CN112467285A - Battery module for delaying thermal runaway and vehicle using same - Google Patents
Battery module for delaying thermal runaway and vehicle using same Download PDFInfo
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- CN112467285A CN112467285A CN202011467698.XA CN202011467698A CN112467285A CN 112467285 A CN112467285 A CN 112467285A CN 202011467698 A CN202011467698 A CN 202011467698A CN 112467285 A CN112467285 A CN 112467285A
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- Prior art keywords
- thermal runaway
- end plate
- battery module
- sealing
- housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention provides a battery module for delaying thermal runaway and a vehicle using the same, belonging to the field of lithium ion battery detection and comprising a box body and a plurality of thermal runaway sealing assemblies, wherein the plurality of thermal runaway sealing assemblies are identical in structure and are arranged in the box body side by side, and adjacent thermal runaway sealing assemblies are electrically connected to form the module; the box body comprises a front end plate and a rear end plate; the thermal runaway sealing assembly comprises a housing and at least two electric cores, foam for buffering and heat insulation is arranged between the adjacent electric cores, the housing is coated on the outer sides of the electric cores, the upper end of the housing is sealed, and openings on two sides of the housing are arranged and correspond to the front end plate and the rear end plate of the box body; each thermal runaway seal assembly forms an independently sealed unit with the front end plate and the rear end plate. The invention effectively slows down the thermal runaway speed of the module and effectively slows down the thermal spread.
Description
Technical Field
The invention belongs to the field of lithium ion battery detection, relates to a lithium ion battery of a new energy automobile, and particularly relates to a battery module for delaying thermal runaway and a vehicle using the battery module.
Background
The lithium ion battery has the advantages of light weight, low cost, high capacity, long cycle life and the like, is widely applied to various fields of new energy automobiles, aerospace and the like, and the thermal runaway risk shows an ascending trend along with the increasing increase of the energy density of the battery, wherein the thermal runaway of the battery means that the current and the temperature of the battery generate an accumulative enhancement effect and are gradually damaged when the storage battery is charged at constant voltage.
When soft package electric core thermal runaway in the battery module, no thermal isolation and independent seal structure exist between electric cores, the thermal runaway rapidly spreads to cause abnormal rise of temperature, chemical reactions can occur one by one to form a chain reaction, a thermal-temperature-reaction (HTR) cycle is the root cause of the chain reaction, the abnormal heating brings the temperature rise of the electric core, and side reactions are started, such as SEI decomposition, the side reactions release more heat to form the HTR cycle. The TR circulation is circulated at a very high temperature until the battery core undergoes temperature-reaction to damage the battery, so that great potential safety hazard is caused, the time for spreading the thermal runaway is prolonged, the thermal runaway speed is controlled, more time is provided for safety escape, and the safety is favorably improved.
Disclosure of Invention
The invention aims to provide a battery module for delaying thermal runaway and a vehicle using the same, which are simple to operate, rapid in detection and high in efficiency, can eliminate the influence of human factors and are more accurate.
In order to solve the technical problems, the invention adopts the technical scheme that: the battery module comprises a box body and a plurality of thermal runaway sealing assemblies, wherein the thermal runaway sealing assemblies are identical in structure and are arranged in the box body side by side, and adjacent thermal runaway sealing assemblies are electrically connected to form a module;
the box body comprises a front end plate and a rear end plate;
the thermal runaway sealing assembly comprises a housing and at least two electric cores, foam for buffering and heat insulation is arranged between every two adjacent electric cores, the housing is coated on the outer sides of the electric cores, the upper end of the housing is sealed, and openings on two sides of the housing are arranged and correspond to a front end plate and a rear end plate of the box body;
each thermal runaway seal assembly forms an independently sealed unit with the front end plate and the rear end plate.
Furthermore, the box still includes upper cover and lower casing, the casing is tetragonal groove structure down, front end plate and back end plate parallel arrangement conduct the both sides of casing down, the thermal runaway seal assembly perpendicular to front end plate and back end plate set up.
Further, the upper cover is formed by bending steel, the thickness of the upper cover is 0.5mm-1mm, the lower shell is of an integrated structure formed by welding aluminum profiles, and the upper cover and the lower shell are fixed into a whole through riveting or welding.
Furthermore, an upper aerogel layer is arranged between the upper end face of the housing and the box body, the upper aerogel layer is integrally adhered to the top of each housing and is arranged in a uniform thickness mode, the area of the upper aerogel layer is the same as that of the top of the housing, and the upper aerogel layer is a back adhesive sheet with the thickness of 1-2 mm.
Furthermore, all be equipped with a plurality of exhaust holes on front end plate and the back end plate, the exhaust hole on the front end plate and the exhaust hole on the back end plate correspond the fore-and-aft both ends of housing in the thermal runaway seal assembly respectively, every the exhaust hole corresponds the setting have the shutoff steel sheet.
Furthermore, the plugging steel sheet is fixed at the exhaust hole through an adhesive or a clamping hook structure, and can only be opened from inside to outside under the action of internal pressure generated by the thermal runaway sealing assembly.
Further, front end plate and back end plate are multilayer sheet structure, the multilayer structure of front end plate and back end plate is the same, dust-proof membrane, mica sheet and side aerogel layer have set gradually from outside to inside in the inboard of front end plate, be equipped with on mica sheet and the side aerogel layer with the hole of keeping away that the air vent corresponds.
Furthermore, the dustproof film is a sheet film with the thickness of 0.1-0.2mm, the back glue of the dustproof film is adhered to the inner side of the front end plate to prevent external dust and foreign matters from entering the thermal runaway sealing assembly, and meanwhile, when the thermal runaway sealing assembly is at high temperature, the dustproof film is melted to ensure that thermal substances in the thermal runaway sealing assembly are discharged through the dustproof film.
Furthermore, the mica sheet is formed by pressing a phlogopite material with the thickness of 1-2mm into a sheet, the mica sheet is back glued on two sides, one side of the mica sheet is bonded on the inner side of the dustproof film to be fixed, and the other side of the mica sheet is bonded with the side aerogel layer to resist the direct high-temperature impact of hot substances on the front end plate and/or the rear end plate when thermal runaway is caused, so that the damage of the front end plate and/or the rear end plate is delayed.
Furthermore, the side aerogel layer is of a 1-2mm sheet structure, when the side aerogel layer is combined with the mica sheet to resist thermal runaway, thermal substances in the battery module impact the front end plate and the rear end plate, the side aerogel layer is tightly combined with the two ends of the housing in an interference fit manner to eliminate assembly gaps, so that the sealing performance of the two sides of the thermal runaway sealing assembly is guaranteed, and thermal substance communication between the thermal runaway sealing assemblies is prevented.
Furthermore, the foam is UL 94-V0-grade flame-retardant heat-insulation silica gel foam, and the foam provides 0-80% of compression resilience amount for the expansion of the battery cell and provides a breathing space for the battery cell.
Furthermore, the adjacent thermal runaway sealing assembly is also provided with foam to delay or prevent heat from being transmitted into the thermal runaway sealing assembly from the top and the side wall of the thermal runaway sealing assembly during thermal runaway.
Furthermore, the edge sealing position of the top of the battery cell is provided with heat insulation glue for sealing, and the heat insulation glue is modified organic silica gel.
Furthermore, the housing is U-shaped with a downward opening, openings are formed in two ends of the housing, and the upper ends of the openings of the two adjacent housings in the longitudinal direction are clamped, blocked and connected through the clamping piece.
Further, the card is the sheet metal construction, the card is the structure of nearly font, one side of card is equipped with two long locating claws, every the both sides of long locating claw all are equipped with two short locating claws, and two long locating claws set up respectively in the top outside of two adjacent housings, short locating claw establishes the inboard at housing top.
Furthermore, the two longitudinal ends of the thermal runaway sealing assembly are provided with an electric core tab insulating part on one side and an electric connection insulating part on the other side, and the outer side of the electric connection insulating part is provided with a sealing aerogel rubber strip.
Furthermore, the thermal runaway sealing assembly is tightly combined with the front end plate and the rear end plate, and the bottom of the thermal runaway sealing assembly is firmly bonded with the bottom of the box body by using heat-conducting structural adhesive to form a relatively independent sealing structure.
Furthermore, a heat insulation glue is arranged between the top of the housing and the battery core, and the heat insulation glue is coated inside the housing and is adhered to the housing and the battery core into an integral structure.
A vehicle uses a battery module that delays thermal runaway.
Compared with the prior art, the invention has the following advantages and positive effects.
1. According to the invention, not only can the thermal diffusion between the out-of-control sealed single components be effectively slowed down, but also the thermal substances sprayed can only be sprayed out from the lugs at two sides when the electric core in the out-of-control sealed single components is out of control, namely the thermal substances are sprayed out from the openings at two sides of the housing, so that the directional and orderly delayed spraying of the out-of-control sealed components in the battery module is realized, only smoke is emitted within 10 minutes of the module, the fire and explosion do not occur, the time for escaping is provided as much as possible, and the safety coefficient under the unexpected condition is improved;
2. according to the invention, a U-shaped cover shell wraps a soft package battery cell structure, thermal runaway seal assemblies with thermal runaway eruption guide are formed in a battery module independently, and one thermal runaway seal assembly cannot spread to other thermal runaway seal assemblies immediately after thermal runaway, so that the thermal runaway speed of the soft package battery cell module is effectively slowed down, thermal spread is effectively slowed down, and the eruption direction of the soft package battery during thermal runaway is effectively controlled;
3. according to the invention, a heat insulation glue is arranged between the top of the housing and the electric core, the heat insulation glue plays a role in fixing the electric core and the U-shaped housing while playing a role in heat insulation, an aerogel layer is bonded on the outer side of the top of the U-shaped housing, the upper aerogel layer is a gum sheet with the thickness of 1-2mm, the upper aerogel layer is integrally bonded on the top of the U-shaped housing in each thermal runaway sealing assembly, the upper part of the upper aerogel layer is tightly pressed by an upper cover, and the heat insulation glue on the upper aerogel layer, the upper cover and the inner side of the top of the U-shaped housing plays a role in top heat insulation on the top;
4. in the invention, foam cotton for buffering and heat insulation is arranged between adjacent electric cores in the thermal runaway sealing assembly, the foam cotton provides 0-80% of compression resilience amount for the expansion of the electric cores, provides breathing space for the electric cores, is convenient for the electric cores to have sufficient breathing space, and has lower heat conductivity coefficient to delay heat transfer; foam is arranged between the adjacent thermal runaway sealing assemblies, so that the functions are realized, and heat can be delayed or prevented from being transmitted into the thermal runaway sealing assemblies from the side walls of the thermal runaway sealing assemblies during thermal runaway;
5. the front end plate and the rear end plate are of a multilayer structure, so that hot air and hot substances can be effectively delayed from directly impacting the front end plate and the rear end plate from the inside when thermal runaway occurs, and heat outside the module can be delayed from being transmitted into a thermal runaway sealing assembly which is not subjected to thermal runaway;
6. in this application, the directional management and control that erupts when it corresponds seal structure unit thermal runaway can be realized to the shutoff steel sheet structure on battery module front end plate and the back end plate, and unit inside steam or thermal mass can excrete through it rapidly, and other shutoff steel sheets that do not erupt the unit and correspond can effectively block outside thermal mass and get into.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an exploded view of a battery module for delaying thermal runaway according to the present invention;
FIG. 2 is a detail view of section A of FIG. 1 of the present invention;
FIG. 3 is a schematic structural view of a thermal runaway seal assembly of the invention;
FIG. 4 is an exploded schematic view of a thermal runaway seal assembly of the invention;
FIG. 5 is a schematic structural view showing an exploded state of a front end plate of the lower case of the present invention;
FIG. 6 is a schematic diagram of a battery module for delaying thermal runaway in a thermal runaway state according to the present invention;
FIG. 7 is a schematic view of the construction of the card of the present invention;
fig. 8 is a schematic view of the card of the present invention mated with a cover.
Reference numerals:
1. a thermal runaway seal assembly; 11. an electric core; 13. a housing; 14. heat insulation glue; 15. electrically connecting the insulating member; 16. a tab insulator; 17. an aerogel strip; 18. a card; 181. a long positioning claw; 182. a short positioning pawl; 21. an upper cover; 22. a lower box body; 23. a front end plate; 24. a rear end plate; 25. plugging the steel sheet; 26. an exhaust hole; 27. a gel layer is coated; 30. and (5) soaking cotton.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 by those of ordinary skill in the art through specific situations.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 to 8, the battery module for delaying thermal runaway includes a box and a plurality of thermal runaway sealing assemblies 1, the plurality of thermal runaway sealing assemblies 1 have the same structure and are arranged in the box side by side, and adjacent thermal runaway sealing assemblies 1 are electrically connected to form a module; the box body comprises a front end plate 23 and a rear end plate 24; the thermal runaway sealing assembly 1 comprises a housing 13 and at least two electric cores 11, foam 30 for buffering and heat insulation is arranged between the adjacent electric cores 11, the housing 13 covers the outer sides of the electric cores 11, the upper end of the housing 13 is arranged in a sealing manner, and openings at two sides of the housing 13 are arranged and correspond to a front end plate 23 and a rear end plate 24 of a box body; every thermal runaway seal assembly 1 and front end plate 23, back end plate 24 forms the unit of independent seal, this structure can not only effectively slow down thermal diffusion between the sealed single subassembly of out of control, can also guarantee when electric core 11 thermal runaway in the sealed single subassembly of out of control, the thermal mass of injection can only be followed both sides utmost point ear department blowout, the both sides opening part position blowout of housing 13 promptly, thereby the eruption that thermal runaway seal assembly 1 orientation and ordered delay in the battery module when having realized thermal runaway, only smoke in making the module 10 minutes as far as possible and not take place the explosion of starting a fire, provide time as much as possible for fleing, promote the time under the unexpected factor of safety.
Preferably, the box still includes upper cover 21 and lower casing, the casing is tetragonal groove structure down, upper cover 21 and casing constitution box structure down, fix thermal runaway seal subassembly 1, also regard as thermal runaway seal subassembly 1's supporting body, form the battery module, preceding end plate 23 and back end plate 24 parallel arrangement are as the both sides of casing down, the outside on both sides is equipped with cellular strengthening rib in addition, increase the intensity of casing down, the weight of casing under the increase as few as possible simultaneously, guarantee battery module high strength, the light-weighted characteristics, thermal runaway seal subassembly 1 perpendicular to preceding end plate 23 and back end plate 24 set up, can prevent the compactness, occupation space is few, and make things convenient for the setting of exhaust hole 26.
Preferably, the upper cover 21 is formed by bending steel, the thickness of the upper cover 21 is 0.5mm-1mm, the lower shell is of an integrated structure formed by welding aluminum profiles in a splicing mode, the upper cover 21 and the lower shell are fixed into a whole through riveting or welding, the steel of the upper cover 21 can effectively resist the impact of high-temperature gas at thousands of degrees on the outside without cracking, the lower shell is made of aluminum profiles, the weight of the module can be effectively reduced while the strength is guaranteed, and the module is easy to assemble, splice and perform laser welding.
Preferably, an upper aerogel layer is arranged between the upper end face of the housing 13 and the box body, the upper aerogel layer is adhered to the top of each housing 13 and is uniformly thick, the area of the upper aerogel layer is the same as that of the top of the housing 13, and the upper aerogel layer is a back adhesive sheet with the thickness of 1-2 mm.
Preferably, a plurality of exhaust holes 26 are formed in each of the front end plate 23 and the rear end plate 24, the exhaust holes 26 in the front end plate 23 and the exhaust holes 26 in the rear end plate 24 respectively correspond to two longitudinal ends of the housing 13 in the thermal runaway sealing assembly 1, and each exhaust hole 26 is correspondingly provided with a plugging steel sheet 25; preferably, the plugging steel sheet 25 is fixed at the vent hole 26 by gluing or hooking, under the action of internal pressure generated by the thermal runaway seal assembly 1, the plugging steel sheet 25 can only be opened from inside to outside, when the thermal runaway seal assembly 1 is in thermal runaway, the corresponding plugging steel sheets 25 on the front end plate 23 and the rear end plate 24 of the thermal runaway seal assembly 1 are flushed from inside to outside under the action of internal pressure, and in combination with the wrapping and limiting effect of the U-shaped cover shell 13 on the top and the side wall of the electric core 11 in the thermal runaway seal assembly 1, high-temperature and high-pressure gas and substances in the thermal runaway seal assembly 1 can only be directionally released to the outside of the battery module from the vent hole 26 of the front end plate 23 and the rear end plate 24, the thermal runaway seal assembly 1 without thermal runaway, the steel sheets on the corresponding front end plate 23 and rear end plate 24 can delay or block the high-temperature gas and substances from the outside from entering, thereby retarding or blocking rapid thermal runaway transfer or diffusion between the thermal runaway seal assemblies 1.
This kind of 11 module structural style of soft-packaged electrical core passes through the guide effect of U type housing 13, can only erupt from 1 both sides utmost point ear department of thermal runaway seal subassembly when 11 thermal runaway of electric core in the thermal runaway seal subassembly 1, combine the sealed thermal-insulated and front end plate 23 of thermal runaway seal subassembly 1, the directional guard action of outwards opening of shutoff steel sheet 25 on the rear end plate 24, thereby hot gas and thermal mass's directional eruption management and control when having realized thermal runaway, effectively slow down or blocked thermal diffusion between the thermal runaway seal subassembly 1, the eruption that makes the thermal runaway seal subassembly 1 directional just ordered delay in the big module.
Preferably, the front end plate 23 and the rear end plate 24 are both multilayer sheet structures, the multilayer structures of the front end plate 23 and the rear end plate 24 are the same, the inner side of the front end plate 23 is sequentially provided with a dustproof film, a mica sheet and a side aerogel layer from outside to inside, the mica sheet and the side aerogel layer are provided with a position avoiding hole corresponding to the vent hole, the multilayer sheet structures can effectively delay hot air and hot substances from directly impacting the front end plate 23 and the rear end plate 24 from inside when thermal runaway occurs, and meanwhile, the heat outside the module can be delayed to be transmitted into the thermal runaway sealing assembly 1 which is not subjected to thermal runaway.
Preferably, the dustproof film is a sheet film with the thickness of 0.1-0.2mm, the back glue of the dustproof film is adhered to the inner side of the front end plate 23 to prevent external dust and foreign matters from entering the thermal runaway sealing assembly 1, and meanwhile, when the thermal runaway sealing assembly 1 is at high temperature, the dustproof film is melted to ensure that thermal substances in the thermal runaway sealing assembly 1 are discharged through the dustproof film.
Preferably, the mica sheet is formed by pressing a phlogopite material with the thickness of 1-2mm into a sheet, the mica sheet is back glued on two sides, one side of the mica sheet is bonded on the inner side of the dustproof film for fixing, and the other side of the mica sheet is bonded with the side aerogel layer for resisting the direct high-temperature impact of hot substances on the front end plate 23 and/or the rear end plate 24 when the thermal runaway is resisted, so that the damage of the front end plate 23 and/or the rear end plate 24 is delayed, and the continuous high temperature of.
Preferably, the side aerogel layer is of a 1-2mm sheet structure, when the side aerogel layer is combined with the mica sheet to resist thermal runaway, thermal substances in the battery module impact the front end plate 24 and the rear end plate 24, and the side aerogel layer is tightly combined with two ends of the housing 13 in an interference fit manner to eliminate assembly gaps, guarantee the sealing performance of two sides of the thermal runaway sealing assembly 1 and resist thermal substance communication between the thermal runaway sealing assembly 1.
Preferably, the foam 30 is a UL 94-V0-grade flame-retardant heat-insulating silica gel foam 30, the foam 30 provides 0-80% of compression resilience for the expansion of the battery cell 11, provides a breathing space for the battery cell 11, facilitates the battery cell 11 to have a sufficient breathing space, and has a low heat conductivity coefficient to delay heat transfer; more preferably, the adjacent thermal runaway seal assemblies 1 are also provided with foam 30, which is made of the same material as described above, to delay or prevent heat from being transferred from the side wall of the thermal runaway seal assembly 1 to the interior of the thermal runaway seal assembly 1 during thermal runaway.
Preferably, the edge sealing position of the top of the battery cell 11 is provided with a heat insulation glue for sealing, the heat insulation glue is modified organic silica gel, the heat conductivity coefficient of the glue is low, external heat can be effectively insulated and blocked, the heat can be rapidly transferred to the battery cell 11, and the glue has stable high and low temperature performance and can work at-40 ℃ plus 120 ℃ for a long time.
Preferably, the housing 13 is U-shaped with a downward opening, and two ends are provided with openings, the housing 13 positions and protects the side surface of the soft-package battery cell 11, the length of the housing 13 is greater than that of the soft-package battery cell 11, the soft-package battery cell 11 is centrally arranged in the housing 13, two adjacent housings 13 are clamped and sealed at the opening of the longitudinal position by the card 18, the card 18 is of a sheet metal structure, the card 18 is of a structure like a Chinese character ji, two long positioning claws are arranged on one side of the card 18, two short positioning claws 182 are arranged on two sides of each long positioning claw 181, the two long positioning claws 181 are respectively arranged on the outer sides of the tops of the two adjacent housings, the short positioning claws 182 are arranged on the inner side of the top of the housing, the long side of the card 18 is aligned, the thermal runaway sealing assemblies 1 can be fixed to form a whole, so that the connection stability of the thermal runaway sealing assemblies 1 is enhanced; when electric core 11 thermal runaway in the unit, U type cover shell 13 can erupt 11 thermal runaway of electric core and play the guide effect, and electric core 11 only can erupt from 13 both sides openings part of U type cover shell to effectively prevent thermal runaway seal assembly 1 from erupting from the top.
Preferably, the vertical both ends of thermal runaway seal assembly 1, one side is equipped with 11 utmost point ear insulators 16 of electric core, the opposite side is equipped with electricity and connects insulator 15, when making things convenient for multiunit thermal runaway seal assembly 1 to carry out the electricity connection, guarantee insulating nature, the outside of electricity connection insulator 15 is equipped with sealed aerogel 17 of using, the sealing of side has been realized, avoid outside impurity or heat to get into, also delay under the thermal runaway state, thermal outwards gives off, promote the sealing performance of 1 subassembly of thermal runaway seal assembly.
Preferably, the thermal runaway seal assembly 1 is tightly combined with the front end plate 23 and the rear end plate 24, the bottom of the thermal runaway seal assembly 1 is firmly bonded with the bottom of the box body by using heat-conducting structural adhesive to form a relatively independent seal structure, thermal substances of the thermal runaway seal assembly 1 are directionally and quickly discharged out of the module after the thermal runaway of one thermal runaway seal assembly 1, and heat cannot be immediately transferred to adjacent or other thermal runaway seal assemblies 1, so that the thermal runaway extension is effectively delayed.
Preferably, be equipped with thermal-insulated glue 14 between housing 13 top and the electric core 11, thermal-insulated glue 14 coats the inside at housing 13, paste housing 13 and electric core 11 structure as an organic whole, this thermal-insulated glue 14 plays the fixed action of electric core 11 with U type housing 13 when insulating against heat, aerogel layer bonds in the outside of U type housing 13 top, go up the aerogel layer and be 1-2mm thick gum sheet, wholly bond in U type housing 13 top in each thermal runaway seal assembly 1, if select for use too thick last aerogel layer can influence module weight and effect promotion not much, go up aerogel layer upper portion and compress tightly with upper cover 21 again, go up aerogel layer and combine upper cover 21 and U type housing 13 top inboard thermal-insulated glue 14 to play the thermal-insulated action in top of each thermal runaway seal assembly 1.
A vehicle uses foretell battery module, and thermal runaway is steerable and can postpone, and the security is high.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (19)
1. Postpone battery module of thermal runaway, its characterized in that: the thermal runaway sealing device comprises a box body and a plurality of thermal runaway sealing assemblies, wherein the thermal runaway sealing assemblies are identical in structure and are arranged in the box body side by side, and adjacent thermal runaway sealing assemblies are electrically connected to form a module;
the box body comprises a front end plate and a rear end plate;
the thermal runaway sealing assembly comprises a housing and at least two electric cores, foam for buffering and heat insulation is arranged between every two adjacent electric cores, the housing is coated on the outer sides of the electric cores, the upper end of the housing is sealed, and openings on two sides of the housing are arranged and correspond to a front end plate and a rear end plate of the box body;
each thermal runaway seal assembly forms an independently sealed unit with the front end plate and the rear end plate.
2. The battery module for delaying thermal runaway of claim 1, wherein: the box body further comprises an upper cover and a lower shell, the lower shell is of a quadrilateral groove-shaped structure, the front end plate and the rear end plate are arranged in parallel and serve as two sides of the lower shell, and the thermal runaway sealing assembly is perpendicular to the front end plate and the rear end plate.
3. The battery module for delaying thermal runaway of claim 2, wherein: the upper cover is formed by bending steel, the thickness of the upper cover is 0.5-1 mm, the lower shell is of an integrated structure formed by welding aluminum profiles, and the upper cover and the lower shell are fixed into a whole through riveting or welding.
4. The battery module for delaying thermal runaway according to any one of claims 1 to 3, wherein: an upper aerogel layer is arranged between the upper end face of the housing and the box body, the upper aerogel layer is integrally adhered to the top of each housing and is arranged in a uniform thickness mode, and the upper aerogel layer is a back glue sheet with the thickness of 1-2 mm.
5. The battery module for delaying thermal runaway according to any one of claims 1 to 3, wherein: the front end plate and the rear end plate are respectively provided with a plurality of exhaust holes, the exhaust holes in the front end plate and the exhaust holes in the rear end plate respectively correspond to the two longitudinal ends of the shell in the thermal runaway sealing assembly, and each exhaust hole is correspondingly provided with a plugging steel sheet.
6. The battery module for delaying thermal runaway of claim 5, wherein: the plugging steel sheet is fixed at the exhaust hole through an adhesive or a clamping hook structure, and can only be opened from inside to outside under the action of internal pressure generated by the thermal runaway sealing assembly.
7. The battery module for delaying thermal runaway of claim 5, wherein: the front end plate and the rear end plate are of multilayer sheet structures, the multilayer structures of the front end plate and the rear end plate are the same, the inner side of the front end plate is sequentially provided with a dustproof film, a mica sheet and a side aerogel layer from outside to inside, and the mica sheet and the side aerogel layer are provided with a position avoiding hole corresponding to the air vent.
8. The battery module for delaying thermal runaway of claim 7, wherein: the dustproof film is a sheet film with the thickness of 0.1-0.2mm, the back adhesive of the dustproof film surface is adhered to the inner side of the front end plate to prevent external dust and foreign matters from entering the thermal runaway sealing assembly, and meanwhile, when the thermal runaway sealing assembly is at high temperature, the dustproof film melts to ensure that thermal matters in the thermal runaway sealing assembly are discharged through the dustproof film.
9. The battery module for delaying thermal runaway of claim 7, wherein: the mica sheet is pressed by a phlogopite material with the thickness of 1-2mm to form a sheet, the double sides of the mica sheet are back glued, one side of the mica sheet is bonded on the inner side of the dustproof film to be fixed, and the other side of the mica sheet is bonded with the side aerogel layer to resist the direct high-temperature impact of hot substances on the front end plate and/or the rear end plate when the thermal runaway is resisted, so that the damage of the front end plate and/or the rear end.
10. The battery module for delaying thermal runaway of claim 7, wherein: the side aerogel layer is of a 1-2mm sheet structure, when the side aerogel layer is combined with the mica sheet to resist thermal runaway, thermal substances in the battery module impact the front end plate and the rear end plate, the side aerogel layer is tightly combined with the two ends of the housing in an interference fit manner to eliminate assembly gaps, so that the sealing performance of the two sides of the thermal runaway sealing assembly is guaranteed, and thermal substance communication between the thermal runaway sealing assemblies is prevented.
11. The battery module for delaying thermal runaway of claim 1, wherein: the foam is UL 94-V0-level flame-retardant heat-insulation silica gel foam, and the foam provides 0-80% compression resilience amount of the self thickness for the expansion of the battery cell and provides a breathing space for the battery cell.
12. The battery module for delaying thermal runaway of claim 11, wherein: and the adjacent thermal runaway sealing assemblies are also provided with foam to delay or prevent heat from being transmitted into the thermal runaway sealing assemblies from the top and the side wall of the thermal runaway sealing assemblies during thermal runaway.
13. The battery module for delaying thermal runaway of claim 1, wherein: the edge sealing position of the top of the battery core is provided with heat insulation glue for sealing, and the heat insulation glue is modified organic silica gel.
14. The battery module for delaying thermal runaway of claim 1, wherein: the enclosers are U-shaped with downward openings, openings are formed in two ends of the enclosers, and the upper ends of the openings of the two adjacent enclosers in the longitudinal direction are clamped, plugged and connected through the clamping pieces.
15. The battery module for delaying thermal runaway of claim 14, wherein: the card is sheet metal construction, the card is a structure of nearly font, one side of card is equipped with two long locating claws, every the both sides of long locating claw all are equipped with two short locating claws, and two long locating claws set up respectively in the top outside of two adjacent housings, short locating claw establishes the inboard at housing top.
16. The battery module for delaying thermal runaway of claim 1, wherein: the thermal runaway seal assembly is characterized in that the two longitudinal ends of the thermal runaway seal assembly are provided with an electric core tab insulating part on one side and an electric connection insulating part on the other side, and a sealing aerogel strip is arranged on the outer side of the electric connection insulating part.
17. The battery module for delaying thermal runaway of claim 1, wherein: the thermal runaway sealing assembly is tightly combined with the front end plate and the rear end plate, and the bottom of the thermal runaway sealing assembly is firmly bonded with the bottom of the box body by using heat-conducting structural adhesive to form a relatively independent sealing structure.
18. The battery module for delaying thermal runaway of claim 1, wherein: and a heat insulation glue is arranged between the top of the housing and the battery core, and the heat insulation glue is coated in the top of the housing and is adhered to the housing and the battery core into an integral structure.
19. A vehicle, characterized in that: a battery module for delaying thermal runaway as claimed in any one of claims 1 to 18 is used.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467698.XA CN112467285A (en) | 2020-12-14 | 2020-12-14 | Battery module for delaying thermal runaway and vehicle using same |
| PCT/CN2021/074568 WO2022126841A1 (en) | 2020-12-14 | 2021-01-31 | Battery module capable of delaying thermal runaway and vehicle using same |
| EP21887862.7A EP4044346A1 (en) | 2020-12-14 | 2021-01-31 | Battery module capable of delaying thermal runaway and vehicle using same |
| DE202021100964.0U DE202021100964U1 (en) | 2020-12-14 | 2021-02-26 | Battery module to delay thermal runaway and vehicle with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467698.XA CN112467285A (en) | 2020-12-14 | 2020-12-14 | Battery module for delaying thermal runaway and vehicle using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112467285A true CN112467285A (en) | 2021-03-09 |
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ID=74803995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011467698.XA Pending CN112467285A (en) | 2020-12-14 | 2020-12-14 | Battery module for delaying thermal runaway and vehicle using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112467285A (en) |
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| CN114784429A (en) * | 2022-03-18 | 2022-07-22 | 多氟多新能源科技有限公司 | Battery module and battery pack |
| CN115483483A (en) * | 2021-06-15 | 2022-12-16 | 恒大新能源技术(深圳)有限公司 | Module unit, battery module and battery pack |
| WO2023014125A1 (en) * | 2021-08-04 | 2023-02-09 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle including same |
| WO2023070399A1 (en) * | 2021-10-27 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and method for manufacturing battery |
| WO2023239216A1 (en) * | 2022-06-10 | 2023-12-14 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle comprising same |
| WO2024019419A1 (en) * | 2022-07-20 | 2024-01-25 | 주식회사 엘지에너지솔루션 | Battery pack, battery module, and vehicle including same |
| WO2024019414A1 (en) * | 2022-07-20 | 2024-01-25 | 주식회사 엘지에너지솔루션 | Battery pack and device including same |
| WO2024034899A1 (en) * | 2022-08-10 | 2024-02-15 | 주식회사 엘지에너지솔루션 | Battery module, method for manufacturing same, and battery pack |
| WO2024049212A1 (en) * | 2022-08-31 | 2024-03-07 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle comprising same |
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| CN115483483A (en) * | 2021-06-15 | 2022-12-16 | 恒大新能源技术(深圳)有限公司 | Module unit, battery module and battery pack |
| WO2023014125A1 (en) * | 2021-08-04 | 2023-02-09 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle including same |
| WO2023070399A1 (en) * | 2021-10-27 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and method for manufacturing battery |
| CN114784429A (en) * | 2022-03-18 | 2022-07-22 | 多氟多新能源科技有限公司 | Battery module and battery pack |
| WO2023239216A1 (en) * | 2022-06-10 | 2023-12-14 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle comprising same |
| WO2024019419A1 (en) * | 2022-07-20 | 2024-01-25 | 주식회사 엘지에너지솔루션 | Battery pack, battery module, and vehicle including same |
| WO2024019414A1 (en) * | 2022-07-20 | 2024-01-25 | 주식회사 엘지에너지솔루션 | Battery pack and device including same |
| WO2024034899A1 (en) * | 2022-08-10 | 2024-02-15 | 주식회사 엘지에너지솔루션 | Battery module, method for manufacturing same, and battery pack |
| WO2024049212A1 (en) * | 2022-08-31 | 2024-03-07 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle comprising same |
| WO2024072046A1 (en) * | 2022-09-29 | 2024-04-04 | 주식회사 엘지에너지솔루션 | Battery cell and battery module comprising same |
| WO2024071613A1 (en) * | 2022-09-30 | 2024-04-04 | 주식회사 엘지에너지솔루션 | Battery pack and vehicle including same |
| EP4350844A1 (en) * | 2022-10-05 | 2024-04-10 | Automotive Cells Company SE | An assembly comprising a plurality of electrochemical cells and an electrical device comprising such assembly |
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