CN215008493U - Battery top cover structure for preventing battery thermal runaway and battery - Google Patents
Battery top cover structure for preventing battery thermal runaway and battery Download PDFInfo
- Publication number
- CN215008493U CN215008493U CN202120990744.8U CN202120990744U CN215008493U CN 215008493 U CN215008493 U CN 215008493U CN 202120990744 U CN202120990744 U CN 202120990744U CN 215008493 U CN215008493 U CN 215008493U
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- battery
- thermal runaway
- top cover
- hole
- sealing ring
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- 238000007789 sealing Methods 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 48
- 230000007306 turnover Effects 0.000 claims abstract description 44
- 230000002265 prevention Effects 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 17
- 230000000994 depressogenic effect Effects 0.000 claims description 15
- 239000003063 flame retardant Substances 0.000 claims description 9
- 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 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 15
- 239000002360 explosive Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 230000000979 retarding effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification 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
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 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
- 238000002955 isolation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a battery top cover structure for preventing thermal runaway of a battery and the battery, which comprises a top cover plate (1) provided with a turnover sheet (3); the groove plate (4) is arranged below the top cover plate (1); the top cover plate (1) and the groove plate (4) enclose a containing cavity (5), a thermal runaway prevention material is contained in the containing cavity (5), a sealing ring (31) is installed at the bottom of the turnover piece (3), and the groove plate (4) is provided with an air hole (40) matched with the sealing ring (31); the turnover sheet (3) at least partially abuts against the sealing ring (31) to keep the sealing ring (31) closed with the vent hole (40) in a normal state; the turnover sheet (3) deforms under preset pressure and/or temperature, so that a gap is formed between the sealing ring (31) and the air holes (40) and is used for releasing the thermal runaway prevention material into the battery. The utility model discloses can open automatically when thermal runaway and hold the chamber, release thermal runaway prevention material helps preventing that thermal runaway from stretching to whole battery package to improve the security of battery.
Description
Technical Field
The utility model belongs to the technical field of battery production manufacturing, concretely relates to prevent battery top cap structure and battery of battery thermal runaway.
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.
However, the lithium ion power battery has internal short circuit under extreme conditions, the temperature of the battery can rapidly rise and splash along with sparks; the electrolyte and other flammable and explosive substances in the battery are sprayed out to meet oxygen in the environment and combust, and the electrolyte and other flammable and explosive substances may spread to the whole vehicle to catch fire, thus endangering life and property safety; combustible electrolyte and active substances in a chemical system of the conventional lithium ion battery cannot be replaced, and local high temperature caused by short circuit is difficult to completely stop.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: to prior art's not enough, provide a prevent battery top cap structure of battery thermal runaway, can open automatically when thermal runaway and hold the chamber, release prevents the thermal runaway material, helps preventing that thermal runaway from stretching to whole battery package to improve the security of battery.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a battery top cover structure for preventing battery thermal runaway comprises a top cover plate provided with a turnover sheet; the groove plate is arranged below the top cover plate; the top cover plate and the groove plate are enclosed to form an accommodating cavity, a thermal runaway prevention material is accommodated in the accommodating cavity, a sealing ring is mounted at the bottom of the turnover sheet, and the groove plate is provided with air holes matched with the sealing ring; the turnover sheet at least partially abuts against the sealing ring so as to keep the sealing ring to seal the air hole under a normal state; the turnover sheet deforms under preset pressure and/or temperature, so that a gap is formed between the sealing ring and the air holes, and the turnover sheet is used for releasing the thermal runaway prevention material into the battery.
Preferably, still include solid fixed ring, gu fixed ring sets up the sealing washer with between the bleeder vent, gu fixed ring's one end with the bottom surface fixed connection of top cap piece, gu fixed ring's the other end with bleeder vent fixed connection.
Preferably, the top of fixed ring is outwards extended and is formed a plurality of jack catch, the jack catch centers on fixed ring sets up, the bottom surface of top cover plate be provided with jack catch complex concave part.
Preferably, the top of the fixing ring is provided with a groove matched with the sealing ring, the bottom of the sealing ring is embedded in the groove, and the top of the sealing ring is abutted to the turnover sheet.
Preferably, the top cover piece is provided with at least one of upset piece hole, utmost point post through-hole and notes liquid hole, the upset piece install in upset piece hole, utmost point post is installed to utmost point post through-hole, the frid is provided with annotates the liquid through-hole, it is provided with the boss to annotate the liquid through-hole, the boss centers on annotate the liquid through-hole setting, annotate the liquid hole the boss reaches it forms the notes liquid passageway to annotate the liquid through-hole.
Preferably, the top cover plate is further provided with an injection hole, and the injection hole is communicated with the accommodating cavity.
Preferably, the liquid injection hole and the injection hole are both provided with sealing nails.
Preferably, the bottom surface of top cap piece is provided with first depressed part, the frid is fixed in first depressed part is used for increasing hold the chamber volume, the edge of first depressed part is provided with the step, the step centers on first depressed part sets up, the bottom of utmost point post through-hole is provided with the second depressed part, utmost point post part inlay in the second depressed part.
Preferably, the top cover plate and the turnover plate are of an integrally formed structure.
Preferably, the thermal runaway prevention material is a flame retardant or a fire extinguishing agent.
A second object of the present invention is to provide a battery, including the above-mentioned battery top cap structure for preventing thermal runaway of the battery.
The utility model has the advantages that the utility model comprises a top cover plate which is provided with a turnover plate; the groove plate is arranged below the top cover plate; the top cover plate and the groove plate are enclosed to form an accommodating cavity, a thermal runaway prevention material is accommodated in the accommodating cavity, a sealing ring is mounted at the bottom of the turnover sheet, and the groove plate is provided with air holes matched with the sealing ring; the turnover sheet at least partially abuts against the sealing ring so as to keep the sealing ring to seal the air hole under a normal state; the turnover sheet deforms under preset pressure and/or temperature, so that a gap is formed between the sealing ring and the air holes, and the turnover sheet is used for releasing the thermal runaway prevention material into the battery. Because the lithium ion power battery has internal short circuit under extreme conditions, the temperature of the battery can be rapidly increased and splashed along with sparks; the electrolyte and other flammable and explosive substances in the battery are sprayed out to meet oxygen in the environment and combust, and the electrolyte and other flammable and explosive substances may spread to the whole vehicle to catch fire, thus endangering life and property safety; flammable electrolyte and active substance can not be replaced in the chemical system of the current lithium ion battery, and local high temperature caused by short circuit is difficult to completely stop, therefore, a containing cavity is enclosed by a top cover plate and a groove plate, a thermal runaway prevention material is contained in the containing cavity, the thermal runaway prevention material in the containing cavity is isolated from the electrolyte in the battery and the environment outside the top cover plate, a sealing ring is arranged at the bottom of a turnover plate, the groove plate is provided with air holes matched with the sealing ring, when the thermal runaway of the battery occurs, the turnover plate is subjected to upward air pressure entering from the air holes, the turnover plate is turned upwards to deform, the sealing ring rebounds after deformation and does not play a role of sealing the containing cavity, the thermal runaway prevention material in the containing cavity is vaporized under the action of temperature, enters the top space of a battery core through a gap between the sealing ring and the turnover plate, the effects of inflaming retarding and extinguishing the thermal runaway battery are achieved, if the internal pressure of the battery core is increased continuously, stress concentration is formed at the edge deformation position of the turnover piece to generate a break, the thermal runaway prevention material enters the battery pack environment through the break to replace oxygen in the battery pack environment, and the probability that inflammable and explosive gas in the battery core leaks into the battery pack through the break to be combusted is reduced; the accommodating cavity is closed under the normal use condition, and the thermal runaway prevention material can be stably stored in the accommodating cavity and is not contacted with the external environment or electrolyte in the battery; in case electric core takes place the thermal runaway, takes place deformation through the upset piece, opens automatically and holds the chamber, and the material of preventing the thermal runaway begins to play fire-retardant and the effect of putting out a fire, prevents that the thermal runaway from stretching to whole battery package. The utility model discloses can open automatically when thermal runaway and hold the chamber, release thermal runaway prevention material helps preventing that thermal runaway from stretching to whole battery package to 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 bottom structure diagram of a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a first embodiment of the present invention.
Fig. 4 is a schematic top structure view of a top cover sheet according to a first embodiment of the present invention.
Fig. 5 is a schematic bottom structure view of a top cover plate according to a first embodiment of the present invention.
Fig. 6 is a schematic structural view of a fixing ring according to a first embodiment of the present invention.
Fig. 7 is a schematic top structure view of a slot plate according to a first embodiment of the present invention.
Fig. 8 is a schematic bottom structure view of a slot plate according to a first embodiment of the present invention.
Fig. 9 is a schematic view of the flip sheet according to the first embodiment of the present invention in a normal state.
Fig. 10 is a schematic view of the turning sheet according to the first embodiment of the present invention in a thermal runaway state.
Fig. 11 is a schematic bottom structure view of a top cover sheet according to a fourth embodiment of the present invention.
Fig. 12 is a schematic sectional view of a top cover sheet according to a fourth embodiment of the present invention.
Wherein the reference numerals are as follows:
1-top cover sheet; 11-turning over the sheet hole; 12-pole through hole; 13-liquid injection hole; 14-an injection hole; 15-a first recess; 16-a second recess; 17-a recess; 151-step;
2-pole column;
3-turning over the sheet; 31-a sealing ring;
4-a groove plate; 40-air holes; 41-liquid injection through holes; 411-boss;
5-an accommodating cavity;
6-fixing the ring; 61-claw; 62-groove.
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 12, but the present invention is not limited thereto.
Implementation mode one
A battery top cover structure for preventing battery thermal runaway comprises a top cover plate 1 provided with a turnover sheet 3; the groove plate 4 is arranged below the top cover plate 1; the top cover plate 1 and the groove plate 4 are enclosed to form an accommodating cavity 5, a thermal runaway preventing material is accommodated in the accommodating cavity 5, the bottom of the turnover sheet 3 is provided with a sealing ring 31, and the groove plate 4 is provided with an air hole 40 matched with the sealing ring 31; the turnover sheet 3 at least partially abuts against the sealing ring 31 to keep the sealing ring 31 to seal the air hole 40 under a normal state; the turnover sheet 3 deforms at a preset pressure and/or temperature to form a gap between the sealing ring 31 and the air vent 40, so that the thermal runaway prevention material is released into the battery.
Because the lithium ion power battery has internal short circuit under extreme conditions, the temperature of the battery can be rapidly increased and splashed along with sparks; the electrolyte and other flammable and explosive substances in the battery are sprayed out to meet oxygen in the environment and combust, and the electrolyte and other flammable and explosive substances may spread to the whole vehicle to catch fire, thus endangering life and property safety; flammable electrolyte and active substances in a chemical system of a current lithium ion battery cannot be replaced, and local high temperature caused by short circuit is difficult to completely stop, so that as shown in fig. 1 to 10, a containing cavity 5 is enclosed by a top cover sheet 1 and a groove plate 4, a thermal runaway prevention material is contained in the containing cavity 5, the thermal runaway prevention material in the containing cavity 5 is isolated from the electrolyte in the battery and the environment outside the top cover sheet 1, a sealing ring 31 is installed at the bottom of an overturning sheet 3, the groove plate 4 is provided with an air vent 40 matched with the sealing ring 31, when the battery is in thermal runaway, the overturning sheet 3 is subjected to upward air pressure entering from the air vent 40, the overturning sheet 3 overturns upwards and deforms, the sealing ring 31 rebounds after deformation and does not play a role in sealing the containing cavity 5 any more, the thermal runaway prevention material in the containing cavity 5 is vaporized under the action of temperature, and enters into the top space of the battery core through a gap between the sealing ring 31 and the overturning sheet 3, the thermal runaway battery has the effects of inflaming retarding and fire extinguishing, if the internal pressure of the battery core is continuously increased, stress concentration is formed at the edge deformation position of the turnover piece 3 to generate a crevasse, the thermal runaway prevention material enters the battery pack environment through the crevasse, oxygen in the battery pack environment is replaced, and the probability that inflammable and explosive gas in the battery core leaks into the battery pack through the crevasse to be combusted is reduced; the accommodating cavity 5 is closed under normal use conditions, and the thermal runaway prevention material can be stably stored in the accommodating cavity 5 and is not contacted with the external environment or electrolyte in the battery; in case electric core takes place thermal runaway, takes place deformation through upset piece 3, opens automatically and holds chamber 5, and the material of preventing thermal runaway begins to play fire-retardant and the effect of putting out a fire, prevents that thermal runaway from stretching to whole battery package.
In this embodiment, see fig. 7 and 8 and show, frid 4 is the rectangle disk body structure, has the groove edge, can enclose with top sheet 1 bottom surface and become to hold chamber 5, and frid 4 is connected through laser welding with top sheet 1 all around, makes the thermal runaway prevention material that holds chamber 5 and electrolyte in the battery, top sheet 1 outside environment isolation, nevertheless the utility model discloses not so limit, according to actual cost demand, frid 4 all around and top sheet 1 between also can adopt joint, bonding or riveting, satisfy the requirement of the leakproofness that holds chamber 5 can.
According to the utility model discloses an among the battery top cap structure that prevents battery thermal runaway, see that fig. 3 shows, still including solid fixed ring 6, gu fixed ring 6 sets up between sealing washer 31 and bleeder vent 40, gu fixed ring 6's one end and the bottom surface fixed connection of top cap piece 1, gu fixed ring 6's the other end and bleeder vent 40 fixed connection. Increase solid fixed ring 6, can fix the position of sealing washer 31 in holding chamber 5, reduce the probability that sealing washer 31 takes place the displacement or rocks, it is specific, through welded fastening between solid fixed ring 6 and the top sheet 1, the inside and outside gas tightness of sealing washer 31 is guaranteed to the compression capacity of its welding plane height control sealing washer 31. Wherein, the inner wall of bleeder vent 40 and the unsmooth cooperation of the bottom of solid fixed ring 6 play the effect of the 6 positions of injecing solid fixed ring, reduce solid fixed ring 6 and take place rotatory probability.
In the utility model discloses an among the battery top cap structure that prevents battery thermal runaway, refer to fig. 6 and show, the top of solid fixed ring 6 is outwards extended and is formed a plurality of jack catch 61, and jack catch 61 sets up around solid fixed ring 6, and the bottom surface of top sheet 1 is provided with the concave part 17 with jack catch 61 complex. In this embodiment, the top of solid fixed ring 6 is outwards extended and is formed a plurality of jack catch 61, 6 integrated into one piece are fixed to a plurality of jack catch 61 accessible, or weld jack catch 61 in solid fixed ring 6, jack catch 61 cooperates the concave part 17 of top sheet 1 bottom surface, jack catch 61 and the unsmooth cooperation of concave part 17, realize the fixed connection between solid fixed ring 6 and the top sheet 1, at this moment, sealing washer 31 is in compression state, certain resilience force has, and solid fixed ring 6 can bear certain pulling force with the laser welding seal of top sheet 1, avoid sealing washer 31 to take place to drop, or produce the condition in clearance under normal condition between sealing washer 31 and the upset piece 3, but the utility model discloses not use this as the limit, according to actual battery model and cost, gu fixed ring 6's top still can set up other fixed connection, it can to satisfy to prevent solid fixed ring 6 from taking place the rotation. In addition, a gap is formed between the adjacent clamping jaws 61, the thermal runaway prevention material can contact the sealing ring 31 from the gap, and in a normal state, no gap exists between the turnover piece 3 and the sealing ring 31, so that the thermal runaway prevention material is prevented from leaking.
In the battery top cover structure for preventing thermal runaway of the battery according to the present invention, as shown in fig. 3, the top of the fixing ring 6 is provided with a groove 62 engaged with the sealing ring 31. Increase recess 62, play the effect of holding sealing washer 31, it is concrete, sealing washer 31 is the ring shape, and recess 62 also is the ring shape, and sealing washer 31 embedding recess 62 not only plays the effect of fixed seal 31 position, still helps reducing the overall height of frid 4 to reduce the holistic height of battery top cap, reduce the battery top cap and invade and account for the inside space of battery, still help improving the energy density of battery.
According to the utility model discloses an among the battery top cap structure that prevents battery thermal runaway, see that fig. 1 and fig. 2 are shown, top cap piece 1 is provided with upset piece hole 11, utmost point post through-hole 12 and annotates at least one of liquid hole 13, and upset piece 3 is installed in upset piece hole 11, and utmost point post 2 is installed to utmost point post through-hole 12, and frid 4 is provided with annotates liquid through-hole 41, and it is provided with boss 411 to annotate liquid through-hole 41, and boss 411 sets up around annotating liquid through-hole 41, annotates liquid hole 13, boss 411 and annotate liquid through-hole 41 and form the notes liquid passageway. The turnover piece holes 11 are additionally arranged, so that the turnover piece 3 is limited, the battery is decompressed, the thermal runaway prevention material enters the battery pack environment through a gap generated at the edge of the turnover piece 3, oxygen in the battery pack environment is replaced, and the probability that inflammable and explosive gas in the battery core is combusted due to the fact that the inflammable and explosive gas is leaked into the battery pack through the gap is reduced; the pole through hole 12 is added to play a role in fixing the pole 2, and meanwhile, a plastic part is arranged between the pole 2 and the pole through hole 12, so that the situation of short circuit caused by direct contact between the pole 2 and the pole through hole 12 is avoided; increase and annotate liquid hole 13, be convenient for toward the inside electrolyte that injects of battery, wherein, annotate liquid hole 13, boss 411 and annotate liquid through-hole 41 and form and annotate the liquid passageway, and is concrete, the bottom surface of top cover piece 1 and the boss 411 welding of annotating liquid through-hole 41, when annotating liquid for electric core, inside electrolyte got into electric core, and can not get into and hold chamber 5, avoided electrolyte and thermal runaway material to react, influence the effect of thermal runaway material.
According to the utility model discloses an among the battery top cap structure that prevents battery thermal runaway, top sheet 1 still is provided with filling hole 14, and filling hole 14 intercommunication holds chamber 5. Increase injection hole 14, be convenient for to the interior injection of thermal runaway material of preventing that holds chamber 5, help guaranteeing the injection efficiency of thermal runaway material, wherein, the quantity and the size of injection hole 14 can be adjusted according to the size and the manufacturing cost of actual battery.
The utility model discloses a theory of operation is:
a containing cavity 5 is enclosed by a top cover plate 1 and a groove plate 4, a thermal runaway prevention material is contained in the containing cavity 5, the thermal runaway prevention material in the containing cavity 5 is isolated from electrolyte in a battery and the environment outside the top cover plate 1, a sealing ring 31 is installed at the bottom of an overturning sheet 3, the groove plate 4 is provided with an air vent 40 matched with the sealing ring 31, when the thermal runaway of the battery occurs, the overturning sheet 3 is subjected to upward air pressure entering from the air vent 40, the overturning sheet 3 overturns upwards to deform, the sealing ring 31 rebounds after deformation and does not play a role of sealing the containing cavity 5, the thermal runaway prevention material in the containing cavity 5 is vaporized under the action of temperature, the thermal runaway prevention material enters the top space of the battery core through a gap between the sealing ring 31 and the overturning sheet 3, the effects of inflaming retarding and fire extinguishing are performed on the thermal runaway battery, if the internal pressure of the battery core continues to increase, a stress concentration is formed at the edge deformation position of the overturning sheet 3 to generate a break, and the thermal runaway prevention material enters the battery pack environment through the break, oxygen in the battery pack environment is replaced, and the probability that flammable and explosive gas in the battery cell leaks into the battery pack through the opening to be combusted is reduced; the accommodating cavity 5 is closed under normal use conditions, and the thermal runaway prevention material can be stably stored in the accommodating cavity 5 and is not contacted with the external environment or electrolyte in the battery; in case electric core takes place thermal runaway, takes place deformation through upset piece 3, opens automatically and holds chamber 5, and the material of preventing thermal runaway begins to play fire-retardant and the effect of putting out a fire, prevents that thermal runaway from stretching to whole battery package.
Second embodiment
The difference from the first embodiment is that: the bottom of the sealing ring 31 of this embodiment is embedded in the groove 62, the top of the sealing ring 31 abuts against the turnover sheet 3, the bottom surface of the top cover sheet 1 is provided with a first recessed portion 15, the groove plate 4 is fixed in the first recessed portion 15 for increasing the volume of the accommodating cavity 5, the bottom of the pole through hole 12 is provided with a second recessed portion 16, and the pole 2 is partially embedded in the second recessed portion 16. In the embodiment, the bottom of the sealing ring 31 is embedded in the groove 62, the top of the sealing ring 31 abuts against the turnover sheet 3, when the thermal runaway of the battery occurs, the turnover sheet 3 is subjected to upward air pressure, the turnover sheet 3 turns upwards to deform, the sealing ring 31 rebounds after deformation and does not play a role in sealing the accommodating cavity 5, the thermal runaway preventing material in the accommodating cavity 5 is vaporized under the action of temperature, and enters the top space of the battery core through the gap between the sealing ring 31 and the turnover sheet 3, so that the flame retardant and fire extinguishing effects on the thermal runaway battery are achieved; the first concave part 15 is added, and the groove plate 4 with higher height can be installed within the height allowable range of the top cover plate 1, namely, the integral volume of the accommodating cavity 5 is increased, so that the accommodating cavity 5 formed by the top cover plate 1 and the groove plate 4 can accommodate more thermal runaway prevention materials, and the flame-retardant and fire-extinguishing effects of the thermal runaway battery are improved; increase second depressed part 16, make utmost point post 2 part inlay in second depressed part 16, can reduce the holistic height of battery top cap, reduce the battery top cap and invade the inside space of battery, help improving the energy density of battery.
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 plate 1 and the turnover plate 3 of the embodiment are of an integrally formed structure, the liquid injection hole 13 and the injection hole 14 are both provided with sealing nails, and the thermal runaway prevention material is a flame retardant or a fire extinguishing agent. According to the requirements of actual production and cost, the top cover plate 1 and the turnover piece 3 can also adopt an integrated punch forming structure, so that the phenomenon that the turnover piece 3 is welded on the top cover plate 1 is eliminated, the whole production cost of the battery top cover is favorably reduced, the production process can be simplified, the production efficiency is improved, the sealing nails are added, the sealing performance of electrolyte and a thermal runaway prevention material can be ensured, and the leakage probability of the electrolyte or the thermal runaway prevention material is reduced; fire extinguishing agents include, but are not limited to, perfluorohexanone, bromotrifluoropropene, hexafluoropropane, heptafluoropropane, and the like.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
The difference from the second embodiment is that: referring to fig. 11 and 12, the edge of the first recess 15 of the present embodiment is provided with a step 151, and the step 151 is provided around the first recess 15. Specifically, step 151 can weld in the position of top sheet 1 to frid 4 and carry on spacingly, reduce frid 4 probability that takes place horizontal displacement, and simultaneously, set up step 151, help deepening first depressed part 15, in the high allowed range of top sheet 1, can increase and hold the holistic volume in chamber 5, make top sheet 1 and frid 4 enclose hold chamber 5 and can hold more anti-thermal runaway materials, help improving the effect of carrying out fire-retardant and putting out a fire to the thermal runaway battery.
Other structures are the same as those of the second embodiment, and are not described herein again.
Fifth embodiment
A battery comprising the battery top cap structure of embodiment one that prevents thermal runaway of the battery.
Sixth embodiment
A battery comprising the battery top cap structure of embodiment two that prevents thermal runaway of the battery.
Seventh embodiment
A battery comprising the battery top cap structure of embodiment three that prevents thermal runaway of the battery.
Embodiment eight
A battery comprising the battery top cap structure of embodiment four that prevents thermal runaway of the battery.
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 battery top cap structure for preventing thermal runaway of a battery, comprising:
the top cover plate (1) is provided with a turnover plate (3);
the groove plate (4) is arranged below the top cover plate (1);
the top cover plate (1) and the groove plate (4) enclose a containing cavity (5), a thermal runaway prevention material is contained in the containing cavity (5), a sealing ring (31) is installed at the bottom of the turnover piece (3), and the groove plate (4) is provided with an air hole (40) matched with the sealing ring (31); the turnover sheet (3) at least partially abuts against the sealing ring (31) to keep the sealing ring (31) closed with the vent hole (40) in a normal state; the turnover sheet (3) deforms under preset pressure and/or temperature, so that a gap is formed between the sealing ring (31) and the air holes (40) and is used for releasing the thermal runaway prevention material into the battery.
2. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 1, wherein: still including solid fixed ring (6), gu fixed ring (6) set up sealing washer (31) with between bleeder vent (40), gu the one end of fixed ring (6) with the bottom surface fixed connection of top sheet (1), gu the other end of fixed ring (6) with bleeder vent (40) fixed connection.
3. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 2, wherein: the top of solid fixed ring (6) is toward outwards extending and is formed a plurality of jack catch (61), jack catch (61) center on solid fixed ring (6) set up, the bottom surface of top cover piece (1) be provided with jack catch (61) complex concave part (17).
4. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 2, wherein: the top of the fixing ring (6) is provided with a groove (62) matched with the sealing ring (31), the bottom of the sealing ring (31) is embedded in the groove (62), and the top of the sealing ring (31) is abutted to the turnover sheet (3).
5. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 1, wherein: top cap piece (1) is provided with upset piece hole (11), utmost point post through-hole (12) and annotates at least one of liquid hole (13), upset piece (3) install in upset piece hole (11), utmost point post (2) are installed to utmost point post through-hole (12), frid (4) are provided with annotates liquid through-hole (41), it is provided with boss (411) to annotate liquid through-hole (41), boss (411) center on annotate liquid through-hole (41) setting, annotate liquid hole (13) boss (411) reach it forms liquid channel to annotate liquid through-hole (41).
6. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 5, wherein: the top cover plate (1) is further provided with an injection hole (14), the injection hole (14) is communicated with the accommodating cavity (5), and the injection hole (13) and the injection hole (14) are provided with sealing nails.
7. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 5, wherein: the bottom surface of top cap piece (1) is provided with first depressed part (15), frid (4) are fixed in first depressed part (15) are used for increasing hold chamber (5) volume, the edge of first depressed part (15) is provided with step (151), step (151) center on first depressed part (15) set up, the bottom of utmost point post through-hole (12) is provided with second depressed part (16), utmost point post (2) part inlay in second depressed part (16).
8. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 1, wherein: the top cover sheet (1) and the turnover sheet (3) are of an integrally formed structure.
9. The battery top cover structure for preventing thermal runaway of a battery as defined in claim 1, wherein: the thermal runaway prevention material is a flame retardant or a fire extinguishing agent.
10. A battery comprising the battery top cover structure for preventing thermal runaway of the battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120990744.8U CN215008493U (en) | 2021-05-11 | 2021-05-11 | Battery top cover structure for preventing battery thermal runaway and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120990744.8U CN215008493U (en) | 2021-05-11 | 2021-05-11 | Battery top cover structure for preventing battery thermal runaway and battery |
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| Publication Number | Publication Date |
|---|---|
| CN215008493U true CN215008493U (en) | 2021-12-03 |
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| CN202120990744.8U Active CN215008493U (en) | 2021-05-11 | 2021-05-11 | Battery top cover structure for preventing battery thermal runaway and battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937841A (en) * | 2022-05-24 | 2022-08-23 | 厦门海辰新能源科技有限公司 | Sealing structure of battery, end cover assembly, shell, battery and disassembling method |
| CN115425342A (en) * | 2022-09-23 | 2022-12-02 | 江苏正力新能电池技术有限公司 | Battery safety structure and battery |
| CN115548542A (en) * | 2022-11-09 | 2022-12-30 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, battery pack and electric equipment |
-
2021
- 2021-05-11 CN CN202120990744.8U patent/CN215008493U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937841A (en) * | 2022-05-24 | 2022-08-23 | 厦门海辰新能源科技有限公司 | Sealing structure of battery, end cover assembly, shell, battery and disassembling method |
| CN115425342A (en) * | 2022-09-23 | 2022-12-02 | 江苏正力新能电池技术有限公司 | Battery safety structure and battery |
| CN115548542A (en) * | 2022-11-09 | 2022-12-30 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, battery pack and electric equipment |
| CN115548542B (en) * | 2022-11-09 | 2024-02-06 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, battery pack and electric equipment |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220125 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 211100 Lantian Road 249, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN 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 |