CN114744360A - Lithium battery - Google Patents
Lithium battery Download PDFInfo
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- CN114744360A CN114744360A CN202210463675.4A CN202210463675A CN114744360A CN 114744360 A CN114744360 A CN 114744360A CN 202210463675 A CN202210463675 A CN 202210463675A CN 114744360 A CN114744360 A CN 114744360A
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- lithium battery
- pressure relief
- shell
- cooling
- fixing sleeve
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000000110 cooling liquid Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 28
- 239000002826 coolant Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 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 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/65—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
-
- 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
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
-
- 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
- H01M50/383—Flame arresting or ignition-preventing means
-
- 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)
Abstract
The invention discloses a lithium battery, and relates to the technical field of batteries. The lithium battery comprises a shell, an anti-backfire piece and a cooling assembly, wherein an inner cavity is formed in the shell and used for placing an electric core, a pressure relief hole is formed in the shell, a pressure relief valve is arranged at a position corresponding to the pressure relief hole and communicated with the inner cavity, and the pressure relief valve is used for sealing the pressure relief hole; the anti-backfire piece is detachably arranged on the shell to cover the pressure relief hole, and is provided with a plurality of through holes for communicating the pressure relief hole with the outside; the cooling assembly comprises a cooling pipeline arranged on the anti-backfire piece, a driving pipeline arranged on the shell and a connecting piece for connecting the cooling pipeline and the driving pipeline. The invention aims to solve the problem that the lithium battery in the prior art is easy to backfire to cause combustion and explosion when the pressure is released.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a lithium battery.
Background
The lithium battery can generate high-temperature and high-pressure combustible gas in the using process, if the lithium battery cannot be discharged in time, explosion and fire can occur to cause serious safety accidents, and the tempering means that the combustible mixed gas is combusted in the cavity due to some reason and spreads and diffuses to the combustible substance at a fast combustion speed to cause the phenomenon of combustion and explosion at some part of an equipment system.
At present, a battery cover plate manufacturer is provided with an explosion-proof device on a cover plate during design, and the explosion-proof device can be automatically opened to release pressure under the condition of overlarge internal pressure of a battery core so as to prevent the explosion phenomenon. The explosion-proof device opens automatically, but this approach is prone to the following safety issues: 1. because hydrogen and oxygen are mixed, explosion and fire are easily generated; 2. if electrical ignition occurs inside, the ignition and detonation will occur, thermal runaway will be generated, eruption is continuously formed from the pressure relief port, and internal chemical reaction is continuously intensified.
Disclosure of Invention
The invention mainly aims to provide a lithium battery, aiming at solving the problems of easy backfire to cause combustion and explosion when the lithium battery is decompressed in the prior art.
In order to achieve the above object, the present invention provides a lithium battery, including:
the battery comprises a shell, wherein an inner cavity is formed in the shell and used for placing an electric core, a pressure relief hole is formed in the shell, a pressure relief valve is arranged at a position corresponding to the pressure relief hole, the pressure relief hole is communicated with the inner cavity, and the pressure relief valve is used for sealing the pressure relief hole;
the anti-backfire piece is detachably arranged on the shell to cover the pressure relief hole, and is provided with a plurality of through holes for communicating the pressure relief hole with the outside; and the number of the first and second groups,
the cooling assembly comprises a cooling pipeline arranged on the anti-backfire piece, a driving pipeline arranged on the shell and a connecting piece for connecting the cooling pipeline and the driving pipeline;
when the anti-backfire piece is installed on the shell, the connecting piece is communicated with the driving pipeline and the cooling pipeline to form a cooling circulation loop.
Optionally, the anti-backfire element comprises a cover body, the cover body comprises a cover portion arranged towards the pressure relief hole, and the through holes are correspondingly formed in the cover portion;
the cooling circuit includes:
the annular cylinders are arranged corresponding to the through holes in number and are arranged in the corresponding through holes, each annular cylinder is hollow so as to form a containing cavity in the annular cylinder, and a flow guide pipe is arranged between every two adjacent annular cylinders and is used for communicating the containing cavities of the two adjacent annular cylinders; and (c) a second step of,
one end of each of the two first connecting pipe sections is communicated with any one of the cylinders.
Optionally, the drive line comprises:
the cooling liquid box is used for containing cooling liquid, and an inlet and an outlet are formed in the cooling liquid box;
the circulating water pump comprises a liquid inlet end and a liquid outlet end, and the liquid inlet end of the circulating water pump is communicated with the outlet of the cooling liquid tank; and the number of the first and second groups,
and one end of one second connecting pipe section is connected with the inlet of the cooling liquid tank, and one end of the other second connecting pipe section is connected with the liquid outlet end of the circulating water pump.
Optionally, the connector comprises:
the two first fixing sleeves are respectively fixedly sleeved at the other ends of the two first connecting pipe sections, threaded sleeves are rotatably arranged on the periphery of each first fixing sleeve, at least part of each threaded sleeve protrudes out of the corresponding first fixing sleeve, and internal threads are formed in the inner walls of the threaded sleeves; and the number of the first and second groups,
and the two second fixing sleeves are respectively fixedly sleeved at the other ends of the two second connecting pipe sections, and the peripheral sides of the second fixing sleeves are provided with external threads so as to be in threaded connection with the corresponding thread sleeves.
Optionally, a cylinder cavity of each first fixing sleeve is arranged in a reducing manner along a direction away from the corresponding first connecting pipe section, a first stop block is installed in the cylinder cavity of the first fixing sleeve and used for blocking the cylinder cavity of the first fixing sleeve, the first stop block is arranged in a reducing manner along a direction away from the corresponding first connecting pipe section, a first elastic piece is installed between one end, close to the first fixing sleeve, of the first stop block and the first fixing sleeve, and an ejector rod is installed at the other end, away from the first fixing sleeve, of the first stop block;
each fixed telescopic section of thick bamboo chamber of second is along keeping away from the corresponding second and connecting the direction of pipeline section and being the setting that reduces, install the second dog in the fixed telescopic section of thick bamboo chamber of second, the second dog is used for the shutoff the fixed telescopic section of thick bamboo chamber of second, the second dog is along keeping away from the corresponding second and connecting the direction of pipeline section and being the setting that reduces, the second dog is close to the fixed telescopic one end of second with install the second elastic component between the fixed sleeve of second.
Optionally, a protective sleeve is screwed to the outer periphery of each of the second fixing sleeves.
Optionally, the drive line further comprises:
the control module is arranged on the shell and used for electrically connecting the circulating water pump and the anode and the cathode of the lithium battery; and the number of the first and second groups,
the flow detection unit is installed on the cover body and electrically connected with the control module.
Optionally, the cooling assembly further comprises a heat exchange device, the heat exchange device comprising:
the radiating pipe is arranged on the shell and is communicated with the second connecting pipe section and the cooling liquid tank, the radiating pipe is continuously bent to form a plurality of straight pipe sections which are arranged at intervals, and a heat exchange space is formed by enclosing two adjacent straight pipe sections; and (c) a second step of,
and the fins are respectively arranged in the heat exchange spaces, and are abutted against two adjacent straight pipe sections for heat exchange with the radiating pipe.
Optionally, a plurality of rotating shafts are further rotatably mounted on the radiating pipe, each rotating shaft penetrates through the inner side and the outer side of the radiating pipe, an impeller is mounted at one end, located on the inner side of the radiating pipe, of each rotating shaft, and a fan blade is mounted at one end, located on the outer side of the radiating pipe, of each rotating shaft.
Optionally, two accommodating grooves are formed on the periphery of the cover body, and the two accommodating grooves are used for accommodating the first connecting pipe section respectively;
the week side of lid still is equipped with the lantern ring, run through on the lantern ring and seted up two openings, the lantern ring has first state and second state on its rotation formation, works as the lantern ring is located during the first state, lantern ring shutoff two the notch of storage tank works as the lantern ring is located during the second state, two the opening communicates two respectively the storage tank.
According to the technical scheme, after the gas pressure in the inner cavity is higher than a preset value, the pressure release valve can be automatically opened to discharge combustible gas (hydrogen, carbon monoxide and the like), the combustible gas passes through the pressure release hole to the anti-backfire piece and is discharged to the outside from the through holes, and after the pressure in the inner cavity is reduced, the pressure release valve can be closed; the anti-backfire member is made of fireproof and high-temperature-resistant materials, backfire can occur only when the ejecting speed of combustible gas is smaller than the burning speed, when the combustible gas is burnt and is backfired to the through hole, due to the physical characteristics of the anti-backfire member, the high temperature generated by burning can not instantly heat the anti-backfire member, the combustible gas reaching the anti-backfire member can not reach the burning point and can be automatically extinguished, flame retardance is realized, and the hidden troubles of explosion and internal fire spread caused by the fact that the combustible gas is backfire and directly burned to the inner cavity are eliminated; meanwhile, the chain reaction caused by short circuit due to the fact that liquid water or other pollutants are generated after electrical elements and an energy storage system in the inner cavity are burnt by combustible gas is avoided, and normal operation of electrical connecting pieces in the energy storage system is guaranteed; in addition, because the anti-backfire piece is detachably connected with the shell, when the anti-backfire piece is installed on the shell, the cooling pipeline installed on the anti-backfire piece is connected with the driving pipeline installed on the shell through the connecting piece to form a cooling circulation loop, and when the pressure release valve works, the cooling circulation loop starts to work to continuously cool the plurality of through hole areas on the fireproof piece, so that a double cooling effect is achieved, and the problem that the temperature of the anti-backfire piece is increased after the anti-backfire piece works continuously and the good flame retardant effect cannot be achieved is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic front view of a lithium battery according to an embodiment of the present invention;
FIG. 2 is a front view of the housing of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the housing of FIG. 1;
FIG. 4 is a cross-sectional view of a perspective view of the cover of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the cover of FIG. 1 from another perspective;
FIG. 6 is a schematic cross-sectional view at A in FIG. 1;
fig. 7 is a schematic cross-sectional view of the heat pipe in fig. 1.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The lithium battery can generate high-temperature and high-pressure combustible gas in the using process, if the lithium battery cannot be discharged in time, explosion and fire can happen to cause serious safety accidents, and the tempering means that the combustible mixed gas burns in the cavity due to some reason and spreads and diffuses to the combustible substance at a high burning speed to cause the phenomenon that combustion and explosion happen to some part of an equipment system.
At present, a battery cover plate manufacturer is provided with an explosion-proof device on a cover plate during design, and the explosion-proof device can be automatically opened to release pressure under the condition of overlarge internal pressure of a battery core so as to prevent the explosion phenomenon. The explosion-proof device opens automatically, but this approach is prone to the following safety issues: 1. because hydrogen and oxygen are mixed, explosion and fire are easily generated; 2. if electrical ignition occurs inside, the ignition and detonation will occur, thermal runaway will be generated, eruption is continuously formed from the pressure relief port, and internal chemical reaction is continuously intensified.
In view of the above, the present invention provides a lithium battery, and fig. 1 to 7 illustrate an embodiment of the present invention.
Referring to fig. 1 to 3, the lithium battery 100 includes a casing 1, an anti-backfire member 4 and a cooling assembly 6, an inner cavity 1a is formed in the casing 1, the inner cavity 1a is used for placing an electric core, a pressure relief hole 2 is formed in the casing 1, a pressure relief valve 3 is installed at a position corresponding to the pressure relief hole 2, the pressure relief hole 2 is communicated with the inner cavity 1a, and the pressure relief valve 3 is used for sealing the pressure relief hole 2; the anti-backfire piece 4 is detachably mounted on the shell 1 to cover the pressure relief hole 2, a plurality of through holes 5 are formed in the anti-backfire piece 4, and the through holes 5 are used for communicating the pressure relief hole 2 with the outside; the cooling assembly 6 comprises a cooling pipeline 61 mounted on the anti-backfire element 4, a driving pipeline 62 mounted on the shell 1 and a connecting piece 63 for connecting the cooling pipeline 61 and the driving pipeline 62; wherein, when the anti-backfire element 4 is mounted on the housing 1, the connecting element 63 connects the driving pipeline 62 and the cooling pipeline 61 to form a cooling circulation loop.
In the technical scheme of the invention, after the gas pressure in the inner cavity 1a is higher than a preset value, the pressure release valve 3 can be automatically opened to discharge combustible gas (hydrogen, carbon monoxide and the like), the combustible gas passes through the pressure release hole 2 to the anti-backfire piece 4 and is discharged to the outside from the through holes 5, and after the pressure in the inner cavity 1a is reduced, the pressure release valve 3 can be closed; the anti-backfire member 4 is made of fireproof and high-temperature-resistant materials, backfire can occur only when the ejection speed of the combustible gas is smaller than the burning speed, when the combustible gas is burnt and is backfired to the through hole 5, due to the physical characteristics of the anti-backfire member 4, the high temperature generated by burning cannot instantly heat the anti-backfire member 4, the combustible gas reaching the anti-backfire member 4 cannot reach a burning point and is automatically extinguished, flame retardance is realized, and the hidden danger that the combustible gas is backfired and directly burned to the inner cavity 1a to cause explosion and internal fire spread is eliminated; meanwhile, the chain reaction caused by short circuit due to the fact that liquid water or other pollutants are generated after electrical elements and an energy storage system in the inner cavity 1a are burnt by combustible gas is avoided, and the normal operation of an electrical connecting piece 63 in the energy storage system is guaranteed; in addition, because the anti-backfire element 4 is detachably connected with the housing 1, when the anti-backfire element 4 is mounted on the housing 1, the cooling pipeline 61 mounted on the anti-backfire element 4 is connected with the driving pipeline 62 mounted on the housing 1 through the connecting piece 63 to form a cooling circulation loop, and when the pressure relief valve 3 works, the cooling circulation loop starts to work to continuously cool down the areas of the through holes 5 on the fire-proof element, so that a double cooling effect is achieved, and the problem that the temperature of the anti-backfire element 4 rises after continuous work and cannot achieve a good flame retardant effect is avoided.
Specifically, the anti-backfire element 4 can be made of a metal material, and the metal material has good physical properties of heat conduction and high temperature resistance, can quickly absorb heat, realizes flame retardance, can effectively block backfire, and is convenient to process; the anti-backfire element 4 can be made of steel, copper alloy and other materials.
Furthermore, the diameters of the through holes 5 are all between 0.8mm and 3mm, and when the diameter of each through hole 5 is smaller than 0.8mm, the through holes are difficult to machine, the machining cost is high, and the pressure relief efficiency is influenced; when the diameter of the through hole 5 is larger than 3mm, the through hole 5 is too large, and the flame retardant effect of the anti-backfire piece 4 is poor; specifically, the diameter of the through-hole 5 is 1.9mm in the present embodiment.
Still further, the depth of the through hole 5 is not less than 5 mm. The deeper the depth of the through hole 5 is, the longer the time that the combustion gas passes through the through hole 5 is, the more the combustible gas can be effectively absorbed around the beam, and flame retardance is realized.
Referring to fig. 1, 4 and 5, the anti-backfire element 4 comprises a cover 401, the cover 401 includes a cover portion 401a disposed toward the pressure relief hole 2, and a plurality of through holes 5 are correspondingly formed in the cover portion 401 a; the cooling pipeline 61 comprises a plurality of annular cylinders 61a and two first connecting pipe sections 61c, the plurality of annular cylinders 61a are arranged corresponding to the number of the through holes 5 and are installed in the corresponding through holes 5, each annular cylinder 61a is arranged in a hollow manner so as to form a containing cavity inside, a flow guide pipe 61b is installed between every two adjacent annular cylinders 61a, and the flow guide pipe 61b is used for communicating the containing cavities of the two adjacent annular cylinders 61 a; one end of each of the two first connecting pipe sections 61c is communicated with any one of the cylinders. When the annular cylinder 61a is installed in the through hole 5, a through hole is formed in the inner side of the annular cylinder, so that the combustible gas can pass through the through hole, when the pressure release valve 3 works, the first connecting pipe section 61c can be filled with cooling liquid, so that the cooling liquid passes through the flow guide pipes 61b and the annular cylinder 61a and is discharged from the other first connecting pipe section 61c, the area of the through hole 5 of the annular cylinder 61a can be cooled continuously, and the situation that the combustible gas is close to the cover body 401 due to the fact that the spraying speed of the combustible gas is gradually reduced due to the fact that the pressure in the inner cavity 1a is gradually reduced when the combustible gas is continuously combusted is avoided.
The annular cylinders 61a are connected in series through the plurality of flow guide pipes 61b, so that the situation that part of the annular cylinders 61a do not circulate the cooling liquid when the cooling liquid is introduced into the annular cylinders 61a is avoided.
It can be understood that when the annular cylinder 61a is mounted to the corresponding through hole 5, the inner diameter of the through hole is between 0.8mm and 3mm, and the height thereof is not less than 5 mm.
Furthermore, the through holes 5 are uniformly distributed on the anti-backfire piece 4 at intervals, so that the gas concentration of each area is the same when the combustible gas is discharged to the outside, the flow rate is consistent when the combustible gas is discharged, and the explosion risk is not easily increased due to the overhigh concentration of the area.
In addition, the detachable connection between the cover 401 and the housing 1 is not limited, and may be a snap connection or a screw connection; specifically, in the present embodiment, the cover 401 is connected to the housing 1 by screwing.
Referring to fig. 1 and fig. 2, the driving pipeline 62 includes a cooling liquid tank 62a, a circulating water pump 62b, and two second connecting pipe sections 62c, the cooling liquid tank 62a is used for accommodating cooling liquid, and the cooling liquid tank 62a is provided with an inlet and an outlet; the circulating water pump 62b comprises a liquid inlet end and a liquid outlet end, and the liquid inlet end of the circulating water pump 62b is communicated with the outlet of the cooling liquid tank 62 a; one end of one second connecting pipe section 62c is connected with the inlet of the cooling liquid tank 62a, and one end of the other second connecting pipe section 62c is connected with the liquid outlet end of the circulating water pump 62 b. The cold coolant tank 62a and the circulating water pump 62b are both mounted on the housing 1, and the two second connecting pipe sections 62c are respectively connected to the two first connecting pipe sections 61c, so that a cooling circulation loop is formed among the coolant tank 62a, the circulating water pump 62b, the two first connecting pipe sections 61c, the two second connecting pipe sections 62c, the plurality of annular cylinders 61a, and the plurality of flow guide pipes 61b, and thus the cooling circulation loop is used for continuously supplying coolant to the cavities of the plurality of annular cylinders 61a to cool the cavities.
Referring to fig. 1 and 6, the connecting member 63 includes two first fixing sleeves 63a and two second fixing sleeves 63c, the two first fixing sleeves 63a are respectively fixedly sleeved at the other ends of the two first connecting pipe sections 61c, a threaded sleeve 63b is rotatably installed on the periphery of each first fixing sleeve 63a, at least a portion of each threaded sleeve 63b protrudes out of the corresponding first fixing sleeve 63a, and an inner wall of the threaded sleeve 63b is provided with an internal thread; the two second fixing sleeves 63c are respectively fixedly sleeved at the other ends of the two second connecting pipe sections 62c, and external threads are formed on the peripheral sides of the second fixing sleeves 63c and are in threaded connection with the corresponding threaded sleeves 63 b. When the screw sleeve 63b is rotatably mounted on the first fixing sleeve 63a, a part of the screw sleeve 63b protrudes out of the first fixing sleeve 63a, and an internal thread is formed on the inner side of the protruding position, so that when the first fixing sleeve 63a and the second fixing sleeve 63c are connected, the screw sleeve 63b and the second fixing sleeve 63c can be connected by rotating the screw sleeve 63b, and the second fixing sleeve 63c is close to the first fixing sleeve 63a until the two fixing sleeves abut against each other, so that the effect of firm connection is achieved.
Furthermore, the tube cavity of each first fixing sleeve 63a is tapered along a direction away from the corresponding first connecting tube section 61c, a first stop 7 is installed in the tube cavity of the first fixing sleeve 63a, the first stop 7 is used for blocking the tube cavity of the first fixing sleeve 63a, the first stop 7 is tapered along a direction away from the corresponding first connecting tube section 61c, a first elastic part 8 is installed between one end of the first stop 7 close to the first fixing sleeve 63a and the first fixing sleeve 63a, and an ejector rod 9 is installed at the other end of the first stop 7 away from the first fixing sleeve 63 a; the tube cavity of each second fixing sleeve 63c is tapered along a direction away from the corresponding second connecting tube section 62c, a second stopper 10 is installed in the tube cavity of the second fixing sleeve 63c, the second stopper 10 is used for plugging the tube cavity of the second fixing sleeve 63c, the second stopper 10 is tapered along a direction away from the corresponding second connecting tube section 62c, and a second elastic part 11 is installed between one end of the second stopper 10 close to the second fixing sleeve 63c and the second fixing sleeve 63 c.
When the first fixing sleeve 63a and the second fixing sleeve 63c are not installed, the first elastic member 8 and the second elastic member 11 respectively act on the first stopper 7 and the second stopper 10, and since the cylinder cavities of the first fixing sleeve 63a and the second fixing sleeve 63c are both tapered and the first stopper 7 and the second stopper 10 are both tapered, the first elastic member 8 and the second elastic member 11 respectively push the peripheries of the first stopper 7 and the second stopper 10 to abut against the cylinder walls of the first fixing sleeve 63a and the second fixing sleeve 63c, so as to seal the first connecting pipe section 61c and the second connecting pipe section 62c, and when the first fixing sleeve 63a and the second fixing sleeve 63c are installed, as the first fixing sleeve 63a and the second fixing sleeve 63c approach each other, the ejector rod 9 mounted on the first stopper 7 abuts against the second stopper 10, so that the first elastic member 8 and the second elastic member 11 are both contracted, the peripheries of the first stopper 7 and the second stopper 10 are separated from the cylinder walls of the first fixing sleeve 63a and the second fixing sleeve 63c, the corresponding first connecting pipe section 61c and the second connecting pipe section 62c are communicated, and the effect of automatically communicating the pipe cavities of the first connecting pipe section 61c and the second connecting pipe section 62c during mounting is achieved.
When the first connecting pipe section 61c and the second connecting pipe section 62c are separated, and the second fixing sleeve 63c is not separated from the threaded sleeve 63b, the push rod 9 is separated from the second stop block 10, and under the action of the first elastic member 8 and the second elastic member 11, the first stop block 7 and the second stop block 10 block the corresponding first fixing sleeve 63a and the second fixing sleeve 63c again, so as to avoid the situation that part of the cooling liquid leaks when the first connecting pipe section 61c is separated from the second connecting pipe section 62 c.
The arrangement form of the first elastic element 8 and the second elastic element 11 is not limited, and the first elastic element and the second elastic element may be a spring, an elastic gasket, or the like; specifically, in the present embodiment, the first elastic member 8 and the second elastic member 11 are each provided as a spring.
Referring to fig. 2, a protective sleeve 12 is screwed to the outer periphery of each of the second fixing sleeves 63 c. Because the outer periphery of the second fixing sleeve 63c is provided with the external thread, that is, when the second fixing sleeve 63c is not connected with the first fixing sleeve 63a, the protective sleeve 12 can be screwed on the outer periphery thereof to protect the pipe internal environment of the second connecting pipe section 62c, so that the situation that the cooling liquid flows slowly or does not flow due to the blockage of foreign matters when the foreign matters enter the pipe internal environment of the second connecting pipe section 62c to cause the pipe internal environment of the cooling circulation loop to work is avoided.
Referring to fig. 2 and 4, the driving pipeline 62 further includes a control module 62d and a flow detection unit 62e, the control module 62d is installed on the housing 1, and the control module 62d is used to electrically connect the circulating water pump 62b and the positive and negative electrodes of the lithium battery 100; the flow detection unit 62e is installed on the cover 401, and the flow detection unit 62e is electrically connected to the control module 62 d. Through being provided with control module 62d with flow detection unit 62e when the pressure release valve 3 lets out the pressure, flow detection unit 62e can detect there is the air current to pass through to through control module 62d control lithium cell 100 intercommunication circulating water pump 62b, for circulating water pump 62b provides power input, thereby drive circulating water pump 62b work makes cooling circulation loop begin work, in order to reach automatically open when the pressure release valve 3 lets out the pressure the function of circulating water pump 62b, response speed is fast.
Referring to fig. 1 and 2, the cooling module 6 further includes a heat exchanging device 64, the heat exchanging device 64 includes a heat dissipating pipe 64a and a plurality of fins 64b, the heat dissipating pipe 64a is mounted on the housing 1, the heat dissipating pipe 64a communicates with one of the second connecting pipe sections 62c and the coolant tank 62a, the heat dissipating pipe 64a is continuously bent to form a plurality of straight pipe sections arranged at intervals, and a heat exchanging space is defined between two adjacent straight pipe sections; the plurality of fins 64b are respectively disposed in the plurality of heat exchanging spaces, and each of the fins 64b abuts against two adjacent straight tube sections for heat exchange with the heat radiating tube 64 a. Preferably, the heat dissipation pipe 64a is disposed between the second connection pipe section 62c communicated with the inlet of the coolant tank 62a and the coolant tank 62a, so that heat can be discharged to the external environment when the coolant absorbing heat does not enter the coolant tank 62a, the flat pipe is continuously bent to form a plurality of straight pipe sections arranged in an array, and the fins 64b are installed before two adjacent straight pipe sections for heat exchange, so as to improve the heat dissipation rate of the coolant.
Referring to fig. 1 and 7, a plurality of rotating shafts 13 are rotatably mounted on the heat dissipating pipe 64a, each rotating shaft 13 penetrates through the inner side and the outer side of the heat dissipating pipe 64a, an impeller 14 is mounted at one end of each rotating shaft 13 located inside the heat dissipating pipe 64a, and a fan 15 is mounted at one end of each rotating shaft 13 located outside the heat dissipating pipe 64 a. Because the impeller 14 is not located in the middle cavity position of the heat dissipation tube 64a, and as shown in the figure, the heat dissipation tube 64a is rectangular, when the cooling liquid circulates, the cooling liquid can push the impeller 14 to rotate, so as to drive the rotating shaft 13 to rotate, and further drive the fan blades 15 to rotate, and because the fan blades 15 are right opposite to the fins 64b, the fins 64b can be rapidly cooled.
It should be noted that, the part of the fin 64b protrudes from the heat dissipation tube 64a, so that part of the fin is not blocked by the heat dissipation tube 64a, the airflow driven by the fan blade 15 can directly act on the protruding part of the fin 64b to dissipate heat, and since the fan blade 15 is easily interfered by the external environment when being arranged outside the housing 1, a protective net is arranged around the periphery of the plurality of fan blades 15 to protect the plurality of fan blades 15.
Referring to fig. 1 and 4, two receiving grooves 16 are formed on the periphery of the cover 401, and the two receiving grooves 16 are respectively used for receiving the first connecting pipe section 61 c; the periphery of lid 401 still overlaps and is equipped with the lantern ring 17, two openings 18 have been seted up in running through on the lantern ring 17, lantern ring 17 has first state and second state on its rotation forms, works as lantern ring 17 is located during the first state, lantern ring 17 shutoff is two the notch of storage tank 16, works as lantern ring 17 is located during the second state, two openings 18 communicate two respectively storage tank 16. When the cover 401 is not mounted to the housing 1, the two first connecting pipe sections 61c may be respectively received in the two receiving grooves 16, and the collar 17 covers the notch positions of the two receiving grooves 16 to protect the two first connecting pipe sections 61c, and when the cover 401 is mounted to the housing 1, the collar 17 may be rotated to enable the two openings 18 of the collar 17 to correspondingly communicate with the two receiving grooves 16, so that the first connecting pipe sections 61c may be taken out of the receiving grooves 16 for mounting.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A lithium battery, comprising:
the battery cell comprises a shell, wherein an inner cavity is formed in the shell and used for placing a battery cell, a pressure relief hole is formed in the shell, a pressure relief valve is arranged at a position corresponding to the pressure relief hole and communicated with the inner cavity, and the pressure relief valve is used for sealing the pressure relief hole;
the anti-backfire piece is detachably arranged on the shell to cover the pressure relief hole, and is provided with a plurality of through holes for communicating the pressure relief hole with the outside; and the number of the first and second groups,
the cooling assembly comprises a cooling pipeline arranged on the anti-backfire element, a driving pipeline arranged on the shell and a connecting piece for connecting the cooling pipeline and the driving pipeline;
when the anti-backfire element is installed on the shell, the connecting element is communicated with the driving pipeline and the cooling pipeline to form a cooling circulation loop.
2. The lithium battery as claimed in claim 1, wherein the anti-backfire member comprises a cover body, the cover body comprises a cover portion disposed toward the pressure relief hole, and a plurality of through holes are correspondingly formed in the cover portion;
the cooling circuit includes:
the annular cylinders are arranged corresponding to the through holes in number and are arranged in the corresponding through holes, each annular cylinder is hollow so as to form a containing cavity in the annular cylinder, and a flow guide pipe is arranged between every two adjacent annular cylinders and is used for communicating the containing cavities of the two adjacent annular cylinders; and (c) a second step of,
one end of each of the two first connecting pipe sections is communicated with any one of the cylinders.
3. The lithium battery of claim 2, wherein the drive line comprises:
the cooling liquid box is used for containing cooling liquid, and an inlet and an outlet are formed in the cooling liquid box;
the circulating water pump comprises a liquid inlet end and a liquid outlet end, and the liquid inlet end of the circulating water pump is communicated with the outlet of the cooling liquid tank; and the number of the first and second groups,
and one end of one second connecting pipe section is connected with the inlet of the cooling liquid tank, and one end of the other second connecting pipe section is connected with the liquid outlet end of the circulating water pump.
4. A lithium battery as claimed in claim 3, characterized in that the connection member comprises:
the two first fixing sleeves are respectively fixedly sleeved at the other ends of the two first connecting pipe sections, threaded sleeves are rotatably arranged on the periphery of each first fixing sleeve, at least part of each threaded sleeve protrudes out of the corresponding first fixing sleeve, and internal threads are formed in the inner walls of the threaded sleeves; and the number of the first and second groups,
and the two second fixing sleeves are respectively fixedly sleeved at the other ends of the two second connecting pipe sections, and the peripheral sides of the second fixing sleeves are provided with external threads so as to be in threaded connection with the corresponding thread sleeves.
5. The lithium battery as claimed in claim 4, wherein the tube cavity of each first fixing sleeve is tapered in a direction away from the corresponding first connecting tube section, a first stopper is mounted in the tube cavity of the first fixing sleeve and used for plugging the tube cavity of the first fixing sleeve, the first stopper is tapered in a direction away from the corresponding first connecting tube section, a first elastic member is mounted between one end of the first stopper close to the first fixing sleeve and the first fixing sleeve, and a push rod is mounted at the other end of the first stopper away from the first fixing sleeve;
each fixed telescopic section of thick bamboo chamber of second is along keeping away from the corresponding second and connecting the direction of pipeline section and being the setting that reduces, install the second dog in the fixed telescopic section of thick bamboo chamber of second, the second dog is used for the shutoff the fixed telescopic section of thick bamboo chamber of second, the second dog is along keeping away from the corresponding second and connecting the direction of pipeline section and being the setting that reduces, the second dog is close to the fixed telescopic one end of second with install the second elastic component between the fixed sleeve of second.
6. A lithium battery as claimed in any one of claims 4 to 5, characterized in that a protective sleeve is screwed to the outer periphery of each of the second fixing sleeves.
7. The lithium battery of claim 3, wherein the drive line further comprises:
the control module is arranged on the shell and used for electrically connecting the circulating water pump and the anode and the cathode of the lithium battery; and the number of the first and second groups,
the flow detection unit is installed on the cover body and electrically connected with the control module.
8. The lithium battery of claim 3, wherein the cooling assembly further comprises a heat exchanging device comprising:
the radiating pipe is arranged on the shell and is communicated with the second connecting pipe section and the cooling liquid tank, the radiating pipe is continuously bent to form a plurality of straight pipe sections which are arranged at intervals, and a heat exchange space is formed by enclosing two adjacent straight pipe sections; and the number of the first and second groups,
and the fins are respectively arranged in the heat exchange spaces, and are abutted against two adjacent straight pipe sections for heat exchange with the radiating pipe.
9. The lithium battery as claimed in claim 8, wherein a plurality of rotation shafts are rotatably mounted on the heat dissipating tube, each rotation shaft is disposed through the inner and outer sides of the heat dissipating tube, an impeller is mounted at one end of each rotation shaft located inside the heat dissipating tube, and a fan blade is mounted at one end of each rotation shaft located outside the heat dissipating tube.
10. The lithium battery as claimed in claim 2, wherein the cover has two receiving slots formed around the periphery thereof, the two receiving slots being respectively configured to receive the first connecting segments;
the week side of lid still is equipped with the lantern ring, run through on the lantern ring and seted up two openings, the lantern ring has first state and second state on its rotation forms, works as the lantern ring is located during the first state, lantern ring shutoff is two the notch of storage tank, works as the lantern ring is located during the second state, two the opening communicates two respectively the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210463675.4A CN114744360B (en) | 2022-04-28 | 2022-04-28 | Lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210463675.4A CN114744360B (en) | 2022-04-28 | 2022-04-28 | Lithium battery |
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| CN114744360A true CN114744360A (en) | 2022-07-12 |
| CN114744360B CN114744360B (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210463675.4A Active CN114744360B (en) | 2022-04-28 | 2022-04-28 | Lithium battery |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498343A (en) * | 2022-09-06 | 2022-12-20 | 无锡市检验检测认证研究院 | A protector, lithium cell and consumer for lithium cell |
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| CN217522084U (en) * | 2022-04-28 | 2022-09-30 | 清安储能技术(重庆)有限公司 | Anti-backfire lithium battery |
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| CN115498343A (en) * | 2022-09-06 | 2022-12-20 | 无锡市检验检测认证研究院 | A protector, lithium cell and consumer for lithium cell |
| CN115498343B (en) * | 2022-09-06 | 2024-06-11 | 无锡市检验检测认证研究院 | Protective device for lithium battery, lithium battery and electric equipment |
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|---|---|
| CN114744360B (en) | 2024-07-05 |
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