CN117374502B - Lithium battery pack with flame-retardant mechanism - Google Patents
Lithium battery pack with flame-retardant mechanism Download PDFInfo
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- CN117374502B CN117374502B CN202311490919.9A CN202311490919A CN117374502B CN 117374502 B CN117374502 B CN 117374502B CN 202311490919 A CN202311490919 A CN 202311490919A CN 117374502 B CN117374502 B CN 117374502B
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- lithium battery
- battery pack
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- retardant
- plate
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 164
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 239000003063 flame retardant Substances 0.000 title claims abstract description 63
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000011261 inert gas Substances 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 18
- 239000000110 cooling liquid Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 13
- 239000004831 Hot glue Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 6
- 230000007480 spreading Effects 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 description 9
- 150000002641 lithium Chemical class 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- H01M10/63—Control systems
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
-
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
-
- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Automation & Control Theory (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a lithium battery pack with a flame-retardant mechanism, which comprises a shell, wherein a supporting plate is fixedly connected to the lower part of the inside of the shell, a plurality of groups of protection components are arranged above the supporting plate in the shell, and a cooling flame-retardant component and a fireproof component are arranged below the supporting plate in the shell. According to the invention, the temperature-reducing flame-retardant assembly is arranged, the lithium battery pack is cooled in time by detecting temperature change, the bulge condition of the lithium battery pack is detected through the cooling pipe, the cooling effect is quickened, the safety of the lithium battery pack is further improved, the occurrence of capacity loss and even fire or explosion accidents caused by the battery bulge are avoided, when the lithium battery pack explodes, the lithium battery pack is rapidly extinguished and isolated, the fire is prevented from spreading, and larger fire is caused, so that larger loss is caused, and therefore, various conditions of the lithium battery during working can be dealt with.
Description
Technical Field
The invention relates to the technical field of lithium battery protection structures, in particular to a lithium battery pack with a flame-retardant mechanism.
Background
The lithium battery module combines a plurality of lithium battery monomers together according to a certain connection mode to form an integral battery assembly, the lithium battery has poor thermal stability, is inflammable, is easy to be subjected to improper operation behaviors such as collision, extrusion, fire and the like, and can lead to rupture of a diaphragm between an anode and a cathode to cause short circuit and cause thermal runaway;
The application discloses a new energy lithium battery pack, which relates to a battery, and comprises a shell for installing a plurality of batteries, wherein a heat dissipation assembly for cooling the batteries is arranged in the shell, a sealing cover for sealing the shell is arranged on the shell, ventilation holes are formed in the sealing cover, and a ventilation assembly for opening the ventilation holes is arranged on the sealing cover.
Although the device can cool down the lithium battery pack, the device cannot be adjusted according to the temperature change of the lithium battery, and cannot cope with various conditions of the lithium battery during working, if the bulge condition occurs, the device cannot timely cope with the conditions, the temperature can rise, the performance of a battery cell can be reduced, the capacity loss can even cause fire or explosion accidents, if the lithium battery suddenly explodes, the lithium battery cannot timely cope with the conditions, and the huge fire of the explosion accidents can cause fire spreading to cause larger fire.
Disclosure of Invention
The invention aims to provide a lithium battery pack with a flame-retardant mechanism, which solves the problems that the temperature change of a lithium battery cannot be regulated according to the background technology, various conditions of the lithium battery during operation cannot be met, if the swelling condition occurs, the temperature cannot be timely met, the performance of a battery cell is reduced, the capacity loss even causes fire or explosion accidents, if the explosion accident happens suddenly to the lithium battery, the countermeasures cannot be timely met, and the huge fire of the explosion accident can cause the fire to spread so as to cause larger fire.
In order to achieve the above purpose, the present invention provides the following technical solutions: the lithium battery pack with the flame-retardant mechanism comprises a shell, wherein a supporting plate is fixedly connected to the lower position inside the shell, a plurality of groups of protection components are arranged above the supporting plate inside the shell, and a plurality of cooling flame-retardant components and fireproof components are arranged below the supporting plate inside the shell;
the lithium battery packs are arranged in the protection assemblies, the outer wall of each lithium battery pack is provided with a flame-retardant partition plate and a temperature sensor, the lithium battery packs are equidistantly arranged at the top of the supporting plate, the lithium battery packs on the same side are in one group, and each group of lithium battery packs corresponds to one cooling flame-retardant assembly and one fireproof assembly;
The cooling flame-retardant assembly comprises a conveying water pump, the conveying water pump is arranged in a shell and located below a supporting plate, a liquid discharge pipe of the conveying water pump is connected with a conveying pipe, the conveying pipe is divided into a plurality of pieces matched with each other in number of lithium battery packs, each piece of conveying pipe is provided with a water pressure sensor, each piece of conveying pipe is provided with a cooling pipe between each lithium battery pack and a flame-retardant partition board, the cooling pipes are arranged on the outer wall of the lithium battery pack in a multi-layer encircling mode, a plurality of rigid supporting rods are fixed between each cooling pipe, a thermal expansion air bag is arranged between each flame-retardant partition board and each cooling pipe, the thermal expansion air bag is attached to the flame-retardant partition board and the cooling pipe, inert gas is filled in the thermal expansion air bag, the cooling pipe is extruded when the thermal expansion air bag is heated and expanded, the cooling pipe is deformed, the contact area of each cooling pipe is increased, and when the temperature sensor detects that the temperature reaches a temperature threshold value, the conveying water pump is started.
Preferably, each conveying pipe is connected with one end of a cooling pipe on a plurality of lithium battery packs by penetrating through a supporting plate, one side of the conveying water pump is connected with a cooler through a liquid suction pipe, one side of the cooler is connected with a cooling liquid tank through a connecting pipe, one side of the cooling liquid tank is provided with a reflux water pump, a liquid discharge pipe of the reflux water pump is connected with the cooling liquid tank, a reflux pipe is connected with a liquid suction pipe of the reflux water pump, the reflux pipe is divided into a plurality of pieces matched with the lithium battery packs in number, and each reflux pipe is connected with the other end of the cooling pipe on a plurality of lithium battery packs by penetrating through the supporting plate.
Preferably, the protection component comprises a fixed plate and a movable plate, wherein the two fixed plates and the movable plate are in a group, the two fixed plates are respectively arranged on two sides of the lithium battery pack and are fixedly connected with the top of the supporting plate, the two sides of the fixed plate are fixedly connected with limiting rods, the movable plate in each group is in sliding connection with the limiting rods on the two sides, the movable plate is in sliding connection with the supporting plate, and the two sides of the fixed plate are respectively movably connected with a fixed block on the top of the movable plate.
Preferably, four connecting plates are fixedly connected at four corners above the outer wall of the flame-retardant partition plate, the four connecting plates are all connected with movable rods in a sliding mode, two movable rods on the same side are a group, and the top of each group of movable rods is fixedly connected with a connecting plug block.
Preferably, the outer wall of the movable rod is provided with a first spring between the connecting plug block and the connecting plate, the bottom of the movable rod is fixedly connected with a limiting block, the outer wall of the movable rod is sleeved with a fixed sleeve between the limiting block and the connecting plate, and the fixed sleeve is made of thermoplastic materials.
Preferably, a second spring is arranged on the outer wall of each limiting rod and positioned between the fixed plate and the movable plate, and a hot melt adhesive is arranged at the joint of the fixed block and the fixed plate and between the fixed block and the movable plate.
Preferably, the bottom surface of lithium cell package is laminated with the top surface of backup pad, the draw-in groove that matches each other with the fly leaf has been seted up to one side of the fly leaf that fire-retardant baffle is close to, the top fixedly connected with of fly leaf and the fixture block of the mutual matching of draw-in groove.
Preferably, the fireproof assembly comprises an inert gas storage bottle, the inert gas storage bottle is arranged in the shell and located below each group of lithium battery packs, a smoke high-temperature detection probe is arranged at the upper position of the inner part of the shell, and a jet pipe is connected to a jet port of the inert gas storage bottle.
Preferably, the spray pipe is divided into a plurality of pieces matched with each group of lithium battery packs, each spray pipe penetrates through two sides of the supporting plate fixedly connected with the lithium battery packs respectively, and the top of the spray pipe is fixedly connected with a spray head.
Preferably, the bottoms of the two connecting plug blocks are respectively connected with positive and negative electrode interfaces of the lithium battery pack, the top of the connecting plug block is movably connected with a connector, and the top of the shell is provided with a cover plate.
The invention has the beneficial effects that:
1. According to the invention, the temperature-reducing flame-retardant assembly is arranged, so that the lithium battery pack can be timely cooled by detecting temperature change, the risks of reduced battery performance, fire disaster, explosion and the like of the lithium battery caused by overheating of the lithium battery pack are avoided, the bulge condition of the lithium battery pack can be detected by the cooling pipe to be timely processed, the cooling effect is accelerated, the safety of the lithium battery pack is further improved, the capacity loss caused by the bulge of the battery and even fire or explosion accidents are avoided, and the lithium battery pack can be rapidly extinguished and isolated when the lithium battery pack explodes, so that the fire is prevented from spreading, and larger fire is caused, and larger loss is caused, so that various conditions of the lithium battery during working can be dealt with;
2. According to the lithium battery pack fixing device, the protection component is arranged, the fixing plate, the movable plate, the first thrust spring and the fixing block are mutually matched to fix the lithium battery pack, the fixing block is connected to the fixing plate and the movable plate through the hot melt adhesive, when the lithium battery pack in the shell is in thermal failure, the hot melt adhesive is melted at high temperature to reduce the fixing strength of the fixing plate and the limiting rod by the fixing block when the high temperature environment is generated, then the limiting rod is sprung out through the elastic force of the first thrust spring, the fixing of the lithium battery pack is released, a plurality of bolts are not required to be screwed for disassembly, and the lithium battery packs are separated in the effective time, so that the subsequent treatment is facilitated;
3. According to the lithium battery pack, the protection assembly is arranged, the connecting plug block, the fixing sleeve and the second thrust spring are matched with the connector, and the fixing sleeve is made of thermoplastic plastics, so that the fixing sleeve is heated and softened when the lithium battery pack generates high temperature, the elastic force of the second thrust spring is lost, the connecting plug block is driven to rise by the elastic force of the second thrust spring, the lithium battery pack and a power supply circuit are conveniently cut off, the lithium battery pack is prevented from continuously working when overheated or burnt, and the explosion probability is reduced;
4. according to the invention, the fireproof assembly is arranged, the inert gas storage bottle is connected with the fixed sleeve and the spray head, and the smoke high-temperature detection probe is matched, so that the internal environment of the shell can be detected, when abnormal smell, a large amount of smoke and the like appear around the fire-extinguishing agent, the inert gas extinguishing agent in the inert gas storage bottle is sprayed out, so that the inert environment is formed around the lithium battery pack, the combustion of the lithium battery pack is prevented, the open fire condition is avoided, the fire is conveniently prevented, and the fire extinguishing speed is further improved under the cooperation of the fire-extinguishing agent and the cooling flame-retardant assembly.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a lithium battery pack with a flame retardant mechanism according to the present invention;
Fig. 2 is a front view showing the internal structure of a case in the overall structure of a lithium battery pack having a flame retardant mechanism according to the present invention;
FIG. 3 is a partial internal cross-sectional view of a flame retardant separator having a flame retardant mechanism lithium battery pack according to the present invention;
FIG. 4 is an assembly view of a portion of a cooling tube in a lithium battery pack having a flame retardant mechanism according to the present invention;
FIG. 5 is a block diagram of a cooling tube in a lithium battery pack with a flame retardant mechanism according to the present invention;
FIG. 6 is a schematic view of a protective assembly in a lithium battery pack with a flame retardant mechanism according to the present invention;
fig. 7 is a left side view showing the internal structure of a case in the overall structure of a lithium battery pack having a flame retardant mechanism according to the present invention;
fig. 8 is a schematic view showing the internal structure of a lithium battery pack in the overall structure of a lithium battery pack with a flame retardant mechanism according to the present invention;
fig. 9 is a top view of the overall structure of a lithium battery pack with a flame retardant mechanism according to the present invention.
In the figure: 1. a housing; 2. a support plate; 3. a cover plate; 4. a protection component; 401. a fixing plate; 402. a movable plate; 403. a limit rod; 404. a fixed block; 405. a connecting plate; 406. a movable rod; 407. connecting the plug blocks; 408. a first spring; 409. a limiting block; 410. a fixed sleeve; 411. a second spring; 412. a clamping groove; 413. a clamping block; 414. a connector; 5. a temperature-reducing flame-retardant component; 501. a delivery water pump; 502. a delivery tube; 503. a water pressure sensor; 504. a cooling tube; 505. a support rod; 506. a thermally expanding balloon; 507. a cooler; 508. a cooling liquid tank; 509. a reflux water pump; 510. a return pipe; 6. a fire protection assembly; 601. an inert gas storage bottle; 602. a smoke high-temperature detection probe; 603. a spray pipe; 604. a spray head; 7. a lithium battery pack; 8. flame retardant separator; 9. a temperature sensor.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Various conditions that the lithium cell can appear at the during operation, if the swell condition appears, can not in time make the reply, the temperature can rise, can lead to battery electric core performance decline, capacity loss to cause conflagration or explosion accident even, if the lithium cell takes place the explosion accident suddenly, not in time make the reply handle, the huge fire of explosion accident can cause the fire to spread and cause bigger conflagration.
Referring to fig. 1-8, a lithium battery pack with a flame-retardant mechanism comprises a fixed shell 1, a supporting plate 2 is fixedly connected to the lower part of the inside of the fixed shell 1, a plurality of groups of protection components 4 are arranged above the supporting plate 2 in the fixed shell 1, a cooling flame-retardant component 5 and a fireproof component 6 are arranged below the supporting plate 2 in the fixed shell 1, lithium battery packs 7 are arranged in the plurality of groups of protection components 4, a flame-retardant baffle 8 and a temperature sensor 9 are arranged on the outer wall of each lithium battery pack 7 at equal intervals on the top of the supporting plate 2, the lithium battery packs 7 on the same side are in a group, each group of lithium battery packs 7 corresponds to one cooling flame-retardant component 5 and fireproof component 6, the cooling flame-retardant component 5 comprises a conveying water pump 501, the conveying water pump 501 is arranged inside the fixed shell 1 and is positioned below the supporting plate 2, the liquid discharge pipe of the conveying water pump 501 is connected with conveying pipes 502, the conveying pipes 502 are divided into a plurality of pieces which are matched with each group of lithium battery packs 7 in number, each conveying pipe 502 is provided with a water pressure sensor 503, a cooling pipe 504 is arranged between each lithium battery pack 7 and a flame-retardant partition plate 8, the cooling pipes 504 are arranged on the outer wall of the lithium battery pack 7 in a multi-layer surrounding manner, a plurality of rigid supporting rods 505 are fixed between each layer of cooling pipes 504, a thermal expansion air bag 506 is arranged between the flame-retardant partition plate 8 and each cooling pipe 504, the thermal expansion air bag 506 is attached to the flame-retardant partition plate 8 and the cooling pipes 504, inert gas is filled in the thermal expansion air bag 506, when the thermal expansion air bag 506 is heated and expanded, the cooling pipes 504 are extruded, the cooling pipes 504 deform, the contact area between the cooling pipes 504 and the lithium battery packs 7 is increased, when the temperature sensor 9 detects that the temperature reaches a temperature threshold value, the conveying water pump 501 is started, the inert gas may preferably be an inert gas with better thermal expansion, such as helium, so as to enhance the expansion effect of the thermal expansion bladder 506;
Each conveying pipe 502 penetrates through the supporting plate 2 to be connected with one ends of cooling pipes 504 on the lithium battery packs 7, one side of each conveying water pump 501 is connected with a semiconductor cooler 507 through a liquid suction pipe, one side of each semiconductor cooler 507 is connected with a cooling liquid box 508 through a connecting pipe, one side of each cooling liquid box 508 is provided with a backflow water pump 509, a liquid discharge pipe of each backflow water pump 509 is connected with each cooling liquid box 508, backflow water pump 509 liquid suction pipes are connected with backflow pipes 510, backflow pipes 510 are divided into a plurality of pieces which are mutually matched with the lithium battery packs 7 in number, and each backflow pipe 510 penetrates through the supporting plate 2 to be connected with the other ends of the cooling pipes 504 on the lithium battery packs 7.
When the lithium battery pack 7 generates heat in the use process, the temperature sensor 9 on the outer wall of the lithium battery pack 7 detects the temperature rise, when the temperature reaches the temperature threshold value of the temperature sensor 9, the temperature of the lithium battery pack 7 is higher, cooling treatment is needed, the swelling phenomenon of the lithium battery pack 7 is prevented, the conveying water pump 501 is started, the liquid discharge pipe of the conveying water pump 501 is connected with the conveying pipe 502, the liquid suction pipe of the conveying water pump 501 is connected with the cooler 507, meanwhile, the cooler 507 is connected with the cooling liquid tank 508, so that the conveying water pump 501 extracts cooling liquid from the cooling liquid tank 508 and conveys the cooling liquid into the cooling pipe 504 surrounding the outer wall of the lithium battery pack 7, the effect of absorbing the heat generated by the lithium battery pack 7 is achieved, the cooling efficiency is improved, the over-high internal temperature of the lithium battery pack 7 is prevented from spontaneous combustion, meanwhile, the pressure difference between the over-high internal temperature of the lithium battery pack 7 and the external environment is avoided, the possibility of explosion of the lithium battery pack 7 is reduced, the safety performance of the lithium battery is improved, and the cooling liquid returns to the cooling liquid tank 508 again through the reflux water pump 509 and the reflux pipe 510, and the recycling is facilitated;
When the lithium battery pack 7 suddenly bulges, as the cooling pipes 504 are arranged on the outer wall of the lithium battery pack 7 in a multi-layer surrounding manner, a plurality of supporting rods 505 are fixed between each layer of cooling pipes 504, the cooling pipes 504 and the supporting rods 505 are pushed outwards when the lithium battery pack 7 bulges, at this time, the cooling pipes 504 are pushed, the water pressure in the conveying pipes 502 and the cooling pipes 504 can be increased, the water pressure sensor 503 detects the change of the water pressure, when the pressure threshold value of the water pressure sensor 503 is reached, the water pressure sensor 503 controls the water conveying pump 501 to start, the water circulation cooling is performed, the temperature can be greatly increased when the lithium battery pack 7 bulges, the temperature can not be quickly reduced only by the water circulation, fire or explosion can possibly be caused, inert gas is filled in the thermal expansion air bags 506, the inert gas in the thermal expansion air bags 506 gradually expands along with the gradual increase of the temperature, the cooling pipes 504 in the thermal expansion air bags are extruded, the cooling pipes 504 deform, the contact area between the cooling pipes 504 and the outer wall of the lithium battery pack 7 after the extrusion deformation can be increased, thereby increasing the heat dissipation effect on the lithium battery pack 7, and the lithium battery pack 7 can be prevented from being cooled more rapidly;
When the lithium battery pack 7 suddenly explodes, the lithium battery pack 7 rapidly expands and the expansion degree is larger, at this time, the lithium battery pack 7 with larger expansion further pushes the cooling pipes 504, so that the cooling pipes 504 generate larger deformation, a plurality of support rods 505 are fixed between each layer of cooling pipes 504, the connection parts of the cooling pipes 504 and the support rods 505 are pulled to crack due to the larger deformation of the cooling pipes 504, or the support rods 505 puncture the cooling pipes 504, at this time, cooling liquid in the cooling pipes 504 can be sprayed out to extinguish fire and cool the lithium battery pack 7, meanwhile, the larger extrusion can also cause the thermal expansion air bags 506 to crack, inert gas in the lithium battery pack 7 can be sprayed out after the thermal expansion air bags 506 crack, the inert gas further accelerates the fire extinguishing speed, and the flame retardant baffle 8 is arranged on the outer wall of the lithium battery pack 7, so that the flame retardant baffle 8 can isolate the lithium battery pack 7 with explosive fire, thereby avoiding fire to the rest of the lithium battery pack 7, and causing larger fire.
In summary, compared with the traditional lithium battery pack, the lithium battery pack 7 can be cooled in time by detecting temperature change, so that the battery performance of the lithium battery is prevented from being reduced due to overheat of the lithium battery pack 7, risks such as fire and explosion caused by short circuit are avoided, the bulge condition of the lithium battery pack 7 can be detected through the cooling pipe 504 to be treated in time, the cooling effect is quickened, the safety of the lithium battery pack 7 is further improved, the occurrence of capacity loss and even fire or explosion accidents caused by the battery bulge is avoided, the lithium battery pack 7 can be rapidly extinguished and isolated when the lithium battery pack 7 explodes, the fire is prevented from spreading, and larger fire is caused, so that the lithium battery pack can cope with various conditions caused by the working of the lithium battery.
Example two
In the actual use process, if the power supply line is not cut off in the process of cooling and extinguishing the lithium battery pack 7 when a fire occurs, the explosion probability is greatly increased due to short circuit, so the device described in the above embodiment is improved.
Referring to fig. 1 to 9, the protection assembly 4 includes a fixed plate 401 and a movable plate 402, the two fixed plates 401 and the movable plate 402 are combined into a group, the two fixed plates 401 are respectively installed at both sides of the lithium battery pack 7, and fixedly connected with the top of the supporting plate 2, the fixed plates 401 on both sides are fixedly connected with limiting rods 403, the movable plates 402 in each group are in sliding connection with the limiting rods 403 on both sides, the movable plates 402 are in sliding connection with the supporting plate 2, the fixed blocks 404 are movably connected with the tops of the fixed plates 401 on both sides and the movable plates 402, four connecting plates 405 are fixedly connected with four corners above the outer wall of the flame-retardant partition plate 8, movable rods 406 are slidably connected with the four connecting plates 405, wherein two movable rods 406 positioned on the same side are in a group, the top of each group of movable rods 406 is fixedly connected with a connecting plug 407, a first spring 408 is arranged on the outer wall of the movable rod 406 and between the connecting plug 407 and the connecting plate, the bottom of the movable rod 406 is fixedly connected with a limiting block 409, the outer wall of the movable rod 406, and be located between stopper 409 and the connecting plate 405 the cover be equipped with fixed cover 410, and fixed cover 410 is thermoplastic material setting, the outer wall of every gag lever post 403 just is located between fixed plate 401 and the fly leaf 402 and is provided with second spring 411, fixed block 404 and fixed plate 401 and fly leaf 402's junction is provided with the hot melt adhesive, the bottom surface of lithium cell package 7 and the top surface laminating of backup pad 2, the draw-in groove 412 that mutually matches with fly leaf 402 has been seted up to one side of fly leaf 402 that fire-retardant baffle 8 is close to, the top fixedly connected with of fly leaf 402 and draw-in groove mutually match's fixture block 413, the bottom of two connection inserts 407 respectively with the positive and negative interface connection of lithium cell package 7, the top swing joint of connection insert 407 has connector 414, casing 1's top is provided with apron 3.
When the lithium battery pack 7 is used, the lithium battery pack 7 is clamped between the fixed plates 401 and the movable plates 402, the clamping blocks 413 on the movable plates 402 are clamped into the clamping grooves 412 in the lithium battery pack 7 through adjustment, then, the hot melt adhesive is coated on one end, far away from each other, of the fixed plates 401 and the movable plates 402, the fixed blocks 404 are clamped on the fixed plates 401 and the movable plates 402, and after the lithium battery pack 7 is fixed, the connecting heads 414 can be inserted into the connecting plug blocks 407, so that the installation and fixation process of the lithium battery pack 7 is completed;
Because the fixed sleeve 410 is thermoplastic plastic, can be when the lithium battery package 7 produces high temperature, fixed sleeve 410 is heated and softened, thereby lose the effect that prevents first spring 408 elasticity, utilize the elasticity of first spring 408, drive the connection plug 407 and rise, be convenient for cut off lithium battery package 7 and power supply line, keep on working when avoiding lithium battery package 7 overheated or burning, simultaneously, the high temperature can make the fixed block 404 melt with the hot melt adhesive of fixed plate 401 and fly leaf 402 junction, thereby reduce the fixed strength of fixed block 404 to fixed plate 401 and fly leaf 402, make second spring 411 accessible elasticity push away fly leaf 402, release the effect of fixing lithium battery package 7, be convenient for dismantle the battery in effective time, be convenient for follow-up.
Example III
In the actual use process, when a plurality of lithium battery packs 7 are on fire, the fire will be larger, and the fire cannot be extinguished quickly only by the cooling flame retardant assembly 5, so the device described in the above embodiment is improved in this embodiment.
Referring to fig. 1-9, the fireproof assembly 6 comprises an inert gas storage bottle 601, the inert gas storage bottle 601 is arranged in the shell 1 and located below the support plate 2, a smoke high-temperature detection probe 602 is arranged at the upper position in the shell 1, a spray pipe 603 is connected to a gas nozzle of the inert gas storage bottle 601, the spray pipe 603 is divided into a plurality of pieces matched with each group of lithium battery packs 7, each spray pipe 603 penetrates through two sides of the support plate 2 and is fixedly connected with the lithium battery packs 7, and a spray head 604 is fixedly connected to the top of the spray pipe 603.
Through smog high temperature test probe 602, can detect the inside smog of casing 1 with the temperature, through making inert gas storage bottle 601 jet open, inside spouting casing 1 with inert gas through shower nozzle 604, make the volume of inert gas expand sharply and absorb a large amount of heat, be convenient for reduce the inside temperature of casing 1, be convenient for dilute the oxygen concentration in the casing 1 simultaneously, play the effect of stifling put out a fire, avoid appearing the open flame condition, be convenient for fire-retardant put out a fire, further improve fire extinguishing speed under the cooperation with the fire-retardant subassembly of cooling 5.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (9)
1. The lithium battery pack with the flame-retardant mechanism comprises a shell (1), and is characterized in that a supporting plate (2) is fixedly connected to the lower position of the interior of the shell (1), a plurality of groups of protection components (4) are arranged above the supporting plate (2) in the interior of the shell (1), and a plurality of cooling flame-retardant components (5) and fireproof components (6) are arranged below the supporting plate (2) in the interior of the shell (1);
A plurality of groups of lithium battery packs (7) are arranged in the protection component (4), the outer wall of each lithium battery pack (7) is provided with a flame-retardant baffle plate (8) and a temperature sensor (9), the lithium battery packs (7) are equidistantly arranged at the top of the supporting plate (2), the lithium battery packs (7) at the same side are in a group, and each group of lithium battery packs (7) corresponds to one cooling flame-retardant component (5) and one fireproof component (6);
The cooling flame-retardant assembly (5) comprises a conveying water pump (501), the conveying water pump (501) is arranged in the shell (1) and is positioned below the supporting plate (2), a liquid discharge pipe of the conveying water pump (501) is connected with a conveying pipe (502), the conveying pipe (502) is divided into a plurality of pieces matched with each group of lithium battery packs (7), each conveying pipe (502) is provided with a water pressure sensor (503), a cooling pipe (504) is arranged between each lithium battery pack (7) and a flame-retardant partition plate (8), the cooling pipe (504) is arranged in a multi-layer surrounding mode and is arranged on the outer wall of the lithium battery pack (7), a plurality of rigid supporting rods (505) are fixed between each layer of cooling pipe (504), a thermal expansion air bag (506) is arranged between the flame-retardant partition plate (8) and the cooling pipe (504), inert gas is filled in each thermal expansion air bag (506), when the thermal expansion air bag (506) is in contact with the lithium battery packs (7), the temperature sensor (504) can be extruded to the temperature sensor (9), the temperature sensor (504) can be increased when the temperature of the thermal expansion air bag (504) is extruded to the temperature sensor (7) and the temperature sensor (504) is increased, the conveying water pump (501) is started;
Every conveyer pipe (502) all runs through backup pad (2) and is connected with the one end of cooling tube (504) on a plurality of lithium cell package (7), one side of conveyer pump (501) is connected with cooler (507) through the drawing liquid pipe, one side of cooler (507) is connected with cooling liquid case (508) through the connecting pipe, one side of cooling liquid case (508) is provided with backward flow water pump (509), the fluid-discharge tube and the cooling liquid case (508) of backward flow water pump (509) are connected, backward flow water pump (509) drawing liquid union coupling has back flow (510), back flow (510) reposition of redundant personnel are a plurality of roots that match each other with lithium cell package (7) quantity, and every back flow (510) all runs through backup pad (2) and is connected with the other end of cooling tube (504) on a plurality of lithium cell package (7).
2. The lithium battery pack with the flame-retardant mechanism according to claim 1, wherein the protection component (4) comprises a fixed plate (401) and a movable plate (402), the two fixed plates (401) and the movable plate (402) are combined into a group, and the two fixed plates (401) are respectively arranged at two sides of the lithium battery pack (7) and fixedly connected with the top of the supporting plate (2), and the two sides are fixedly connected with each other
The fixed plates (401) are fixedly connected with limiting rods (403), the movable plates (402) in each group are in sliding connection with the limiting rods (403) on two sides, the movable plates (402) are in sliding connection with the supporting plates (2), and the fixed blocks (404) are movably connected with the tops of the fixed plates (401) and the movable plates (402) on two sides.
3. The lithium battery pack with the flame-retardant mechanism according to claim 1, wherein four connecting plates (405) are fixedly connected to four corners above the outer wall of the flame-retardant partition plate (8), movable rods (406) are slidably connected to the four connecting plates (405), two movable rods (406) on the same side are combined into a group, and a connecting plug (407) is fixedly connected to the top of each group of movable rods (406).
4. A lithium battery pack with a flame-retardant mechanism according to claim 3, characterized in that a first spring (408) is arranged on the outer wall of the movable rod (406) and between the connecting plug (407) and the connecting plate, a limiting block (409) is fixedly connected to the bottom of the movable rod (406), a fixed sleeve (410) is sleeved on the outer wall of the movable rod (406) and between the limiting block (409) and the connecting plate (405), and the fixed sleeve (410) is made of a thermoplastic material.
5. A lithium battery pack with a flame-retardant mechanism according to claim 2, characterized in that a second spring (411) is arranged between the fixed plate (401) and the movable plate (402) on the outer wall of each limit rod (403), and a hot melt adhesive is arranged at the joint of the fixed block (404) and the fixed plate (401) and the movable plate (402).
6. The lithium battery pack with the flame-retardant mechanism according to claim 5, wherein the bottom surface of the lithium battery pack (7) is attached to the top surface of the supporting plate (2), a clamping groove (412) matched with the movable plate (402) is formed in one side of the movable plate (402) close to the flame-retardant partition plate (8), and a clamping block (413) matched with the clamping groove is fixedly connected to the top of the movable plate (402).
7. The lithium battery pack with the flame-retardant mechanism according to claim 1, wherein the fireproof assembly (6) comprises an inert gas storage bottle (601), the inert gas storage bottle (601) is arranged inside the shell (1) and located below each group of lithium battery packs (7), a smoke high-temperature detection probe (602) is arranged at the upper position inside the shell (1), and a spray pipe (603) is connected to a spray port of the inert gas storage bottle (601).
8. The lithium battery pack with the flame-retardant mechanism according to claim 7, wherein the spray pipes (603) are divided into a plurality of pieces matched with each group of lithium battery packs (7), each spray pipe (603) penetrates through the supporting plate (2) to be fixedly connected with two sides of each lithium battery pack (7), and a spray head (604) is fixedly connected to the top of each spray pipe (603).
9. A lithium battery pack with a flame-retardant mechanism according to claim 3, characterized in that the bottoms of the two connecting plug blocks (407) are respectively connected with positive and negative interfaces of the lithium battery pack (7), the top of the connecting plug blocks (407) is movably connected with a connector (414), and the top of the shell (1) is provided with a cover plate (3).
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| CN117937012B (en) * | 2024-03-21 | 2024-08-02 | 广东朋昊鑫动力新能源有限公司 | Explosion-proof lithium battery pack |
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| KR102123684B1 (en) * | 2019-03-30 | 2020-06-16 | 우석대학교 산학협력단 | ESS battery apparatus having fire extinguisher function |
| CN115642355A (en) * | 2022-10-09 | 2023-01-24 | 刘洪涛 | Soft package lithium battery |
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| JP5993209B2 (en) * | 2012-05-24 | 2016-09-14 | タイガースポリマー株式会社 | Battery cooling structure |
| CN107425222A (en) * | 2017-08-08 | 2017-12-01 | 佛山市顺德区精锐电池科技有限公司 | A kind of lithium battery explosion-proof flame-retardant structure |
| CN112201884A (en) * | 2020-09-30 | 2021-01-08 | 东莞汇洋动力科技有限公司 | Automatic battery module, battery package of putting out a fire |
| CN114094268B (en) * | 2021-11-22 | 2024-04-23 | 江苏科技大学 | Power battery protection device and protection method |
| CN115566320B (en) * | 2022-11-10 | 2023-02-07 | 深圳市海斯科技有限公司 | Lithium battery explosion-proof equipment of monitoring and cooling |
| CN116653605A (en) * | 2023-06-07 | 2023-08-29 | 西安航空学院 | New energy automobile power battery protector |
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| KR102123684B1 (en) * | 2019-03-30 | 2020-06-16 | 우석대학교 산학협력단 | ESS battery apparatus having fire extinguisher function |
| CN115642355A (en) * | 2022-10-09 | 2023-01-24 | 刘洪涛 | Soft package lithium battery |
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