Fig. 1 is inventive shell Sheet Metal Forming Technology schematic diagram
Fig. 2 is that the present invention prepares gained shell upward view
Fig. 3 is A-A sectional views in Fig. 2
Fig. 4 is B-B sectional views in Fig. 2
Wherein：The first recessed portions of mold 6- 7- second is recessed under 1- shell 1.1- body 2- shells bottom 3- lug boss 4- anti-explosion grooves 5-
The trapezoidal radial rib 9- upper molds of concave portion 8-.
Specific implementation mode
The present invention is described in further detail for specific embodiment below.
Embodiment 1
A kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell provided by the invention, the specific steps are：
A. by thickness 0.4-0.7mm, hardness 150-400HV austenite 304DQ stainless steel belts through continuous deep-drawing technique
Integrated molding obtains tubular shell 1, and shell 1 includes circular shell 1.1 and shell bottom 2, by shell 1 through edge notches, cleaning, high temperature
Gu melt processed, it is specially to be quickly cooled to room temperature after stainless steel is heated to 1100 DEG C that high temperature, which consolidates melt processed,；
B. the lug boss 3 with anti-explosion groove 4 is formed through a Sheet Metal Forming Technology axially outwards at 2 center of shell bottom, such as Fig. 1 institutes
Show, the one time punching molded lower mold 5 used includes opening up, inner circumferential the first recess corresponding with 1.1 peripheral shape of shell
Portion 6,6 bottom surface of the first recessed portion is corresponding with shell bottom 2, and 6 bottom surface of the first recessed portion is used to form the second recessed of lug boss 3 to having
Concave portion 7, the trapezoidal radial rib 8 that 7 bottom surface of the second recessed portion is equipped with protrusion upward, is used to form anti-explosion groove 4, trapezoidal radial direction rib 8 push up
Face is not higher than 6 bottom of the first recessed portion；The one time punching molded upper mold 9 used is 3 internal diameter pair of lug boss of outer diameter and design
The cylinder answered.
It is one time punching molded to be：Shell 1 is sheathed in 5 first recessed portion 6 of lower mold, 6 bottom of shell bottom 2 and the first recessed portion
Face coordinates, and is gripped between shell 1 and lower mold 5, and upper mold 9 enters in shell from opening by the punching press outwardly of bottom plate 2, such as schemes
Arrow direction in 1 forms anti-explosion groove 4 while shell bottom 2 is stamped out lug boss 3.The 4 length L of anti-explosion groove that punching press obtains
It is 0.7-1 with the ratio between 3 outer diameter D of lug boss:1, anti-explosion groove 4 is the dovetail groove of opening outwardly, most qualified through pressure, size detection afterwards
After obtain 304 stainless steel explosion-proof casings.
As in Figure 2-4, above-mentioned 304 stainless steel explosion-proof casing concrete structures being prepared are：Including shell 1, shell 1
Including cyclic annular body 1.1 and with 1.1 integrally formed shell bottom 2 of body, lug boss 3 axially outwards is equipped at 2 center of shell bottom,
3 top surface of lug boss is recessed anti-explosion groove 4, and anti-explosion groove 4 is that notch is wider than slot bottom, the slot bottom isosceles parallel with 3 top surface of lug boss
Dovetail groove, 4 liang of cell walls of anti-explosion groove are symmetrically towards outer incline.Lug boss 3, which is that the circle and anti-explosion groove 4 coaxial with shell bottom 2 are radial, to be passed through
3 center of lug boss.Lug boss 3 wall thickness C and lug boss 3 at anti-explosion groove 4 do not open up at anti-explosion groove 4 wall thickness H (herein not for 304
Become rusty steel steel band original thickness) the ratio between be 0.2125-0.23:1.4 liang of cell walls of anti-explosion groove are symmetrically towards outer incline, angle X between two cell walls
It it is 45-90 °, the slot bottom width W of anti-explosion groove 4 is 0.1-0.5mm.3 height of lug boss is 0.5-3mm, and raised top surface is shell diameter
To plane.
In the present embodiment：
Raw material 304 stainless steel belt thickness 0.4mm, hardness 150HV；
Length L and outer diameter D=0.7:1；
Thickness ratio C：H=0.2125, i.e. H=0.4mm, thickness C=0.085mm；
X=60 ° of angle
Width W=0.3mm
3 height h of lug boss is 0.5mm.
304 stainless steel explosion-proof casing preparation methods of embodiment 2-8 lithium thionyl chloride cells are identical with embodiment 1,
Structure is identical, variant in size, 304 stainless steel explosion-proof casing sizes such as the following table 1 institute that embodiment 1-8 is prepared
Show.
The 304 stainless steel explosion-proof casing sizes that 1 embodiment 1-8 of table is prepared
Performance test
Shell obtained by embodiment 1-8 is subjected to blow-off pressure test, test result is as follows shown in table 2.
Shell blow-off pressure test result obtained by 2 embodiment 1-8 of table
It can be obtained from above-mentioned table 2, all of above shell Opening pressure being prepared is satisfied by requirement of explosion proof, Er Qiejun
Rule is split from anti-explosion groove, meets the demand of battery security.
Claims (10)
1. a kind of 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell, which is characterized in that in tubular shell (1)
Shell bottom (2) center at carry out axially outwards it is one time punching molded, formed with anti-explosion groove (4) lug boss (3), it is described explosion-proof
The ratio between slot (4) length L and lug boss (3) outer diameter D are 0.7-1:1, the anti-explosion groove (4) is the dovetail groove of opening outwardly, detection
304 stainless steel explosion-proof casings are obtained after qualification.
2. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as described in claim 1, which is characterized in that
The one time punching molded lower mold (5) used includes that opening up, inner circumferential is corresponding with shell (1) peripheral shape first recessed
Concave portion (6), the first recessed portion (6) bottom surface is corresponding with shell bottom (2), and the first recessed portion (6) bottom surface is used for having
Formed lug boss (3) the second recessed portion (7), the second recessed portion (7) bottom surface be equipped with upward protrusion, be used to form anti-explosion groove
(4) trapezoidal radial rib (8)；The one time punching molded upper mold (9) used is outer diameter cylinder corresponding with lug boss (3) internal diameter
Body.
3. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as claimed in claim 2, which is characterized in that
It is described one time punching molded to be：Shell (1) is sheathed in (5) first recessed portion (6) of lower mold, shell bottom (2) and the first recess
Portion (6) bottom surface, for the upper mold (9) downwardly toward shell bottom (2) punching press, forming outer surface has the lug boss of anti-explosion groove (4)
(3)。
4. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as described in claim 1, which is characterized in that
The shell (1) by thickness 0.4-0.7mm, hardness 150-400HV 304 stainless steel belts through continuous deep-drawing technique one at
Type, then consolidate melt processed through edge notches, cleaning, high temperature and obtain.
5. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as described in claim 1, which is characterized in that
The lug boss (3) is the circle coaxial with shell bottom (2) and anti-explosion groove (4) radially passes through lug boss (3) center.
6. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as described in claim 1, which is characterized in that
It is 0.2125- that the lug boss (3) wall thickness C and lug boss (3) at anti-explosion groove (4), which do not open up the ratio between wall thickness H at anti-explosion groove (4),
0.23:1。
7. 304 stainless steel explosion-proof casing preparation methods of lithium thionyl chloride cell as described in claim 1, which is characterized in that
The anti-explosion groove (4) is wider than the isosceles trapezoid slot of slot bottom for notch, and angle X is 45-90 ° between two cell walls of the anti-explosion groove (4),
The slot bottom width W of the anti-explosion groove (4) is 0.1-0.5mm.
8. in a kind of 1-7 such as claim made from 304 stainless steel explosion-proof casing preparation methods of any lithium thionyl chloride cell
304 stainless steel explosion-proof casings, including shell (1), which is characterized in that the shell (1) includes cyclic annular body (1.1) and and shell
Body (1.1) integrally formed shell bottom (2) is equipped with lug boss (3) axially outwards, the lug boss at shell bottom (2) center
(3) top surface is recessed anti-explosion groove (4), and the anti-explosion groove (4) is the dovetail groove of opening outwardly.
9. 304 stainless steel explosion-proof casings of lithium thionyl chloride cell as claimed in claim 8, which is characterized in that the protrusion
Portion (3) is the circle coaxial with shell bottom (2) and anti-explosion groove (4) radially passes through lug boss (3) center.
10. 304 stainless steel explosion-proof casings of lithium thionyl chloride cell as claimed in claim 8, which is characterized in that described explosion-proof
Slot (4) is that notch is wider than slot bottom, slot bottom the isosceles trapezoid slot parallel with lug boss (3) top surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810344568.3A CN108500106B (en) | 2018-04-17 | 2018-04-17 | Preparation method of 304 stainless steel explosion-proof shell of lithium thionyl chloride battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810344568.3A CN108500106B (en) | 2018-04-17 | 2018-04-17 | Preparation method of 304 stainless steel explosion-proof shell of lithium thionyl chloride battery |
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| CN108500106B CN108500106B (en) | 2024-02-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109746318A (en) * | 2019-01-22 | 2019-05-14 | 浙江锦泰电子有限公司 | The manufacturing method of explosion rupture disk |
| CN110429214A (en) * | 2019-08-07 | 2019-11-08 | 宁德时代新能源科技股份有限公司 | Cap assembly for secondary battery and secondary battery |
| CN112719011A (en) * | 2020-12-15 | 2021-04-30 | 重庆伟汉汽车部件有限公司 | Forming process for positioning and mounting convex hull on electric control booster shell |
| CN114242462A (en) * | 2021-12-27 | 2022-03-25 | 江苏奥星电子有限公司 | Integrally-formed explosion-proof aluminum shell extrusion die and forming process thereof |
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| CN109746318A (en) * | 2019-01-22 | 2019-05-14 | 浙江锦泰电子有限公司 | The manufacturing method of explosion rupture disk |
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| CN110429214A (en) * | 2019-08-07 | 2019-11-08 | 宁德时代新能源科技股份有限公司 | Cap assembly for secondary battery and secondary battery |
| US11637348B2 (en) | 2019-08-07 | 2023-04-25 | Contemporary Amperex Technology Co., Limited | Cover assembly of secondary battery and secondary battery |
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