CN216980715U - Top cover structure with flame-retardant function and battery - Google Patents
Top cover structure with flame-retardant function and battery Download PDFInfo
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- CN216980715U CN216980715U CN202120645014.4U CN202120645014U CN216980715U CN 216980715 U CN216980715 U CN 216980715U CN 202120645014 U CN202120645014 U CN 202120645014U CN 216980715 U CN216980715 U CN 216980715U
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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 26
- 239000000463 material Substances 0.000 claims abstract description 35
- 230000002265 prevention Effects 0.000 claims abstract description 23
- 230000009172 bursting Effects 0.000 claims abstract description 18
- 239000003063 flame retardant Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 238000004080 punching Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims 7
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- 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
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 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
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
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- 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
- QKBKGNDTLQFSEU-UHFFFAOYSA-N 2-bromo-3,3,3-trifluoroprop-1-ene Chemical compound FC(F)(F)C(Br)=C QKBKGNDTLQFSEU-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 238000005422 blasting Methods 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging 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
- 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
- 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
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Abstract
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a top cover structure with a flame retardant function and a battery, which comprise a top cover plate, wherein the top cover plate is provided with an explosion-proof hole, and the upper end and the lower end of the explosion-proof hole are respectively provided with an explosion-proof sheet and a valve opening sheet; the explosion-proof hole, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity, and a bursting structure is arranged in the explosion-proof hole; the valve opening sheet closes the explosion-proof hole under a normal state; the opening valve plate is punctured by the bursting structure under the set temperature and/or pressure, and the thermal runaway prevention material is released to the battery. The utility model can puncture the sealed cavity when thermal runaway occurs, release the thermal runaway prevention material, slow down the thermal runaway inside the battery and improve the safety of the battery.
Description
Technical Field
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a top cover structure with a flame-retardant function and a 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 objects of the present invention is: aiming at the defects of the prior art, the top cover structure with the flame retardant function is provided, the sealing cavity can be punctured when thermal runaway occurs, the thermal runaway-proof material is released, the thermal runaway inside the battery is slowed down, and the safety of the battery is improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a top cover structure with a flame retardant function comprises a top cover plate, wherein an explosion-proof hole is formed in the top cover plate, and an explosion-proof piece and a valve opening piece are respectively arranged at the upper end and the lower end of the explosion-proof hole; the explosion-proof hole, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity, and a bursting structure is arranged in the explosion-proof hole; the valve opening sheet closes the explosion-proof hole under a normal state; the opening valve plate is punctured by the bursting structure under the set temperature and/or pressure, and the thermal runaway prevention material is released to the battery.
Preferably, the bursting structure comprises a fixing frame and a punching knife/punching needle arranged below the fixing frame, a clamping groove used for installing the fixing frame is formed in the inner wall of the explosion-proof hole, and the clamping groove is arranged around the inner wall of the explosion-proof hole.
Preferably, the fixing frame comprises a cross rod and a longitudinal rod, at least one punching knife is arranged at the cross position of the cross rod, the longitudinal rod or the cross rod and the longitudinal rod, at least one punching knife is arranged in the middle of the cross rod, an upward convex body is arranged at the end part of the cross rod or the longitudinal rod, and the convex body abuts against the explosion-proof sheet.
Preferably, the top of the explosion-proof hole is provided with a step, and the explosion-proof sheet is arranged on the step.
Preferably, the bursting structure and the top cover sheet are of an integrated structure.
Preferably, the opening valve plate is provided with at least one weak area, and the thickness of the weak area is thinner than that of other parts of the opening valve plate.
Preferably, the bottom in explosion-proof hole is provided with the recess, open the valve piece embedded in the recess, open valve piece edge be provided with recess complex convex part, the convex part centers on open the valve piece sets up.
Preferably, the top cap structure 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.
Preferably, the top cap structure still includes the plastic part, the plastic part sets up the below of top cap piece, the top cap piece is provided with utmost point post through hole and annotates at least one kind in the liquid hole, the plastic part is provided with explosion-proof bleeder vent, utmost point post through-hole and annotates the liquid through-hole, explosion-proof bleeder vent corresponds the setting and is in the below in explosion-proof hole, utmost point post through-hole corresponds the setting and is in the below in utmost point post through-hole, it is in to annotate the liquid through-hole correspondence setting the below in liquid hole.
The second objective of the present invention is to provide a battery, which includes the above-mentioned top cover structure with flame retardant function.
The explosion-proof cover plate has the beneficial effects that the explosion-proof cover plate comprises a top cover plate, wherein an explosion-proof hole is formed in the top cover plate, and an explosion-proof piece and a valve opening piece are respectively arranged at the upper end and the lower end of the explosion-proof hole; the explosion-proof hole, the explosion-proof sheet and the valve opening sheet form a sealed cavity for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity, and a bursting structure is arranged in the explosion-proof hole; the valve opening sheet closes the explosion-proof hole under a normal state; the opening valve plate is punctured by the bursting structure under the set temperature and/or pressure, and the thermal runaway prevention material is released 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 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, an explosion-proof sheet and an opening valve sheet are respectively arranged at the upper end and the lower end of an explosion-proof hole to form a sealed cavity, a thermal runaway-proof material is contained in the sealed cavity, the opening valve sheet seals the explosion-proof hole under normal conditions, the thermal runaway-proof material is isolated from the internal electrolyte environment of the battery and the external environment of a top cover plate, when the internal pressure of the battery is large or the temperature is high when the battery is abnormal or the thermal runaway occurs, the battery is characterized in that a large amount of gas generated inside the battery is expanded, the valve block is internally opened under the high-temperature and high-pressure compression, the valve block is opened and deformed, the valve block collides with a bursting structure in the explosion-proof hole to be broken, a thermal runaway prevention material is released to the battery before flammable and explosive gas, the flame-retardant and fire-extinguishing effects are achieved, further contact between combustible and oxygen is blocked, when the flammable and explosive gas inside the battery is discharged into the internal space of the battery through a break opening of the valve block, combustion does not occur any more, meanwhile, the thermal runaway prevention material is further vaporized in a high-temperature environment to enter 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. The utility model can puncture the sealed cavity when thermal runaway occurs, release the thermal runaway prevention material, slow down the thermal runaway inside the battery and improve the safety of the 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 cross-sectional view of a first embodiment of the present invention.
Fig. 2 is an enlarged view of fig. 1 at a.
Fig. 3 is an exploded cross-sectional view of a first embodiment of the present invention.
Fig. 4 is a schematic structural view of a burst structure according to a first embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a second embodiment of the present invention.
Fig. 6 is an enlarged view of fig. 5 at B.
Fig. 7 is an exploded cross-sectional view of a second embodiment of the present invention.
Wherein the reference numerals are as follows:
1-a top cover sheet; 10-explosion-proof hole; 11-pole through hole; 12-liquid injection hole; 101-step; 103-a groove;
2-explosion-proof piece; 21-bulge;
3-opening the valve plate; 31-a convex portion;
4-sealing the cavity;
5-breaking the structure; 51-a fixed mount; 52-punching cutter; 511-a crossbar; 512-longitudinal bar;
6-a clamping groove;
7-convex body;
8-protective film;
9-plastic parts; 90-explosion-proof air holes; 91-pole through hole; 92-liquid injection through hole.
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 meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill 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
A top cover structure with a flame retardant function comprises a top cover plate 1 provided with an explosion-proof hole 10, wherein the upper end and the lower end of the explosion-proof hole 10 are respectively provided with an explosion-proof sheet 2 and a valve opening sheet 3; the explosion-proof hole 10, the explosion-proof sheet 2 and the opening valve sheet 3 form a sealed cavity 4 for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity 4, and a bursting structure 5 is installed in the explosion-proof hole 10; the opening valve plate 3 closes the explosion-proof hole 10 in a normal state; the opening valve plate 3 is punctured by the puncturing structure 5 under the set temperature and/or pressure, and the thermal runaway prevention material is released 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 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, an explosion-proof sheet 2 and a valve opening sheet 3 are respectively arranged at the upper end and the lower end of an explosion-proof hole 10 to form a sealed cavity 4, a thermal runaway material is contained in the sealed cavity 4, and in a normal state, the valve opening sheet 3 closes the explosion-proof hole 10 to isolate the thermal runaway material from the internal electrolyte environment of the battery and the external environment of a top cover sheet 1, when the battery is abnormal or thermally runaway, when the internal pressure or temperature of the battery is higher, a large amount of gas generated in the battery expands, the internal valve plate 3 is pressed by high temperature and high pressure, the opening valve plate 3 also expands and deforms, and collides with the burst structure 5 in the explosion-proof hole 10 to be broken, releases the thermal runaway-proof material to the battery before the flammable and explosive gas, not only plays the roles of flame retardance and fire extinguishment, but also blocks the further contact of the combustible and oxygen, so that the flammable and explosive gas in the battery does not burn when being discharged into the internal space of the battery through the opening of the valve plate 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 ensured to be rapidly reduced, the thermal runaway of the single battery is avoided, the bursting structure 5 can be designed to be made independently of parts, or can be integrally formed in the explosion-proof hole 10 of the top cover plate 1.
In the embodiment, the top cover sheet 1, the explosion-proof sheet 2 and the valve opening sheet 3 are fixed together to form a sealed space with better air tightness, so as to store the volatile thermal runaway prevention material; the opening valve plate 3 can be installed at the bottom of the explosion-proof hole 10, the bursting structure 5 is arranged above the opening valve plate 3, and when the opening valve plate 3 also generates bulging deformation, the bursting structure 5 punctures the opening valve plate 3 to release the thermal runaway-proof material.
In addition, the thermal runaway prevention material can be a flame retardant or a fire extinguishing agent, or a mixture of a flame retardant and a fire extinguishing agent, the flame retardant including but not limited to fluorocarbons, ketones, and the like, having a boiling point of 80 ℃ or less, being heat absorbable and being a nonflammable liquid; fire extinguishing agents include, but are not limited to, perfluorohexanone, monobromotrifluoropropene, hexafluoropropane, heptafluoropropane, and the like.
In the top cover structure with the flame retardant function according to the present invention, the bursting structure 5 comprises a fixed frame 51 and a punching knife 52/punching pin arranged below the fixed frame 51, a clamping groove 6 for mounting the fixed frame 51 is arranged on the inner wall of the explosion-proof hole 10, and the clamping groove 6 is arranged around the inner wall of the explosion-proof hole 10. Specifically, the clamping groove 6 on the inner wall of the explosion-proof hole 10 is matched with the end of the fixing frame 51 to play a role in fixing the position of the bursting structure 5 in the explosion-proof hole 10, and the fixing mode between the clamping groove 6 and the fixing frame 51 includes but is not limited to clamping, welding and riveting, and the fixing frame 51 can be fixed in the explosion-proof hole 10.
In the top cover structure with the flame retardant function according to the present invention, the fixing frame 51 includes a cross bar 511 and a longitudinal bar 512, at least one punch 52 is disposed at the cross point of the cross bar 511, the longitudinal bar 512 or the cross point of the cross bar 511 and the longitudinal bar 512, at least one punch 52 is disposed at the middle portion of the cross bar 511, a convex body 7 facing upward is disposed at the end portion of the cross bar 511 or the longitudinal bar 512, and the convex body 7 abuts against the explosion-proof sheet 2. Specifically, the transverse rods 511 and the longitudinal rods 512 form an integrated frame structure, and the position of the punch 52 in the explosion-proof hole 10 is fixed, the number of the punch 52 may be one or more, the distribution position may be in the middle, or may be in different positions, and is preferably set in the middle, wherein the fixing frame 51 and the punch 52 may be installed in the explosion-proof hole 10, or may be integrally formed with the explosion-proof hole 10, so as to improve the overall strength of the explosion-proof valve and reduce the production cost, the two may be metal or nonmetal, and the punch 52 may be set as other sharp objects having sharp protrusions, but the present invention is not limited thereto, and the number and the position of the transverse rods 511 and the longitudinal rods 512 may be adjusted according to the actual battery structure, so as to satisfy the structure of the valve sheet 3 to be punctured. Wherein, the cross bar 511 and the longitudinal bar 512 form a cross-shaped stamping knife rib, and are provided with four stamping knives 52; the convex body 7 is matched with the clamping groove 6 and is abutted against the explosion-proof sheet 2, and the effect of supporting the explosion-proof sheet 2 is achieved.
In the top cover structure having a flame retardant function according to the present invention, the top of the explosion-proof hole 10 is provided with a step 101, and the explosion-proof sheet 2 is mounted on the step 101. Specifically, the top of top cap piece 1 is sunken in to explosion vent 10 wall, is one deck echelonment, forms step 101 promptly, and step 101 all sets up around explosion vent 10, plays embedding explosion-proof piece 2's effect, avoids explosion-proof piece 2 to drop from top cap piece 1, can also improve the steadiness between explosion-proof piece 2 and the top cap piece 1.
In the top cover structure with flame retardant function according to the present invention, the bottom of the explosion-proof hole 10 is provided with a groove 103, the valve opening piece 3 is embedded in the groove 103, the edge of the valve opening piece 3 is provided with a protrusion 31 matching with the groove 103, and the protrusion 31 is arranged around the valve opening piece 3. Increase recess 103, make and open valve block 3 embedded in recess 103, be convenient for will open the bottom of valve block 3 welding at explosion-proof hole 10, realize opening valve block 3 promptly and top cap piece 1 formation integral type structure, help reducing the holistic thickness of top cap structure, can also prevent to open the probability that valve block 3 takes place to drop, increase convex part 31, can cooperate with recess 103, play the effect of fixed 3 positions of valve block of opening, and simultaneously, it is thinner to open other positions of valve block 3 and compare the position of convex part 31, help reducing the holistic manufacturing cost of valve block 3.
In the top cover structure with the flame retardant function, the top cover structure further comprises a protective film 8, the protective film 8 is arranged above the explosion-proof sheet 2, a protrusion 21 is arranged at the edge of the explosion-proof sheet 2, the protrusion 21 is arranged around the explosion-proof sheet 2, and the top of the protrusion 21 abuts against the protective film 8. The protective film 8 is made of plastic such as PET, PP, PE and the like, the connection mode of the protective film 8 and the explosion-proof sheet 2 comprises but is not limited to gluing or back glue arrangement on the top plane of the explosion-proof sheet 2, and the protective film 8 is used for preventing the fragile explosion-proof sheet 2 from being easily damaged by mistake when a battery contacts the outside, so that the service life of the explosion-proof sheet 2 is prolonged; increase protruding 21, play the effect that supports protection film 8 on the explosion-proof piece 2, avoid protection film 8 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 explosion-proof piece 2 and the protection film 8, prevent that explosion-proof piece 2 and protection film 8 from overlapping together, be convenient for dismantle and install explosion-proof piece 2 and protection film 8.
The working principle of the utility model is as follows:
the upper end and the lower end of the explosion-proof hole 10 are respectively provided with an explosion-proof sheet 2 and a valve opening sheet 3 to form a sealed cavity 4, the sealed cavity 4 is internally provided with a thermal runaway-proof material, the valve opening sheet 3 seals the explosion-proof hole 10 under normal conditions to isolate the thermal runaway-proof material from the electrolyte environment inside the battery and the outer side environment of the top cover sheet 1, when the battery has abnormal or thermal runaway, and the internal pressure or temperature of the battery is higher, a large amount of gas generated inside the battery swells, the high temperature and the high pressure press the internal valve sheet 3, the internal valve sheet 3 also swells and deforms and collides with the bursting structure 5 in the explosion-proof hole 10 to burst, the thermal runaway-proof material is released to the battery before the flammable and explosive gas, the functions of inflaming retarding and extinguishment are achieved, further contact between combustible and oxygen is blocked, and when the flammable and explosive gas inside the battery leaks into the internal space of the battery through a burst opening of the valve sheet 3, no longer take place the burning, the material of preventing thermal runaway simultaneously further vaporizes at high temperature environment, gets into the space at battery top, also can take away a large amount of heats to guarantee that battery cell temperature sharply descends, avoid battery cell thermal runaway's emergence, wherein, break through structure 5 can design into the independent preparation of part, also can adopt integrated into one piece in explosion-proof hole 10 of top cap piece 1.
Second embodiment
The difference from the first embodiment is that: the rupturing structure 5 and the top cover plate 1 of the present embodiment are integrally formed, and the valve-opening plate 3 is provided with at least one weak region having a thickness smaller than the thickness of the other part of the valve-opening plate 3. Burst structure 5 and top cap piece 1 adopt the integrated into one piece structure, can improve the holistic intensity of top cap structure, can also reduce the probability that burst structure 5 takes place to drop from top cap piece 1, increase the weak area, make burst structure 5 puncture more easily, the realization is released thermal runaway prevention material, it is too thick to avoid opening valve piece 3, be difficult to take place the blasting, influence explosion-proof material's release, be unfavorable for slowing down battery thermal runaway, the fire-retardant actual effect nature that leads to top cap structure is limited. In this embodiment, the crossbar 511 and the crossbar 512 form a cross die rib having one die 52.
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 top cover structure of this embodiment still includes plastic part 9, and plastic part 9 sets up in the below of top cap piece 1, and top cap piece 1 is provided with at least one of utmost point post through hole 11 and notes liquid hole 12, and plastic part 9 is provided with explosion-proof bleeder vent 90, utmost point post through-hole 91 and annotates liquid through-hole 92, and explosion-proof bleeder vent 90 corresponds the setting in the below of explosion-proof hole 10, and utmost point post through-hole 91 corresponds the setting in the below of utmost point post through-hole 11, annotates liquid through-hole 92 correspondence and sets up in the below of annotating liquid hole 12. The plastic part 9 plays the effect of interval top cap piece 1 and electric core, and explosion-proof bleeder vent 90 corresponds the below that sets up at explosion-proof hole 10, utmost point post through-hole 91 corresponds the below that sets up at utmost point post through hole 11, annotate the correspondence of liquid through-hole 92 and set up in the below of annotating liquid hole 12, be convenient for pass through annotate liquid hole 12 with electrolyte, pour into the battery inside, flame retardant function's header structure can be because cross-charging at the battery, cross-discharging, overflow and the battery internal short circuit leads to the battery to rise when ascending, make the automatic quick fire extinguishing of battery and cooling, avoid the battery explosion to lead to the emergence of incident, wherein, be equipped with protection film 8 on the explosion-proof piece 2, ensure that flame retardant function's header structure's function can realize.
Other structures are the same as those in the first embodiment, and are not described again here.
Example IV
A battery comprising the first embodiment top cover structure with flame retardant functionality.
Fifth embodiment
A battery comprising the top cover structure of embodiment two having a flame retardant function.
Sixth embodiment
A battery including the top cover structure having a flame retardant function of the third embodiment.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art to which the utility model pertains based upon the disclosure and teachings of the above specification. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, substitutions or alterations based on the present invention will fall within 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 (9)
1. A top cover structure with flame retardant function, comprising:
the top cover plate (1) is provided with an explosion-proof hole (10), and the upper end and the lower end of the explosion-proof hole (10) are respectively provided with an explosion-proof sheet (2) and a valve opening sheet (3);
The explosion-proof hole (10), the explosion-proof sheet (2) and the valve opening sheet (3) form a sealed cavity (4) for containing a thermal runaway prevention material, the thermal runaway prevention material is contained in the sealed cavity (4), and a bursting structure (5) is installed in the explosion-proof hole (10); the opening valve plate (3) closes the explosion-proof hole (10) in a normal state; the opening valve plate (3) is punctured by the puncturing structure (5) at a set temperature and/or pressure, and a thermal runaway prevention material is released to the battery;
the burst structure (5) comprises a fixing frame (51) and a punching knife (52)/a punching needle arranged below the fixing frame (51), a clamping groove (6) used for installing the fixing frame (51) is formed in the inner wall of the explosion-proof hole (10), and the clamping groove (6) surrounds the inner wall of the explosion-proof hole (10).
2. A roof construction having fire retardant functionality according to claim 1 wherein: the fixing frame (51) comprises a cross rod (511) and a longitudinal rod (512), at least one punching knife (52) is arranged at the cross position of the cross rod (511), the longitudinal rod (512) or the cross position of the cross rod (511) and the longitudinal rod (512), at least one punching knife (52) is arranged in the middle of the cross rod (511), an upward convex body (7) is arranged at the end part of the cross rod (511) or the longitudinal rod (512), and the convex body (7) is abutted to the explosion-proof sheet (2).
3. A roof structure with fire retardant function as claimed in claim 2, wherein: the top of explosion-proof hole (10) is provided with step (101), explosion-proof piece (2) are installed step (101).
4. A roof construction having fire retardant functionality according to claim 1 wherein: the bursting structure (5) and the top cover plate (1) are of an integrally formed structure.
5. A roof construction with fire retardant functionality according to any one of claims 1 to 4, wherein: the opening valve plate (3) is provided with at least one weak area, and the thickness of the weak area is thinner than that of other parts of the opening valve plate (3).
6. A roof construction with fire retardant functionality according to any one of claims 1 to 4, wherein: the bottom of explosion-proof hole (10) is provided with recess (103), open valve block (3) embedded in recess (103), open valve block (3) edge be provided with recess (103) complex convex part (31), convex part (31) center on open valve block (3) setting.
7. A roof construction with fire retardant functionality according to any one of claims 1 to 4, wherein: the top cap structure further comprises a protection film (8), the protection film (8) 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 protection film (8).
8. A roof construction with fire retardant functionality according to any one of claims 1 to 4, characterised in that: the top cap structure still includes plastic part (9), plastic part (9) set up the below of top cap piece (1), top cap piece (1) is provided with utmost point post through hole (11) and annotates at least one in liquid hole (12), plastic part (9) are provided with explosion-proof bleeder vent (90), utmost point post through-hole (91) and annotate liquid through-hole (92), explosion-proof bleeder vent (90) correspond the setting and are in the below of explosion-proof hole (10), utmost point post through-hole (91) correspond the setting and are in the below of utmost point post through-hole (11), it is in to annotate liquid through-hole (92) correspondence setting annotate the below of liquid hole (12).
9. A battery, characterized by: comprising the roof construction with fire retardant function according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120645014.4U CN216980715U (en) | 2021-03-30 | 2021-03-30 | Top cover structure with flame-retardant function and battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120645014.4U CN216980715U (en) | 2021-03-30 | 2021-03-30 | Top cover structure with flame-retardant function and battery |
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| Publication Number | Publication Date |
|---|---|
| CN216980715U true CN216980715U (en) | 2022-07-15 |
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| CN202120645014.4U Active CN216980715U (en) | 2021-03-30 | 2021-03-30 | Top cover structure with flame-retardant function and battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231223A (en) * | 2023-05-06 | 2023-06-06 | 江苏正力新能电池技术有限公司 | Top cap, battery and consumer |
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2021
- 2021-03-30 CN CN202120645014.4U patent/CN216980715U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231223A (en) * | 2023-05-06 | 2023-06-06 | 江苏正力新能电池技术有限公司 | Top cap, battery and consumer |
| CN116231223B (en) * | 2023-05-06 | 2023-07-25 | 江苏正力新能电池技术有限公司 | Top cap, battery and consumer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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 |