CN214625296U - Integrated flame-retardant structure, top cover plate and battery - Google Patents
Integrated flame-retardant structure, top cover plate and battery Download PDFInfo
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- CN214625296U CN214625296U CN202120606031.7U CN202120606031U CN214625296U CN 214625296 U CN214625296 U CN 214625296U CN 202120606031 U CN202120606031 U CN 202120606031U CN 214625296 U CN214625296 U CN 214625296U
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000009172 bursting Effects 0.000 claims abstract description 24
- 230000002265 prevention Effects 0.000 claims abstract description 21
- 239000003063 flame retardant Substances 0.000 claims description 30
- 238000004080 punching Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 239000002360 explosive Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 description 1
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 description 1
- XRZHWZVROHBBAM-UHFFFAOYSA-N 1-bromo-3,3,3-trifluoroprop-1-ene Chemical compound FC(F)(F)C=CBr XRZHWZVROHBBAM-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- -1 but not limited to Chemical compound 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses an integrated flame-retardant structure, a top cover plate and a battery, which comprises an explosion-proof ring (1) provided with a through hole (10); the explosion-proof sheet (2) is arranged at the top of the through hole (10); a sealing member (3) disposed at the bottom of the through-hole (10); the through hole (10), the explosion-proof sheet (2) and the sealing element (3) form a closed space (4) for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the closed space (4), and a bursting structure (7) is installed in the through hole (10); the sealing element (3) closes the through hole (10) under a normal state; the sealing member (3) is punctured by the bursting structure (7) under the set temperature and/or pressure, and the thermal runaway-proof material is released into the battery. The utility model discloses can puncture sealed chamber when thermal runaway, release thermal runaway prevention material slows down the inside thermal runaway of battery, improves the security of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery manufacture, concretely relates to fire-retardant structure of integrated form, top sheet and battery.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. During high-rate charge and discharge or abuse, various electrochemical reactions or internal short circuits can occur in the lithium ion battery, so that the internal temperature and pressure of the battery are continuously increased, thermal runaway is easy to occur, and even combustion and explosion are caused, which is one of the main reasons influencing large-scale application of the lithium ion battery.
This is more serious in the conventional power battery with large capacity, and in order to improve the safety of the battery, it is common to change the type of the negative electrode or add a flame retardant to the electrolyte, but these methods all accelerate the rate of the capacity fade of the battery, and affect the output of the battery or deteriorate the low-temperature performance of the battery.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: the integrated flame-retardant structure can puncture a sealed cavity when thermal runaway, release a thermal runaway-proof material, slow down the thermal runaway inside the battery, and improve the safety of the battery.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an integrated flame-retardant structure comprises an explosion-proof ring, a flame-retardant layer and a flame-retardant layer, wherein the explosion-proof ring is provided with a through hole; the explosion-proof sheet is arranged at the top of the through hole; the sealing element is arranged at the bottom of the through hole; the through hole, the explosion-proof sheet and the sealing element form a closed space for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the closed space, and a bursting structure is arranged in the through hole; the sealing element normally closes the through hole; the sealing element is punctured by the bursting structure under the set temperature and/or pressure, and the thermal runaway prevention material is released into the battery.
Preferably, the inner wall of the explosion-proof ring is provided with a convex body, the convex body surrounds the inner wall of the explosion-proof ring, the bursting structure at least partially abuts against the edge of the upper surface of the sealing element, and the convex body abuts against the edge of the lower surface of the sealing element.
Preferably, the integrated flame-retardant structure further comprises a welding ring, the welding ring is arranged at the bottom of the sealing element, the bursting structure at least partially abuts against the edge of the upper surface of the sealing element, and the welding ring abuts against the edge of the lower surface of the sealing element.
Preferably, the bottom of the explosion-proof ring is provided with a first step and a second step, the first step and the second step are arranged around the through hole, and the sealing element and the welding ring are embedded in the first step and the second step respectively.
Preferably, the breaking structure comprises a fixing frame and at least one punching knife/punching needle; the fixing frame is arranged in the explosion-proof ring, or the fixing frame and the explosion-proof ring are integrally formed.
Preferably, the fixing frame comprises a frame body and a supporting part arranged in the frame body, at least part of the supporting part upwards forms a boss, and the punching knives are arranged on the boss at intervals.
Preferably, the explosion-proof ring includes the ring body and sets up the extension of the peripheral edge of ring body, the extension is provided with the third step, the third step centers on the through-hole sets up, the explosion-proof piece inlay in the third step.
Preferably, the flame retardant structure of integrated form still includes the protection film, the protection film sets up the top of explosion-proof piece, the edge of explosion-proof piece is provided with the arch, the arch centers on the explosion-proof piece sets up, bellied top butt in the protection film.
A second object of the present invention is to provide a top cover plate, which comprises the above-mentioned integrated flame-retardant structure.
The third object of the present invention is to provide a battery, which comprises the above-mentioned top cover plate.
The utility model has the advantages that the utility model comprises an explosion-proof ring, which is provided with a through hole; the explosion-proof sheet is arranged at the top of the through hole; the sealing element is arranged at the bottom of the through hole; the through hole, the explosion-proof sheet and the sealing element form a closed space for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the closed space, and a bursting structure is arranged in the through hole; the sealing element normally closes the through hole; the sealing element is punctured by the bursting structure under the set temperature and/or pressure, and the thermal runaway prevention material is released into the battery. In the existing large-capacity power battery, various electrochemical reactions or internal short circuits can occur in the lithium ion battery, so that the internal temperature and air pressure of the battery can be continuously increased, thermal runaway is easily caused, even combustion and explosion are caused, in order to improve the safety of the battery, a common method is to change the type of a negative electrode or add a flame retardant into an electrolyte, but the methods can accelerate the attenuation speed of the battery capacity, influence the output power of the battery or deteriorate the low-temperature performance of the battery, and the like The outer side environment of the explosion-proof ring is isolated; when the battery is abnormal or thermal runaway, when the internal pressure of the battery is higher or the temperature of the battery is higher, a large amount of gas generated in the battery is expanded, the sealing element is expanded and deformed and collides with a burst structure above the sealing element to be broken, a thermal runaway-proof material is released to the battery before the flammable and explosive gas, so that the flame-retardant and fire-extinguishing effects are achieved, further contact between a combustible and oxygen is blocked, the flammable and explosive gas in the battery is prevented from burning when the flammable and explosive gas is discharged into the internal space of the battery through a rupture port of the sealing element, meanwhile, the thermal runaway-proof material is further vaporized in a high-temperature environment and enters the space at the top of the battery, a large amount of heat can be taken away, the temperature of the single battery is ensured to be rapidly reduced, the thermal runaway of the single battery is avoided, wherein the sealing element is of a planar plate-shaped structure, and the difficulty of the production process of the sealing element is reduced, the production cost of the sealing element can be reduced, and the bottom or the inner wall of the through hole can form a structure for installing the sealing element, so that the sealing element can be fixed. The utility model discloses can puncture sealed chamber when thermal runaway, release thermal runaway prevention material slows down the inside thermal runaway of battery, improves the security of battery.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of a first embodiment of the present invention.
Fig. 3 is an exploded view of a first embodiment of the present invention.
Fig. 4 is a schematic view of the assembled explosion-proof ring and the burst structure according to the first embodiment of the present invention.
Fig. 5 is a schematic structural view of a burst structure according to a first embodiment of the present invention.
Fig. 6 is an exploded view of a second embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of a second embodiment of the present invention.
Wherein the reference numerals are as follows:
1-an explosion-proof ring; 10-a through hole; 11-a ring body; 12-an extension; 101-convex body; 121-third step;
2-explosion-proof piece; 21-bulge;
3-a seal;
4-a closed space;
5-a solder ring;
6-protective film;
7-breaking the structure; 71-a fixing frame; 72-punching cutter; 711-a frame body; 712-a support portion;
8-a first step; 9-second step.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to fig. 1 to 7, but the present invention is not limited thereto.
Implementation mode one
An integrated flame-retardant structure comprises an explosion-proof ring 1 provided with a through hole 10; the explosion-proof sheet 2 is arranged at the top of the through hole 10; a sealing member 3 disposed at the bottom of the through-hole 10; the through hole 10, the explosion-proof sheet 2 and the sealing element 3 form a closed space 4 for containing a thermal runaway-proof material, the thermal runaway-proof material is contained in the closed space 4, and a bursting structure 7 is arranged in the through hole 10; the sealing element 3 seals the through hole 10 in a normal state; the sealing member 3 is punctured by the bursting structure 7 under the set temperature and/or pressure, and the thermal runaway-proof material is released into the battery.
In the existing large-capacity power battery, various electrochemical reactions or internal short circuits can occur in the lithium ion battery, so that the internal temperature and air pressure of the battery are continuously increased, thermal runaway easily occurs, and even combustion and explosion are caused, in order to improve the safety of the battery, a common method is to change the type of a negative electrode or add a flame retardant into an electrolyte, but the methods can accelerate the attenuation speed of the battery capacity, affect the output power of the battery, or deteriorate the low-temperature performance of the battery, and the like, therefore, a through hole 10 is arranged in an explosion-proof ring 1, an explosion-proof sheet 2 is arranged at the top of the through hole 10, a sealing element 3 is arranged at the bottom of the through hole 10, the explosion-proof ring 1, the explosion-proof sheet 2 and the sealing element 3 form a closed space 4 for accommodating the thermal runaway material, the thermal runaway material is accommodated in the closed space 4, and the sealing element 3 closes the through hole 10 under normal conditions, isolating the thermal runaway prevention material from the electrolyte environment inside the battery and the outer environment of the explosion-proof ring 1; when the battery is abnormal or thermal runaway, when the internal pressure of the battery is higher or the temperature of the battery is higher, a large amount of gas generated in the battery is expanded, the sealing element 3 is expanded and deformed and collides with the burst structure 7 above the sealing element 3 to be broken, the thermal runaway-proof material is released to the battery before the flammable and explosive gas, so that the flame-retardant and fire-extinguishing effects are achieved, the further contact between the combustible and oxygen is blocked, the flammable and explosive gas in the battery is prevented from being combusted when being discharged into the internal space of the battery through the break port of the sealing element 3, meanwhile, the thermal runaway-proof material is further vaporized in a high-temperature environment and enters the space at the top of the battery, a large amount of heat can be taken away, the temperature of the single battery is ensured to be rapidly reduced, the thermal runaway of the single battery is avoided, wherein the sealing element 3 is of a planar plate-shaped structure, and the difficulty of the production process of the sealing element 3 is reduced, the production cost of the sealing member 3 can be reduced, and the bottom or inner wall of the through-hole 10 can form a structure for mounting the sealing member 3, which functions to fix the position of the sealing member 3.
In the embodiment, the explosion-proof ring 1, the explosion-proof sheet 2 and the sealing element 3 are fixed together to form a closed space with better air tightness, and the closed space plays a role in storing volatile thermal runaway prevention materials; the sealing element 3 can be arranged at the position below the bottom of the through hole 10, the bursting structure 7 is arranged above the sealing element 3, and when the sealing element 3 is also subjected to bulging deformation, the bursting structure 7 punctures the sealing element 3 to release the thermal runaway prevention material.
In addition, the thermal runaway prevention material can be a flame retardant or a fire extinguishing agent, or a mixture of a flame retardant and a fire extinguishing agent, the flame retardant including, but not limited to, fluorocarbon, ketone, etc., having a boiling point of less than or equal to 80 ℃, being heat-absorbable and being a non-flammable liquid; fire extinguishing agents include, but are not limited to, perfluorohexanone, bromotrifluoropropene, hexafluoropropane, heptafluoropropane, and the like.
In the basis the utility model discloses an among the fire-retardant structure of integrated form, the inner wall of explosion-proof ring 1 is provided with convex body 101, convex body 101 centers on explosion-proof ring 1's inner wall, break through the edge of structure 7 at least partial butt in the upper surface of sealing member 3, convex body 101 butt is at the edge of the lower surface of sealing member 3, in this embodiment, break through the edge of the bottom butt in the upper surface of sealing member 3 of structure 7's mount 71, convex body 101 supports the edge of the lower surface of sealing member 3, play the effect at fixed sealing member 3 edge, fixed sealing member 3 is the position in through-hole 10 promptly, avoid sealing member 3 to take place the displacement, lead to unable being punctured by breaking structure 7 when the battery thermal runaway, influence the security of battery.
In the integrated flame retardant structure according to the present invention, the bursting structure 7 comprises a fixing frame 71 and at least one punching knife 72/punching needle, the fixing frame 71 is installed in the explosion-proof ring 1. Specifically, before the battery is abnormal or thermal runaway, the internal pressure or temperature of the battery is high, the sealing element 3 is enabled to bulge upwards, the bursting structure 7 is in contact with the sealing element 3, the bursting knives 72 on the bursting structure 7 can pierce the sealing element 3, so that an explosion-proof material enters the battery, the thermal runaway of the battery is facilitated to be slowed down, the fixing frame 71 is of an integrated frame structure and plays a role in fixing the positions of the bursting knives 72 in the explosion-proof ring 1, the number of the bursting knives 72 can be one or more, the distribution positions can be in the middle or different positions, the middle is preferably arranged, wherein the fixing frame 71 and the bursting knives 72 can be installed in the explosion-proof ring 1 or integrally formed with the explosion-proof ring 1, the overall strength of the explosion-proof valve can be improved, the production cost can be reduced, the two can be metal or nonmetal, the bursting knives 72 can be made into other sharp objects, and have sharp protrusions, such as conical or pyramid or punching needles, however, the utility model is not limited to this, and the structure of the sealing element 3 can be met; in the present embodiment, an annular fixing frame 71 is disposed in the explosion-proof ring 1, three sharp conical blades, i.e., a punching knife 72, are disposed at the middle position of the fixing frame 71, and the punching structure 7 and the explosion-proof ring 1 are connected by welding.
According to the utility model discloses an among the fire-retardant structure of integrated form, explosion-proof ring 1 includes ring body 11 and sets up extension 12 at the neighboring of ring body 11, and extension 12 is provided with third step 121, and third step 121 sets up around through-hole 10, and explosion-proof piece 2 inlays in third step 121. Specifically, the ring body 11 is as the main part of the fire-retardant structure of integrated form, play the effect of fixed explosion- proof piece 2 and 3 relative positions of sealing member, extension 12 can cooperate explosion-proof piece 2, be convenient for install explosion-proof piece 2 of great size on ring body 11, not only help expanding explosion-proof ring 1's suitability, still make explosion-proof piece 2 can cover whole through-hole 10, reduce the probability that takes place to leak gas, and through inlaying explosion-proof piece 2 in third step 121, play the effect of injecing explosion-proof piece 2 in explosion-proof ring 1 position, avoid explosion-proof piece 2 to take place the skew, influence the normal work of fire-retardant structure of integrated form, and simultaneously, explosion-proof piece 2 inlays in third step 121, help reducing the whole height of the fire-retardant structure of integrated form, reduce and occupy the battery inner space, thereby improve the space utilization of battery. In addition, third step 121 sets up in the upper end of explosion-proof ring 1, and explosion-proof piece 2 accessible welded mode is fixed at third step 121, not only plays the position of restriction explosion-proof piece 2, can also improve the steadiness between explosion-proof piece 2 and the explosion-proof ring 1, reduces the probability that explosion-proof piece 2 takes place to drop.
According to the utility model discloses an among the fire-retardant structure of integrated form, the fire-retardant structure of integrated form still includes protection film 6, and protection film 6 sets up in the top of explosion-proof piece 2, and the edge of explosion-proof piece 2 is provided with arch 21, and arch 21 sets up around explosion-proof piece 2, and the top butt of arch 21 is in protection film 6. Specifically, the material of the protective film 6 is plastic such as PET, PP, PE, etc., the connection mode of the protective film 6 and the explosion-proof sheet 2 includes but is not limited to gluing or setting a back glue on the top plane of the explosion-proof sheet 2, the protective film 6 is used for preventing the fragile explosion-proof sheet 2 from being easily damaged by mistake when the battery contacts the outside, and the service life of the explosion-proof sheet 2 is prolonged; increase protruding 21, play the effect of supporting protection film 6 on the rupture disk 2, avoid protection film 6 to take place to sink, influence the fire-retardant structure normal use's of integrated form the condition, in addition for there is certain clearance between rupture disk 2 and the protection film 6, prevent that rupture disk 2 and protection film 6 from overlapping together, be convenient for dismantle and install rupture disk 2 and protection film 6.
The utility model discloses a theory of operation is:
the method comprises the steps that a through hole 10 is formed in an explosion-proof ring 1, an explosion-proof sheet 2 is arranged at the top of the through hole 10, a sealing element 3 is arranged at the bottom of the through hole 10, the explosion-proof ring 1, the explosion-proof sheet 2 and the sealing element 3 form a closed space 4 for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the closed space 4, and the sealing element 3 closes the through hole 10 under a normal state to isolate the thermal runaway prevention material from an electrolyte environment in a battery and an outer side environment of the explosion-proof ring 1; when the battery is abnormal or thermal runaway, when the internal pressure of the battery is higher or the temperature of the battery is higher, a large amount of gas generated in the battery is expanded, the sealing element 3 is expanded and deformed and collides with the burst structure 7 above the sealing element 3 to be broken, the thermal runaway-proof material is released to the battery before the flammable and explosive gas, so that the flame-retardant and fire-extinguishing effects are achieved, the further contact between the combustible and oxygen is blocked, the flammable and explosive gas in the battery is prevented from being combusted when being discharged into the internal space of the battery through the break port of the sealing element 3, meanwhile, the thermal runaway-proof material is further vaporized in a high-temperature environment and enters the space at the top of the battery, a large amount of heat can be taken away, the temperature of the single battery is ensured to be rapidly reduced, the thermal runaway of the single battery is avoided, wherein the sealing element 3 is of a planar plate-shaped structure, and the difficulty of the production process of the sealing element 3 is reduced, the production cost of the sealing member 3 can be reduced, and the bottom or inner wall of the through-hole 10 can form a structure for mounting the sealing member 3, which functions to fix the position of the sealing member 3.
Second embodiment
The difference from the first embodiment is that: the integrated flame-retardant structure of this embodiment still includes weld ring 5, and weld ring 5 sets up in the bottom of sealing member 3, breaks through structure 7 at least partial butt in the edge of the upper surface of sealing member 3, and weld ring 5 butt in the edge of the lower surface of sealing member 3, and the bottom of explosion-proof ring 1 is provided with first step 8 and second step 9, and first step 8 and second step 9 all set up around through-hole 10, and sealing member 3 and weld ring 5 are embedded respectively in first step 8 and second step 9. Specifically, the bottom of the explosion-proof ring 1 is sunken into the wall of the explosion-proof ring 1, and is in a two-layer ladder shape, namely a first step 8 and a second step 9 are formed, the first step 8 and the second step 9 are arranged around the through hole 10, the sealing element 3 is fixed on the first step 8, then the welding ring 5 is welded with the second step 9 at the bottom of the explosion-proof ring 1 to provide an annular space for filling the sealing element 3, so as to accommodate the sealing element 3 and prevent the sealing element 3 from falling off from the bottom of the explosion-proof ring 1, in addition, the bursting structure 7 is at least partially abutted against the edge of the upper surface of the sealing element 3, the welding ring 5 is abutted against the edge of the lower surface of the sealing element 3 to play a role of fixing the edge of the sealing element 3, namely, the position of the sealing member 3 in the through hole 10 is fixed, so that the sealing member 3 is prevented from being displaced, and the sealing member cannot be punctured by the puncturing structure 7 when the battery is out of control due to heat, and the safety of the battery is influenced.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the fixing frame 71 of the present embodiment is integrally formed with the explosion-proof ring 1, the fixing frame 71 includes a frame body 711 and a support portion 712 provided in the frame body 711, at least a part of the support portion 712 is upwardly formed with a boss, and the punching blades 72 are provided at the boss at intervals. The fixing frame 71 and the explosion-proof ring 1 are integrally formed, the integral strength of the flame-retardant structure can be improved, the production cost is reduced, the fixing frame and the explosion-proof ring can be metal or nonmetal, the supporting part 712 upwards forms a convex seat, a certain gap is formed between the supporting part 712 and the sealing element 3, a plurality of punching knives 72 can be installed in the gap, the punching knives 72 can be in contact with the sealing element 3 at a set temperature and/or pressure, the sealing element 3 can be broken through by the punching knives 72, the thermal runaway prevention material is released to the battery before the flammable and explosive gas, the flame-retardant and fire-extinguishing effects are achieved, the further contact between the flammable substance and oxygen is blocked, the flammable and explosive gas inside the battery can not burn when being discharged into the internal space of the battery through the break port of the sealing element 3, meanwhile, the thermal runaway prevention material is further vaporized in a high-temperature environment and enters the space at the top of the battery, and can also take away a large amount of heat, thereby guaranteeing the temperature of the single battery to drop sharply and avoiding the occurrence of thermal runaway of the single battery.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A top flap comprising the integrated flame retardant structure of embodiment one.
Fifth embodiment
A top flap comprising the integrated fire retardant structure of embodiment two.
Sixth embodiment
A top sheet comprising the integrated fire retardant structure of embodiment three.
Seventh embodiment
A battery comprising the top cover sheet of embodiment four.
Embodiment eight
A battery comprising the top cover sheet of embodiment five.
Ninth embodiment
A battery comprising the top cover sheet of embodiment six.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. An integrated flame retardant structure, comprising:
the explosion-proof ring (1) is provided with a through hole (10);
the explosion-proof sheet (2) is arranged at the top of the through hole (10);
a sealing member (3) disposed at the bottom of the through-hole (10);
the through hole (10), the explosion-proof sheet (2) and the sealing element (3) form a closed space (4) for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the closed space (4), and a bursting structure (7) is installed in the through hole (10); the sealing element (3) closes the through hole (10) under a normal state; the sealing member (3) is punctured by the bursting structure (7) under the set temperature and/or pressure, and the thermal runaway-proof material is released into the battery.
2. An integrated fire retardant structure according to claim 1, wherein: the inner wall of the explosion-proof ring (1) is provided with a convex body (101), the convex body (101) surrounds the inner wall of the explosion-proof ring (1), at least part of the burst structure (7) is abutted to the edge of the upper surface of the sealing element (3), and the convex body (101) is abutted to the edge of the lower surface of the sealing element (3).
3. An integrated fire retardant structure according to claim 1, wherein: the integrated flame-retardant structure further comprises a welding ring (5), the welding ring (5) is arranged at the bottom of the sealing element (3), the bursting structure (7) is at least partially abutted to the edge of the upper surface of the sealing element (3), and the welding ring (5) is abutted to the edge of the lower surface of the sealing element (3).
4. An integrated fire retardant structure according to claim 3, wherein: the bottom of explosion-proof ring (1) is provided with first step (8) and second step (9), first step (8) with second step (9) all surround through-hole (10) set up, sealing member (3) with weld ring (5) embedded respectively in first step (8) with second step (9).
5. An integrated fire retardant structure, as claimed in any one of claims 1 to 4, wherein: the punching structure (7) comprises a fixed frame (71) and at least one punching knife (72)/punching needle; the fixing frame (71) is arranged in the explosion-proof ring (1), or the fixing frame (71) and the explosion-proof ring (1) are integrally formed.
6. An integrated fire retardant structure according to claim 5, wherein: the fixing frame (71) comprises a frame body (711) and a supporting part (712) arranged in the frame body (711), at least part of the supporting part (712) upwards forms a convex seat, and the punching knives (72) are arranged on the convex seat at intervals.
7. An integrated fire retardant structure, as claimed in any one of claims 1 to 4, wherein: explosion-proof ring (1) includes ring body (11) and sets up extension (12) at the peripheral edge of ring body (11), extension (12) are provided with third step (121), third step (121) surround through-hole (10) set up, explosion-proof piece (2) inlay in third step (121).
8. An integrated fire retardant structure, as claimed in any one of claims 1 to 4, wherein: the integrated flame-retardant structure further comprises a protective film (6), wherein the protective film (6) is arranged above the explosion-proof sheet (2), the edge of the explosion-proof sheet (2) is provided with a bulge (21), the bulge (21) surrounds the explosion-proof sheet (2), and the top of the bulge (21) is abutted to the protective film (6).
9. A top cover sheet characterized by: comprising an integrated flame retardant structure according to any of claims 1-8.
10. A battery, characterized by: comprising the top cover sheet of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606031.7U CN214625296U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606031.7U CN214625296U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover plate and battery |
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| Publication Number | Publication Date |
|---|---|
| CN214625296U true CN214625296U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120606031.7U Active CN214625296U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover plate and battery |
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| Country | Link |
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| CN (1) | CN214625296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023100562B3 (en) | 2023-01-12 | 2024-02-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | High-voltage battery with a sealing element arranged in a degassing opening |
-
2021
- 2021-03-25 CN CN202120606031.7U patent/CN214625296U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023100562B3 (en) | 2023-01-12 | 2024-02-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | High-voltage battery with a sealing element arranged in a degassing opening |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220119 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: Room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Suzhou, Jiangsu 215500 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: Jiangsu Tafel Power System Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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| CP03 | Change of name, title or address |