CN215008495U - Flame retardant structure, top cover and battery - Google Patents
Flame retardant structure, top cover and battery Download PDFInfo
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- CN215008495U CN215008495U CN202120606709.1U CN202120606709U CN215008495U CN 215008495 U CN215008495 U CN 215008495U CN 202120606709 U CN202120606709 U CN 202120606709U CN 215008495 U CN215008495 U CN 215008495U
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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 23
- 238000007789 sealing Methods 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 41
- 230000002265 prevention Effects 0.000 claims abstract description 25
- 239000003063 flame retardant Substances 0.000 claims description 25
- 210000005056 cell body Anatomy 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 7
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000010073 coating (rubber) Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 210000002421 cell wall Anatomy 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 7
- 238000004519 manufacturing process Methods 0.000 abstract description 9
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- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002360 explosive 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
- 239000000178 monomer Substances 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 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
- 238000005538 encapsulation Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- -1 but not limited to Chemical compound 0.000 description 1
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- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 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
- 238000002347 injection Methods 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
Images
Classifications
-
- 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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- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model belongs to the technical field of battery production and manufacture, in particular to a flame-retardant structure, a top cover and a battery, which comprises a sealing part (1); an explosion-proof sheet (2) provided above the seal portion (1); the sealing part (1) and the explosion-proof sheet (2) form a sealing cavity (5) for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealing cavity (5); the sealing part (1) dissolves under a set condition, and releases the thermal runaway prevention material to the battery. The utility model discloses can be when thermal runaway, the part dissolves, and the thermal runaway material is prevented in the release, 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, 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 fire-retardant structure is provided aiming at the defects of the prior art, and can partially dissolve and release the thermal runaway prevention material when thermal runaway occurs, so that the thermal runaway inside the battery is slowed down, and the safety of the battery is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flame retardant structure comprising a seal; an explosion-proof sheet disposed above the sealing portion; the sealing part and the explosion-proof sheet form a sealing cavity for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealing cavity; the sealing part is dissolved under a set condition, and the thermal runaway prevention material is released to the battery.
Preferably, the sealing part comprises a groove body and an opening arranged at the top of the groove body, the groove body and the explosion-proof sheet form the sealing cavity, and the groove wall of the groove body abuts against the explosion-proof sheet.
Preferably, the upper bottom surface of the tank body is provided with a notch, and the notch surrounds the tank body.
Preferably, the flame retardant structure further comprises a top cover plate, the periphery of the sealing portion and the top cover plate are connected in an injection molding and rubber coating mode, a first groove used for being embedded into the sealing portion is formed in the bottom of the top cover plate, and an outer edge matched with the first groove is formed in the side portion of the sealing portion.
Preferably, the top cover plate is provided with at least one of explosion-proof valve hole, utmost point post through-hole and notes liquid hole, the sealing portion install in explosion-proof valve hole, the top of explosion-proof valve hole is provided with the second recess, the second recess centers on explosion-proof valve hole sets up, explosion-proof piece inlay in the second recess.
Preferably, the flame retardant structure further comprises a protective film, the protective film is arranged on the top of the explosion-proof sheet, and the area of the protective film is smaller than or equal to that of the explosion-proof sheet.
Preferably, the edge of the explosion-proof sheet is provided with a bulge, the bulge surrounds the explosion-proof sheet, and the top of the bulge abuts against the protective film.
Preferably, the sealing part is high-density polyethylene, and the melting point of the sealing part is 120-130 ℃.
Preferably, the explosion-proof plate is fixed above the sealing part by welding.
A second object of the present invention is to provide a top cover, including the above-mentioned flame 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 a sealing part; an explosion-proof sheet disposed above the sealing portion; the sealing part and the explosion-proof sheet form a sealing cavity for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealing cavity; the sealing part is dissolved under a set condition, and the thermal runaway prevention material is released to the battery. In the existing large-capacity power battery, multiple 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 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, therefore, a sealing part and an explosion-proof sheet are adopted to form a sealing cavity, a thermal runaway-proof material is filled in the sealing cavity, when the internal pressure of the battery is higher or the temperature is higher, a single battery cell bears high temperature, the sealing part at the bottom of the sealing cavity is firstly dissolved, so that the thermal runaway-proof material is released to the battery from the dissolving part of the sealing part before flammable and explosive gas, not only play fire-retardant and the effect of putting out a fire, still block the further contact of combustible substance and oxygen, help making the inside flammable explosive gas of battery no longer take place the burning when leaking into battery inner space through the dissolution position of sealing, simultaneously, thermal runaway prevention material further vaporizes at high temperature environment, get into the space at battery top, also can take away a large amount of heat, thereby guarantee that the cell temperature sharply descends, avoid the emergence of cell thermal runaway, wherein, sealing and explosion-proof piece are together fixed, form the better airtight space of gas tightness, not only reduce the quantity of spare part, and the production cost is reduced, can also ensure to store volatile thermal runaway prevention material, avoid thermal runaway material to take place to leak. The utility model discloses can be when thermal runaway, the part dissolves, and the thermal runaway material is prevented in the release, 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 an exploded view of a first embodiment of the present invention.
Fig. 2 is an exploded view of a second embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.
Fig. 5 is a schematic sectional view of a fourth embodiment of the present invention.
Fig. 6 is an exploded view of a fourth embodiment of the present invention.
Wherein the reference numerals are as follows:
1-a sealing part; 11-a trough body; 12-an opening; 13-outer edge; 111-scoring;
2-explosion-proof piece; 21-bulge;
3-top cover sheet; 30-a first groove; 31-explosion-proof valve hole; 32-pole through hole; 33-liquid injection hole; 311-a second groove;
4-protective film;
5-sealing the cavity.
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 6, but the present invention is not limited thereto.
Implementation mode one
A flame retardant structure includes a seal portion 1; an explosion-proof sheet 2 disposed above the sealing portion 1; the sealing part 1 and the explosion-proof sheet 2 form a sealing cavity 5 for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealing cavity 5; the sealing portion 1 dissolves under a predetermined condition, and releases the thermal runaway preventive material to 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 sealing part 1 and an explosion-proof sheet 2 are adopted to form a sealing cavity 5, a thermal runaway-proof material is filled in the sealing cavity 5, when the battery is abnormal or thermally runaway, and the internal pressure of the battery is high or the temperature is high, a single battery cell can bear high temperature, a sealing part 1 at the bottom of the sealing cavity 5 is firstly dissolved, so that the thermal runaway-proof material is dissolved from the sealing part 1, release anti thermal runaway material to the battery earlier than inflammable and explosive gas, not only play fire-retardant and the effect of putting out a fire, still block the further contact of combustible substance and oxygen, help making the inside inflammable and explosive gas of battery no longer take place the burning when leaking the internal space of battery through the dissolution position of sealing 1, anti thermal runaway material further vaporizes at high temperature environment simultaneously, get into the space at battery top, also can take away a large amount of heat, thereby guarantee that the monomer battery temperature sharply descends, avoid the emergence of monomer battery thermal runaway, wherein, sealing 1 and explosion-proof piece 2 are fixed together, form the better airtight space of gas tightness, not only reduce the quantity of spare part, reduce manufacturing cost, can also ensure to store volatile anti thermal runaway material, avoid anti thermal runaway material to take place to leak.
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.
According to the utility model discloses an among the fire-retardant structure, sealing 1 includes cell body 11 and sets up at the opening 12 at cell body 11 top, and cell body 11 and explosion-proof piece 2 form sealed chamber 5, cell body 11's cell wall butt in explosion-proof piece 2. Specifically, the groove body 11 is formed on an explosion-proof valve hole 31 of the top cover plate 3 in an injection molding and encapsulation mode, and forms a sealing cavity 5 with the explosion-proof plate 2, so that a thermal runaway prevention material is isolated from an electrolyte environment inside the battery core and an outer side environment of the top cover plate 3, when the thermal runaway of the battery occurs, the battery can bear a high temperature of 150 ℃ in a short time, the groove body 11 can be dissolved at 120 ℃, and the thermal runaway prevention material in the sealing cavity 5 is vaporized under the influence of temperature and enters a top space of the battery core; after the cell body 11 is dissolved, high-pressure gas in the battery can be decompressed through the explosion-proof sheet 2, so that the purpose of rapid decompression is achieved.
In the fire-retardant structure according to the utility model discloses, the last bottom surface of cell body 11 is provided with nick 111, and nick 111 sets up around cell body 11. Increase nick 111, can reduce the thickness of the bottom surface of cell body 11 for the bottom of cell body 11 can be dissolved at predetermined temperature, simultaneously, makes cell body 11 dissolve the in-process, can dissolve along the route of nick 111 smoothly, forms great breach fast, helps accelerating the release of thermal runaway material.
According to the utility model discloses an among the fire-retardant structure, fire-retardant structure still includes top plate 3, and sealing 1 is connected through the rubber coating mode of moulding plastics with top plate 3 all around, and top plate 3's bottom is provided with the first recess 30 that is used for embedding sealing 1, and sealing 1's lateral part is provided with along 13 with first recess 30 complex is outer. The stability between the sealing part 1 and the top cover plate 3 can be improved by adopting the injection molding and encapsulation mode, the injection molding and encapsulation process is simple, the step of independently producing the sealing part 1 is omitted, and the production efficiency of the flame-retardant structure is improved; the first groove 30 of the top cover sheet 3 is in concave-convex fit with the outer edge 13 of the sealing part 1 side, and the sealing part 1 is embedded into the first groove 30, so that the position of the sealing part 1 on the top cover sheet 3 is limited, and the probability of displacement of the sealing part 1 is reduced.
According to the utility model discloses an among the fire-retardant structure, the top plate piece 3 is provided with explosion-proof valve opening 31, utmost point post through-hole 32 and annotates at least one in the liquid hole 33, and the sealing 1 is installed in explosion-proof valve opening 31, and the top of explosion-proof valve opening 31 is provided with second recess 311, and second recess 311 sets up around explosion-proof valve opening 31, and explosion-proof piece 2 inlays in second recess 311. Specifically, can install the fire-retardant structure of equipment in explosion-proof valve opening 31, be about to sealing 1 installs in explosion-proof valve opening 31, and simultaneously, the top of explosion-proof valve opening 31 is provided with second recess 311, but explosion-proof piece 2 holding is at second recess 311, help reducing the holistic height of battery top cap, can also prevent that explosion-proof piece 2 from taking place the displacement, guarantee that explosion-proof piece 2 is located the top of explosion-proof valve opening 31 all the time, ensure that explosion-proof piece 2 fixes the top at sealing 1 promptly, form sealed chamber.
The utility model discloses a theory of operation is:
adopt sealing 1 and explosion-proof piece 2 to form sealed chamber 5, sealed chamber 5 is filled with thermal runaway prevention material, can take place unusually or thermal runaway in the battery, when the battery internal pressure is great or temperature is higher, monomer electricity core bears high temperature, sealing 1 located in sealed chamber 5 bottom takes place to dissolve at first, make thermal runaway prevention material from the dissolution position of sealing 1, release thermal runaway prevention material to the battery earlier than flammable explosive gas, not only play fire-retardant and put out a fire the effect, still block the further contact of combustible substance and oxygen, help making the flammable explosive gas in the battery no longer take place to burn when leaking into the internal space of battery through the dissolution position of sealing 1, thermal runaway prevention material further vaporizes in the high temperature environment at the same time, get into the space at the top of the battery, also can take away a large amount of heat, thereby guarantee monomer battery temperature sharply to descend, avoid the occurrence of thermal runaway of monomer battery, wherein, sealing 1 and rupture disk 2 are fixed together, form the better airtight space of gas tightness, not only reduce the quantity of spare part, reduction in production cost can also ensure to store volatile thermal runaway material, avoids thermal runaway material to take place to leak.
Second embodiment
The difference from the first embodiment is that: the flame-retardant structure of this embodiment still includes protection film 4, and protection film 4 sets up at the top of explosion-proof piece 2, and the area of protection film 4 is less than or equal to the area 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 4. Specifically, the material of protection film 4 is plastics such as PET, PP, PE, protection film 4 and explosion-proof piece 2's connected mode includes but not limited to at 2 top planes rubber coating of explosion-proof piece or set up the gum, protection film 4 prevents to be hurt comparatively fragile explosion-proof piece 2 by the mistake easily when the battery contacts the outside, help prolonging the life of explosion-proof piece 2, the area of explosion-proof piece 2 is slightly greater than the area of protection film 4, guaranteeing that explosion-proof piece 2 covers whole explosion-proof valve hole 31, and under protection film 4 plays the prerequisite of protecting most explosion-proof piece 2, help reducing protection film 4's area, thereby reduce protection film 4's manufacturing cost. In addition, increase arch 21 for arch 21's top butt is in protection film 4, plays the effect of supporting protection film 4 on the rupture disk 2, avoids protection film 4 to take place to sink, influences the condition of fire-retardant structure normal use, in addition, makes to have certain clearance between rupture disk 2 and the protection film 4, prevents that rupture disk 2 and protection film 4 from overlapping together, is convenient for dismantle and install rupture disk 2 and protection film 4.
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 part 1 of the present embodiment is made of high density polyethylene, the melting point of the sealing part 1 is 120-130 ℃, and the explosion-proof sheet 2 is fixed above the sealing part 1 by welding. High Density Polyethylene (HDPE) with crystallinity of 80-90%, softening point of 125-135 deg.C and service temperature of 100 deg.C; the hardness, tensile strength and creep property are better than those of low-density polyethylene; the wear resistance, the electrical insulation, the toughness and the cold resistance are good; the chemical stability is good, and the paint is not dissolved in any organic solvent at room temperature, and is resistant to corrosion of acid, alkali and various salts; the film has small permeability to water vapor and air and low water absorption; the property that the aging resistance is poor and the environmental stress cracking resistance is inferior to that of the low density polyethylene, especially the thermal oxidation causes the performance to be reduced can be utilized, when the battery is subjected to thermal runaway, the battery can bear 150 ℃ high temperature in a short time, the groove body 11 of the sealing part 1 can be dissolved at 120 ℃, and the thermal runaway prevention material in the sealing cavity 5 is vaporized under the influence of the temperature and enters the top space of the battery core. The explosion-proof plate 2 may be fixed above the sealing portion 1 by welding according to the actual structure and cost requirements, but the fixing manner includes but is not limited to welding, and may be at least one of bonding, clamping or riveting.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A header comprising the flame retardant structure of embodiment one.
Fifth embodiment
A header comprising the flame retardant structure of embodiment two.
Sixth embodiment
A top cover comprising the flame retardant structure of embodiment three.
Seventh embodiment
A battery comprising the cap of any one of embodiments one to four.
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. A flame retardant structure, comprising:
a sealing section (1);
an explosion-proof sheet (2) provided above the seal portion (1);
the sealing part (1) and the explosion-proof sheet (2) form a sealing cavity (5) for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealing cavity (5); the sealing part (1) dissolves under a set condition, and releases the thermal runaway prevention material to the battery.
2. A fire retardant construction, as claimed in claim 1, wherein: sealing portion (1) includes cell body (11) and sets up opening (12) at cell body (11) top, cell body (11) with explosion-proof piece (2) form sealed chamber (5), the cell wall butt of cell body (11) in explosion-proof piece (2).
3. A fire retardant construction, as claimed in claim 2, wherein: the upper bottom surface of the tank body (11) is provided with a notch (111), and the notch (111) surrounds the tank body (11).
4. A fire retardant construction, as claimed in claim 1, wherein: the flame-retardant structure further comprises a top cover plate (3), the periphery of the sealing portion (1) is connected with the top cover plate (3) in an injection molding and rubber coating mode, a first groove (30) used for being embedded into the sealing portion (1) is formed in the bottom of the top cover plate (3), and an outer edge (13) matched with the first groove (30) is arranged on the side portion of the sealing portion (1).
5. A fire retardant construction, as claimed in claim 4, wherein: top cap piece (3) are provided with explosion-proof valve opening (31), utmost point post through-hole (32) and annotate at least one in liquid hole (33), sealing portion (1) install in explosion-proof valve opening (31), the top of explosion-proof valve opening (31) is provided with second recess (311), second recess (311) center on explosion-proof valve opening (31) set up, explosion-proof piece (2) inlay in second recess (311).
6. A fire retardant construction, as claimed in claim 1, wherein: the flame-retardant structure further comprises a protective film (4), wherein the protective film (4) is arranged at the top of the explosion-proof sheet (2), and the area of the protective film (4) is smaller than or equal to that of the explosion-proof sheet (2).
7. A fire retardant construction, as claimed in claim 6, wherein: the edge of explosion-proof piece (2) is provided with arch (21), arch (21) centers on explosion-proof piece (2) sets up, the top butt of arch (21) in protection film (4).
8. A fire retardant construction, as claimed in claim 1, wherein: the sealing part (1) is made of high-density polyethylene, the melting point of the sealing part (1) is 120-130 ℃, and the explosion-proof sheet (2) is fixed above the sealing part (1) through welding.
9. A top cover, characterized in that: comprising a flame retardant structure according to any of claims 1-8.
10. A battery, characterized by: comprising the overcap of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606709.1U CN215008495U (en) | 2021-03-25 | 2021-03-25 | Flame retardant structure, top cover and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606709.1U CN215008495U (en) | 2021-03-25 | 2021-03-25 | Flame retardant structure, top cover and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215008495U true CN215008495U (en) | 2021-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120606709.1U Active CN215008495U (en) | 2021-03-25 | 2021-03-25 | Flame retardant structure, top cover and battery |
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| Country | Link |
|---|---|
| CN (1) | CN215008495U (en) |
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2021
- 2021-03-25 CN CN202120606709.1U patent/CN215008495U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220124 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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| CP03 | Change of name, title or address | ||
| 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 |