CN114614142A - Battery module and battery system - Google Patents
Battery module and battery system Download PDFInfo
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- CN114614142A CN114614142A CN202210210029.7A CN202210210029A CN114614142A CN 114614142 A CN114614142 A CN 114614142A CN 202210210029 A CN202210210029 A CN 202210210029A CN 114614142 A CN114614142 A CN 114614142A
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- flue gas
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- cooling pipeline
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- 239000003546 flue gas Substances 0.000 claims abstract description 233
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 231
- 238000001816 cooling Methods 0.000 claims abstract description 112
- 239000002245 particle Substances 0.000 claims abstract description 95
- 238000001179 sorption measurement Methods 0.000 claims abstract description 90
- 239000007787 solid Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 18
- 239000003063 flame retardant Substances 0.000 claims description 41
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 39
- 239000011247 coating layer Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052794 bromium Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 239000012796 inorganic flame retardant Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
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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)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a battery module and a battery system. The battery module of this application includes: the device comprises a module shell, a first flue gas cooling pipeline, a first particle adsorption device, a plurality of electric cores and a plurality of first flue gas collecting pipelines; each battery cell is provided with a pressure release valve; the first smoke collecting pipeline is arranged corresponding to the battery cell, and two ends of the first smoke collecting pipeline are respectively connected with the first smoke cooling pipeline and the pressure release valve in a sealing manner; the first flue gas collecting pipeline extends out of the outer side of the module shell; first granule adsorption equipment and first flue gas cooling pipeline fixed connection, so high temperature flue gas and the solid particle material that electric core thermal runaway produced spout first flue gas collecting pipe in from the relief valve, then enter into first flue gas cooling passageway and cool down, solid particle is adsorbed by first granule adsorption equipment and is collected and separate with high temperature flue gas, high temperature flue gas is via the outside of first flue gas cooling passageway discharge to the module casing, reduce the risk of lighting on fire once more, improve the security and the reliability of battery.
Description
Technical Field
The application relates to the technical field of chemical batteries, in particular to a battery module and a battery system.
Background
Along with battery capacity is higher and higher, has a plurality of battery module in the battery system usually, when a battery module thermal runaway appeared, along with the situation such as temperature sharply risees usually, the inside flue gas eruption of battery, fire or even explosion, the battery module that fires can transmit the heat for adjacent battery module rapidly, leads to whole battery system's the condition of a fire to stretch, seriously threatens user's personal, property safety.
In the related art, a smoke exhaust channel is provided in an outer case of a battery system, and when thermal runaway of a battery occurs, internal high-temperature smoke may be exhausted to the outside of the battery system through the smoke exhaust channel. However, the high temperature flue gas and solid particles generated by thermal runaway are discharged through the smoke discharging channel at the same time, and the flow of the high temperature flue gas and the solid particles still has the risk of ignition and even explosion during the discharging process.
Disclosure of Invention
The application provides a battery module and battery system to solve the high temperature flue gas that thermal runaway produced and solid particle and pass through the in-process that same passageway was discharged, still exist and be ignited the technical problem who catches fire even explode.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a first aspect of the present application provides a battery module, including: the method comprises the following steps: the device comprises a module shell, a first flue gas cooling pipeline, a first particle adsorption device, a plurality of electric cores and a plurality of first flue gas collecting pipelines; the first particle adsorption device, the plurality of electric cores, the plurality of first smoke collecting pipelines and at least part of first smoke cooling pipelines are arranged in the module shell; each battery cell is provided with a pressure relief valve; the first flue gas collecting pipeline is arranged corresponding to the battery cell, and two ends of the first flue gas collecting pipeline are respectively in sealing connection with the first flue gas cooling pipeline and the pressure release valve; the first flue gas collecting pipeline extends out of the outer side of the module shell; the first particle adsorption device is fixedly connected with the first flue gas cooling pipeline, a first adsorption surface is arranged on the first particle adsorption device, the first adsorption surface is located in a flue gas path in the first flue gas cooling pipeline, and the first adsorption surface is used for adsorbing solid particles.
Compared with the prior art, the battery module that the first aspect of this application provided has following advantage:
the application provides a battery module includes: the method comprises the following steps: the device comprises a module shell, a first flue gas cooling pipeline, a first particle adsorption device, a plurality of electric cores and a plurality of first flue gas collecting pipelines; the first particle adsorption device, the plurality of electric cores, the plurality of first smoke collecting pipelines and at least part of first smoke cooling pipelines are arranged in the module shell; each battery cell is provided with a pressure release valve; the first smoke collecting pipeline is arranged corresponding to the battery cell, and two ends of the first smoke collecting pipeline are respectively connected with the first smoke cooling pipeline and the pressure release valve in a sealing manner; the first flue gas collecting pipeline extends out of the outer side of the module shell; first granule adsorption equipment and first flue gas cooling pipeline fixed connection, first granule adsorption equipment is provided with first adsorption plane, first adsorption plane is arranged in the flue gas route of first flue gas cooling pipeline, first adsorption plane is used for adsorbing solid particle, so, high temperature flue gas and the solid particle material that electric core thermal runaway produced spout first flue gas collecting pipe in from the relief valve, then enter into first flue gas cooling passageway and cool down, and solid particle is adsorbed by first granule adsorption equipment and is collected and separate with high temperature flue gas, high temperature flue gas discharges the outside of module casing via first flue gas cooling passageway, reduce the risk that electric core catches fire, reduce high temperature flue gas, the risk that high temperature solid particle mixture catches fire, the security and the reliability of battery are improved.
As an improvement of the above-mentioned battery module of this application, first flue gas collecting pipe is including collecting the pipeline section and connecting the pipeline section, the first end of collecting the pipeline section with relief valve sealing connection, the second end of collecting the pipeline section with the first end of connecting the pipeline section is connected, the second end of connecting the pipeline section with first flue gas cooling pipeline sealing connection, collecting the pipeline section cross sectional area and reducing gradually from its first end to its second end.
As an improvement of the above-mentioned battery module of this application, first flue gas cooling pipeline includes the pipeline body and sets up first fire retardant coating on the pipeline body internal face, first flue gas collect the pipeline with pipeline body sealing connection.
As an improvement of the above battery module of the present application, the first flame retardant coating layer includes at least one of a phosphorus flame retardant coating layer, a bromine flame retardant coating layer, a nitrogen flame retardant coating layer, and an inorganic flame retardant coating layer.
As an improvement of the above-mentioned battery module of this application, first granule adsorption equipment is provided with a plurality ofly, and is a plurality of first granule adsorption equipment follows the length direction interval arrangement of first flue gas cooling pipeline.
As an improvement of the battery module, a plurality of the battery cells are arranged at intervals along the length direction of the first flue gas cooling pipeline to form a battery unit; the two ends of the battery unit are respectively provided with the first particle adsorption device; and one first particle adsorption device is arranged between every two adjacent electric cores.
As an improvement of the above battery module of the present application, the first particle adsorption device is at least one of a filter screen, an electrostatic adsorption device, and a viscous adsorption device disposed on the first flue gas cooling duct.
As a modification of the above battery module of the present application, the first adsorption face is provided with a second flame retardant coating layer.
A second aspect of the present application provides a battery system, which includes an outer case and the battery module of the first aspect, the battery module is provided with a plurality of, the battery module is installed inside the outer case.
The battery system provided by the second aspect of the present application also has the same advantages as the battery module described in the first aspect, since it includes the battery module described in the first aspect.
As an improvement of the battery system, the battery system further includes a second flue gas cooling pipeline, a second particle adsorption device, and a plurality of second flue gas collecting pipelines, the second flue gas collecting pipelines are arranged corresponding to the battery module, and two ends of each second flue gas collecting pipeline are respectively connected to the second flue gas cooling pipeline and the first flue gas cooling pipeline of the battery module in a sealing manner; the second flue gas collecting pipeline extends out of the outer side of the outer shell; the second particle adsorption device is fixedly connected with the second flue gas cooling pipeline, the second particle adsorption device is provided with a second adsorption surface, the second adsorption surface is located in a flue gas path in the second flue gas cooling pipeline, and the second adsorption surface is used for adsorbing solid particles.
In addition to the technical problems solved by the present application, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems that the battery module and the battery system provided by the present application can solve, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only a part of the embodiments of the present application, and the drawings and the description are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for a person skilled in the art by referring to a specific embodiment, and other drawings can be obtained from the drawings without inventive efforts for the person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a battery system according to an embodiment of the present application.
Description of reference numerals:
10. a module housing; 20. an electric core; 21. a pressure relief valve; 30. a first flue gas cooling duct; 31. a one-way valve; 32. a pipe body; 33. a flame retardant coating; 40. a first particle adsorption unit; 50. a first flue gas collection duct; 51. collecting the pipe section; 52. connecting the pipe sections; 100. an outer housing; 200. a battery module; 300. a second flue gas cooling pipeline; 400. a second particle adsorption unit; 500. a second flue gas collection duct.
Detailed Description
Under the background of carbon peak reaching and carbon neutralization, electrochemical secondary batteries such as lithium batteries and lead-acid batteries are widely applied to the new energy automobile industry and the energy storage industry, but the safety problem therewith becomes one of the factors which troubles the continuous development of the electrochemical secondary batteries. Taking a lithium battery as an example, the lithium battery is easy to trigger the thermal runaway of the battery under the conditions of thermal abuse, electrical abuse and mechanical abuse. When the battery is out of control thermally, the temperature is increased rapidly, the smoke in the battery is erupted, and the battery is on fire or even explodes, which seriously threatens the personal and property safety of users. In practical use, lithium batteries are generally in the form of a group, and when any battery is subjected to thermal runaway and then is subjected to fire explosion, thermal runaway of the rest of the batteries can be induced, and the situation is called thermal runaway diffusion. If the initial battery is ignited and burned after thermal runaway, the thermal runaway of the surrounding battery is induced probably, and the damage degree caused by the thermal runaway ignition situation is larger compared with the situation that only the thermal runaway is not ignited.
In the correlation technique, set up the exhaust fume channel in battery system's shell body, when the battery takes place the thermal runaway, inside high temperature flue gas can discharge to the battery system outside through exhaust fume channel to reduce the risk of firing in battery system inside. However, high-temperature flue gas and solid particles generated by thermal runaway are discharged through the smoke discharging channel, and the flow of the high-temperature flue gas and the solid particles still has the risk of ignition and even explosion during the discharging process.
In view of this, this application embodiment is provided with the relief valve on the battery, and the relief valve passes through flue gas collecting pipe and flue gas cooling pipeline intercommunication, when the inside thermal runaway of taking place of battery leads to pressure to increase, the relief valve is opened under the pressure effect, high temperature flue gas passes through flue gas collecting pipe and gets into flue gas cooling pipeline, flue gas cooling pipeline plays to flue gas cooling and fire-retardant effect, and be provided with particle adsorption equipment on flue gas cooling pipeline, a solid particle for adsorbing thermal runaway eruption, make solid particle and combustible gas separation, reduce the risk of getting on fire once more, improve the security and the reliability of battery.
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 and intended to be used for explaining the present application and should not be construed as limiting the present application.
Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure; fig. 2 is a schematic structural diagram of a battery system according to an embodiment of the present application.
Referring to fig. 1 and 2, an embodiment of the present application provides a battery module 200, which includes: module casing 10, a plurality of electric cores 20, first flue gas cooling pipeline 30, first granule adsorption equipment 40, a plurality of electric cores 20 and a plurality of first flue gas collecting pipe 50, first granule adsorption equipment 40, a plurality of electric cores 20, a plurality of first flue gas collecting pipe 50 and at least partial first flue gas cooling pipeline 30 are installed in module casing 10.
The module housing 10 is used for carrying and protecting the electric core 20, the first flue gas cooling pipeline 30, the first particle adsorption device 40 and the first flue gas collecting pipeline 50. The module case 10 may be a rectangular case, a cylindrical case, etc., without limitation thereto.
Generally, the battery cell 20 is provided with a plurality of battery cells, and the arrangement manner of the battery cells 20 in the module housing 10 is not limited in the embodiment of the present application, for example, the battery cells 20 are arranged at intervals along the length direction of the rectangular mold housing. Every electricity core 20 all is provided with relief valve 21, and relief valve 21 can open and close according to the pressure automatic start-stop in electric core 20, and when taking place thermal runaway and producing the flue gas in electric core 20 and lead to pressure increase, relief valve 21 opens under the effect of flue gas pressure. The pressure release valve 21 can be a spring-type pressure release valve, and the pressure release valve 21 can also be a lever-type pressure release valve, and the embodiment of the application does not limit the specific structure of the pressure release valve 21.
First flue gas collecting pipe 50 corresponds the setting with electric core 20, first flue gas collecting pipe 50 is the same with electric core 20's quantity, first flue gas collecting pipe 50 of the equal sealing connection of relief valve 21 of every electric core 20, all first flue gas collecting pipe 50's the other end all with first flue gas cooling pipe 30 sealing connection, and first flue gas collecting pipe 50 stretches out to the outside of module casing 10, so, when taking place the thermal runaway in electric core 20 and producing a large amount of flue gases, relief valve 21 opens under the pressure effect, high temperature flue gas and solid particle get into first flue gas cooling pipe 30 via first flue gas collecting pipe 50, and discharge to the outside of module casing 10 via first flue gas cooling pipe 30.
Wherein, the relief valve 21 can be threaded connection with first flue gas collecting pipeline 50, perhaps relief valve 21 and first flue gas collecting pipeline 50 pass through flange joint to be provided with the sealing washer between relief valve 21 and first flue gas collecting pipeline 50, realize relief valve 21 and first flue gas collecting pipeline 50's sealing connection.
First flue gas collecting pipe 50 and first flue gas cooling pipe 30 can threaded connection, joint, flange joint wind, still are provided with the sealing washer between first flue gas collecting pipe 50 and the first flue gas cooling pipe 30 and realize sealed, avoid revealing such as high temperature flue gas, solid particle.
The first flue gas collecting pipeline 50 enables solid particles, high-temperature flue gas and the like generated by thermal runaway of the battery cell 20 to independently enter the first flue gas cooling pipeline 30, and the solid particles, the high-temperature flue gas and the like are not erupted to the surrounding battery cells 20 to cause potential fire risks. The first flue gas collection duct 50 may be a circular duct, a rectangular duct, a corrugated tube, etc.
With reference to fig. 1, in some implementations, the first flue gas collecting pipe 50 includes a collecting pipe section 51 and a connecting pipe section 52, a first end of the collecting pipe section 51 is connected to the pressure relief valve 21 in a sealing manner, a second end of the collecting pipe section 51 is connected to a first end of the connecting pipe section 52, a second end of the connecting pipe section 52 is connected to the first flue gas cooling pipe 30 in a sealing manner, the collecting pipe section 51 is communicated with the connecting pipe section 52, and the collecting pipe section 51 and the connecting pipe section 52 are an integrally formed integral piece. The cross-sectional area of the gathering pipe segment 51 tapers from its first end to its second end. That is, the cross-sectional area of the first end of the collecting pipe section 51 is relatively large, so that a large amount of high-temperature flue gas, solid particles and the like sprayed from the pressure release valve 21 can rapidly enter the first flue gas collecting pipe 50; the cross-sectional area of the second end of the collecting pipe section 51 is relatively small, so that the high-temperature flue gas, solid particles and the like can be rapidly fed into the first flue gas cooling pipeline 30.
Optionally, the collecting pipe section 51 is a tapered pipe section with a larger diameter at a first end and a smaller diameter at a second end; the connecting pipe section 52 is a circular pipe section, and the diameter of the connecting pipe section is the same as that of the second end of the collecting pipe section 51, so that the processing is convenient, and high-temperature flue gas, solid particles and the like can smoothly enter the connecting pipe section 52 through the collecting pipe section 51.
In addition, in order to prevent the backflow of substances such as high-temperature flue gas in the first flue gas cooling pipeline 30 from entering the first flue gas collecting pipeline 50, a plurality of check valves 31 are arranged on the first flue gas cooling pipeline 30 in the embodiment of the present application, and the number of the check valves 31 is consistent with that of the first flue gas collecting pipeline 50. The second end of the connecting pipe section 52 of the first flue gas collecting pipe 50 is communicated with the one-way valve 31, so that flue gas in the connecting pipe section 52 enters the first flue gas cooling pipe 30 through the one-way valve 31, and substances such as high-temperature flue gas in the first flue gas cooling pipe 30 cannot flow back to the first flue gas collecting pipe 50, thereby playing a role in protecting other cells 20. The check valve 31 may be an existing check valve 31 structure, and the specific structure of the check valve 31 is not limited in the embodiment of the present application. The one-way valve 31 and the first flue gas cooling pipeline 30 can be in threaded connection, and the one-way valve 31 and the first flue gas cooling pipeline 30 are connected through a flange; the check valve 31 and the connecting pipe section 52 can be connected by screw thread, flange, snap connection, etc. It will be appreciated that, in order to avoid leakage of flue gas and the like, the one-way valve 31 is sealingly connected to the first flue gas cooling duct 30 and the connecting pipe section 52, respectively.
Continuing to refer to fig. 1, in this embodiment of the application, the first flue gas cooling pipeline 30 is a straight pipe, the plurality of battery cores 20 are arranged at intervals along the length direction of the first flue gas cooling pipeline 30, a pressure release valve 21 is arranged on one side of the battery core 20 facing the first flue gas cooling pipeline 30, each pressure release valve 21 is directly opposite to one of the check valves 31 on the first flue gas cooling pipeline 30, so that the distance of the first flue gas collecting pipeline 50 is relatively short, and the rapid entering of substances such as high-temperature flue gas and solid particles into the first flue gas cooling pipeline 30 is facilitated.
In the embodiment of the present application, the first flue gas cooling pipeline 30 can play a role of reducing the temperature of the flue gas, and can collect the high temperature flue gas discharged from the first flue gas collecting pipeline 50, solid particles and the like to the outside of the module housing 10.
In one possible implementation manner, the first flue gas cooling duct 30 includes a duct body 32 and a first flame retardant coating 33 disposed on an inner wall surface of the duct body 32, and the first flue gas collecting duct 50 is hermetically connected to the duct body 32. Wherein the cross-section of the pipe body 32 may be circular, rectangular, oval, etc. The first flame retardant coating 33 is disposed on each of the inner wall surfaces of the duct body 32, and the first flame retardant coating 33 disposed on the inner wall surface of the duct body 32 includes at least one of a phosphorus flame retardant coating, a bromine flame retardant coating, a nitrogen flame retardant coating, and an inorganic flame retardant coating, for example, the first flame retardant coating 33 may be a phosphorus flame retardant coating, and the first flame retardant coating 33 may include a bromine flame retardant coating and a nitrogen flame retardant coating.
The first flame retardant coating 33 has the effects of cooling and retarding flame for high-temperature flue gas and solid particles ejected from the battery cell 20 through physical or chemical reaction, such as the gasification of the flame retardant of the first flame retardant coating 33, so that the fire risk is reduced. In addition, first flue gas cooling pipeline 30 separates combustible flue gas and electric core 20, reduces the harm that combustible flue gas is on fire and causes electric core 20. The mixed gas of the gasified flame retardant and the flue gas can effectively reduce the oxygen concentration in the first flue gas cooling pipeline 30, and can also reduce the fire risk.
Of course, the first flue gas cooling pipeline 30 may further include a cooling structure disposed outside the pipeline body 32, for example, a cooling device is installed on the first flue gas cooling pipeline 30, and when the pressure in the first flue gas cooling pipeline 30 exceeds a preset value, the cooling device is turned on to spray the fire extinguishing medium into the first flue gas cooling pipeline 30.
With continued reference to fig. 1, the first particle adsorbing device 40 of the embodiment of the present application is fixedly connected to the first flue gas cooling duct 30, for example, clamped, screwed, and the like. The first particle adsorbing means 40 is provided with a first adsorption surface located in the path of the flue gas in the first flue gas cooling duct 30 for adsorbing solid particles. Thus, the solid particles sprayed out of the battery cell 20 after thermal runaway can be adsorbed and collected by the first adsorption surface, so as to be separated from the high-temperature flue gas.
The solid particles ejected out of the electrical core 20 due to thermal runaway are mostly positive and negative electrode active material materials of the battery in a high temperature state or current collector materials in a molten state, and after being mixed with high temperature flue gas, the possibility of igniting the high temperature flue gas exists. Therefore, the first particle adsorption device 40 is arranged on the first flue gas cooling pipeline 30, and the first adsorption surface of the first particle adsorption device is located in the flue gas path, so that high-temperature solid particles can be adsorbed.
Optionally, the first adsorption surface is provided with a second flame retardant coating, so that the first particle adsorption device 40 plays a role in reducing the temperature of the solid particles while collecting the high-temperature fixed particles. The second flame retardant coating layer comprises at least one of a phosphorus flame retardant coating layer, a bromine flame retardant coating layer, a nitrogen flame retardant coating layer and an inorganic flame retardant coating layer, for example, the second flame retardant coating layer can be a phosphorus flame retardant coating layer, and the second flame retardant coating layer can comprise a bromine flame retardant coating layer and a nitrogen flame retardant coating layer.
Optionally, the first particle adsorbing device 40 is at least one of a filter screen, an electrostatic adsorbing device and a viscous adsorbing device arranged on the first flue gas cooling pipeline 30. For example, the first particle adsorbing device 40 is a filter screen disposed on the first flue gas cooling pipeline 30, and when the mixture of the high-temperature flue gas and the solid particles passes through the filter screen, the solid particles are adsorbed on the filter screen and separated from the high-temperature flue gas.
With reference to fig. 1, the first particle adsorbing devices 40 are provided in a plurality, and the first particle adsorbing devices 40 are arranged at intervals along the length direction of the first flue gas cooling pipeline 30, so as to increase the area of solid particle adsorption, thereby improving the effect of separating flue gas from solid particles. Illustratively, five first particle adsorption devices 40 are arranged at regular intervals along the length direction of the first flue gas cooling duct 30. Optionally, the number of the first particle adsorption devices 40 corresponds to the number of the battery cells 20.
In one arrangement of the first particle adsorbing device 40, a plurality of battery cells 20 are arranged at intervals along the length direction of the first flue gas cooling duct 30 to form a battery unit, for example, five battery cells 20 are arranged at regular intervals along the length direction of the first flue gas cooling duct 30 to form one battery unit as shown in fig. 1. Two ends of the battery unit are respectively provided with a first particle adsorption device 40, and a first particle adsorption device 40 is arranged between every two adjacent battery cores 20. With the arrangement, substances generated by thermal runaway in any one of the battery cells 20, no matter the substances are discharged from the left end or the right end of the first flue gas cooling channel, can pass through the at least one first particle adsorption device 40, so that high-temperature flue gas and solid particles are separated, and the risk of re-ignition or even explosion is reduced.
Therefore, the battery module 200 provided by the embodiment of the present application includes: the module comprises a module shell 10, a first flue gas cooling pipeline 30, a first particle adsorption device 40, a plurality of battery cells 20 and a plurality of first flue gas collecting pipelines 50, wherein the first particle adsorption device 40, the plurality of battery cells 20, the plurality of first flue gas collecting pipelines 50 and at least part of the first flue gas cooling pipeline 30 are arranged in the module shell 10; each battery cell 20 is provided with a pressure relief valve 21; the first flue gas collecting pipeline 50 is arranged corresponding to the battery cell 20, and two ends of the first flue gas collecting pipeline 50 are respectively connected with the first flue gas cooling pipeline 30 and the pressure release valve 21 in a sealing manner; the first flue gas collecting pipe 50 extends to the outside of the module housing 10; first granule adsorption equipment 40 and first flue gas cooling pipeline 30 fixed connection, first granule adsorption equipment 40 is provided with first adsorption plane, first adsorption plane is arranged in the flue gas route in first flue gas cooling pipeline 30, first adsorption plane is used for adsorbing solid particle, so, high temperature flue gas and the solid particle material that electric core 20 thermal runaway produced spray first flue gas collecting pipe 50 in from relief valve 21, then enter into first flue gas cooling channel and cool down, and solid particle is adsorbed by first adsorption plane of first granule adsorption equipment 40 and is collected and separate with high temperature flue gas, high temperature flue gas discharges the outside of module casing 10 via first flue gas cooling channel, reduce the risk that electric core 20 catches fire, reduce high temperature flue gas, the risk that high temperature solid particle mixture catches fire. The fireproof flame-retardant scheme of the battery module has the advantages of strong applicability, low cost and capability of effectively improving the safety and reliability of the battery.
In combination with the drawings, the embodiment of the present application further provides a battery system, which includes an outer casing 100 and a plurality of battery modules 200, wherein the plurality of battery modules 200 are installed inside the outer casing 100, and the arrangement manner of the battery modules 200 inside the outer casing 100 is not limited in the embodiment of the present application. The structure, function and effect of the battery module 200 provided in this embodiment are the same as those of the above embodiment, and specific reference may be made to the above embodiment, which is not repeated herein.
The battery system provided by the embodiment of the present application also has the same advantages as the battery module 200 of the above embodiment because the battery system includes the battery module 200 of the above embodiment.
With continued reference to fig. 2, the battery system of the embodiment of the present application further includes a second flue gas cooling duct 300, a second particle adsorbing device 400, and a plurality of second flue gas collecting ducts 500; the second flue gas collecting pipeline 500 is arranged corresponding to the battery module 200, and two ends of the second flue gas collecting pipeline 500 are respectively connected with the second flue gas cooling pipeline 300 and the first flue gas cooling pipeline 30 of the battery module 200 in a sealing manner; the second flue gas collecting pipe 500 extends out of the outer shell 100; the second particle adsorption device 400 is fixedly connected with the second flue gas cooling pipeline 300, the second particle adsorption device is provided with a second adsorption surface, the second adsorption surface is located in a flue gas path in the second flue gas cooling pipeline, and the second adsorption surface is used for adsorbing solid particles.
The structure, function and effect of the second flue gas collecting duct 500 are the same as those of the first flue gas collecting duct 50 in the above embodiment, and specific reference may be made to the above embodiment, which is not described herein again.
The structure, function and effect of the second flue gas cooling pipeline 300 are the same as those of the first cooling collecting pipeline in the above embodiments, and the above embodiments may be specifically referred to, and are not repeated herein.
The structure, function and effect of the second particle adsorbing device 400 are the same as those of the first particle adsorbing device 40 in the above embodiments, and specific reference may be made to the above embodiments, which are not repeated herein.
So set up, when taking place thermal runaway and producing a large amount of flue gases in battery module 200, the high temperature flue gas gets into second flue gas cooling pipeline 300 via second flue gas collecting pipe 500, and solid particle is adsorbed by the second adsorption surface of second granule adsorption equipment 400 and is collected and separate with the high temperature flue gas, and the high temperature flue gas is discharged to the outside of shell body 100 via second flue gas cooling passageway, reduces the risk of getting on fire once more, improves the security and the reliability of battery.
This application embodiment is provided with flue gas collecting pipe way, flue gas cooling pipeline and granule adsorption equipment respectively at electric core 20 level and battery system level, provides dual guarantee, does benefit to the security that improves battery system.
Of course, in some possible implementations, the flue gas collection duct, the flue gas cooling duct, and the particle adsorption device are provided only within the battery system level. The fireproof and flame-retardant scheme for the battery is applicable to both the battery cell 20 single level and the battery system level, and is wide in application range.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A battery module, comprising: the device comprises a module shell, a first flue gas cooling pipeline, a first particle adsorption device, a plurality of electric cores and a plurality of first flue gas collecting pipelines; the first particle adsorption device, the plurality of electric cores, the plurality of first smoke collecting pipelines and at least part of first smoke cooling pipelines are arranged in the module shell;
each battery cell is provided with a pressure relief valve;
the first flue gas collecting pipeline is arranged corresponding to the battery cell, and two ends of the first flue gas collecting pipeline are respectively in sealing connection with the first flue gas cooling pipeline and the pressure release valve;
the first flue gas collecting pipeline extends out of the outer side of the module shell;
the first particle adsorption device is fixedly connected with the first flue gas cooling pipeline, a first adsorption surface is arranged on the first particle adsorption device, the first adsorption surface is located in a flue gas path in the first flue gas cooling pipeline, and the first adsorption surface is used for adsorbing solid particles.
2. The battery module according to claim 1, wherein the first flue gas collecting pipe comprises a collecting pipe section and a connecting pipe section, a first end of the collecting pipe section is connected with the pressure release valve in a sealing manner, a second end of the collecting pipe section is connected with a first end of the connecting pipe section, a second end of the connecting pipe section is connected with the first flue gas cooling pipe in a sealing manner, and the cross-sectional area of the collecting pipe section is gradually reduced from the first end to the second end of the collecting pipe section.
3. The battery module according to claim 1, wherein the first flue gas cooling duct comprises a duct body and a first flame retardant coating layer arranged on an inner wall surface of the duct body, and the first flue gas collecting duct is hermetically connected with the duct body.
4. The battery module according to claim 3, wherein the first flame retardant coating layer comprises at least one of a phosphorus-based flame retardant coating layer, a bromine-based flame retardant coating layer, a nitrogen-based flame retardant coating layer, and an inorganic flame retardant coating layer.
5. The battery module according to any one of claims 1-4, wherein the first particle adsorption device is provided in plurality, and the first particle adsorption devices are arranged at intervals along the length direction of the first flue gas cooling pipeline.
6. The battery module according to claim 5, wherein the plurality of battery cells are arranged at intervals along the length direction of the first flue gas cooling pipeline to form a battery unit; the two ends of the battery unit are respectively provided with the first particle adsorption device; and one first particle adsorption device is arranged between every two adjacent electric cores.
7. The battery module according to any one of claims 1 to 4, wherein the first particle adsorption device is at least one of a filter screen, an electrostatic adsorption device and a viscous adsorption device arranged on the first flue gas cooling pipeline.
8. The battery module according to any one of claims 1 to 4, wherein the first adsorption face is provided with a second flame retardant coating.
9. A battery system comprising an outer case and a plurality of battery modules according to any one of claims 1 to 8, the plurality of battery modules being mounted inside the outer case.
10. The battery system of claim 9, further comprising a second flue gas cooling duct, a second particulate adsorption device, and a plurality of second flue gas collection ducts,
the second flue gas collecting pipeline is arranged corresponding to the battery module, and two ends of the second flue gas collecting pipeline are respectively connected with the second flue gas cooling pipeline and the first flue gas cooling pipeline of the battery module in a sealing manner;
the second flue gas collecting pipeline extends out of the outer side of the outer shell;
the second particle adsorption device is fixedly connected with the second flue gas cooling pipeline, the second particle adsorption device is provided with a second adsorption surface, the second adsorption surface is located in a flue gas path in the second flue gas cooling pipeline, and the second adsorption surface is used for adsorbing solid particles.
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| CN202210210029.7A CN114614142A (en) | 2022-03-03 | 2022-03-03 | Battery module and battery system |
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| CN202210210029.7A CN114614142A (en) | 2022-03-03 | 2022-03-03 | Battery module and battery system |
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