CN113471591A - Power battery assembly for vehicle and vehicle with power battery assembly - Google Patents
Power battery assembly for vehicle and vehicle with power battery assembly Download PDFInfo
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- CN113471591A CN113471591A CN202110845331.5A CN202110845331A CN113471591A CN 113471591 A CN113471591 A CN 113471591A CN 202110845331 A CN202110845331 A CN 202110845331A CN 113471591 A CN113471591 A CN 113471591A
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- cooling
- battery module
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- assembly
- power battery
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- 238000001816 cooling Methods 0.000 claims abstract description 175
- 239000002826 coolant Substances 0.000 claims abstract description 61
- 239000000110 cooling liquid Substances 0.000 claims description 39
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 abstract description 54
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 239000012943 hotmelt Substances 0.000 description 11
- 239000012809 cooling fluid Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
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- 238000000429 assembly Methods 0.000 description 1
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- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
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Images
Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- 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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
-
- 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
Abstract
The application discloses a vehicle that is used for power battery assembly of vehicle and has it, power battery assembly includes: the battery module, first cooling assembly and second cooling assembly set up respectively and cool off at the upper and lower side of battery module, wherein are provided with the coolant liquid passageway in the second cooling assembly, still are provided with the fuse-link on the second cooling assembly, and the fuse-link is suitable for when the battery module is on fire the heat fusing in order to lead the burning things which may cause a fire with the coolant liquid in the coolant liquid passageway. Fuse-link is heated and fuses when battery module takes place the thermal runaway, with the coolant liquid direction battery module that flows in the coolant liquid passageway, can put out the naked light that the battery module produced, still can reduce the battery module and produce the condition emergence of naked light once more, and it is perfect to handle the thermal runaway condition of battery module, improves the security of power battery assembly. The fuse-link makes the reaction rate very fast to the thermal runaway condition through temperature variation to do not need initiative operation, promote user's security.
Description
Technical Field
The application relates to the field of new energy, in particular to a power battery assembly for a vehicle and the vehicle with the power battery assembly.
Background
The existing new energy automobile often uses power battery for energy supply, when the power battery is out of control, high temperature can be generated, fire can be caused to cause danger in serious cases, the existing power battery design can prevent flame spread through installing mica sheets or other materials, but the electric core of the power battery is numerous, the position where the out of control is generated can not be predicted, only some local fireproof materials are added, and the thermal diffusion can not be well controlled, and the fireproof materials can not perform fire extinguishing treatment on the electric core which is out of control, and only can prevent the fire from spreading, the handling of the out of control of the power battery is passive, and the danger of the fire spreading is still high only.
Content of application
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of this application is to provide a power battery assembly for vehicle, power battery assembly can initiatively put out the naked light that thermal runaway produced, and it is fast, the security is high to make the reaction to battery module thermal runaway condition.
Another object of the present application is to propose a vehicle.
The power battery assembly for the vehicle according to the embodiment of the application comprises: a battery module; a first cooling assembly disposed at a lower side of the battery module to cool the lower side of the battery module; a second cooling assembly disposed at an upper side of the battery module to cool the upper side of the battery module; the second cooling assembly is internally provided with a cooling liquid passage, and the second cooling assembly is also provided with a fuse piece which is suitable for being heated and fused when the battery module is on fire so as to guide the cooling liquid in the cooling liquid passage to a fire source.
According to power battery assembly of this application embodiment, through being provided with the fuse-link, can be heated fusing when battery module takes place the thermal runaway, thereby switch on coolant liquid route and battery module, the battery module with the coolant liquid direction thermal runaway of flow in the coolant liquid route, initiative processing battery module thermal runaway, put out the naked light that the battery module produced, the coolant liquid that flows out still can be to battery module rapid cooling, block air and battery module contact simultaneously, it produces the condition emergence of naked light once more to reduce the battery module of thermal runaway, it is more perfect to handle the thermal runaway condition of battery module, the security that improves power battery assembly. The fuse-link makes the reaction rate very fast to battery module thermal runaway condition through temperature variation to do not need artifical initiative operation, promote user's security.
In some embodiments, the battery module includes: a plurality of sub-modules, the second cooling assembly comprising: and the second cooling pieces are arranged on the upper sides of the corresponding sub-modules, and the second cooling pieces are provided with the fusing pieces.
Specifically, the second cooling assembly is configured as a cooling pipe, and the second cooling member is configured as a sub-cooling pipe on which the fuse member is disposed.
Further, the sub-cooling pipe includes: the pipeline comprises a plurality of spaced pipeline bodies, and the fuse link is arranged between every two adjacent pipeline bodies.
In some embodiments, the tube body and the fuse have passages therein that communicate with each other, the tube body and the fuse together defining sub-cooling passages, a plurality of the sub-cooling passages communicating with each other to define the cooling liquid passage.
Optionally, the fuse is in plug-in fit with the adjacent pipeline body, and a sealing ring is arranged between the fuse and the adjacent pipeline body.
Optionally, one end of the pipeline body adjacent to the fuse is provided with a plurality of injection holes, and the plurality of injection holes are respectively communicated with the passage in the pipeline body and the passage in the fuse.
In some embodiments, the cooling tubes are configured as flat tubes, the cross-section of which has a dimension in the horizontal direction which is greater than a dimension in the vertical direction.
Optionally, the cooling fluid in the first cooling assembly and the cooling fluid in the second cooling assembly are the same.
A vehicle according to the embodiment of the application comprises the power battery assembly.
According to the vehicle of this application embodiment, through setting up above-mentioned power battery assembly, when power battery assembly takes place the thermal runaway, cooling module can make the reaction fast, initiatively put out the naked light, to the battery module cooling that takes place the thermal runaway, and can reduce the probability that power battery assembly secondary is after combustion, the security has been improved, the condition that the vehicle catches fire or even explodes because of power battery assembly trouble has been reduced, cooling module does not need artifical initiative operation can initiatively handle the dangerous situation, and the reaction is rapid, provide safe time for user of service and around the crowd, also provide the guarantee for follow-up rescue processing work.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective external view of a second cooling element of a power cell assembly according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a sub-module and a second cooling element of a power battery assembly according to an embodiment of the present disclosure;
fig. 3 is a perspective external view of a fuse of a power battery assembly according to an embodiment of the present application.
Reference numerals:
a second cooling member 1, a sub-cooling pipe 10, a pipeline body 11,
A fuse 2, a seal ring 21,
A sub-module 200, a battery cell 201,
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "top," "bottom," "inner," "outer," "horizontal," "vertical," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. In the description of the present application, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact not directly but via another feature therebetween.
In the description of the present application, it is to 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 application can be understood in a specific case by those of ordinary skill in the art.
A power battery assembly for a vehicle according to an embodiment of the present application is described below with reference to fig. 1 to 3.
The power battery assembly according to this application embodiment includes: the battery module, first cooling module and second cooling module, first cooling module sets up and cools off in order to the downside of battery module at the downside of battery module, second cooling module sets up and cools off in order to the upside of battery module at the upside of battery module, wherein be provided with the coolant liquid passageway in the second cooling module, still be provided with fuse 2 on the second cooling module, fuse 2 is suitable for the fusing of being heated when the battery module is fired in order to lead the burning things which may cause a fire with the coolant liquid in the coolant liquid passageway.
The power battery assembly of this application embodiment in battery module give the vehicle energy supply, can produce the heat in the course of the work, break down when battery module, the thermal runaway phenomenon battery module will produce high temperature, probably causes the phenomenon of catching fire and even produces the explosion, causes huge harm. Through downside and upside at battery module be provided with first cooling module and second cooling module respectively, can carry out the heat exchange with battery module, the operating temperature who maintains battery module is in safety range, improve the security of power battery assembly, and it can improve heat exchange efficiency to establish cooling module at battery module's downside and upside, promote the cooling effect to battery module, the upside and the downside of battery module cool down simultaneously, make battery module's temperature even, compare in only cooling in one side of battery module, the battery module of both sides cooling down simultaneously receives cold evenly, the more balanced difference in temperature of surface temperature is less, can improve battery module's security and life.
Be located and be provided with the coolant liquid passageway in the second cooling module of battery module upside, that is to say, the coolant liquid flows in the coolant liquid passageway in the second cooling module, and the lower coolant liquid of temperature carries out the heat exchange with the battery module at the in-process that flows, can cool down the battery module. In some embodiments, the first cooling assembly has the same structure as the second cooling assembly, and a cooling fluid passage is also provided in the first cooling assembly, and the cooling fluid flows through the cooling fluid passage in the first cooling assembly to exchange heat with the battery module.
The second cooling component is provided with a fuse part 2, when the battery module normally works, the temperature of the power battery assembly does not reach the melting point of the hot melt part, the hot melt part is in a normal temperature state, the normal flow of the cooling liquid in the cooling liquid passage is maintained, the cooling work of the second cooling component is assisted, when the battery module is out of control, the battery module generates high temperature, even fires, the temperature in the power battery assembly is sharply increased, the temperature reaches the melting point of the hot melt part, the hot melt part is heated and fused, the cooling liquid passage is communicated with the space where the fired battery module is located, so that the cooling liquid flowing in the cooling liquid passage is guided to the battery module out of control, the cooling liquid can extinguish naked fire, prevent fire from spreading and reduce the generation of fire, and the cooling liquid can be directly contacted with the battery module, so that the heat exchange efficiency is improved, the battery module is cooled, and the cooling liquid can block air from contacting with the battery module, the battery module is prevented from generating open fire again.
According to the power battery assembly of this application embodiment, through be provided with fuse-link 2 on second cooling assembly, can be heated fusing when battery module takes place the thermal runaway, thereby switch on coolant liquid route and battery module, the battery module of thermal runaway is led to the coolant liquid that flows in the coolant liquid route, to power battery module thermal runaway initiative processing, put out the battery module that produces the naked light, the outflow coolant liquid still can be to battery module rapid cooling, block air and battery module contact simultaneously, it produces the condition emergence of naked light once more to reduce the battery module of thermal runaway, it is more perfect to handle the thermal runaway condition of battery module, the security that improves power battery assembly. Fuse 2 is through the timely reaction of temperature variation, and it is very fast to make reaction rate to the battery module thermal runaway condition to do not need artifical initiative operation, promote user's security.
In some embodiments, a battery module includes: a plurality of sub-modules 200, the second cooling assembly comprising: and a plurality of second cooling pieces 1, wherein each second cooling piece 1 is arranged on the upper side of the corresponding sub-module 200, and each second cooling piece 1 is provided with a fuse 2.
The battery module includes a plurality of electric cores 201, and a plurality of electric cores 201 are often distributed and arrange owing to the structural division of power battery assembly box or in order to satisfy the demand of arranging, form a plurality of sub-modules 200 promptly, and a plurality of sub-modules 200 are cooled down respectively by a plurality of second cooling member 1 one-to-ones. In some embodiments, even if the electric cores 201 are all arranged in a gathering manner, the battery module can be artificially divided into different sub-modules 200 due to the large size of the battery module, and then the plurality of second cooling pieces 1 are arranged corresponding to the plurality of sub-modules 200, so that the heat exchange efficiency can be improved, and the cooling efficiency can be improved. When a certain submodule group 200 takes place the thermal runaway, but correspond the second cooling part 1 that submodule group 200 set up and react fast, the fuse-link 2 fusing that sets up on the second cooling part 1, put out naked light or the operation of cooling submodule group 200, compare in wholly setting up same second cooling part 1 with the battery module, divide into a plurality of submodule groups 200 with the battery module, again through a plurality of second cooling parts 1 respectively be responsible for the cooling with submodule group 200 alone and handle the thermal runaway condition of a fire, can improve work efficiency, improve power battery assembly security.
In some embodiments of the present application, the sub-modules 200 have different volumes, and the size of the second cooling element 1 can be adjusted to fit the sub-modules 200 with different volumes, so that the surface temperatures of the different sub-modules 200 are similar.
Specifically, as shown in fig. 1 and 2, the second cooling assembly is configured as a cooling pipe, the second cooling member 1 is configured as sub-cooling pipes 10, and each sub-cooling pipe 10 is provided with a fuse 2.
A cooling liquid channel is arranged in the second cooling assembly, when the second cooling assembly is constructed as a cooling pipe, a pipeline in the cooling pipe is the cooling liquid channel, the second cooling part 1 is a sub-cooling pipe 10, and a fuse part 2 is arranged on each sub-cooling pipe 10.
In some embodiments, the cooling tube may alternatively be provided as a nylon tube.
In further exemplary embodiments, the second cooling assembly may be configured as a cooling plate in which passages are present for the passage of a cooling liquid, and the second cooling element 1 is configured as a sub-cooling plate, at each passage of which a fuse element 2 is arranged. Likewise, the second cooling module may be configured in other forms, all within the scope of the present application.
Further, as shown in fig. 1, the sub-cooling pipe 10 includes: a plurality of spaced apart pipeline bodies 11, each is provided with fuse 2 between two adjacent pipeline bodies 11.
Be provided with fuse 2 between two adjacent pipeline bodies 11, a plurality of pipeline bodies 11 have constituteed sub-cooling tube 10 with a plurality of fuse 2 jointly. In some embodiments, as shown in fig. 2, the sub-cooling tube 10 is of a bent structure, and it can be understood that, when the battery cell 201 is charged and discharged, the temperature of the positive and negative connecting sheets is the highest, so that the sub-cooling tube 10 is disposed at the positive and negative connecting sheets, the sub-pipeline is disposed along the arrangement positions of the positive and negative connecting sheets of the battery cell 201, and the sub-cooling tube 10 and the positive and negative connecting sheets are disposed correspondingly, so that the temperature of the battery module can be effectively lowered, and the heat exchange efficiency can be improved. And the bent arrangement of the sub-cooling pipes 10 can increase the arrangement selection mode of the battery module, the universality is higher, and the space of the power battery assembly can be saved.
In some embodiments of the present application, the lengths of the pipeline bodies 11 are similar, that is, the fuses 2 are distributed uniformly in the sub-cooling pipes 10, the fuses 2 are uniformly distributed above the sub-modules 200, when a certain region of the sub-modules 200 is thermally out of control, the fuses 2 closest to the thermally out of control region can be processed in time, the battery modules in the sub-regions are divided into smaller sub-pipe regions again, so that the work efficiency can be improved, and the safety of the power battery assembly is improved.
In some embodiments of the present application, the sub-cooling pipe 10 and the sub-module 200 may be adhered by a joint adhesive, so that the second cooling member 1 is stably contacted with the battery module, thereby improving heat exchange efficiency.
In some embodiments, the pipe body 11 and the fuse 2 have passages therein that communicate with each other, the pipe body 11 and the fuse 2 collectively defining sub-cooling passages, and a plurality of the sub-cooling passages communicate with each other to define a cooling liquid passage.
It can be understood that the coolant flows in the coolant passage, that is, flows among the plurality of sub-cooling passages, the inside of the pipe body 11 is provided with a pipe for the coolant to flow, the fuse 2 is also provided with a passage, so that the coolant can flow through the fuse 2 from the passage to enter the pipe body, a single pipe body 11 is communicated with a fuse 2, the pipe and the passage of the single pipe body are communicated to form a sub-cooling passage, the adjacent pipe bodies 11 are connected by the fuse 2, the plurality of pipe bodies 11 and the plurality of fuse 2 jointly form the sub-cooling pipe 10, and then the plurality of sub-cooling passages are communicated to jointly form the coolant passage.
When the fuse 2 is melted, the pipe body 11 is separated from the fuse 2, and the cooling member flowing through the pipe body 11 cannot flow into another pipe body 11 through the passage of the fuse 2, but flows out from the melted gap of the fuse 2, and flows out from the pipe body 11 to the sub-module 200, so as to extinguish the open fire or cool the sub-module 200.
Optionally, as shown in fig. 3, the fuse 2 is inserted into and fitted with the adjacent pipeline body 11, and a sealing ring 21 is disposed between the fuse 2 and the adjacent pipeline body 11.
In some embodiments, the fuse 2 is designed to be inserted into the pipeline body 11 at two ends, and the sealing rings 21 are disposed at the insertion positions of the two ends of the fuse 2, so as to increase the friction and the sealing performance when the fuse 2 is inserted into the pipeline body 11.
In some other embodiments of the present application, the fuse 2 may be integrally formed with the pipe body 11, and the fuse 2 is directly combined with the pipe body 11, which may improve the sealing performance of the sub-cooling pipe 10.
Alternatively, one end of the pipe body 11 adjacent to the fuse 2 is provided with a plurality of injection holes, which communicate with the passages in the pipe body 11 and the passages in the fuse 2, respectively.
The end of the pipeline body 11 close to the fuse 2 is provided with a plurality of injection holes, when the fuse 2 is in a normal temperature state, the cooling liquid flows through the injection holes through the passage in the pipeline body 11 and then flows into the passage of the fuse 2 connected with the pipeline body, the injection holes do not interfere with the normal flow of the cooling liquid, when the fuse 2 is heated and melted, the cooling liquid directly flows out of the pipeline body 11 when flowing through the injection holes through the passage in the pipeline body 11 and flows to the battery sub-module 200 at the lower side of the pipeline body 11, and the cooling liquid is divided by the plurality of injection holes through the arrangement of the injection holes, the area of the injection holes is smaller than the area of the passage of the pipeline body 11, therefore, when flowing through the injection holes from the passage of the pipeline body 11, the flow rate of the cooling liquid is increased, the pressure at the injection holes is increased, so that the cooling liquid is guided to be injected to a place far away, and the coverage area of the cooling liquid is increased, the battery sub-module 200 which is slightly far away from the fuse part 2 can be extinguished or cooled, the protection range of the second cooling component is enlarged, and the safety of the power battery assembly is improved.
In some embodiments, as shown in fig. 1, the cooling tubes are configured as flat tubes, the cross-section of the cooling tubes having a dimension in the horizontal direction that is greater than a dimension in the vertical direction.
The cooling tube is located the upside of battery module, and the structure of cooling tube is flat pipe, and it can be understood that, the bottom of cooling tube, the horizontal plane that also is flat tub of cross section is with the battery module contact, for the main area of heat exchange, through the bottom size that increases the cooling tube, can improve the area of contact of cooling tube and battery module, promotes heat exchange efficiency.
Optionally, the cooling fluid in the first cooling assembly and the cooling fluid in the second cooling assembly are the same.
First cooling module is located the downside of battery module, and second cooling unit price is located the upside of battery module, to the upside and the downside of battery module cooling down simultaneously, through adopting the same coolant liquid, the efficiency of heat exchange is the same, and the refrigeration of battery module is even, and the more balanced difference in temperature of surface temperature is less, can improve the security and the life of battery module.
In some embodiments, the first cooling assembly and the second cooling assembly perform cooling through the cooling device after heat exchange, so as to take away heat of the battery module, and the low-temperature cooling liquid can be circulated again to cool the battery module. Through setting up same coolant liquid, can get into same cooling device with the coolant liquid mixing in the coolant liquid in the first cooling module and the coolant liquid in the second cooling module, rather than set up first heat sink and second heat sink respectively and handle two kinds of coolant liquids respectively, the coolant liquid treatment cost that sets up same kind of coolant liquid is lower to can save and arrange the space.
Specifically, the cooling liquid in the first cooling assembly and the cooling liquid in the second cooling assembly are both ethylene glycol.
In other embodiments, the cooling liquid in the first cooling module and the cooling liquid in the second cooling module can be replaced by other fire extinguishing or cooling media, which also falls into the protection scope of the present application.
In some embodiments of the present application, the second cooling member 1 is configured as a harmonica tube, and a plurality of sequentially adjacent cooling liquid channels are provided in the harmonica tube.
Be provided with a plurality of adjacent coolant liquid passageways in the harmonica pipe, that is to say, second cooling part 1 separates into a plurality of flow paths with the coolant liquid, when fuse 2 is heated and melts completely, the coolant liquid flows through when hot melt department through a plurality of flow paths in the harmonica pipe, direct outside towards the harmonica pipe flows out, the battery submodule group 200 of flow direction harmonica pipe downside, and through separating into a plurality of flow paths with the coolant liquid, the velocity of flow of coolant liquid can accelerate, the pressure increase of hot melt department, thereby can be farther with the coolant liquid direction jetted distance, thereby improve the area covered by coolant liquid, can play the effect of putting out naked light or cooling to the battery submodule group 200 that is a little far away from fuse 2, promote the protection scope of harmonica pipe, promote the security of power battery assembly.
In other embodiments, a plurality of cooling liquid channels which are adjacent in sequence are arranged in the fuse part 2, when the fuse part 2 is heated and is not completely melted, the part of the hot melt part close to the lower side is melted first, the cooling liquid flows to the battery module from the melted part, and the plurality of cooling liquid channels which are adjacent in sequence in the fuse part 2 and are not completely melted are provided with intact channels for the cooling liquid to flow through, and the cooling liquid can flow in the second cooling part 1 to reduce the temperature of the battery module. When the battery module is from a plurality of ignition points, can provide the coolant liquid for the fuse-link 2 of complete melting and flow out at a plurality of ignition points, promote the security of power battery assembly.
A vehicle according to an embodiment of the present application is described below.
According to the vehicle of this application embodiment, including above-mentioned any power battery assembly, through setting up above-mentioned power battery assembly, when power battery assembly takes place the thermal runaway, cooling module can make the reaction fast, initiatively put out the naked light, cool down to the battery module that takes place the thermal runaway, and can reduce the probability that power battery assembly secondary reignites, the security is improved, the condition that the vehicle is fired or even explodes because of power battery assembly trouble has been reduced, cooling module does not need artifical initiative operation can initiatively handle the dangerous situation, and the reaction is rapid, provide safe time for user of service and all around, also provide the guarantee for follow-up rescue processing work.
The structure and operation of the power cell assembly in one embodiment will now be described with reference to fig. 1-3.
The power battery assembly includes: the battery module, first cooling module and second cooling module, first cooling module sets up the downside in order to cool off the downside of battery module at the downside of battery module, the upside in order to cool off the upside of battery module of second cooling module setting, all be provided with the coolant liquid passageway in first cooling module and the second cooling module, coolant liquid in the first cooling module is the same with the coolant liquid in the second cooling module, be the ethylene glycol, first cooling module and second cooling module flow into same cooling device through the coolant liquid with the battery module heat exchange and refrigerate, take away the heat of battery module, microthermal coolant liquid can circulate once more and cool down the battery module.
First cooling module and second cooling module are flat cooling pipe, and the battery module includes a plurality of electric cores 201, and a plurality of electric cores 201 are often distributed owing to the structure of battery box body is divided or is arranged in order to satisfy the demand of arranging, forms a plurality of submodule groups 200 promptly, and flat cooling pipe also divide into a plurality of flat sub-cooling pipe, and flat sub-cooling pipe corresponds a plurality of submodule groups 200 through the joint glue and sets up. The sub-cooling flat tube is composed of a plurality of pipeline bodies 11 and a plurality of fusing parts 2, the fusing parts 2 are arranged between the pipeline bodies 11, mutually communicated passages are formed in the pipeline bodies 11 and the fusing parts 2, and cooling liquid can flow in the passages. One end of the pipeline body 11, which is adjacent to the fuse part 2, is provided with a plurality of injection holes, the plurality of injection holes are respectively communicated with a passage in the pipeline body 11 and a passage in the fuse part 2, the fuse part 2 is in plug-in fit with the adjacent pipeline body 11, and a sealing ring 21 is arranged between the fuse part 2 and the adjacent pipeline body 11.
When battery module normal during operation, power battery assembly temperature does not reach the melting point of hot melt spare, and the hot melt spare is the normal temperature attitude, maintains the normal flow of coolant liquid in the coolant liquid passageway, the cooling work of the flat pipe of supplementary cooling, and the coolant liquid flows in flat cooling pipe, takes away the heat that the battery module produced with battery module emergence heat exchange, flows into same cooling device and refrigerates afterwards, but microthermal coolant liquid recirculation gets into flat cooling pipe and cools down the battery module.
And when battery module thermal runaway, the battery module produces high temperature, even fire, temperature sharply risees in the power battery assembly, the fusing point of hot melt spare is reachd to the temperature, the hot melt spare is heated fusing, thereby will cool off the battery module of the interior thermal runaway of coolant liquid direction that flows of flat intraductal, and through setting up the jet orifice, the coolant liquid will be shunted by a plurality of jet orifices, the velocity of flow of coolant liquid can increase soon, the pressure increase of jet orifice department, thereby spray the coolant liquid direction to the farther place of distance, improve the cover area of coolant liquid, the open fire can be put out to the coolant liquid, prevent the intensity of a fire to stretch, and the coolant liquid still can directly contact with the battery module, improve heat exchange efficiency, cool down the battery module, and the coolant liquid can block air and battery module contact, the condition that the reduction produces open fire once more takes place.
Other configurations, such as cooling devices and cells, and operations of power battery assemblies according to embodiments of the present disclosure are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A power battery assembly for a vehicle, comprising:
a battery module;
a first cooling assembly disposed at a lower side of the battery module to cool the lower side of the battery module;
a second cooling assembly disposed at an upper side of the battery module to cool the upper side of the battery module; wherein
The second cooling assembly is internally provided with a cooling liquid passage, and the second cooling assembly is also provided with a fuse piece which is suitable for being heated and fused when the battery module is on fire so as to guide the cooling liquid in the cooling liquid passage to a fire source.
2. The power battery assembly for vehicles according to claim 1, wherein the battery module includes: a plurality of sub-modules, the second cooling assembly comprising: and the second cooling pieces are arranged on the upper sides of the corresponding sub-modules, and the second cooling pieces are provided with the fusing pieces.
3. The power battery assembly for a vehicle according to claim 2, wherein the second cooling assembly is configured as a cooling pipe, and the second cooling member is configured as a sub-cooling pipe on which the fuse member is provided.
4. The power battery assembly for a vehicle according to claim 3, wherein the sub-cooling pipe includes: the pipeline comprises a plurality of spaced pipeline bodies, and the fuse link is arranged between every two adjacent pipeline bodies.
5. The power battery assembly for the vehicle according to claim 4, wherein the pipe body and the fuse have passages therein that communicate with each other, the pipe body and the fuse together defining a sub-cooling passage, and a plurality of the sub-cooling passages communicate with each other to define the cooling liquid passage.
6. The power battery assembly for the vehicle according to claim 5, wherein the fuse is in plug-in fit with the adjacent pipeline body, and a seal ring is arranged between the fuse and the adjacent pipeline body.
7. The power battery assembly for a vehicle according to claim 6, wherein an end of the pipe body adjacent to the fuse is provided with a plurality of injection holes that communicate with the passage in the pipe body and the passage in the fuse, respectively.
8. The power battery assembly for a vehicle according to claim 3, wherein the cooling pipe is configured as a flat pipe, and a dimension in a horizontal direction of a cross section of the cooling pipe is larger than a dimension in a vertical direction.
9. The power battery assembly for a vehicle according to claim 3, wherein the coolant in the first cooling module and the coolant in the second cooling module are the same.
10. A vehicle comprising a power cell assembly according to any of claims 1-9.
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| CN202110845331.5A CN113471591A (en) | 2021-07-26 | 2021-07-26 | Power battery assembly for vehicle and vehicle with power battery assembly |
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| CN202110845331.5A CN113471591A (en) | 2021-07-26 | 2021-07-26 | Power battery assembly for vehicle and vehicle with power battery assembly |
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