CN211789226U - Laminated cell button battery with inner shell explosion-proof structure - Google Patents
Laminated cell button battery with inner shell explosion-proof structure Download PDFInfo
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- CN211789226U CN211789226U CN202020785406.6U CN202020785406U CN211789226U CN 211789226 U CN211789226 U CN 211789226U CN 202020785406 U CN202020785406 U CN 202020785406U CN 211789226 U CN211789226 U CN 211789226U
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- 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
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Abstract
The utility model provides a lamination electricity core button cell with inner shell explosion-proof structure, it includes inner metal shell, outer metal shell, insulating rubber ring, lamination electricity core and the explosion-proof apron of inner shell, is provided with inner shell holding tank and inner shell through-hole on the outside terminal surface of inner metal shell including, and insulating rubber ring sets up between outer metal shell and inner metal shell, and in the metal shell including the lamination electricity core setting, the explosion-proof apron of inner shell passes through hot melt material and seals the inner shell holding tank. The utility model discloses a pass through the hot melt material with the explosion-proof apron of inner shell with negative pole utmost point ear and connect in the shell holding tank, realize the sealed to lamination electricity core, and when button cell inside the expansion that generates heat produced high-pressure gas, can be through melting the hot melt material for the explosion-proof apron of inner shell separates with interior metal casing, thereby releases high-pressure gas, prevents that the battery from catching fire or exploding.
Description
Technical Field
The utility model relates to a battery field, in particular to lamination electricity core button cell with inner shell explosion-proof construction.
Background
Along with the development of electronic technology, the market has released various electronic product, make people's life more and more convenient and intelligent, most electronic product all relies on the battery to carry out the energy supply, wherein button cell is because its thickness is thinner, and the size is little, consequently often is applied on various electronic product, when button cell inside the inflation that generates heat, button cell can burst outer metal-back release energy and explode, button cell among the prior art does not design better explosion-proof structure, has the potential safety hazard.
Therefore, it is desirable to provide a laminated cell button battery with an explosion-proof structure of an inner casing to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lamination electricity core button cell with inner shell explosion-proof structure, it passes through the hot melt material with the explosion-proof apron of inner shell and connects in the inner shell holding tank, realize the sealed to lamination electricity core, and when the inside inflation that generates heat of button cell produced high-pressure gas, can be through melting the hot melt material, make the explosion-proof apron of inner shell and the separation of interior metal casing, thereby release high-pressure gas, prevent that the battery from catching fire or exploding, do not design better explosion-proof structure with the button cell who solves among the prior art, there is the problem of potential safety hazard.
In order to solve the technical problem, the utility model adopts the technical scheme that: a laminated cell button battery with an inner shell explosion-proof structure, comprising:
the inner metal shell is of a cylindrical structure with a first opening at one end, an inner shell accommodating groove and an inner shell through hole are formed in the end face of the outer portion of the inner metal shell, and the inner shell through hole is communicated with the inner shell accommodating groove and the inner cavity of the inner metal shell;
the outer metal shell is of a cylindrical structure with a second opening at one end, the first opening is in butt joint with the second opening, and the inner metal shell is sleeved in the outer metal shell;
the insulating rubber ring is arranged between the outer metal shell and the inner metal shell in a sealing mode, one end of the outer metal shell is connected to the periphery of the insulating rubber ring in a locking mode, and a seal is formed between the edge of the outer metal shell and the insulating rubber ring;
the laminated cell is arranged in the inner metal shell in a laminated mode, the laminated cell is connected with the inner metal shell through a negative electrode lug, and the laminated cell is connected with the outer metal shell through a positive electrode lug; and
the inner shell explosion-proof cover plate is connected in the inner shell accommodating groove through hot melt materials and seals the inner shell through hole.
The utility model discloses in, the internal face of inner shell holding tank is the inclined plane or is provided with spacing portion on the inner wall face, works as the week side of inner shell explosion-proof apron with during the internal face or the spacing portion contact of inner shell holding tank, the explosion-proof apron of inner shell with set for the distance at a distance between the bottom surface of inner shell holding tank.
The utility model discloses in, the explosion-proof apron of inner shell is metal sheet or insulation board.
The utility model discloses in, the insulating rubber ring cladding is in on the inside and outside surface of the axial curb plate of interior metal casing.
The utility model discloses in be provided with the disappointing mouth of rubber ring on the insulating rubber ring, work as outer metal casing with when interior metal casing separation was to setting for the degree, the disappointing mouth intercommunication of rubber ring the inner space and the exterior space of outer metal casing.
In the utility model, the laminated cell button battery further comprises a shell explosion-proof cover plate, wherein a shell accommodating groove and a shell through hole which communicates the shell accommodating groove and the inner cavity of the outer metal shell are arranged on the end surface outside the outer metal shell;
the one end of anodal utmost point ear is passed the shell through-hole extends to the outside with the welding the surface of outer metal casing, anodal utmost point ear is located in the shell holding tank, the explosion-proof apron of shell passes through hot melt material to be connected in the shell holding tank, the explosion-proof apron of shell seals the shell through-hole.
In the utility model, the laminated cell button battery further comprises an outer shell explosion-proof cover plate and an inner shell explosion-proof cover plate, wherein the outer metal shell is provided with an outer shell through hole for communicating the inner cavity of the outer metal shell with the external space, and the inner metal shell is provided with an inner shell through hole for communicating the inner cavity of the inner metal shell with the external space;
one end of the positive electrode lug is welded on the inner surface of the outer metal shell, the shell explosion-proof cover plate is connected to the outer surface of the outer metal shell through a hot melting material, and the shell explosion-proof cover plate seals the shell through hole;
one end of the negative electrode lug is welded on the inner surface of the inner metal shell, the inner shell explosion-proof cover plate is connected on the outer surface of the inner metal shell through hot melt materials, and the inner shell explosion-proof cover plate seals the inner shell through hole.
The utility model discloses in keep away from in the outer metal casing second open-ended one end is provided with the section that contracts, it is close to contract the section the internal diameter of second open-ended one end is greater than it keeps away from to contract the section the internal diameter of second open-ended one end.
In the utility model, an inner shell clamping part is arranged at one end of the outer side of the inner metal shell far away from the first opening, the inner shell clamping part comprises an inner first convex part and an outer first concave part, and the inner insulating rubber ring is coated in a non-first convex part area at the inner side of the inner metal shell;
the insulating rubber ring is provided with a rubber ring clamping portion, the rubber ring clamping portion comprises an inner second convex portion and an outer second concave portion, the second convex portion is clamped in the first concave portion, and the edge of a second opening of the outer metal shell is clamped in the second concave portion through extrusion deformation.
The utility model discloses in interior metal casing is close to first open-ended border and is provided with the hem, the hem is to the outside protrusion, the hem with the insulating rubber ring card is solid.
The utility model discloses compare in prior art, its beneficial effect is: the utility model discloses pass through hot melt material with the explosion-proof apron of inner shell and connect in the inner shell holding tank, realize the sealed to lamination electricity core, and when button cell inside the inflation that generates heat produced high-pressure gas, can be through melting hot melt material for the explosion-proof apron of inner shell separates with interior metal casing, thereby releases high-pressure gas, prevents that the battery from catching fire or exploding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is a schematic structural view of a first embodiment of the laminated cell button battery with an inner shell explosion-proof structure of the present invention.
Fig. 2 is a schematic structural diagram of a laminated cell button battery with an inner shell explosion-proof structure provided with annular convex strips according to a first embodiment.
Fig. 3 is an enlarged view of a portion of the structure at X in fig. 2.
Fig. 4 is an enlarged view of a portion of the structure at Y in fig. 2.
Fig. 5 is a schematic diagram of a laminated cell button battery with an inner shell explosion-proof structure according to a second embodiment of the present invention.
Fig. 6 is an enlarged view of a portion of the structure at Z in fig. 5.
Fig. 7 is a schematic structural view of a positive electrode tab extending through the outer metal shell and welded to the outer surface.
Fig. 8 is a schematic structural view of a negative electrode tab welded to the inner surface of the inner metal case.
Fig. 9 is a schematic structural view of the positive electrode tab welded to the inner surface of the outer metal shell.
An outer metal shell 11; an annular rib 111; an inner metal shell 12; inner shell accommodating grooves 121; inner shell through holes 122; a folded edge 123; an insulating rubber ring 13; a rubber ring air escape 131; a negative electrode tab 141; a positive electrode tab 142; a separator film 143; a negative electrode tab 15; a positive electrode tab 16; an inner shell explosion-proof cover plate 17; a hot melt material 18; the length L is compacted.
An outer metal shell 21; a housing receiving groove 211; a housing through-hole 212; an inner metal shell 22; an inner shell engaging portion 221; the inner shell receiving groove 222; an inner shell through hole 223; an insulating rubber ring 23; a rubber ring engaging portion 231; a negative electrode plate 241; a positive electrode piece 242; the separator 243; a negative electrode tab 25; a positive electrode tab 26; an inner shell explosion-proof cover plate 27; a hot melt material 28; a housing explosion-proof cover plate 29; a hot-melt material 2A; tightening segment L
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, the directional terms, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and the directional terms are used for illustration and understanding, but not for limiting the present invention.
The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor should they be construed as limiting in any way.
When the button cell generates heat and expands inside, the outer metal shell can be broken to release energy to generate explosion, and the button cell in the prior art has no better explosion-proof structure and has potential safety hazard.
Following do the utility model provides a pair of can solve the first embodiment of the lamination electricity core button cell who has inner shell explosion-proof structure of above technical problem.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a laminated cell button battery with an inner shell explosion-proof structure according to a first embodiment of the present invention.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The utility model provides a lamination electricity core button cell with inner shell explosion-proof structure, it includes interior metal casing 12, outer metal casing 11, lamination electricity core, insulating rubber ring 13 and the explosion-proof apron 17 of inner shell.
The outer metal shell 11 is a cylindrical structure with a second opening at one end, the first opening is in butt joint with the second opening, and the inner metal shell 12 is sleeved in the outer metal shell 11.
An insulating rubber ring 13 is arranged between the outer metal shell 11 and the inner metal shell 12 in a sealing mode, so that sealing and insulation are formed between the outer metal shell 11 and the inner metal shell 12. One end of the second opening of the outer metal shell 11 is locked and connected to the periphery of the insulating rubber ring 13, so that a seal is formed between the edge of the outer metal shell 11 and the insulating rubber ring 13.
The laminated battery cell is arranged in the inner metal shell 12 and comprises a negative pole tab 15, a positive pole tab 16, a negative pole tab 141, a positive pole tab 142 and an isolating film 143 clamped between the negative pole tab 141 and the positive pole tab 142, the multilayer negative pole tab 141, the multilayer positive pole tab 142 and the multilayer isolating film 143 are arranged in a laminated mode along the axial direction of the inner metal shell 12, the negative pole tab 15 is connected with the negative pole tab 141 and the inner metal shell 12, the negative pole tab 15 extends to the outside through an inner shell through hole 122 to be welded on the outer surface of the inner metal shell 12, welding operation is more convenient, and the positive pole tab 16 is connected with the positive pole tab 142 and the outer metal shell 11.
The inner shell explosion-proof cover plate 17 seals the inner shell accommodating groove 121 through the hot melt material 18, and the inner shell explosion-proof cover plate 17 in this embodiment is a metal plate or an insulating plate.
In this embodiment, the inner housing explosion-proof cover 17 is connected in the inner housing accommodating groove 121 through the hot-melt material 18, when the battery generates heat, high-pressure gas is generated in the battery, the temperature of the battery rises to the melting temperature range of the hot-melt material 18, the hot-melt material 18 loses the bonding capability, the inner housing explosion-proof cover 17 is disconnected from the outer metal housing 11, a release channel is formed between the inner housing explosion-proof cover 17 and the outer metal housing 11, and the high-pressure gas can be released through the release channel to prevent the battery from catching fire or exploding.
Among them, the hot melt material 18 is preferably a hot melt adhesive.
In this embodiment, the multiple layers of negative electrode tab 141, the multiple layers of positive electrode tab 142, and the multiple layers of isolation films 143 are stacked in the axial direction of the inner metal shell 12 to form a stacked structure, the first end of the negative electrode tab 15 is located on one radial side of the stacked structure and connected to the multiple layers of negative electrode tab 141, the second end of the negative electrode tab 15 is connected to the inner metal shell 12, the first end of the positive electrode tab 16 is located on one radial side of the stacked structure and connected to the multiple layers of positive electrode tab 142, and the second end of the positive electrode tab 16 is connected to the outer metal shell 11.
Referring to fig. 3, fig. 3 is an enlarged view of a portion of the structure at X in fig. 2.
In this embodiment, the inner wall surface 1211 of the inner housing receiving groove 121 is an inclined surface or a limiting portion is provided on the inner wall surface 1211, so that when the circumferential side of the inner housing explosion-proof cover 17 contacts the inner wall surface 1211 or the limiting portion of the inner housing receiving groove 121, the distance between the inner housing explosion-proof cover 17 and the bottom surface of the inner housing receiving groove 121 is set, a glue spreading space for arranging the hot-melt material 18 is formed, and after the glue spreading space is formed, the glue spreading amount can be controlled according to the determined glue spreading space, so that the glue spreading effect is better.
It can be understood that by controlling the contact position of inner shell explosion-proof cover 17 with inner wall 1211 or stopper of inner shell receiving groove 121, it is possible to control the outer surface of inner shell explosion-proof cover 17 to be flush with or stepped with the outer surface of inner metal shell 12.
Preferably, the insulating rubber ring 13 in this embodiment is wrapped on the inner and outer surfaces of the axial side plate of the inner metal shell 12, the insulating rubber ring 13 and the inner metal shell 12 are connected to form a more stable integral structure, which is convenient for assembly, and the integral structure and the outer metal shell 11 have good assembly and connection effects.
Referring to fig. 2, preferably, an annular protruding strip 111 is disposed on an inner wall of the outer metal shell 11, the annular protruding strip 111 is in interference connection with the insulating rubber ring 13, and the annular protruding strip 111 is formed by punching an outer side of the outer metal shell 11.
The annular rib 111 can enhance the connection between the outer metal shell 11 and the inner metal shell 12, and the annular rib 111 is formed by punching after the outer metal shell 11 and the inner metal shell 12 are assembled, so that the assembling operation of the outer metal shell 11 and the inner metal shell 12 is not affected.
In this embodiment, a rubber ring air leakage opening 131 is formed in the insulating rubber ring 13, and when the battery generates heat, high-pressure gas is generated inside the battery, and the high-pressure gas can separate the outer metal shell 11 from the insulating rubber ring 13. When outer metal casing 11 and insulating rubber ring 13 separate to the settlement degree, insulating rubber ring 13 no longer with outer metal casing 11 sealing connection for rubber ring is lost heart 131 can communicate the inner space and the exterior space of outer metal casing 11, thereby can release high-pressure gas through rubber ring is lost heart 131, prevents that the battery from catching fire or exploding, cooperates with the explosion-proof structure of inner shell explosion-proof apron 17, obtains dual explosion-proof effect.
In this embodiment, a constricted section L is provided at the end of the outer metal shell 11 away from the second opening, and the inner diameter of the constricted section L gradually decreases in the direction from the second opening to the inner bottom surface of the outer metal shell 11, i.e. the inner diameter of the constricted section at the end close to the second opening is larger than the inner diameter of the constricted section at the end away from the second opening.
In addition, an expansion section is arranged at one end, far away from the second opening, in the outer metal shell 11, the expansion section is a section of the upper part of the contraction section L of the outer metal shell 11 in fig. 1, and the outer diameter of the insulating rubber ring 13 is smaller than the inner diameter of the expansion section, so that the insulating rubber ring 13 can be conveniently and quickly connected into the outer metal shell 11 in the early stage of assembly.
The height-diameter ratio of the laminated cell button battery in the embodiment is between 0.4 and 1.
Referring to fig. 4, fig. 4 is an enlarged view of a portion of the structure at Y in fig. 2.
In this embodiment, a folded edge 123 protruding outward is provided at the edge of the first opening of the inner metal shell 12, and the folded edge 123 is fastened to the insulating rubber ring 13 to prevent the inner metal shell 12 from separating from the insulating rubber ring 13, so that the inner metal shell 12 and the insulating rubber ring 13 are connected and fastened.
The utility model discloses a keep away from second open-ended one end in outer metal casing 11 and be provided with and reduce section L, along the direction of the directional outer metal casing 11 inner bottom surface of second opening, reduce section L's internal diameter and reduce gradually, in the earlier stage that insulating rubber ring 13 and outer metal casing 11 cup jointed, have the clearance between the inner wall of insulating rubber ring 13 and outer metal casing 11, it is comparatively convenient, easy to install.
And when the insulating rubber ring 13 is gradually connected with the tightening section L, the insulating rubber ring 13 gradually forms interference connection with the outer metal shell 11, then the edge of the outer metal shell 11 is pressurized to deform the outer metal shell, and after the deformation is generated, the edge of the outer metal shell 11 is locked and connected to the periphery of the insulating rubber ring 13, so that a seal is formed between the edge of the outer metal shell 11 and the insulating rubber ring 13.
The inner shell explosion-proof cover plate 17 is connected in the inner shell accommodating groove 121 through the hot melting material 18, when the battery generates heat, high-pressure gas can be generated in the battery, the temperature of the battery rises to the melting temperature range of the hot melting material 18, the hot melting material 18 loses the bonding capability, the inner shell explosion-proof cover plate 17 is disconnected with the outer metal shell 11, a release channel is formed between the inner shell explosion-proof cover plate 17 and the outer metal shell 11, and the high-pressure gas can be released through the release channel to prevent the battery from catching fire or exploding.
Following do the utility model provides a pair of can solve above technical problem have the lamination electricity core button cell's of inner shell explosion-proof structure second embodiment.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a laminated cell button battery with an inner shell explosion-proof structure according to a second embodiment of the present invention.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The utility model provides a lamination electricity core button cell with explosion-proof structure of inner shell, it includes interior metal casing 22, outer metal casing 21, lamination electricity core, insulating rubber ring 23 and the explosion-proof apron 27 of inner shell.
The inner metal shell 22 is a tubular structure with a first opening at one end, an inner shell receiving groove 222 and an inner shell through hole 223 are formed in the end face of the outer portion of the inner metal shell 22, and the inner shell through hole 223 is communicated with the inner cavities of the inner shell receiving groove 222 and the inner metal shell 22.
The outer metal shell 21 is a tubular structure with a second opening at one end, the first opening and the second opening are butted to enable the inner metal shell 22 to be sleeved in the outer metal shell 21, a tightening section L is arranged at one end, far away from the second opening, of the outer metal shell 21, and the inner diameter of the tightening section L is gradually reduced along the direction of the second opening pointing to the inner bottom surface of the outer metal shell 21.
An insulating rubber ring 23 is coated on the inner surface and the outer surface of the axial side plate of the inner metal shell 22, the outer side of the insulating rubber ring 23 is in sealing contact with the inner wall surface of the outer metal shell 21, and one end of a second opening of the outer metal shell 21 is locked and connected with the periphery of the insulating rubber ring 23 to form a seal.
The laminated cell is arranged in the inner metal shell 22, and comprises a negative pole tab 25, a positive pole tab 26, a negative pole tab 241, a positive pole tab 242 and an isolating film 243 clamped between the negative pole tab 241 and the positive pole tab 242, wherein the multilayer negative pole tab 241, the multilayer positive pole tab 242 and the multilayer isolating film 243 are arranged in a laminated manner along the axial direction of the inner metal shell 22, the negative pole tab 25 is connected with the negative pole tab 241 and the inner metal shell 22, the negative pole tab 25 extends to the outside through the inner shell through hole 223 to be welded on the outer surface of the inner metal shell 22, and the positive pole tab 26 is connected with the positive pole tab 242 and the outer metal shell 21.
The multilayer negative pole piece 241, the multilayer positive pole piece 242 and the multilayer isolating film 243 are stacked along the axial direction of the inner metal shell 22 to form a stacked structure, the first end of the negative pole tab 25 is located on one radial side of the stacked structure and connected with the multilayer negative pole piece 241, the second end of the negative pole tab 25 is connected with the inner metal shell 22, the first end of the positive pole tab 26 is located on one radial side of the stacked structure and connected with the multilayer positive pole piece 242, and the second end of the positive pole tab 26 is connected with the outer metal shell 21.
Referring to fig. 5 and fig. 6, fig. 6 is an enlarged view of a portion of the structure at Z in fig. 5.
One end of the negative electrode tab 25 extends to the outside through the inner case through-hole 223 to be welded to the outer surface of the inner metal case 22, and the welding operation is more convenient. The inner shell explosion-proof cover plate 27 is connected in the inner shell accommodating groove 222 through the hot melting material 28, and the inner shell explosion-proof cover plate 27 closes the inner shell through hole 223.
Among them, the hot melt material 28 is preferably a hot melt adhesive.
The explosion-proof cover plate 27 of the inner shell in this embodiment can be made of an insulating plate or a metal plate.
Or referring to fig. 8, one end of the negative electrode tab 25 can be welded to the inner surface of the inner metal shell 22, the inner shell explosion-proof cover plate 27 is connected to the inner shell receiving groove 222 through the hot-melt material 28, and the inner shell explosion-proof cover plate 27 closes the inner shell through hole 223.
The inner shell explosion-proof cover plate 27 is connected with the inner metal shell 22 through the hot melting material 28, when the battery generates heat, high-pressure gas can be generated in the battery, the temperature of the battery rises to the melting temperature range of the hot melting material 28, the hot melting material 28 loses the bonding capability, the inner shell explosion-proof cover plate 27 is disconnected with the inner metal shell 22, a release channel is formed between the inner shell explosion-proof cover plate 27 and the inner metal shell 22, and the high-pressure gas can be released through the release channel to prevent the battery from catching fire or exploding.
Wherein, need notice negative pole utmost point ear 25 and inner shell through-hole 223 dislocation set, avoid negative pole utmost point ear 25 to block inner shell through-hole 223, in addition, can set up inner shell holding tank 222 on the outside terminal surface of inner metal casing 22, the explosion-proof apron 27 of inner shell can set up in inner shell holding tank 222.
Referring to fig. 7, fig. 7 is a schematic structural view illustrating a positive tab extending through an outer metal shell and welded to an outer surface of the outer metal shell.
In this embodiment, the laminated cell button battery further includes an explosion-proof cover plate 29 of the outer case, and an outer case receiving groove 211 and an outer case through hole 212 are provided on an end surface outside the outer metal case 21, and the outer case through hole 212 communicates with inner cavities of the outer metal case 21 and the outer case receiving groove 211.
One end of the positive electrode tab 26 extends to the outside through the housing through hole 212 to be welded to the outer surface of the outer metal shell 21, the housing explosion-proof cover plate 29 is attached in the housing receiving groove 211 by the hot melt material 2A, and the housing explosion-proof cover plate 29 closes the housing through hole 212.
Among them, the hot melt material 2A is preferably a hot melt adhesive.
Or referring to fig. 9, one end of the positive electrode tab 26 can be optionally welded to the inner surface of the outer metal shell 21, the housing explosion-proof cover plate 29 is connected to the housing accommodating groove 211 through the hot melting material 2A, and the housing explosion-proof cover plate 29 closes the housing through hole 212.
The explosion-proof cover plate 29 of the outer shell is connected with the outer metal shell 21 through the hot melting material 2A, when the battery generates heat, high-pressure gas can be generated in the battery, the temperature of the battery rises to the melting temperature range of the hot melting material 2A, the hot melting material 2A loses the bonding capability, the explosion-proof cover plate 29 of the outer shell is disconnected with the outer metal shell 21, a release channel is formed between the explosion-proof cover plate 29 of the outer shell and the outer metal shell 21, and the high-pressure gas can be released through the release channel to prevent the battery from catching fire or exploding.
Wherein, need pay attention to positive pole utmost point ear 26 and shell through-hole 212 dislocation set, avoid positive pole utmost point ear 26 to keep off shell through-hole 212, in addition, can set up shell holding groove 211 on the outside terminal surface of outer metal casing 21, the explosion-proof apron 29 of shell can set up in shell holding groove 211.
Referring to fig. 5, in the present embodiment, an inner shell fastening portion 221 is disposed at an end of the outer side of the inner metal shell 22 away from the first opening, the inner shell fastening portion 221 includes an inner first convex portion and an outer first concave portion, and the inner insulating rubber ring 23 is wrapped in a non-first convex portion area of the inner side of the inner metal shell 22, that is, as shown in fig. 5, the inner insulating rubber ring 23 of the inner metal shell 22 does not extend from bottom to top until it contacts with the first convex portion, so that space is saved.
Be provided with rubber ring joint portion 231 on the insulating rubber ring 23, rubber ring joint portion 231 includes the second convex part of inboard and the second concave part in the outside, and second convex part joint is in first concave part, and the second open-ended border of outer metal casing 21 passes through extrusion deformation joint in the second concave part.
In this embodiment, by providing the inner housing receiving groove 222, the inner housing through hole 223 and the inner housing explosion-proof cover plate 27 on the inner metal shell 22, or providing the outer housing receiving groove 211, the outer housing through hole 212 and the outer housing explosion-proof cover plate 29 on the outer metal shell 21, the battery can obtain an explosion-proof effect without providing an explosion-proof structure in which the outer metal shell 21 and the insulating rubber ring 23 are separated, and therefore the battery can be connected very stably by providing the inner housing clamping portion 221 and the rubber ring clamping portion 231.
The assembly process of the laminated cell button battery with the inner shell explosion-proof structure in this embodiment can refer to the first embodiment, and details are not repeated here.
The utility model discloses a lamination electricity core button cell with explosion-proof structure of inner shell extends the negative pole utmost point ear to the outside through the inner shell through-hole to can be convenient weld the negative pole utmost point ear at the surface of inner metal casing, and the explosion-proof apron of inner shell seals on the inner shell holding tank through hot melt material; meanwhile, when the interior of the button battery generates heat and expands, the energy can be released by melting the hot-melt material, so that the battery is prevented from catching fire or exploding.
In summary, although the present invention has been disclosed in two embodiments, the above embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a lamination electricity core button cell with explosion-proof structure of inner shell which characterized in that includes:
the inner metal shell is of a cylindrical structure with a first opening at one end, an inner shell accommodating groove and an inner shell through hole are formed in the end face of the outer portion of the inner metal shell, and the inner shell through hole is communicated with the inner shell accommodating groove and the inner cavity of the inner metal shell;
the outer metal shell is of a cylindrical structure with a second opening at one end, the first opening is in butt joint with the second opening, and the inner metal shell is sleeved in the outer metal shell;
the insulating rubber ring is arranged between the outer metal shell and the inner metal shell in a sealing mode, one end of the outer metal shell is connected to the periphery of the insulating rubber ring in a locking mode, and a seal is formed between the edge of the outer metal shell and the insulating rubber ring;
the laminated cell is arranged in the inner metal shell in a laminated mode, the laminated cell is connected with the inner metal shell through a negative electrode lug, and the laminated cell is connected with the outer metal shell through a positive electrode lug; and
the inner shell explosion-proof cover plate is connected in the inner shell accommodating groove through hot melt materials and seals the inner shell through hole.
2. The laminated cell button battery with the inner casing explosion-proof structure as claimed in claim 1, wherein the inner wall surface of the inner casing accommodating groove is a slope or is provided with a limiting portion on the inner wall surface, and when the peripheral side of the inner casing explosion-proof cover plate is in contact with the inner wall surface or the limiting portion of the inner casing accommodating groove, the inner casing explosion-proof cover plate is spaced from the bottom surface of the inner casing accommodating groove by a set distance.
3. The laminated cell button battery with the explosion-proof structure of the inner casing as claimed in claim 1, wherein the explosion-proof cover plate of the inner casing is a metal plate or an insulating plate.
4. The laminated cell button battery with the explosion-proof structure of the inner casing as claimed in claim 1, wherein the insulating rubber ring is coated on the inner and outer surfaces of the axial side plate of the inner metal casing.
5. The laminated cell button battery with the inner casing explosion-proof structure as claimed in claim 1, wherein a rubber ring air-release opening is provided on the insulating rubber ring, and when the outer metal casing and the inner metal casing are separated to a set degree, the rubber ring air-release opening communicates with the inner space and the outer space of the outer metal casing.
6. The laminated cell button battery with the inner shell explosion-proof structure as claimed in claim 1, further comprising an outer shell explosion-proof cover plate, wherein an outer shell accommodating groove and an outer shell through hole communicating the outer shell accommodating groove and the inner cavity of the outer metal shell are formed on the end surface outside the outer metal shell;
the one end of anodal utmost point ear is passed the shell through-hole extends to the outside with the welding the surface of outer metal casing, anodal utmost point ear is located in the shell holding tank, the explosion-proof apron of shell passes through hot melt material to be connected in the shell holding tank, the explosion-proof apron of shell seals the shell through-hole.
7. The laminated cell button battery with the inner shell explosion-proof structure as claimed in claim 1, further comprising an outer shell explosion-proof cover plate and an inner shell explosion-proof cover plate, wherein an outer shell through hole communicating an inner cavity of the outer metal shell with an external space is formed in the outer metal shell, and an inner shell through hole communicating an inner cavity of the inner metal shell with an external space is formed in the inner metal shell;
one end of the positive electrode lug is welded on the inner surface of the outer metal shell, the shell explosion-proof cover plate is connected to the outer surface of the outer metal shell through a hot melting material, and the shell explosion-proof cover plate seals the shell through hole;
one end of the negative electrode lug is welded on the inner surface of the inner metal shell, the inner shell explosion-proof cover plate is connected on the outer surface of the inner metal shell through hot melt materials, and the inner shell explosion-proof cover plate seals the inner shell through hole.
8. The laminated cell button battery with the inner casing explosion-proof structure as claimed in claim 1, wherein a constricted section is provided at an end of the outer metal casing away from the second opening, and an inner diameter of the constricted section at an end close to the second opening is larger than an inner diameter of the constricted section at an end away from the second opening.
9. The laminated cell button battery with the inner shell explosion-proof structure as claimed in claim 1, wherein an inner shell clamping portion is arranged at one end of the outer side of the inner metal shell, which is far away from the first opening, and comprises a first convex portion at the inner side and a first concave portion at the outer side, and the insulating rubber ring at the inner side is coated on a non-first convex portion area at the inner side of the inner metal shell;
the insulating rubber ring is provided with a rubber ring clamping portion, the rubber ring clamping portion comprises an inner second convex portion and an outer second concave portion, the second convex portion is clamped in the first concave portion, and the edge of a second opening of the outer metal shell is clamped in the second concave portion through extrusion deformation.
10. The laminated cell button battery with the inner shell explosion-proof structure as claimed in claim 1, wherein a folded edge is provided at the edge of the inner metal shell close to the first opening, the folded edge protrudes outwards, and the folded edge is fastened to the insulating rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020785406.6U CN211789226U (en) | 2020-05-12 | 2020-05-12 | Laminated cell button battery with inner shell explosion-proof structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020785406.6U CN211789226U (en) | 2020-05-12 | 2020-05-12 | Laminated cell button battery with inner shell explosion-proof structure |
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| Publication Number | Publication Date |
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| CN211789226U true CN211789226U (en) | 2020-10-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497695A (en) * | 2022-01-12 | 2022-05-13 | 广州小鹏汽车科技有限公司 | Soft packet of lithium cell and electric automobile |
| CN115395149A (en) * | 2022-09-30 | 2022-11-25 | 路华置富电子(东莞)有限公司 | Laminated button battery with ruffle structure |
-
2020
- 2020-05-12 CN CN202020785406.6U patent/CN211789226U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497695A (en) * | 2022-01-12 | 2022-05-13 | 广州小鹏汽车科技有限公司 | Soft packet of lithium cell and electric automobile |
| CN115395149A (en) * | 2022-09-30 | 2022-11-25 | 路华置富电子(东莞)有限公司 | Laminated button battery with ruffle structure |
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