CN214625297U - Integrated flame-retardant structure, top cover and battery - Google Patents
Integrated flame-retardant structure, top cover and battery Download PDFInfo
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- CN214625297U CN214625297U CN202120606667.1U CN202120606667U CN214625297U CN 214625297 U CN214625297 U CN 214625297U CN 202120606667 U CN202120606667 U CN 202120606667U CN 214625297 U CN214625297 U CN 214625297U
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- thermal runaway
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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 25
- 238000007789 sealing Methods 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 43
- 230000002265 prevention Effects 0.000 claims abstract description 25
- 230000009172 bursting Effects 0.000 claims abstract description 6
- 239000003063 flame retardant Substances 0.000 claims description 26
- 238000004080 punching Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 239000002360 explosive Substances 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000000034 method Methods 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
- 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
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- -1 but not limited to Chemical compound 0.000 description 1
- 238000005253 cladding 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
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 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 belongs to the technical field of battery production and manufacture, in particular to an integrated flame-retardant structure, a top cover and a battery, which comprises an explosion-proof ring (1) provided with a through hole (10), wherein a breaking structure (4) is arranged in the through hole (10); the explosion-proof sheet (2) is arranged above the through hole (10); a sealing part (3) disposed below the through hole (10); the explosion-proof ring (1), the explosion-proof sheet (2) and the sealing part (3) form a sealing cavity (5) for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealing cavity (5), and the bursting structure (4) can puncture the sealing part (3) at a set temperature and/or pressure to release the thermal runaway prevention material 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 battery production manufacturing, concretely relates to fire-retardant structure of integrated form, top cap 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, and a breaking structure is arranged in the through hole; the explosion-proof sheet is arranged above the through hole; a sealing part disposed below the through hole; the explosion-proof ring, the explosion-proof sheet and the sealing part form a sealing cavity for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealing cavity, and the bursting structure can puncture the sealing part at a set temperature and/or pressure to release the thermal runaway prevention material into the battery.
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 edge of the sealing part is provided with a boss, and the top of the boss is in concave-convex fit with the bottom of the explosion-proof ring.
Preferably, the top of boss is provided with convex body and outer edge, the bottom of explosion-proof ring be provided with convex body complex concave body, outer edge surrounds the lateral wall of explosion-proof ring.
Preferably, one surface of the sealing part corresponding to the breaking structure is provided with a plurality of grooves, and the grooves are arranged around the through hole.
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 step, the step centers on the through-hole sets up, the explosion-proof piece inlay in the 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.
The utility model discloses a second purpose lies in a top cap, including foretell integrated form fire-retardant structure.
The third object of the present invention is to provide a battery, including the above-mentioned top cap.
The utility model has the advantages that the utility model comprises an explosion-proof ring, which is provided with a through hole, and a breaking structure is arranged in the through hole; the explosion-proof sheet is arranged above the through hole; a sealing part disposed below the through hole; the explosion-proof ring, the explosion-proof sheet and the sealing part form a sealing cavity for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealing cavity, and the bursting structure can puncture the sealing part at a set temperature and/or pressure to release the thermal runaway prevention material 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, influence the output power of the battery or deteriorate the low-temperature performance of the battery, and the like, therefore, a through hole is arranged in an explosion-proof ring, an explosion-proof sheet is arranged above the through hole, a sealing part is arranged below the through hole, the explosion-proof ring, the explosion-proof sheet and the sealing part form a sealing cavity for containing the thermal runaway material, the thermal runaway material is contained in the sealing cavity, the thermal runaway material is isolated from the internal electrolyte environment of the battery and the external environment of the explosion-proof ring, and abnormal or thermal runaway can occur in the battery, when the internal pressure or the temperature of the battery is higher, a large amount of gas generated in the battery is expanded, the sealing part is also expanded and deformed, and the material is collided with the burst structure above the sealing part to be broken, and the material is released to the battery for preventing thermal runaway before the flammable and explosive gas, thereby not only playing the roles of inflaming retarding and fire extinguishing, but also blocking the further contact of the combustible substance and oxygen, being beneficial to preventing the flammable and explosive gas in the battery from being burnt when the flammable and explosive gas is leaked into the internal space of the battery through the crevasse of the sealing part, 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 a large amount of heat can be taken away, so that the temperature of the single battery is ensured to be rapidly reduced, the thermal runaway of the single battery is avoided, wherein, explosion-proof ring, explosion-proof piece and sealing portion are fixed together, form the better airtight space of gas tightness, play and store volatile thermal runaway material of preventing. 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 a schematic structural view of the explosion-proof ring and the sealing portion according to the first embodiment of the present invention after assembly.
Fig. 4 is a schematic sectional view of the explosion-proof ring and the sealing portion according to the first embodiment of the present invention after assembly.
Fig. 5 is a schematic structural view of a seal portion according to a first embodiment of the present invention.
Fig. 6 is a schematic sectional view of a seal portion according to a first embodiment of the present invention.
Fig. 7 is a schematic structural view of a burst structure according to a first embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a second embodiment of the present invention.
Fig. 9 is an exploded 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-a concave body; 121-step;
2-explosion-proof piece; 21-bulge;
3-a sealing part; 31-a boss; 32-grooves; 311-convex body; 312-outer edge;
4-breaking the structure; 41-a fixing frame; 42-punching cutter; 411-frame body; 412-a support; 4121-boss;
5-sealing the cavity;
6-protective film.
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 9, but the present invention is not limited thereto.
Implementation mode one
An integrated flame-retardant structure comprises an explosion-proof ring 1, a through hole 10 is arranged, and a breaking structure 4 is arranged in the through hole 10; the explosion-proof sheet 2 is arranged above the through hole 10; a sealing part 3 disposed below the through hole 10; wherein, explosion-proof ring 1, rupture disk 2 and sealing 3 form the seal chamber 5 that is used for holding thermal runaway material, hold in the seal chamber 5 and have thermal runaway material, and burst structure 4 can puncture sealing 3 under set temperature and/or pressure, releases thermal runaway material to the battery in.
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 above the through hole 10, a sealing part 3 is arranged below the through hole 10, a sealing cavity 5 for containing a thermal runaway material is formed by the explosion-proof ring 1, the explosion-proof sheet 2 and a sealing part 3, the thermal runaway material is contained in the sealing cavity 5, and is isolated from the internal electrolyte environment of the battery and the external environment of the explosion-proof ring 1, when the battery is abnormal or thermal runaway and the internal pressure of the battery is higher or the temperature is higher, a large amount of gas generated in the battery expands, the sealing part 3 also deforms by bulging and collides with the burst structure 4 above the sealing part 3 to break, the thermal runaway preventing 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 the oxygen is blocked, the flammable and explosive gas in the battery is prevented from burning when being discharged into the internal space of the battery through the burst port of the sealing part 3, meanwhile, the thermal runaway preventing 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 drop rapidly, and the thermal runaway of the single battery is avoided, wherein the explosion-proof ring 1, the explosion-proof sheet 2 and the sealing part 3 are fixed together, and a closed space with better air tightness is formed, and the volatile thermal runaway prevention material is stored.
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 integrated flame retardant structure according to the present invention, the bursting structure 4 comprises a fixed frame 41 and at least one punching blade 42/punching pin; the fixing frame 41 is arranged in the explosion-proof ring 1, or the fixing frame 41 and the explosion-proof ring 1 are integrally formed. Specifically, before the battery is abnormal or thermal runaway, the internal pressure or temperature of the battery is high, so that the sealing part 3 bulges upwards, the burst structure 4 is in contact with the sealing part 3, the burst knife 42 on the burst structure 4 can puncture the sealing part 3, so that the explosion-proof material enters into the battery, and the thermal runaway of the battery is facilitated to be slowed down, the fixing frame 41 is an integral frame structure and plays a role in fixing the position of the burst knife 42 in the explosion-proof ring 1, the burst knife 42 can be one or more, the distribution position can be in the middle or different positions, and is preferably arranged in the middle, wherein the fixing frame 41 and the burst knife 42 can be arranged in the explosion-proof ring 1 or integrally formed with the explosion-proof ring 1, so that the integral strength of the explosion-proof valve can be improved, the production cost can be reduced, the two can be metal or nonmetal, the burst knife 42 can be other sharp objects, and has sharp protrusions, such as a conical shape, a pyramid shape or a burst needle, however, the present invention is not limited to this, and the structure of the sealing portion 3 is satisfied.
According to the utility model discloses an among the fire-retardant structure of integrated form, the edge of sealing 3 is provided with boss 31, the unsmooth cooperation in the bottom of the top of boss 31 and explosion-proof ring 1. Increase boss 31, can with the unsmooth cooperation in bottom of explosion-proof ring 1, help increasing the edge of sealing 3 and the adhesion force between the explosion-proof ring 1, thereby form the better sealed chamber 5 of gas tightness, the realization is stored the thermal runaway material of the anti-heat that easily volatilizees, furthermore, the bottom of sealing 3 and explosion-proof ring 1 also can be connected through the buckle, set up card portion or knot portion respectively in the bottom of sealing 3 and explosion-proof ring 1 promptly, still can adopt the mode of riveting or spiro union, it can to satisfy to fix sealing 3 in the bottom of explosion-proof ring 1.
In the fire-retardant structure of integrated form according to the utility model discloses, the top of boss 31 is provided with convex body 311 and outer edge 312, and the bottom of explosion-proof ring 1 is provided with the concave body 101 with convex body 311 complex, and outer edge 312 surrounds the lateral wall of explosion-proof ring 1. Specifically, convex body 311 on the boss 31 can cooperate with the concave body 101 of explosion-proof ring 1, play the effect of fixed seal portion 3 in explosion-proof ring 1's bottom position, simultaneously, outer 312 can be with the concave body 101 of explosion-proof ring 1's bottom cladding all around along 312, make to form stronger adhesive force between explosion-proof ring 1's concave body 101 and the sealing 3, thereby form the better seal chamber 5 of gas tightness, reduce the probability that the thermal runaway material of preventing in the seal chamber 5 takes place the leakage in advance, nevertheless the utility model discloses do not use this as the limit, explosion-proof ring 1's bottom also can set up convex body 311, and is corresponding, and boss 31's top sets up concave body 101, and the bottom and the unsmooth cooperation of sealing 3 that satisfy explosion-proof ring 1 can.
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 step 121, and step 121 sets up around through-hole 10, and explosion-proof piece 2 inlays in 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 part, 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 of taking place gas leakage, and through inlaying explosion-proof piece 2 in 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 the fire-retardant structure of integrated form, and simultaneously, explosion-proof piece 2 inlays in 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, step 121 sets up in the upper end of explosion-proof ring 1, and explosion-proof piece 2 accessible welded mode is fixed at 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 explosion-proof piece 2 and takes place the probability that drops.
The utility model discloses a theory of operation is:
the explosion-proof ring 1 is provided with a through hole 10, the explosion-proof sheet 2 is arranged above the through hole 10, the sealing part 3 is arranged below the through hole 10, the explosion-proof ring 1, the explosion-proof sheet 2 and the sealing part 3 form a sealing cavity 5 for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealing cavity 5, the thermal runaway prevention material is isolated from the electrolyte environment in the battery and the environment outside the explosion-proof ring 1, the battery can be abnormal or thermally runaway, when the internal pressure of the battery is higher or the temperature is higher, a large amount of gas generated in the battery is expanded, the sealing part 3 is also expanded and deformed, and collides with the burst structure 4 above the sealing part 3 to be broken, the thermal runaway prevention material is released to the battery before the inflammable and explosive gas, the flame retardance and fire extinguishment effects are achieved, further contact between combustible and oxygen is blocked, and the inflammable and explosive gas in the battery can not burn when being discharged into the internal space of the battery through a burst port of the sealing part 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 a large amount of heat can be taken away, so that the temperature of the single battery is rapidly reduced, and the thermal runaway of the single battery is avoided.
Second embodiment
The difference from the first embodiment is that: the integrated flame-retardant structure of the embodiment further comprises a protective film 6, wherein the protective film 6 is arranged above the explosion-proof sheet 2, a bulge 21 is arranged on the edge of the explosion-proof sheet 2, the bulge 21 is arranged around the explosion-proof sheet 2, and the top of the bulge 21 abuts against the protective 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.
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 sealing portion 3 of the present embodiment is provided with a plurality of grooves 32 on a surface corresponding to the piercing structure 4, the plurality of grooves 32 are all disposed around the through hole 10, the fixing frame 41 includes a frame 411 and a supporting portion 412 disposed in the frame 411, at least a part of the supporting portion 412 is upwardly formed with a boss 4121, and the punching blades 42 are disposed on the boss 4121 at intervals. Specifically, the grooves 32 can be formed on the sealing part 3 through a plastic mold, and the plurality of grooves 32 are arranged around the through hole 10, so that the sealing part 3 is more easily deformed and is also easily punctured by the burst structure 4, and meanwhile, the thermal runaway prevention material in the sealing cavity 5 is gasified under the influence of temperature and enters the top space of the battery; the frame body 411 is annular, three sharp conical blades are arranged in the middle of the supporting part 412, the bursting structure 4 and the explosion-proof ring 1 can be connected through a welding mode, the supporting part 412 upwards forms a convex seat 4121, a certain gap is formed between the supporting part 412 and the sealing part 3, a plurality of punching knives 42 can be installed in the gap, the punching knives 42 can be in contact with the sealing part 3 at a set temperature and/or pressure, the punching knives 42 can burst the sealing part 3, 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, further contact between the combustible and oxygen is blocked, the flammable and explosive gas in the battery can not burn when being discharged into the internal space of the battery through a burst port of the sealing part 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 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 header comprising the integrated flame retardant structure of embodiment one.
Fifth embodiment
A header comprising the integrated flame retardant structure of embodiment two.
Sixth embodiment
A header comprising the integrated flame retardant structure of embodiment three.
Seventh embodiment
A battery comprising the cap of any one of embodiments four to 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), and a breaking structure (4) is arranged in the through hole (10);
the explosion-proof sheet (2) is arranged above the through hole (10);
a sealing part (3) disposed below the through hole (10);
the explosion-proof ring (1), the explosion-proof sheet (2) and the sealing part (3) form a sealing cavity (5) for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealing cavity (5), and the bursting structure (4) can puncture the sealing part (3) at a set temperature and/or pressure to release the thermal runaway prevention material into the battery.
2. An integrated fire retardant structure according to claim 1, wherein: the breaking structure (4) comprises a fixed frame (41) and at least one punching knife (42)/punching needle; the fixing frame (41) is arranged in the explosion-proof ring (1), or the fixing frame (41) and the explosion-proof ring (1) are integrally formed.
3. An integrated fire retardant structure according to claim 2, wherein: the fixing frame (41) comprises a frame body (411) and a supporting part (412) arranged in the frame body (411), at least part of the supporting part (412) upwards forms a boss (4121), and the punching knives (42) are arranged on the boss (4121) at intervals.
4. An integrated fire retardant structure according to claim 1, wherein: the edge of the sealing part (3) is provided with a boss (31), and the top of the boss (31) is in concave-convex fit with the bottom of the explosion-proof ring (1).
5. An integrated fire retardant structure according to claim 4, wherein: the top of boss (31) is provided with convex body (311) and outer edge (312), the bottom of explosion-proof ring (1) be provided with convex body (311) complex concave body (101), outer edge (312) surround the lateral wall of explosion-proof ring (1).
6. An integrated fire retardant structure according to claim 1, wherein: one side of the sealing part (3) corresponding to the breaking structure (4) is provided with a plurality of grooves (32), and the grooves (32) are arranged around the through hole (10).
7. An integrated fire retardant structure according to claim 1, 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 step (121), step (121) surround through-hole (10) set up, explosion-proof piece (2) inlay in step (121).
8. An integrated fire retardant structure according to claim 1, 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, characterized in that: comprising an integrated flame retardant structure according to any of claims 1-8.
10. A battery, characterized by: comprising the overcap of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606667.1U CN214625297U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover and battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606667.1U CN214625297U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover and battery |
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| Publication Number | Publication Date |
|---|---|
| CN214625297U true CN214625297U (en) | 2021-11-05 |
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|---|---|---|---|
| CN202120606667.1U Active CN214625297U (en) | 2021-03-25 | 2021-03-25 | Integrated flame-retardant structure, top cover and battery |
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| Country | Link |
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| CN (1) | CN214625297U (en) |
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- 2021-03-25 CN CN202120606667.1U patent/CN214625297U/en active Active
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Effective date of registration: 20220118 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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