CN214754053U - Explosion-proof combination valve, top cap and battery - Google Patents
Explosion-proof combination valve, top cap and battery Download PDFInfo
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- CN214754053U CN214754053U CN202120516220.5U CN202120516220U CN214754053U CN 214754053 U CN214754053 U CN 214754053U CN 202120516220 U CN202120516220 U CN 202120516220U CN 214754053 U CN214754053 U CN 214754053U
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- thermal runaway
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- 239000000463 material Substances 0.000 claims abstract description 42
- 230000002265 prevention Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 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 compound 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 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 9
- 238000004880 explosion Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 11
- 239000002360 explosive Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 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
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 238000003466 welding Methods 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
- 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
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006073 displacement reaction 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
- 238000009434 installation Methods 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
- 239000011241 protective layer Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
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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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model belongs to the technical field of battery production and manufacture, in particular to an explosion-proof combination valve, a top cover 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); the opening valve plate (3) is arranged at the bottom of the through hole (10); the explosion-proof ring (1), the explosion-proof sheet (2) and the valve opening sheet (3) 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 surface of the explosion-proof sheet (2) corresponding to the valve opening plate (3) is provided with a plurality of puncturing parts (20), and the puncturing parts (20) puncture the valve opening plate (3) under a set condition to release a thermal runaway prevention material to the battery. The utility model discloses can release thermal runaway prevention material when thermal runaway, slow down the inside thermal runaway of battery, improve the security of battery.
Description
Technical Field
The utility model belongs to the technical field of battery manufacture, concretely relates to explosion-proof combination valve, 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 degradation of the battery capacity, and affect the output of the battery and the low-temperature performance of the battery.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: aiming at the defects of the prior art, the anti-explosion combination valve is provided, a thermal runaway prevention material can be released when thermal runaway occurs, 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:
an explosion-proof combination valve comprises an explosion-proof ring, a valve body and a valve body, 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 opening valve plate is arranged at the bottom of the through hole; the explosion-proof ring, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealed cavity; the surface of the explosion-proof piece corresponding to the opening valve plate is provided with a plurality of puncturing parts, and the puncturing parts puncture the opening valve plate under a set condition to release the thermal runaway prevention material to the battery.
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 bottom of the through hole is provided with a groove, and the opening valve plate is accommodated in the groove.
Preferably, the explosion-proof sheet and the piercing part are of an integrally formed structure, and one end of the piercing part, which is connected with the explosion-proof sheet, is of a hollow structure or a solid structure.
Preferably, the explosion-proof combination valve further comprises a protection film, the protection film is arranged at the top of the explosion-proof piece, and the area of the protection film is larger than or equal to that of the explosion-proof piece.
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, a weak area is arranged at the position, corresponding to the puncture part, of the opening valve plate, the thickness of the weak area is thinner than that of other parts of the opening valve plate, and the opening valve plate is punctured by the puncture part when the opening valve plate reaches a set temperature and/or pressure.
Preferably, the piercing portion is conical or pyramidal.
Preferably, the thermal runaway prevention material is a flame retardant or a fire extinguishing agent.
The second objective of the present invention is to provide a top cover, including the above-mentioned explosion-proof combination valve.
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; the explosion-proof sheet is arranged at the top of the through hole; the opening valve plate is arranged at the bottom of the through hole; the explosion-proof ring, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing a thermal runaway prevention material, and the thermal runaway prevention material is contained in the sealed cavity; the surface of the explosion-proof piece corresponding to the opening valve plate is provided with a plurality of puncturing parts, and the puncturing parts puncture the opening valve plate under a set condition to release the thermal runaway prevention 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, influence the output power of the battery, 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 at the top of the through hole, a valve opening sheet is arranged at the bottom of the through hole, the explosion-proof ring, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing the thermal runaway material, the thermal runaway material is contained in the sealed cavity, the thermal runaway material is isolated from the internal electrolyte environment of the battery and the environment outside the explosion-proof ring, and abnormal or thermal runaway can occur in the battery, when the internal pressure of the battery is higher or the temperature is higher, the middle position of the valve opening plate is greatly deformed, the puncture part of the explosion-proof plate punctures the valve plate, the thermal runaway-proof material is broken from the opening of the valve opening plate, and releases the thermal runaway-proof material to the battery before the flammable and explosive gas, not only playing the role of flame retardance and fire extinguishment, but also blocking the further contact of the combustible substance and oxygen, being beneficial to ensuring that the flammable and explosive gas in the battery can not burn when being discharged into the internal space of the battery through the opening of the valve plate, 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 open the valve piece and fix together, form the better airtight space of gas tightness, play and store the volatile thermal runaway material of preventing. The utility model discloses can release thermal runaway prevention material when thermal runaway, slow down the inside thermal runaway of battery, improve 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 structural view of an explosion-proof ring according to a first embodiment of the present invention.
Fig. 5 is a schematic sectional view of an explosion-proof ring according to a first embodiment of the present invention.
Fig. 6 is a schematic bottom structure view of an explosion-proof sheet according to a first embodiment of the present invention.
Fig. 7 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; 111-grooves; 121-step;
2-explosion-proof piece; 20-a piercing section; 21-bulge;
3-opening the valve plate;
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 7, but the present invention is not limited thereto.
Implementation mode one
An explosion-proof combination valve comprises an explosion-proof ring 1, a valve body and a valve body, wherein 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; the opening valve plate 3 is arranged at the bottom of the through hole 10; the explosion-proof ring 1, the explosion-proof sheet 2 and the opening valve sheet 3 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 surface of the explosion-proof sheet 2 corresponding to the valve plate 3 is provided with a plurality of puncture parts 20, and the puncture parts 20 puncture the valve plate 3 under the set condition to release the thermal runaway-proof material to the battery.
In the conventional 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 is easily caused, 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, deteriorate the low-temperature performance of the battery, and the like, so as shown in fig. 1 to 6, 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, an opening sheet 3 is arranged at the bottom of the through hole 10, a sealed cavity 5 for containing a thermal runaway material is formed by the explosion-proof ring 1, the explosion-proof sheet 2 and the opening sheet 3, the thermal runaway material is contained in the sealed cavity 5, and the thermal runaway material and the internal electrolyte environment of the battery are mixed with the electrolyte, The environment outside the explosion-proof ring is isolated, when the battery is abnormal or thermal runaway, the internal pressure of the battery is larger or the temperature is higher, the middle position of the valve opening plate 3 is greatly deformed, the piercing part 20 of the explosion-proof plate 2 pierces the valve opening plate 3, the thermal runaway-proof material is released from the piercing opening of the valve opening plate 3 and 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 released into the internal space of the battery through the piercing opening of the valve opening plate 3, meanwhile, the thermal runaway-proof material is further vaporized in the 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, and the thermal runaway of the single battery is avoided, wherein the explosion-proof ring 1, the explosion-proof plate 2 and the valve opening plate 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 present embodiment, the explosion-proof ring 1, the explosion-proof sheet 2 and the valve opening sheet 3 may be assembled in advance to form an integrated structure, and then the explosion-proof combination valve is mounted on the battery, or the explosion-proof ring 1 may be separately mounted on the top cover of the battery in advance, or the explosion-proof ring 1 and the top cover may be formed into an integrated structure, so that the normal operation of the explosion-proof combination valve is satisfied.
In according to the utility model discloses an among the explosion-proof combination valve, 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 explosion-proof combination valve, play the effect of fixed explosion-proof piece 2 and the 3 relative positions of valve opening piece, 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 explosion-proof combination valve normal work, and simultaneously, explosion-proof piece 2 inlays in step 121, help reducing explosion-proof combination valve overall height, reduce and occupy the battery inner space, thereby improve the space utilization of battery. Wherein, the explosion-proof sheet 2 is welded on the explosion-proof ring 1, but the fixing mode between the explosion-proof sheet 2 and the explosion-proof ring 1 includes but not limited to welding, and also can be at least one of clamping, riveting and bonding,
in the explosion-proof combination valve according to the utility model, the bottom of through-hole 10 sets up recess 111, and the open valve piece 3 holding is in recess 111. Open valve block 3 welding on explosion-proof ring 1's recess 111, through recess 111, can be with opening valve block 3 and imbed explosion-proof ring 1's bottom, can fix the position of opening valve block 3, avoid opening valve block 3 and take place the displacement or rock, simultaneously, help reducing the whole height of explosion-proof combination valve to improve the space utilization of battery, nevertheless the utility model discloses do not regard this as the limit, open the below of valve block 3 and also can set up protection architecture, like the protective layer, can avoid when the installation outside article scratch to open valve block 3, help prolonging the life of opening valve block 3.
In the basis the utility model discloses an among the explosion-proof combination valve, the edge of explosion-proof piece 2 is provided with arch 21, and arch 21 sets up around explosion-proof piece 2, and arch 21's top butt is in protection film 4. Increase protruding 21, play the effect of supporting protection film 4 on the explosion-proof piece 2, avoid protection film 4 to take place to sink, influence the condition of explosion-proof combination valve normal use, in addition for there is certain clearance between explosion-proof piece 2 and the protection film 4, prevent that explosion-proof piece 2 and protection film 4 from overlapping together, be convenient for dismantle and install explosion-proof piece 2 and protection film 4.
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 at the top of the through hole 10, the valve opening sheet 3 is arranged at the bottom of the through hole 10, the explosion-proof ring 1, the explosion-proof sheet 2 and the valve opening sheet 3 form a sealed cavity 5 for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity 5, the thermal runaway prevention material is isolated from the electrolyte environment in the battery and the environment outside the explosion-proof ring, the thermal runaway prevention material can be greatly deformed when the battery is abnormal or thermally runaway and the internal pressure of the battery is higher or the temperature is higher, the middle position of the valve opening sheet 3 is greatly deformed, the puncture part 20 of the explosion-proof sheet 2 punctures the valve opening sheet 3, the thermal runaway prevention material releases the thermal runaway prevention material to the battery before the inflammable and explosive gas, the flame retardance and fire extinguishment effects are achieved, further contact between the inflammable and oxygen is blocked, and the internal inflammable and explosive gas in the battery can not be combusted when the inflammable and explosive gas in the battery leaks into the internal space of the battery through the explosion-proof sheet 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: referring to fig. 7, the explosion-proof combination valve of the present embodiment further includes a protection film 4, the protection film 4 is disposed on the top of the explosion-proof sheet 2, the explosion-proof sheet 2 and the piercing portion 20 are integrally formed, one end of the piercing portion 20 connected to the explosion-proof sheet 2 is a hollow structure or a solid structure, the piercing portion 20 is a cone or a pyramid, and the area of the protection film 4 is greater than or equal to the area of the explosion-proof sheet 2. Specifically, the protective film 4 is made of plastic such as PET, PP, PE, and the like, the connection mode between the protective film 4 and the cavity wall of the explosion-proof ring 1 includes but is not limited to gluing or applying a back glue on the top plane of the cavity wall of the explosion-proof ring 1, and the protective film 4 is used for preventing the fragile explosion-proof sheet 2 from being damaged by mistake when the battery contacts the outside, which is beneficial to prolonging the service life of the explosion-proof sheet 2; the method is characterized in that a plurality of conical or pyramid-shaped punctured puncturing parts 20 are extruded or punched on the bottom surface of the explosion-proof sheet 2 by adopting an extrusion or punch forming process, and finally the explosion-proof sheet 2 with the plurality of puncturing parts 20 is formed integrally, one end of the puncturing part 20 connected with the explosion-proof sheet 2 can be designed to be a hollow structure or a solid structure according to the actual product structure and cost requirements, and when the puncturing part 20 is connected with one end of the explosion-proof sheet 2, the hollow structure is adopted, so that the back surface of the explosion-proof sheet 2 corresponding to the puncturing part 20 is sunken downwards, on the premise of ensuring that the puncturing part 20 has enough strength, the puncturing part 20 is conveniently formed by the extrusion or punch forming process, and the production cost is also reduced.
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 valve-opening plate 3 of the present embodiment is provided with a weakened area at a position corresponding to the puncture portion 20, and the thickness of the weakened area is thinner than the thickness of the other portions of the valve-opening plate 3, so that the valve-opening plate 3 is punctured by the puncture portion 20 when the set temperature and/or pressure is reached. The position of the valve opening piece 3 corresponding to the puncture part 20 is additionally provided with a weak area, so that the puncture part 20 can puncture the valve opening piece 3 smoothly, the valve opening piece 3 can generate a breach, the thermal runaway prevention material is released to the battery from the breach of the valve opening piece 3 before the flammable and explosive gas, the effects of inflaming retarding and fire extinguishing are achieved, the combustible substance is blocked from further contacting with oxygen, and the flammable and explosive gas in the battery can not burn when being discharged into the internal space of the battery through the breach of the valve opening piece 3. The thickness of the weak area is thinner than that of other parts of the valve opening plate 3, so that the other parts of the valve opening plate 3 have enough strength, and the service life of the valve opening plate 3 is prolonged.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A top cover comprising the explosion-proof combination valve of the first embodiment.
Fifth embodiment
A top cover, comprising the explosion-proof combination valve of the second embodiment.
Sixth embodiment
A top cover, comprising the explosion-proof combination valve of the third embodiment.
Seventh embodiment
A battery comprising the cap of embodiment four, embodiment five, or 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 explosion-proof combination valve, 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);
the opening valve plate (3) is arranged at the bottom of the through hole (10);
the explosion-proof ring (1), the explosion-proof sheet (2) and the valve opening sheet (3) 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 surface of the explosion-proof piece (2) corresponding to the valve opening plate (3) is provided with a plurality of puncturing parts (20), and the puncturing parts (20) puncture the valve opening plate (3) under a set condition to release a thermal runaway prevention material to the battery.
2. An explosion-proof combination valve as defined in 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).
3. An explosion-proof combination valve as defined in claim 1, wherein: the bottom of the through hole (10) is provided with a groove (111), and the opening valve plate (3) is accommodated in the groove (111).
4. An explosion-proof combination valve as defined in claim 1, wherein: the explosion-proof piece (2) and the piercing part (20) are of an integrally formed structure, and one end of the piercing part (20) connected with the explosion-proof piece (2) is of a hollow structure or a solid structure.
5. An explosion proof combination valve as defined in claim 4, wherein: the explosion-proof combination valve further comprises a protective film (4), the protective film (4) is arranged at the top of the explosion-proof piece (2), and the area of the protective film (4) is larger than or equal to that of the explosion-proof piece (2).
6. An explosion proof combination valve as defined in claim 5, 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).
7. An explosion-proof combination valve as defined in claim 1, wherein: the opening valve plate (3) is provided with a weak area corresponding to the puncture part (20), and the thickness of the weak area is thinner than that of other parts of the opening valve plate (3), so that the opening valve plate (3) is punctured by the puncture part (20) when reaching a set temperature and/or pressure.
8. An explosion-proof combination valve as defined in claim 1, wherein: the puncture part (20) is conical or pyramid-shaped, and the thermal runaway prevention material is a flame retardant or a fire extinguishing agent.
9. A top cover, characterized in that: comprising an explosion proof combination valve as defined in any one of claims 1 to 8.
10. A battery, characterized by: comprising the overcap of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516220.5U CN214754053U (en) | 2021-03-11 | 2021-03-11 | Explosion-proof combination valve, top cap and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516220.5U CN214754053U (en) | 2021-03-11 | 2021-03-11 | Explosion-proof combination valve, top cap and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214754053U true CN214754053U (en) | 2021-11-16 |
Family
ID=78593451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120516220.5U Active CN214754053U (en) | 2021-03-11 | 2021-03-11 | Explosion-proof combination valve, top cap and battery |
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| CN (1) | CN214754053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441121A (en) * | 2022-11-08 | 2022-12-06 | 楚能新能源股份有限公司 | Battery module, battery package and electric motor car that delay thermal runaway |
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2021
- 2021-03-11 CN CN202120516220.5U patent/CN214754053U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441121A (en) * | 2022-11-08 | 2022-12-06 | 楚能新能源股份有限公司 | Battery module, battery package and electric motor car that delay thermal runaway |
| CN115441121B (en) * | 2022-11-08 | 2023-02-07 | 楚能新能源股份有限公司 | Battery module, battery package and electric motor car that delay thermal runaway |
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| GR01 | Patent grant | ||
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Effective date of registration: 20220110 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 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 |