CN114374034A - Lithium ion battery pack with flame-retardant and explosion-proof structure - Google Patents

Lithium ion battery pack with flame-retardant and explosion-proof structure Download PDF

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Publication number
CN114374034A
CN114374034A CN202111584312.8A CN202111584312A CN114374034A CN 114374034 A CN114374034 A CN 114374034A CN 202111584312 A CN202111584312 A CN 202111584312A CN 114374034 A CN114374034 A CN 114374034A
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China
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lithium ion
retardant
air bag
flame
ion battery
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CN202111584312.8A
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Chinese (zh)
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程秀峰
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Individual
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Individual
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Priority to CN202111584312.8A priority Critical patent/CN114374034A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a lithium ion battery pack with a flame-retardant and explosion-proof structure, which comprises a battery shell and lithium ion battery bodies, wherein a plurality of groups of lithium ion battery bodies are arranged in the battery shell; further comprising: the metal plate is arranged in the battery shell, a cavity formed by the middle part of the upper end of the metal plate and the lower end of the adjusting plate is filled with flame-retardant sand, and the adjusting plate is arranged in the battery shell; the transmission port is arranged on the metal plate, and a blocking plate is arranged inside the transmission port; the traction rope is used for connecting the adjusting plate and the central rod, a torsion spring for providing reset elasticity is arranged on the outer side of the central rod, and a cam is arranged on the central rod. This lithium ion battery group with fire-retardant explosion-proof construction can put out the goods source of inside in time at the in-process convenience that uses, can be simultaneously in time outwards discharge its casing inside oxygen when catching fire, improves holistic fire extinguishing efficiency.

Description

Lithium ion battery pack with flame-retardant and explosion-proof structure
Technical Field
The invention relates to the technical field of lithium ion battery packs, in particular to a lithium ion battery pack with a flame-retardant and explosion-proof structure.
Background
The lithium ion battery is a secondary battery capable of being recycled, the lithium ion battery mainly depends on lithium ions moving between a positive electrode and a negative electrode to work in the using process, and the lithium ion battery pack is often used as a main driving energy source along with the development of new energy sources.
However, the existing lithium ion battery pack has the following problems:
for example, the shell structure with publication number CN112635890A, which is based on a lithium battery and reduces the combustion probability, includes a shell, a sealing plate is installed at the lower part of the shell, and eight groups of partition plates are fixedly installed at the upper part of the sealing plate, so that through fire-retardant sand, when seven groups of lithium batteries are ignited by short circuit, the temperature of the outer flame of the open fire is too high, the plastic isolation cloth is baked, the fire-retardant sand falls through a filter plate, covers the seven groups of lithium batteries, so that the open fire isolates oxygen, and the combustion cannot be continued, when the lithium batteries are ignited, the fire source is extinguished by the fire-retardant sand arranged inside the lithium batteries, and meanwhile, the rubber sealing pipe is used to prevent external air from entering the shell, so that although a certain flame-retardant effect can be achieved when the lithium batteries are ignited, it is not convenient to discharge the oxygen existing inside the lithium battery shell outwards when the lithium batteries are ignited, thereby causing the oxygen originally existing inside the shell to achieve a certain combustion-supporting effect, and then the whole flame retardant efficiency is greatly reduced.
We have therefore proposed a lithium ion battery pack provided with a flame-retardant and explosion-proof structure in order to solve the problems set forth above.
Disclosure of Invention
The invention aims to provide a lithium ion battery pack with a flame-retardant and explosion-proof structure, which aims to solve the problems that the conventional lithium ion battery pack in the market utilizes flame-retardant sand arranged in the lithium battery pack to extinguish a fire source when the lithium battery catches fire, and simultaneously utilizes a rubber sealing tube to prevent external air from entering the shell, so that the lithium ion battery pack has a certain flame-retardant effect when the lithium battery catches fire, but is inconvenient to discharge oxygen existing in the lithium battery shell outwards when the lithium battery catches fire, so that the oxygen originally existing in the shell can play a certain combustion-supporting effect, and the whole flame-retardant efficiency is greatly reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a lithium ion battery pack with a flame-retardant and explosion-proof structure comprises a battery shell and lithium ion battery bodies, wherein a plurality of groups of lithium ion battery bodies are arranged in the battery shell;
further comprising:
the metal plate is arranged in the battery shell, a cavity formed by the middle part of the upper end of the metal plate and the lower end of the adjusting plate is filled with flame-retardant sand, the adjusting plate is arranged in the battery shell, and the adjusting plate and the interior of the battery shell are connected with each other through a built-in spring;
the conveying port is mounted on the metal plate, a blocking plate is arranged inside the conveying port, the upper end face and the lower end face of the blocking plate are arched outwards to form a protruding part, the blocking plate is inserted into the supporting block in a penetrating mode, and a first air bag is arranged inside the supporting block;
the pull rope is used for connecting the barrier plate and the second air bag, and a counterweight ball is embedded at the bottom of the second air bag;
one end of the circulating pipe is connected with the first air bag in the supporting block, the other end of the circulating pipe is connected to the side of the rubber ring, and the rubber ring is arranged in the conveying port;
the conduction pipe is fixedly arranged on the inner side of the battery shell, a leakage opening is formed in the conduction pipe, a connection air bag is fixedly connected to the interior of the conduction pipe, an exhaust pipe is arranged at the upper end of the connection air bag, an air suction pipe is arranged at the lower end of the connection air bag, and check valves are arranged on the air suction pipe and the exhaust pipe;
the haulage rope is used for connecting regulating plate and center pin, the outside of center pin is provided with the torque spring who provides elasticity that resets, and installs the cam on the center pin, the cam setting is in the inboard of contradicting the frame, and the upper end of contradicting the frame stretches into the inside to the conduction tube.
Preferably, the outer wall of the adjusting plate and the inner wall of the battery shell are mutually attached, and an elastic telescopic structure is formed between the adjusting plate and the battery shell through an internal spring.
Through adopting above-mentioned technical scheme, the inner wall of regulating plate and battery case laminates each other to can improve the stability that the regulating plate removed on the battery case, utilize built-in spring's setting to make the regulating plate after its motion rebound simultaneously and reset.
Preferably, the blocking plate and the first air bag are both rectangular, the blocking plate and the transmission port are in sliding connection, and the upper end face, the lower end face and the protruding portion of the blocking plate are in an integrally formed structure.
Through adopting above-mentioned technical scheme, thereby can realize carrying out the shutoff or opening the transmission mouth through the inside removal of baffling board in the transmission mouth, make its fire-retardant sand can be normal the whereabouts to the region of catching fire.
Preferably, the second air bag and the counterweight ball are fixedly connected, the diameter of the counterweight ball is equal to the width of the second air bag, and the counterweight ball is mutually fixed with the metal plate in an adhesive manner.
Through adopting above-mentioned technical scheme, when battery case is inside to take place the condition of a fire, the metal sheet absorbs a large amount of heats, thereby can make its glue take place to melt through the heat that the metal sheet absorbed this moment, makes its counter weight ball carry out free fall.
Preferably, the counterweight ball and the leakage port on the conduction pipe are positioned on the same vertical line, the outer end of the conduction pipe is open, and the inner end of the conduction pipe is closed.
Through adopting above-mentioned technical scheme, counter weight ball and leakage opening are located same vertical straight line, thereby counter weight ball can enter into the inside to the conduction pipe through the leakage opening after taking place the free fall this moment, utilizes the opening of honeycomb duct outer end simultaneously to can make its air carry out normal circulation.
Preferably, be fixed connection between the inner wall that links up gasbag and conduction pipe, and link up the gasbag and set up to elastic material to link up the gasbag all with the blast pipe with inhale and communicate each other between the pipe.
Through adopting above-mentioned technical scheme, thereby it can outwards discharge through the blast pipe with its inside air after receiving the extrusion to link up the gasbag in the inside of conduction pipe, links up the gasbag simultaneously and stops to receive the extrusion back, can kick-back through its self elasticity and reset.
Preferably, the center rod and the cam are in key connection, and a rotating structure is formed between the lower end of the center rod and the interior of the battery shell.
Through adopting above-mentioned technical scheme, utilize the rotation of well core rod to make the cam of its upper fixed connection carry out synchronous revolution.
Preferably, the abutting frame is of a rectangular structure, and the inner side of the abutting frame and the cam are located on the same horizontal straight line.
Through adopting above-mentioned technical scheme, thereby utilize the rotation of cam to promote conflict frame, make its conflict frame can carry out reciprocating motion about under the promotion of cam.
Preferably, the upper end outer wall of conflict frame and the inner wall of conduction pipe laminate each other, and constitute sliding connection structure between the inner of conflict frame and conduction pipe.
Through adopting above-mentioned technical scheme, the upper end outer wall of conflict frame and the inner wall of conduction pipe laminate each other to can improve the stability of conflict frame removal on the conduction pipe, prevent that its phenomenon that appears rocking.
Compared with the prior art, the invention has the beneficial effects that: the lithium ion battery pack with the flame-retardant and explosion-proof structure can conveniently and timely extinguish internal goods sources in the using process, and can timely discharge oxygen in the shell of the lithium ion battery pack outwards in case of fire, so that the overall fire extinguishing efficiency is improved;
1. the barrier plate is arranged, when a fire occurs in the battery shell, the metal plate absorbs a large amount of heat, the glue solution of the metal plate can be melted after the metal plate absorbs heat, the counterweight ball makes free falling motion by utilizing the gravity of the counterweight ball, the counterweight ball falls into the conduction pipe through the leakage port to block the conduction pipe, external air is prevented from continuously entering the battery shell, oxygen is isolated, the counterweight ball can move to pull the barrier plate to move to the outer side of the transmission port under the action of the pull rope, the transmission port can be opened by utilizing the movement of the barrier plate, and flame-retardant sand continuously falls downwards through the transmission port to be paved in a fire area to play a further flame-retardant role;
2. the balance weight ball is arranged, when the balance weight ball falls into the conduction pipe, flame-retardant sand is discharged outwards through the transmission port, the adjusting plate moves downwards after the flame-retardant sand is reduced, the central rod of the adjusting plate can drive the cam to rotate under the action of the traction rope by utilizing the movement of the adjusting plate, the collision frame can perform left-right reciprocating movement through the rotation of the cam, the balance weight ball can move in the conduction pipe by performing left-right reciprocating movement of the collision frame, the linking airbag can be continuously extruded by utilizing the reciprocating movement of the balance weight ball, air in the battery shell can be sucked into the linking airbag through the air suction pipe by recovering and deforming the linking airbag, the air sucked into the linking airbag is discharged outwards through the exhaust pipe, and the oxygen content in the battery shell is reduced;
3. be provided with the second gasbag, when reciprocating motion was controlled in the inside of conduction pipe to the counter weight ball, the removal of counter weight ball can utilize stay cord pulling baffler to remove, can last the extrusion to first gasbag through the bulge on it after the baffler continues to be pulled, thereby utilize the continuous extrusion of first gasbag to make its rubber circle take place intermittent type formula inflation under the effect of circulation pipe, thereby utilize the intermittent type formula inflation of rubber circle to play the mediation effect to the inside fire-retardant husky of transmission mouth, prevent that the phenomenon of jamming from appearing in the inside of transmission mouth to fire-retardant husky.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 3 is a schematic perspective view of the support block and the first bladder of the present invention;
FIG. 4 is a perspective view of the barrier plate and the protrusion of the present invention;
FIG. 5 is a schematic view of the bottom cross-section of the transfer port and rubber ring of the present invention;
FIG. 6 is a schematic perspective view of a conduction tube and a leakage port of the present invention;
FIG. 7 is a schematic side view of a catheter and engagement balloon in accordance with the present invention;
FIG. 8 is a schematic top view of the cam and the interference frame of the present invention;
FIG. 9 is a schematic cross-sectional view of the center rod and torsion spring of the present invention.
In the figure: 1. a battery case; 2. a lithium ion battery body; 3. a metal plate; 4. an adjusting plate; 5. a built-in spring; 6. a transfer port; 7. a barrier plate; 8. a projection; 9. a support block; 10. a first air bag; 11. pulling a rope; 12. a second air bag; 13. a counterweight ball; 14. a flow-through tube; 15. a rubber ring; 16. a conduction pipe; 17. a leakage port; 18. connecting the air bags; 19. an exhaust pipe; 20. an air intake duct; 21. a one-way valve; 22. a hauling rope; 23. a center pole; 24. a torsion spring; 25. a cam; 26. a support frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.
Referring to fig. 1-9, the present invention provides a technical solution: a lithium ion battery pack with a flame-retardant and explosion-proof structure comprises a battery shell 1 and lithium ion battery bodies 2, wherein a plurality of groups of lithium ion battery bodies 2 are arranged in the battery shell 1; further comprising: the metal plate 3 is arranged in the battery shell 1, a cavity formed by the middle part of the upper end of the metal plate 3 and the lower end of the adjusting plate 4 is filled with flame-retardant sand, the adjusting plate 4 is arranged in the battery shell 1, and the adjusting plate 4 and the interior of the battery shell 1 are connected with each other through a built-in spring 5; the conveying port 6 is installed on the metal plate 3, a blocking plate 7 is arranged inside the conveying port 6, the upper end face and the lower end face of the blocking plate 7 are arched outwards to form a convex part 8, the blocking plate 7 penetrates through and is inserted into a supporting block 9, and a first air bag 10 is arranged inside the supporting block 9;
the pull rope 11 is used for connecting the barrier plate 7 and the second air bag 12, and a counterweight ball 13 is embedded at the bottom of the second air bag 12; a circulation pipe 14, one end of which is connected with the first air bag 10 inside the supporting block 9, the other end of which is connected with the side of the rubber ring 15, and the rubber ring 15 is installed inside the transmission port 6; the outer wall of the adjusting plate 4 and the inner wall of the battery shell 1 are mutually attached, and an elastic telescopic structure is formed between the adjusting plate 4 and the battery shell 1 through the built-in spring 5. The blocking plate 7 and the first air bag 10 are both rectangular, the blocking plate 7 is in sliding connection with the transmission port 6, and the upper end face and the lower end face of the blocking plate 7 and the protruding portion 8 are in an integrally formed structure. The second air bag 12 and the counterweight ball 13 are fixedly connected, the diameter of the counterweight ball 13 is equal to the width of the second air bag 12, and the counterweight ball 13 is fixed with the metal plate 3 by gluing. The counterweight ball 13 and the leakage port 17 on the conduction pipe 16 are positioned on the same vertical line, the outer end of the conduction pipe 16 is arranged in an opening shape, and the inner end of the conduction pipe 16 is in a closed shape.
As shown in fig. 1-3 and fig. 6, when the battery case 1 is in use, the conduction pipe 16 disposed at the inner side of the battery case 1 and the leakage port 17 thereon facilitate air circulation, so as to facilitate timely dissipation of heat inside the battery case 1, when a fire occurs inside the battery case 1, the temperature inside the battery case 1 gradually rises, the metal plate 3 absorbs heat inside the battery case 1, the metal plate 3 absorbs a large amount of heat, and then the glue solution fixedly connecting the weight ball 13 and the metal plate 3 to each other melts, at this time, the weight ball 13 loses its restriction and then performs free falling motion, the weight ball 13 falls downward and then enters the conduction pipe 16 through the leakage port 17, the weight ball 13 can block and close the conduction pipe 16, thereby preventing external air from continuously entering the inside of the battery case 1 during the fire, simultaneously after weight ball 13 carries first gasbag 10 and carries out the whereabouts, weight ball 13 can utilize stay cord 11 pulling baffler 7 to remove to the outside of transmission mouth 6 after the whereabouts, removal through baffler 7 can make transmission mouth 6 open, 8 avris of laminating at the inside first gasbag 10 of supporting shoe 9 of bulge on the baffler 7 this moment, the fire-retardant sand of battery case 1 inside is outwards discharged after transmission mouth 6 is opened, thereby it can play certain flame-retardant effect in the area of catching fire to cover through fire-retardant sand, thereby realize the timely putting out of a fire situation.
The conduction pipe 16 is fixedly arranged on the inner side of the battery shell 1, a leakage opening 17 is formed in the conduction pipe 16, the connection air bag 18 is fixedly connected to the inside of the conduction pipe 16, an exhaust pipe 19 is arranged at the upper end of the connection air bag 18, an air suction pipe 20 is arranged at the lower end of the connection air bag 18, and check valves 21 are arranged on the air suction pipe 20 and the exhaust pipe 19; the haulage rope 22 for connect regulating plate 4 and center rod 23, the outside of center rod 23 is provided with the torsion spring 24 that provides the elasticity that resets, and installs cam 25 on center rod 23, and cam 25 sets up the inboard at conflict frame 26, and the upper end of conflict frame 26 stretches into the inside to conduction pipe 16. The connecting air bag 18 is fixedly connected with the inner wall of the conduction pipe 16, the connecting air bag 18 is made of elastic materials, and the connecting air bag 18 is communicated with the exhaust pipe 19 and the suction pipe 20. The center rod 23 and the cam 25 are keyed, and a rotating structure is formed between the lower end of the center rod 23 and the inside of the battery case 1. The collision frame 26 is configured as a rectangular structure, and the inner side of the collision frame 26 and the cam 25 are located on the same horizontal straight line. The upper end outer wall of the abutting frame 26 and the inner wall of the conduction pipe 16 are mutually attached, and a sliding connection structure is formed between the abutting frame 26 and the inner end of the conduction pipe 16.
As shown in fig. 1-9, after the counterweight ball 13 falls into the conduction pipe 16, the fire-retardant sand is continuously discharged outwards, the adjusting plate 4 moves downwards after the fire-retardant sand is continuously discharged outwards, the central rod 23 can be pulled to rotate under the action of the traction rope 22 after the adjusting plate 4 gradually moves downwards, the cam 25 on the central rod 23 can synchronously rotate through the rotation of the central rod 23, the collision frame 26 can reciprocate left and right through the rotation of the cam 25, when the upper end of the collision frame 26 moves to the outer side of the conduction pipe 16, the counterweight ball 13 can be pushed to move in the conduction pipe 16, the counterweight ball 13 can further pull the blocking plate 7 on the supporting block 9 through the pull rope 11 after moving outwards in the conduction pipe 16 to move, and the first air bag 10 can be squeezed through the protruding part 8 on the blocking plate 7 through the further movement of the blocking plate 7, when the upper end of the abutting frame 26 moves towards the inner side of the conducting pipe 16, the protruding part 8 on the blocking plate 7 stops extruding the first air bag 10, the first air bag 10 pops the protruding part 8 outwards, the blocking plate 7 can pull the counterweight ball 13 to reset by using the pull rope 11 after being popped, therefore, the reciprocating movement of the blocking plate 7 can continuously extrude the first air bag 10 through the protruding part 8, the rubber ring 15 of the first air bag 10 can be intermittently expanded through the circulating pipe 14 after being continuously pressed, the intermittent expansion of the rubber ring 15 in the conveying port 6 is utilized, the flame-retardant sand in the conveying port 6 can be dredged, the phenomenon that the flame-retardant sand is blocked in the conveying port 6 is prevented, and when the counterweight ball 13 reciprocates left and right under the pushing of the abutting frame 26 on the conducting pipe 16, the connecting air bag 18 in the conducting pipe 16 can be continuously extruded by using the counterweight ball 13, after the connection airbag 18 is continuously pressurized, the air in the battery case 1 can be sucked into the connection airbag 18 through the air suction pipe 20, and the air sucked into the connection airbag 18 is discharged outward through the air discharge pipe 19, thereby further reducing the content of oxygen in the battery case 1.
The working principle is as follows: when the lithium ion battery pack with the flame-retardant and explosion-proof structure is used, firstly, as shown in fig. 1-9, after heat absorption, the glue of the metal plate 3 can be melted, at the moment, the counterweight ball 13 can freely fall into the conduction pipe 16, so that the conduction pipe 16 is sealed by the counterweight ball 13, external air is prevented from entering the battery shell 1, meanwhile, the movement of the counterweight ball 13 can enable the baffle plate 7 to move towards the outer side of the transmission port 6 under the action of the pull rope 11, the transmission port 6 can be opened by the movement of the baffle plate 7, at the moment, the flame-retardant sand is discharged outwards through the transmission port 6 and covers a fire area, the central rod 23 can be pulled to rotate under the action of the adjusting plate 4 and the pull rope 22 by the reduction of the flame-retardant sand, the central rod 23 can enable the left-right reciprocating movement of the bracket 26 under the action of the cam 25 by the rotation of the central rod 23, reciprocating motion through conflict frame 26 and then can be in making its counter weight ball 13 carry out reciprocating motion in the inside of conduction pipe 16, reciprocating motion through counter weight ball 13 can continue the extrusion to linking gasbag 18, thereby can utilize blast pipe 19 and breathing pipe 20 outwards to discharge the inside air of battery case 1 through linking the continuous extrusion of gasbag 18, simultaneously can drive baffle 7 under the effect of stay cord 11 through reciprocating motion of counter weight ball 13 and carry out further reciprocating motion, reciprocating motion through baffle 7 passes through bulge 8 and continues the extrusion to first gasbag 10, can make its rubber circle 15 take place to last inflation under the effect of circulation pipe 14 after first gasbag 10 lasts the pressurized, and then can play the mediation effect to transmission mouth 6 through the lasting inflation of rubber circle 15, avoid fire-retardant sand to take place to block up in the inside of transmission mouth 6.
Those not described in detail in this specification are within the skill of the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (9)

1. A lithium ion battery pack with a flame-retardant and explosion-proof structure comprises a battery shell (1) and lithium ion battery bodies (2), wherein a plurality of groups of lithium ion battery bodies (2) are arranged in the battery shell (1);
it is characterized by also comprising:
the battery comprises a metal plate (3) arranged inside a battery shell (1), wherein a cavity formed by the middle part of the upper end of the metal plate (3) and the lower end of an adjusting plate (4) is filled with flame-retardant sand, the adjusting plate (4) is arranged inside the battery shell (1), and the adjusting plate (4) and the inside of the battery shell (1) are connected with each other through a built-in spring (5);
the conveying port (6) is mounted on the metal plate (3), a blocking plate (7) is arranged inside the conveying port (6), the upper end face and the lower end face of the blocking plate (7) are arched outwards to form a protruding part (8), the blocking plate (7) penetrates through and is inserted into the supporting block (9), and a first air bag (10) is arranged inside the supporting block (9);
the pull rope (11) is used for connecting the barrier plate (7) and the second air bag (12), and a counterweight ball (13) is embedded in the bottom of the second air bag (12);
one end of the circulating pipe (14) is mutually connected with the first air bag (10) in the supporting block (9), the other end of the circulating pipe (14) is connected to the side of the rubber ring (15), and the rubber ring (15) is arranged in the transmission port (6);
the battery comprises a battery shell (1), a conduction pipe (16) and a connecting air bag (18), wherein the conduction pipe (16) is fixedly installed on the inner side of the battery shell (1), a leakage opening (17) is formed in the conduction pipe (16), the connecting air bag (18) is fixedly connected to the inside of the conduction pipe (16), an exhaust pipe (19) is arranged at the upper end of the connecting air bag (18), an air suction pipe (20) is arranged at the lower end of the connecting air bag (18), and check valves (21) are installed on the air suction pipe (20) and the exhaust pipe (19);
haulage rope (22), be used for connecting regulating plate (4) and center pin (23), the outside of center pin (23) is provided with torsion spring (24) that provide the elasticity that resets, and installs cam (25) on center pin (23), cam (25) set up in the inboard of contradicting frame (26), and contradict the inside that the upper end of frame (26) stretched into conduction pipe (16).
2. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the outer wall of the adjusting plate (4) is attached to the inner wall of the battery shell (1), and the adjusting plate (4) and the battery shell (1) form an elastic telescopic structure through the built-in spring (5).
3. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the blocking plate (7) and the first air bag (10) are both rectangular, the blocking plate (7) and the transmission port (6) are in sliding connection, and the upper end face and the lower end face of the blocking plate (7) and the protruding portion (8) are in an integrally formed structure.
4. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the second air bag (12) and the counterweight ball (13) are fixedly connected, the diameter of the counterweight ball (13) is equal to the width of the second air bag (12), and the counterweight ball (13) is fixed with the metal plate (3) in an adhesive mode.
5. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 4, wherein: the counterweight ball (13) and the leakage port (17) on the conduction pipe (16) are positioned on the same vertical line, the outer end of the conduction pipe (16) is open, and the inner end of the conduction pipe (16) is closed.
6. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the inner walls of the connecting air bag (18) and the conduction pipe (16) are fixedly connected, the connecting air bag (18) is made of elastic materials, and the connecting air bag (18) is communicated with the exhaust pipe (19) and the air suction pipe (20).
7. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the center rod (23) and the cam (25) are in key connection, and a rotating structure is formed between the lower end of the center rod (23) and the inside of the battery shell (1).
8. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the collision frame (26) is of a rectangular structure, and the inner side of the collision frame (26) and the cam (25) are located on the same horizontal straight line.
9. The lithium ion battery pack provided with the flame-retardant and explosion-proof structure according to claim 1, wherein: the upper end outer wall of conflict frame (26) and the inner wall of conduction pipe (16) laminate each other, and constitute sliding connection structure between the inner of conflict frame (26) and conduction pipe (16).
CN202111584312.8A 2021-12-23 2021-12-23 Lithium ion battery pack with flame-retardant and explosion-proof structure Pending CN114374034A (en)

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CN202111584312.8A CN114374034A (en) 2021-12-23 2021-12-23 Lithium ion battery pack with flame-retardant and explosion-proof structure

Applications Claiming Priority (1)

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CN202111584312.8A CN114374034A (en) 2021-12-23 2021-12-23 Lithium ion battery pack with flame-retardant and explosion-proof structure

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CN114374034A true CN114374034A (en) 2022-04-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114944530A (en) * 2022-06-30 2022-08-26 凤凰新能源(惠州)有限公司 Flame-retardant and explosion-proof polymer lithium ion battery
CN115411446A (en) * 2022-10-13 2022-11-29 盐城师范学院 Multi-protection lithium ion battery and protection method thereof
CN115882041A (en) * 2022-09-23 2023-03-31 扬州工业职业技术学院 Solid-state lithium ion battery system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114944530A (en) * 2022-06-30 2022-08-26 凤凰新能源(惠州)有限公司 Flame-retardant and explosion-proof polymer lithium ion battery
CN115882041A (en) * 2022-09-23 2023-03-31 扬州工业职业技术学院 Solid-state lithium ion battery system
CN115411446A (en) * 2022-10-13 2022-11-29 盐城师范学院 Multi-protection lithium ion battery and protection method thereof
CN115411446B (en) * 2022-10-13 2023-08-18 盐城师范学院 Multiple-protection lithium ion battery and protection method thereof

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Application publication date: 20220419