CN112072007A - Metal round button cell and sealing method thereof - Google Patents
Metal round button cell and sealing method thereof Download PDFInfo
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- CN112072007A CN112072007A CN202011030584.9A CN202011030584A CN112072007A CN 112072007 A CN112072007 A CN 112072007A CN 202011030584 A CN202011030584 A CN 202011030584A CN 112072007 A CN112072007 A CN 112072007A
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- button cell
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- liquid injection
- aluminum sheet
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 122
- 239000002184 metal Substances 0.000 title claims abstract description 122
- 238000007789 sealing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 66
- 238000002347 injection Methods 0.000 claims abstract description 65
- 239000007924 injection Substances 0.000 claims abstract description 65
- 239000003792 electrolyte Substances 0.000 claims abstract description 47
- 238000004880 explosion Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 66
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 66
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- -1 polytetrafluoroethylene Polymers 0.000 claims description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000005030 aluminium foil Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000006378 damage Effects 0.000 claims description 6
- 208000027418 Wounds and injury Diseases 0.000 claims description 5
- 208000014674 injury Diseases 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 34
- 239000000463 material Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- OTCVAHKKMMUFAY-UHFFFAOYSA-N oxosilver Chemical compound [Ag]=O OTCVAHKKMMUFAY-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Substances [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a metal circular button cell and a sealing method thereof, and the metal circular button cell comprises a metal circular button cell shell and an outer anti-explosion nickel sheet, wherein the upper side of the metal circular button cell shell is welded and connected with a metal circular button cell cover cap, the middle part of the metal circular button cell cover cap is welded and connected with an inner anti-explosion nickel sheet, and a liquid injection hole is formed in the metal circular button cell cover cap. This circular button cell of metal and method of sealing, reserve the notes liquid hole that a diameter is 1.2mm on the circular button cell block of metal, directly utilize laser welding's mode to carry out seal weld to circular button cell block of metal cap and the circular button cell shell of metal, later stage only need directly utilize notes liquid hole alright pour into the mould electrolyte, and can be according to the battery model, annotate the liquid volume size, annotate liquid many times, let electrolyte fully soak, let electrolyte fully absorbed by electric core, the assembly of quick realization battery, and can not cause the influence to the pouring of electrolyte.
Description
Technical Field
The invention relates to the technical field related to metal round button cells, in particular to a metal round button cell and a sealing method thereof.
Background
The metal round button cell is a button cell frequently used in the market, the shape, appearance and size of the cell are similar to a button, the cell has the characteristics of larger diameter and thinner thickness, the cell is often used as a backup power source of various electronic products, the button cell is various, the cell can be divided into a silver oxide cell, a lithium cell, an alkaline manganese cell and the like according to the used materials, the advantages and the disadvantages of the button cell prepared from different materials have certain difference, the button cell which is more suitable can be selected according to different using equipment, the advantages of the button cell are utilized to the maximum extent, the chemical cell as one type of the button cell comprises an anode, namely a positive electrode, a cathode, namely a negative electrode, electrolyte and the like, the appearance is made of stainless steel materials, the negative electrode is a stainless steel round cover, a sealing ring is arranged between the positive electrode and the negative electrode for insulation, and the sealing ring is made of nylon, the sealing ring can not only play an insulating role, but also prevent the electrolyte from leaking, and is the most commonly used button cell.
However, the chemistry class battery among the current button cell still has the weak point in the in-process that uses, seal the battery block and with the battery block with the battery equipment after finishing, can not pour electrolyte as required, and pour electrolyte earlier and seal the equipment again, can make and seal the equipment process operation inconvenient, and be not good the pouring volume of accuse electrolyte, can not further strengthen the explosion-proof safeguard function of battery, if the battery appears exploding the phenomenon of splitting, can not enclose the fender to the burst piece, can not alleviate the injury that causes equipment and user.
Therefore, we propose a metal circular button cell and a sealing method thereof to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a metal circular button cell and a sealing method thereof, and aims to solve the problems that the chemical battery in the existing button cell in the market at present is inconvenient to adjust the relation between sealing and electrolyte pouring, the battery sealing difficulty is increased, and the explosion-proof protection function of the battery cannot be further enhanced, which are provided by the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a circular metal button cell comprises a circular metal button cell shell and an outer explosion-proof nickel sheet, wherein the upper side of the circular metal button cell shell is welded and connected with a circular metal button cell cap, the middle of the circular metal button cell cap is welded and connected with an inner explosion-proof nickel sheet, a liquid injection hole is formed in the circular metal button cell cap, a steel ball is mounted on the inner side of the liquid injection hole, the outer explosion-proof nickel sheet is welded and connected to the outer side of the circular metal button cell cap, a groove is formed in the inner portion of the circular metal button cell cap, an exhaust hole is connected above the groove and formed in the inner portion of the circular metal button cell cap, a sealing baffle is arranged on the inner side of the exhaust hole in a laminating mode, a connecting rod is welded and connected to the lower side of the sealing baffle and penetrates through the inner portion of a containing groove, and the containing groove is formed in the inner portion of the outer explosion-, the connecting rod is connected with the accommodating groove through a compression spring.
Preferably, the circular button cell cap of metal includes first aluminum sheet and second aluminum sheet, and the upside welded connection of first aluminum sheet has the second aluminum sheet to the external diameter of second aluminum sheet is greater than the external diameter of first aluminum sheet.
Preferably, the inner explosion-proof nickel sheet sequentially penetrates through the second aluminum sheet and the first aluminum sheet from top to bottom, and the sum of the thicknesses of the inner explosion-proof nickel sheet, the second aluminum sheet and the first aluminum sheet is 0.8 mm.
Preferably, annotate the liquid hole including modified PP layer, interior adhesive linkage, aluminium foil, outer adhesive linkage and polytetrafluoroethylene thin layer, and modified PP layer, interior adhesive linkage, aluminium foil, outer adhesive linkage and polytetrafluoroethylene thin layer distribute in proper order from inside to outside to through outer adhesive linkage interconnect between modified PP layer and the aluminium foil, connect through outer adhesive linkage between aluminium foil and the polytetrafluoroethylene thin layer simultaneously.
Preferably, the steel ball and the liquid injection hole are in interference fit, the diameter of the liquid injection hole is 1.2mm, and the diameter of the steel ball is 1.2 mm.
Preferably, the main section of the sealing baffle is of an inverted convex structure, the sealing baffle is tightly attached to the exhaust hole, the upper end surface of the inner side of the exhaust hole is distributed in an inclined manner, and the inner diameter of the upper end surface of the inner side of the exhaust hole is sequentially increased from bottom to top.
Preferably, the connecting rods are distributed at equal angles relative to the center point of the sealing baffle, the main section of each connecting rod is of an inverted T-shaped structure, and the connecting rods and the outer anti-explosion nickel sheet form an elastic structure through compression springs.
Preferably, the interior of the groove is communicated with the interior of the exhaust hole, the highest point of the groove is higher than that of the inner explosion-proof nickel sheet, and the vertical center line of the exhaust hole is overlapped with that of the sealing baffle plate.
The invention provides another technical scheme for providing a sealing method of a metal round button cell, which comprises the following steps:
s1: insulating the first aluminum sheet, the second aluminum sheet and the inner explosion-proof nickel sheet by injecting and filling PP glue to form a metal circular button cell cap;
s2: tightly attaching a circular metal button cell cap consisting of a first aluminum sheet, a second aluminum sheet and an inner explosion-proof nickel sheet to a circular metal button cell shell, and hermetically welding the circular metal button cell cap and the circular metal button cell shell in a laser welding manner to complete the assembly of the cell;
s3: a liquid injection hole with the diameter of 1.2mm is reserved on the metal circular button cell cap, after the metal circular button cell cap and the metal circular button cell shell are subjected to laser welding, the reserved liquid injection hole is used for injecting liquid, in order to ensure that electrolyte is fully absorbed by a cell, the liquid injection is carried out for multiple times according to the type of the cell and the injection amount, and the electrolyte is fully immersed;
s4: the reserved liquid injection hole has heat entering from the liquid injection hole during baking, so that the volatilization of water is accelerated, the gas is conveniently discharged during the formation of the battery, the gas generated during the formation of the battery can be timely discharged during the later shaping and steel ball sealing, and the formed gas is prevented from carrying part of electrolyte out when being extruded;
s5: the steel ball is rust-resistant and electrolyte corrosion-resistant, the total thickness of the nickel sheet and the aluminum sheet is about 0.8mm, in order to achieve the best sealing performance, the fit of the steel ball and the metal circular button cell cap is interference fit, the diameter of the steel ball is about 1.2mm, and through calculation, when in the best sealing state, the steel ball is about 0.4mm in the middle part of the metal circular button cell cap, the exposed size of the lower part of the metal circular button cell cap is 0.35mm, and the steel ball cannot interfere with a winding core;
s6: the modified PP layer, the inner bonding layer, the aluminum foil, the outer bonding layer and the polytetrafluoroethylene film layer are sequentially distributed on the liquid injection hole from inside to outside, so that the liquid injection hole can be prevented from being corroded by electrolyte, the shape characteristic of the liquid injection hole is ensured, the liquid injection hole and the steel ball can be matched to the maximum extent, and sealing is realized;
s7: interior explosion-proof nickel piece carries out the one-level explosion-proof to the battery, and outer explosion-proof nickel piece carries out the second grade explosion-proof to the battery, utilizes outer explosion-proof nickel piece to enclose the fender to the piece that bursts, avoids the piece to splash to the use of the regulation formula seal structure that cooperation sealing baffle, connecting rod and compression spring constitute carries out the pressure release to too high atmospheric pressure and explosion air current, avoids outer explosion-proof nickel piece to burst once more, and reduces the injury that the battery explosion led to the fact equipment and human body.
Compared with the prior art, the invention has the beneficial effects that: the metal round button cell and the sealing method thereof,
(1) a liquid injection hole with the diameter of 1.2mm is reserved on the circular metal button cell cap, the circular metal button cell cap and the circular metal button cell shell are sealed and welded by directly utilizing a laser welding mode, electrolyte can be poured in later period only by directly utilizing the liquid injection hole, and the electrolyte can be injected for many times according to the type of the cell and the size of the liquid injection amount, so that the electrolyte is fully immersed, the electrolyte is fully absorbed by the cell core, the assembly of the cell is rapidly realized, and the pouring of the electrolyte is not influenced;
(2) the steel balls are installed in the liquid injection holes in an interference fit installation mode, so that the sealing of the liquid injection holes is realized, the sealing of the battery cap is realized, the operation is simple and convenient, the cost is low, heat can enter the battery from the reserved liquid injection holes before the battery cap is not sealed, the formation of the battery is accelerated, gas generated in the formation period of the battery is discharged in time, and the battery preparation efficiency is improved;
(3) interior explosion-proof nickel piece and outer explosion-proof nickel piece constitute the explosion-proof mechanism of battery, interior explosion-proof nickel piece carries out the one-level explosion-proof to the battery, outer explosion-proof nickel piece carries out the second grade explosion-proof to the battery, utilize outer explosion-proof nickel piece to enclose the fender to exploding the piece of splitting when one-level explosion-proof structure explodes, avoid the piece to splash, and cooperation sealing baffle, the use of the regulation formula seal structure that connecting rod and compression spring constitute, carry out the pressure release to too high atmospheric pressure and explosion air current, avoid outer explosion-proof nickel piece to explode once more and split, and reduce the injury that the battery explosion led to the fact equipment and human body, the security that improves the battery and use.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic perspective view of the junction between the metal circular button cell case and the metal circular button cell cap according to the present invention;
fig. 3 is a schematic view of the bottom structure of the metal round button cell cap of the present invention;
FIG. 4 is a schematic diagram of the main cross-sectional structure of the cap of the metal round button cell of the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention;
FIG. 6 is a schematic view of the internal structure of the pour hole of the present invention.
In the figure: 1. a metal circular button cell housing; 2. a metal circular button cell cap; 201. a first aluminum sheet; 202. a second aluminum sheet; 3. an inner explosion-proof nickel sheet; 4. a liquid injection hole; 401. a modified PP layer; 402. an inner adhesive layer; 403. aluminum foil; 404. an outer adhesive layer; 405. a polytetrafluoroethylene film layer; 5. steel balls; 6. an outer explosion-proof nickel sheet; 7. sealing the baffle; 8. an exhaust hole; 9. a receiving groove; 10. a connecting rod; 11. a compression spring; 12. and (4) a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a round button cell of metal and its sealing method, including the round button cell outer casing of metal 1, round button cell cap of metal 2, first aluminum sheet 201, the second aluminum sheet 202, the explosion-proof nickel sheet 3 of the inside, annotate the liquid hole 4, the modified PP layer 401, the inner adhesive linkage 402, the aluminium foil 403, the outer adhesive linkage 404, the polytetrafluoroethylene membrane layer 405, the steel ball 5, the explosion-proof nickel sheet 6 of the outside, the seal baffle 7, the air vent 8, accommodate the trough 9, the tie rod 10, the compression spring 11 and groove 12, the upside of the round button cell outer casing of metal 1 is welded and connected with the round button cell cap of metal 2, and the middle part of the round button cell cap of metal 2 is welded and connected with the explosion-proof nickel sheet 3 of the inside, the circular button cell cap of metal 2 is equipped with annotates the liquid hole 4 inside, and annotate the inboard of the liquid hole 4 and install the steel ball 5, the explosion-proof nickel sheet 6, and the inside of the circular button cell cap 2 of metal has been seted up flutedly 12, the top of recess 12 is connected with exhaust hole 8, and exhaust hole 8 is seted up in the inside of the circular button cell cap 2 of metal, the inboard laminating of exhaust hole 8 is provided with sealing baffle 7, and sealing baffle 7's downside welded connection has connecting rod 10, connecting rod 10 runs through in the inside of accomodating groove 9, and accomodate the inside that groove 9 was seted up at outer explosion-proof nickel piece 6, connecting rod 10 is connected with accomodating groove 9 through compression spring 11.
In this example, the metal circular button cell cap 2 comprises a first aluminum sheet 201 and a second aluminum sheet 202, the upper side of the first aluminum sheet 201 is welded with the second aluminum sheet 202, and the outer diameter of the second aluminum sheet 202 is larger than that of the first aluminum sheet 201, so that the first aluminum sheet 201 and the second aluminum sheet 202 can represent the positive and negative electrodes of the battery core, and the assembly of the positive and negative electrodes can be conveniently controlled during the assembly of the battery;
the inner explosion-proof nickel sheet 3 sequentially penetrates through the second aluminum sheet 202 and the first aluminum sheet 201 from top to bottom, and the sum of the thicknesses of the inner explosion-proof nickel sheet 3, the second aluminum sheet 202 and the first aluminum sheet 201 is 0.8mm, so that the explosion-proof function of the battery can be realized, and the explosion phenomenon when the battery is overcharged and overdischarged is avoided;
the liquid injection hole 4 comprises a modified PP layer 401, an inner bonding layer 402, an aluminum foil 403, an outer bonding layer 404 and a polytetrafluoroethylene film layer 405, the modified PP layer 401, the inner bonding layer 402, the aluminum foil 403, the outer bonding layer 404 and the polytetrafluoroethylene film layer 405 are sequentially distributed from inside to outside, the modified PP layer 401 and the aluminum foil 403 are connected with each other through the outer bonding layer 404, and meanwhile the aluminum foil 403 and the polytetrafluoroethylene film layer 405 are connected through the outer bonding layer 404, so that the liquid injection hole 4 has electrolyte corrosion resistance, and the phenomenon that the shape characteristics of the liquid injection hole 4 are changed due to the fact that electrolyte corrodes the liquid injection hole 4 is avoided;
the steel ball 5 and the liquid injection hole 4 are in interference fit, the diameter of the liquid injection hole 4 is 1.2mm, and the diameter of the steel ball 5 is 1.2mm, so that the design can ensure that the sealing performance between the liquid injection hole 4 and the steel ball 5 can achieve the best effect;
the main section of the sealing baffle 7 is of an inverted convex structure, the sealing baffle 7 is tightly attached to the exhaust hole 8, the upper end surface of the inner side of the exhaust hole 8 is distributed in an inclined manner, and the inner diameter of the upper end surface of the inner side of the exhaust hole 8 is sequentially increased from bottom to top at the same time, so that the sealing baffle 7 can seal the exhaust hole 8, and a gap can exist between the sealing baffle 7 and the exhaust hole 8 after the sealing baffle 7 moves upwards for a certain distance;
the connecting rods 10 are distributed at equal angles relative to the center point of the sealing baffle 7, the main section of each connecting rod 10 is of an inverted T-shaped structure, the connecting rods 10 and the outer anti-explosion nickel sheet 6 form an elastic structure through the compression springs 11, and the design avoids the connecting rods 10 from being connected with the outer anti-explosion nickel sheet 6, so that the sealing baffle 7 is prevented from being connected with the outer anti-explosion nickel sheet 6;
the interior of the groove 12 is communicated with the interior of the exhaust hole 8, the highest point of the groove 12 is higher than that of the inner explosion-proof nickel sheet 3, and the vertical center line of the exhaust hole 8 is coincident with that of the sealing baffle 7, so that the design can discharge air flow, the air flow is discharged from the exhaust hole 8, and the pressure relief is realized;
in order to better show the specific sealing method of the metal circular button cell, the sealing method of the metal circular button cell in the embodiment comprises the following steps:
the first step is as follows: insulating the first aluminum sheet 201, the second aluminum sheet 202 and the inner explosion-proof nickel sheet 3 by injecting and filling PP glue to form a metal circular button cell cap 2;
the second step is that: tightly attaching a circular metal button cell cap 2 consisting of a first aluminum sheet 201, a second aluminum sheet 202 and an inner explosion-proof nickel sheet 3 to a circular metal button cell shell 1, and hermetically welding the circular metal button cell cap 2 and the circular metal button cell shell 1 in a laser welding manner to complete the assembly of the cell;
the third step: a liquid injection hole 4 with the diameter of 1.2mm is reserved on the circular metal button cell cap 2, after the circular metal button cell cap 2 and the circular metal button cell shell 1 are subjected to laser welding, the reserved liquid injection hole 4 is used for injecting liquid, in order to ensure that electrolyte is fully absorbed by a cell, the liquid injection is carried out for multiple times according to the type and the injection amount of the cell, so that the electrolyte is fully immersed;
the fourth step: the reserved liquid injection hole 4 has the advantages that heat enters from the liquid injection hole 4 when being baked, the volatilization of water is accelerated, the gas is conveniently discharged when the battery is formed, in order to timely discharge the gas generated in the battery forming period when the steel ball 5 is shaped and sealed in the later period, and the generated gas is prevented from being extruded to carry part of electrolyte;
the fifth step: the steel ball 5 is rust-proof and electrolyte corrosion-resistant, the total thickness of the nickel sheet and the aluminum sheet is about 0.8mm, in order to achieve the best sealing performance, the steel ball 5 is in interference fit with the circular metal button cell cap 2, the diameter of the steel ball 5 is about 1.2mm, and through calculation, when in the best sealing state, the steel ball 5 is about 0.4mm in the middle part of the circular metal button cell cap 2, the exposed size of the lower part of the circular metal button cell cap 2 is 0.35mm, and the circular metal button cell cap cannot interfere with a winding core;
and a sixth step: the modified PP layer 401, the inner bonding layer 402, the aluminum foil 403, the outer bonding layer 404 and the polytetrafluoroethylene film layer 405 are sequentially distributed on the liquid injection hole 4 from inside to outside, so that the electrolyte corrosion at the liquid injection hole 4 can be prevented, the shape characteristic of the liquid injection hole 4 is ensured, the liquid injection hole 4 and the steel ball 5 can be matched to the maximum extent, and the sealing is realized;
the seventh step: interior explosion-proof nickel piece 3 carries out the one-level explosion-proof to the battery, outer explosion-proof nickel piece 6 carries out the second grade explosion-proof to the battery, utilize outer explosion-proof nickel piece 6 to enclose the fender to exploding the piece of splitting, avoid the piece to splash, and cooperation sealing baffle 7, the use of the regulation formula seal structure that connecting rod 10 and compression spring 11 are constituteed, carry out the pressure release to too high atmospheric pressure and explosion air current, avoid outer explosion-proof nickel piece 6 to explode once more and split, and reduce the injury that the battery explosion led to the fact equipment and human body.
The working principle is as follows: when the metal round button cell and the sealing method thereof are used, firstly, a user firstly assembles a metal round button cell shell 1 and a metal round button cell cap 2, the metal round button cell cap 2 consists of a first aluminum sheet 201, a second aluminum sheet 202 and an inner anti-explosion nickel sheet 3, the first aluminum sheet 201, the second aluminum sheet 202 and the inner explosion-proof nickel sheet 3 are insulated by filling PP glue through injection molding, then the metal round button cell cap 2 composed of the first aluminum sheet 201, the second aluminum sheet 202 and the inner explosion-proof nickel sheet 3 can be tightly attached to the metal round button cell shell 1, and the sealed welding between the metal circular button cell cap 2 and the metal circular button cell casing 1 is realized by laser welding, the whole device is shown in figures 1-2, at this time, the assembly of the metal circular button cell cap 2 and the metal circular button cell shell 1 is completed;
a liquid injection hole 4 with the diameter of 1.2mm is reserved on a metal circular button cell cover cap 2, after the metal circular button cell cover cap 2 and a metal circular button cell shell 1 are welded by laser, electrolyte can be injected by the liquid injection hole 4, the cell is horizontally placed in a processing area, the electrolyte is injected into the metal circular button cell shell 1 from the liquid injection hole 4, the liquid injection is carried out for multiple times according to the cell model, the electrolyte is fully immersed, so that the cell in the metal circular button cell shell 1 fully absorbs the electrolyte, the pouring amount of the electrolyte is more conveniently controlled, and when the reserved liquid injection hole 4 is used for baking the cell, heat can enter the cell from the small hole, the volatilization of moisture is accelerated, the gas is conveniently discharged during formation, and the gas generated during the formation of the cell can be timely discharged during the later shaping steel sealing ball 5, the gas generated by formation is prevented from being extruded out to carry part of electrolyte, after the formation of the battery is finished, the steel ball 5 can be assembled into the electrolyte injection hole 4 in an interference fit mode, the steel ball 5 has the characteristics of rust prevention and electrolyte corrosion resistance, the sealing tightness of the electrolyte injection hole 4 can achieve the best effect by utilizing the interference fit mode of the steel ball 5 and the electrolyte injection hole 4, the sealing of the battery is integrally realized, the electrolyte injection hole 4 is sequentially provided with a modified PP layer 401, an inner bonding layer 402, an aluminum foil 403, an outer bonding layer 404 and a polytetrafluoroethylene film layer 405 from inside to outside, the electrolyte corrosion can be prevented at the electrolyte injection hole 4, the shape characteristic of the electrolyte injection hole 4 is ensured, the electrolyte injection hole 4 and the steel ball 5 can be matched to the maximum extent, and the sealing is realized;
as shown in fig. 4-5, an outer explosion-proof nickel plate 6 is welded to the outer side of the circular metal button cell cap 2, an inner explosion-proof nickel plate 3 disposed in the middle of the circular metal button cell cap 2 can perform primary explosion-proof to the cell to prevent the cell from exploding when overcharged and overdischarged, the outer explosion-proof nickel plate 6 can perform secondary explosion-proof to the cell, when the cell explodes to cause the inner explosion-proof nickel plate 3 to crack, the outer explosion-proof nickel plate 6 can block the cracked fragments to avoid fragment splashing, and the air flow generated by explosion can push the sealing baffle 7, the sealing baffle 7 moves away from the vent hole 8, at this time, the sealing baffle 7 pulls the connecting rod 10 to press the compression spring 11 to move, the sealing enclosure of the vent hole 8 by the side edge of the sealing baffle 7 is released, so that the excessive air pressure and explosion air flow are discharged from the side of the vent hole 8, the pressure relief is realized, the secondary explosion of the outer explosion-proof nickel sheet 6 is avoided, the damage to equipment and a human body caused by battery explosion can be reduced by the design, and the whole working process is realized.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a circular button cell of metal, includes circular button cell shell of metal (1) and outer explosion-proof nickel piece (6), its characterized in that: the metal round button cell is characterized in that a metal round button cell cover cap (2) is welded on the upper side of a metal round button cell shell (1), an inner explosion-proof nickel sheet (3) is welded in the middle of the metal round button cell cover cap (2), a liquid injection hole (4) is formed in the metal round button cell cover cap (2), a steel ball (5) is mounted on the inner side of the liquid injection hole (4), an outer explosion-proof nickel sheet (6) is welded on the outer side of the metal round button cell cover cap (2), a groove (12) is formed in the metal round button cell cover cap (2), an exhaust hole (8) is connected to the upper side of the groove (12), the exhaust hole (8) is formed in the metal round button cell cover cap (2), a sealing baffle (7) is attached to the inner side of the exhaust hole (8), and a connecting rod (10) is welded on the lower side of the sealing baffle (7), the connecting rod (10) penetrates through the inside of the accommodating groove (9), the accommodating groove (9) is formed in the outer explosion-proof nickel sheet (6), and the connecting rod (10) is connected with the accommodating groove (9) through a compression spring (11).
2. The metal round button cell according to claim 1, characterized in that: the circular button cell cap (2) of metal includes first aluminum sheet (201) and second aluminum sheet (202), and the upside welded connection of first aluminum sheet (201) has second aluminum sheet (202) to the external diameter of second aluminum sheet (202) is greater than the external diameter of first aluminum sheet (201).
3. The metal round button cell according to claim 2, characterized in that: interior explosion-proof nickel piece (3) from last to running through second aluminum sheet (202) and first aluminum sheet (201) down in proper order, and interior explosion-proof nickel piece (3) and the sum of the thickness of second aluminum sheet (202) and first aluminum sheet (201) is 0.8 mm.
4. The metal round button cell according to claim 1, characterized in that: annotate liquid hole (4) including modified PP layer (401), interior adhesive linkage (402), aluminium foil (403), outer adhesive linkage (404) and polytetrafluoroethylene thin layer (405), and modified PP layer (401), interior adhesive linkage (402), aluminium foil (403), outer adhesive linkage (404) and polytetrafluoroethylene thin layer (405) distribute from inside to outside in proper order, and through outer adhesive linkage (404) interconnect between modified PP layer (401) and aluminium foil (403), connect through outer adhesive linkage (404) between aluminium foil (403) and the polytetrafluoroethylene thin layer (405) simultaneously.
5. The metal round button cell according to claim 1, characterized in that: the steel ball (5) and the liquid injection hole (4) are in interference fit, the diameter of the liquid injection hole (4) is 1.2mm, and the diameter of the steel ball (5) is 1.2 mm.
6. The metal round button cell according to claim 1, characterized in that: the main section of sealing baffle (7) is for "protruding" shape structure of falling, and sealing baffle (7) and exhaust hole (8) closely laminate to the upper end of exhaust hole (8) inboard is the slope form and distributes, and the internal diameter of the inboard up end of exhaust hole (8) increases from supreme down in proper order simultaneously.
7. The metal round button cell according to claim 1, characterized in that: the connecting rods (10) are distributed at equal angles relative to the center point of the sealing baffle (7), the main section of each connecting rod (10) is of an inverted T-shaped structure, and the connecting rods (10) and the outer anti-explosion nickel sheet (6) form an elastic structure through compression springs (11).
8. The metal round button cell according to claim 1, characterized in that: the interior of the groove (12) is communicated with the interior of the exhaust hole (8), the highest point of the groove (12) is higher than that of the inner explosion-proof nickel sheet (3), and the vertical center line of the exhaust hole (8) is overlapped with that of the sealing baffle plate (7).
9. A method for sealing a metal round button cell is characterized in that: the sealing method comprises the following steps:
s1: PP glue is filled among the first aluminum sheet (201), the second aluminum sheet (202) and the inner explosion-proof nickel sheet (3) for insulation to form a metal circular button cell cap (2);
s2: tightly attaching a circular metal button cell cap (2) consisting of a first aluminum sheet (201), a second aluminum sheet (202) and an inner explosion-proof nickel sheet (3) to a circular metal button cell shell (1), and hermetically welding the circular metal button cell cap (2) and the circular metal button cell shell (1) in a laser welding manner to complete the assembly of the cell;
s3: a liquid injection hole (4) with the diameter of 1.2mm is reserved on the circular metal button cell cap (2), after the circular metal button cell cap (2) and the circular metal button cell shell (1) are subjected to laser welding, the reserved liquid injection hole (4) is used for injecting liquid, in order to ensure that electrolyte is fully absorbed by a cell, the liquid injection is carried out for multiple times according to the type and the injection amount of the cell, and the electrolyte is fully immersed;
s4: the reserved liquid injection hole (4) has heat entering from the liquid injection hole (4) during baking, so that the volatilization of water is accelerated, the gas is conveniently discharged during the formation of the battery, the gas generated during the formation of the battery can be timely discharged during the later shaping of the steel sealing ball (5), and the formed gas is prevented from being extruded out with partial electrolyte;
s5: the steel ball (5) is rust-proof and electrolyte corrosion-resistant, the total thickness of the nickel sheet and the aluminum sheet is about 0.8mm, in order to achieve the best sealing performance, the steel ball (5) and the circular metal button cell cap (2) are in interference fit, the diameter of the steel ball (5) is about 1.2mm, and through calculation, when in the best sealing state, the steel ball (5) is about 0.4mm in the middle part of the circular metal button cell cap (2), the exposed size of the lower part of the circular metal button cell cap (2) is 0.35mm, and the circular metal button cell cap cannot interfere with a winding core;
s6: the modified PP layer (401), the inner bonding layer (402), the aluminum foil (403), the outer bonding layer (404) and the polytetrafluoroethylene film layer (405) are sequentially distributed on the liquid injection hole (4) from inside to outside, so that the liquid injection hole (4) can be prevented from being corroded by electrolyte, the shape characteristic of the liquid injection hole (4) is ensured, the liquid injection hole (4) can be matched with the steel ball (5) to the maximum extent, and sealing is realized;
s7: interior explosion-proof nickel piece (3) carry out the one-level explosion-proof to the battery, outer explosion-proof nickel piece (6) carry out the second grade explosion-proof to the battery, utilize outer explosion-proof nickel piece (6) to enclose the fender to exploding the piece of splitting, avoid the piece to splash, and cooperation sealing baffle (7), the use of the regulation formula seal structure of connecting rod (10) and compression spring (11) constitution, carry out the pressure release to too high atmospheric pressure and explosion air current, avoid outer explosion-proof nickel piece (6) to explode once more and split, and reduce the injury that the battery explosion caused equipment and human body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030584.9A CN112072007A (en) | 2020-09-27 | 2020-09-27 | Metal round button cell and sealing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030584.9A CN112072007A (en) | 2020-09-27 | 2020-09-27 | Metal round button cell and sealing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112072007A true CN112072007A (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011030584.9A Withdrawn CN112072007A (en) | 2020-09-27 | 2020-09-27 | Metal round button cell and sealing method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN112072007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649651A (en) * | 2022-03-04 | 2022-06-21 | 广东维都利新能源有限公司 | Battery welded without electrode lug and preparation method |
| WO2023185830A1 (en) * | 2022-03-30 | 2023-10-05 | 陕西奥林波斯电力能源有限责任公司 | Battery housing, cell, and high-capacity battery |
-
2020
- 2020-09-27 CN CN202011030584.9A patent/CN112072007A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649651A (en) * | 2022-03-04 | 2022-06-21 | 广东维都利新能源有限公司 | Battery welded without electrode lug and preparation method |
| WO2023185830A1 (en) * | 2022-03-30 | 2023-10-05 | 陕西奥林波斯电力能源有限责任公司 | Battery housing, cell, and high-capacity battery |
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Application publication date: 20201211 |