CN115963295A - Lithium battery needling test flame-retardant device and test method - Google Patents
Lithium battery needling test flame-retardant device and test method Download PDFInfo
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- CN115963295A CN115963295A CN202211705833.9A CN202211705833A CN115963295A CN 115963295 A CN115963295 A CN 115963295A CN 202211705833 A CN202211705833 A CN 202211705833A CN 115963295 A CN115963295 A CN 115963295A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 122
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 239000003063 flame retardant Substances 0.000 title claims abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000010998 test method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000004831 Hot glue Substances 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 8
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000001467 acupuncture Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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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Abstract
The invention discloses a lithium battery needling test flame-retardant device and a test method in the technical field of lithium battery needling equipment, and aims to solve the problems that in the prior art, after lithium battery needling fires, an ignition source is high in cost, an automatic program is complex and the like. It is including the water tank that is used for providing reaction space for the fixing device of clamping lithium cell can carry out the measuring stylus of fusing and the clamp splice that has special construction after the lithium cell burning, and the clamping device can be opened release lithium cell by force at the puncture in-process, and the measuring stylus can drop the aqueous solution that realizes the fire extinguishing function to the water tank below by oneself after carrying out the fusing. The device is used for cooling and extinguishing fire for the burning lithium battery in the lithium battery needling experiment, does not need to prepare extra spraying environment and equipment, can realize the automation of extinguishing fire through mechanical components on the basis of the original test base material, and can effectively reduce the fire extinguishing cost so as to promote the reduction of the test cost.
Description
Technical Field
The invention relates to a lithium battery needling test flame-retardant device and a test method, and belongs to the technical field of lithium battery needling equipment.
Background
Lithium battery needling test, the fully charged battery is placed on a flat surface and the battery is pierced radially by a steel needle with a diameter of 3-8 mm. The test battery does not catch fire or explode. Because power battery is in practical application occasion, the possibility that the foreign matter pierces the inside battery package and leads to the battery to take place the short circuit exists, and the acupuncture test can be fine reaction battery short circuit's emergence condition, when the steel needle pierces, the steel needle provides the route of the inside short circuit of battery, the inside short circuit route that forms of battery, this kind of experiment has simulated two kinds of processes of interior short circuit and outer short circuit simultaneously in fact, the electric energy of battery this moment converts into heat energy, and the storage is inside the battery, the short circuit causes concentrated explosion and the release of energy in the short time, probably produce the cigarette, leak night, even the explosion of catching fire, therefore acupuncture test is compared with other classification's safety test, more easily take place to catch fire and explode.
The acupuncture test aims to test the safety performance of the lithium battery in the practical application process, if a corresponding violent phenomenon occurs, the test requirement can be met, if the lithium battery is not detected to be qualified after puncture, gas generated by continuous combustion or explosion can cause continuous pollution and damage to the surrounding environment, so that timely fire extinguishing is necessary after the lithium battery is ignited, the currently applied fire extinguishing mode mostly adopts a spraying fire extinguishing agent to extinguish fire, but the lithium battery still can burn after air is blocked because a large amount of oxidizing agents are contained in the lithium battery, so that the currently effective mode adopts water cooling for continuous cooling and isolates external oxygen, for the test environment, the most effective and economical method undoubtedly puts the burning battery into water, so that the fire extinguishing can be effectively realized, the tidiness of an experimental site can be well ensured, and multiple continuous experiments are facilitated.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a lithium battery needling test flame-retardant device and a test method, which are used for cooling and extinguishing fire for a burning lithium battery in a lithium battery needling test.
In order to realize the purpose, the invention is realized by adopting the following technical scheme:
a lithium battery needling test flame-retardant device comprises a water tank, wherein an installation block is arranged inside the water tank, and a driving device for driving the installation block to lift is also arranged above the water tank;
the lithium battery protection device comprises a mounting block, a lithium battery, an unloading device and a control device, wherein the mounting block is provided with a measuring pin for puncturing the lithium battery, the measuring pin comprises a connecting end mounted on the mounting block and a puncturing end arranged on the connecting end and used for puncturing the lithium battery, and the unloading device is arranged between the connecting end and the puncturing end and used for disconnecting the puncturing end and the connecting end after the lithium battery is on fire;
the battery fixing device is used for clamping a battery to be tested and is arranged below the penetrating end, and the fixing device is used for releasing the lithium battery after the lithium battery is on fire.
Preferably, in the flame retardant device for the lithium battery needling test, a heat insulation partition plate is arranged inside the water tank and below the battery fixing device, a through opening is formed in the heat insulation partition plate, an openable and closable movable plate is arranged on the through opening, the through opening is rotatably connected with the movable plate through a rotating shaft, and the rotating shaft and the piercing end are arranged in a staggered manner in the horizontal direction.
Preferably, the experimental fire-retardant device of lithium cell acupuncture pierces and serves and be provided with the barb that is used for preventing the lithium cell from dropping from the end of stabbing.
Preferably, the experimental fire-retardant device of lithium cell acupuncture, battery fixing device includes two clamp blocks that set up relatively in the horizontal direction, the clamping face from the top down of clamp block sets gradually into direction inclined plane, vertical clamping face and support inclined plane, two still set up the first spring of connection at the inner wall of water tank on the clamp block, first spring is used for controlling two clamp block self-adaptations and is close to or keeps away from, be provided with the clamp plate on the connecting end, the clamp plate is used for the lithium cell after the extrusion burning and makes the lithium cell cross vertical clamping face and support inclined plane.
Preferably, the flame retardant device for the lithium battery needling test is characterized in that the unloading device is a hot melt adhesive structure layer, and the hot melt adhesive structure layer is fused after the lithium battery is on fire.
Preferably, in the flame retardant device for the lithium battery needling test, the cross section of the pressing plate is in a shape of a 'door' with chamfers on two sides of the upper end.
Preferably, the flame retardant device for the lithium battery needling test is an insertion sleeve arranged at the bottom of the connecting end, an electromagnet used for adsorbing a needling end is arranged at the bottom of the insertion sleeve, and the electromagnet is used for disconnecting the needling end and the connecting end after the lithium battery fires.
Preferably, two, the experimental fire-retardant device of lithium cell acupuncture all installs the slide bar that slides and run through the water tank on the clamp splice, every all the cover is equipped with to touch panel, every on the slide bar the one end that the clamp splice was kept away from to the slide bar all sets up to the screw thread post, threaded connection has the lock nut who is used for fixed touch panel relative position on the screw thread post, every still the cover is equipped with the second spring that both ends contradicted respectively between touch panel and water tank outer wall on the slide bar
Preferably, in the flame retardant device for the lithium battery needling test, the side wall of the movable plate is provided with a first magnet, and the port of the movable plate is provided with a second magnet for adsorbing the first magnet.
Preferably, in the flame retardant device for the lithium battery needling test, the first magnet is a permanent magnet, and the second magnet is an electromagnet.
A method of testing a flame retardant device according to claim, the method comprising the steps of:
mounting a measuring pin at the bottom of the pressure plate, and mounting a battery to be tested between the two clamping blocks;
starting drive arrangement and driving survey and stop drive arrangement's further action after puncturing to the lithium cell, treat the uninstallation device disconnection end and pierce the connection back of end, continue to order about drive arrangement and drive the clamp plate downstream, drive lithium cell and clamp splice through the clamp plate and break away from until the lithium cell freely drops the aquatic.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the cooling water is arranged below the original acupuncture test device, the unloading device is arranged to separate the measuring pins for realizing the puncturing action, the unloading device is used for separating the whole lithium battery from the measuring pins after the lithium battery is on fire, the lithium battery is made to fall into a water pool below the test bed, the burning lithium battery is cooled by utilizing the continuous cooling effect of the water pool, and finally the flame-retardant fire-extinguishing function is realized, compared with other control programs for fire extinguishing, the control cost and the use cost can be effectively reduced, the automatic fire-extinguishing mode is simple, and the popularization and the application are facilitated;
2. according to the invention, the unloading device is set to be a fusible hot melt adhesive structure layer, so that the measuring needle can be automatically fused by using the heat generated after the lithium battery is ignited, an additional intelligent control means is not needed, the operation mode is convenient and fast, and the setting cost of the device can be effectively reduced;
3. according to the invention, the pressure plate provided with the measuring needle is of a structure in a shape like a Chinese character 'men' with chamfers at two sides of the top end, so that a heat source can be concentrated towards the middle part after flame is generated, and the fusing of a hot melt adhesive structure layer can be accelerated; in addition, the two support legs below the pressing plate can provide uniform force application at two ends for the lithium battery, so that the lithium battery can be pressed to normally penetrate through a clamping layer formed by the clamping blocks; and finally, when the control program controls the drive control device to reset, the chamfer structure at the top end of the section can be smoothly recovered from the position of the clamping block, so that the drive control device can be controlled to repeatedly operate.
Drawings
FIG. 1 is a schematic view of the overall structure of a flame retardant device according to an embodiment of the present invention;
FIG. 2 is a front view of a flame retardant device provided by an embodiment of the invention;
FIG. 3 isbase:Sub>A sectional view taken along line A-A ofbase:Sub>A flame retardant device according to the embodiment of FIG. 2;
FIG. 4 is a side view of a flame retardant device provided by an embodiment of the invention;
FIG. 5 is a cross-sectional view taken along line B-B of a flame retardant device according to the embodiment of FIG. 4;
FIG. 6 is an isometric view of the overall construction of the present invention;
reference numerals: 1-a water tank; 2-a drive device; 3-mounting a block; 4-measuring the needle; 401-a connection end; 402-a platen; 403-piercing end; 404-structural layer of hot melt adhesive; 405-barbs; 5-a slide bar; 6-a first spring; 7-a touch panel; 8-clamping blocks; 9-heat preservation partition board; 10-through opening; 11-a movable plate; 12-an air outlet pipe; 13-a water pipe; 14-a threaded post; 15-locking nut; 16-a second magnet; 17-a first magnet; 18-a rotating shaft; 19-coil springs; 20-a chute; 21-sealing the door; 22-a second spring; 81-a guide slope; 82-vertical clamping surface; 83-supporting the ramp.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention provides a lithium battery needling test flame-retardant device, which is used for cooling and extinguishing fire of a burning lithium battery in a lithium battery needling test, does not need to prepare additional spraying environment and equipment, can realize the automation of fire extinguishing through mechanical components on the basis of the original test base material, can effectively reduce the fire extinguishing cost and further promote the reduction of the test cost, and in order to realize the structural function of the device, the device comprises a water tank 1, a mounting block 3 is arranged in the water tank 1, a driving device 2 for driving the mounting block 3 to lift in the water tank 1 is arranged above the water tank 1, the driving device 2 drives the mounting block 3 to move up and down under the action of electric control, and the mounting block 3 is used as a main receptor for providing basic guarantee for the piercing action in the following test due to the variety of various driving devices 2 in the market (including oil pipes, air cylinders and the like).
Before the puncture effect occurs, firstly, the lithium battery needs to be fixed, in order to ensure that the lithium battery can be clamped according to the function of the device, two clamping blocks 8 which are in mirror symmetry are arranged inside the water tank 1, and two clamping blocks 8 are provided with sliding rods 5 which slidably penetrate through the wall of the water tank 1, so that the sliding rods 5 are used for ensuring the moving directions of the two clamping blocks 8 which are close to or far away from each other, namely, the sliding rods 5 are preferably arranged in parallel with each other. The first springs 6 with two ends respectively abutting against the clamping blocks 8 and the inner wall of the water tank 1 are sleeved on each sliding rod 5, so that the first springs 6 are used for extruding the two clamping blocks 8 to clamp the lithium battery to be tested; if only carry out the clamping to the lithium cell through the clamping effort, the puncture action leads to the crooked or directly transfer of lithium cell to drop in the water that 1 below of water tank set up when taking place easily, then can't accomplish the reliable fixed to the lithium cell. For this purpose, the clamping surface of the clamping block 8 is provided with a guide slope 81, a vertical clamping surface 82 and a support slope 83 in this order from top to bottom.
Considering the centering position of the clamping block 8, excessive displacement is avoided, the first spring 6 is required to bear certain pressure and certain tensile force urgently at the moment, the mode of installation on the inner wall of the box body is more inconvenient and easy to pull and disjoint, therefore, in order to simplify the installation mode of the device component, namely the operation convenience, each sliding rod 5 is sleeved with a touch plate 7, one end of each sliding rod 5 far away from the clamping block 8 is provided with a threaded column 14 (shown in fig. 3), the threaded column 14 is in threaded connection with a locking nut 15 for fixing the opposite position of the touch plate 7, and finally each sliding rod 5 is further sleeved with a second spring 22, two ends of which respectively abut against the touch plate 7 and the outer wall of the water tank 1, the second spring 22 can be compressed when the first spring 6 is popped out for a larger distance, and drives the two springs to be finally in a centering state, and each spring is directly sleeved on the sliding rod 5 at the moment without other complicated connection modes.
When the lithium battery is installed, the bottom end of the lithium battery is abutted against the transition position between the vertical clamping surface 82 and the supporting inclined surface 83, and the position stability of the lithium battery between the clamping blocks 8 is guaranteed by the supporting force and the clamping force. This device is mainly through setting up the survey needle 4 that can melt, makes the lithium cell can drop after the fire and drop in the basin that 1 below of water tank set up to finally realize the cooling and put out a fire. In order to realize the function of the measuring pin 4, the measuring pin 4 is mounted at the bottom of the mounting block 3 (see fig. 3 or fig. 5), specifically: the measuring pin 4 comprises a connecting end 401 installed on the installation block 3, a pressing plate 402 arranged on the main rod body and used for pressing the lithium battery, a piercing end 403 used for piercing the lithium battery, and a hot melt adhesive structural layer 404 used for bonding the piercing end 403 and the connecting end 401, wherein when the heated temperature of the hot melt adhesive structural layer 404 reaches a preset value, the hot melt adhesive structural layer 404 is separated from the piercing end 403. The hot melt adhesive structural layer 404 is generally annular in shape for insertion into the piercing end 403.
The hot melt adhesive structural layer 404 is used for fusing after the lithium battery is on fire and then enters the aqueous solution arranged at the bottom of the water tank 1, wherein the arrangement position of the pressing plate 402 is not limited, the lithium battery can be pressed and held and is enabled to cross the clamping block 8, and the lithium battery is not influenced by other fixing actions any more and can automatically fall off after the hot melt adhesive structural layer 404 is melted. This device can be based on former test equipment on only through addding water tank 1, addding corresponding clamping structure and changing the structure that 4 meltings of measuring stylus can be in order to realize automatic mode of putting out a fire, utilize the mechanical type structure need not to prepare extra sensor and spout the device that disappears, compare in traditional automation or the manual fire extinguishing, easy operation security is high, and can effectively reduce the cost of putting out a fire, is favorable to the application popularization of device.
Moreover, the connection end 401 and the puncturing end 403 can be electromagnetically controlled, a plug bush can be arranged at the bottom of the connection end 401, an electromagnet for adsorbing the puncturing end 403 is arranged at the bottom of the plug bush, and in a normal state, under the action of the electromagnet, the upper end of the puncturing end 403 is inserted into the plug bush and is fixed under the adsorption action of the electromagnet. When the test cell burns to a predetermined degree, the piercing end 403 is separated from the electromagnet.
The through hole 10 is rotatably connected to the movable plate 11 through the rotating shaft 18, and the rotating shaft 18 and the puncturing end 403 are horizontally arranged in a staggered manner, so that the situation that the battery falls right above the rotating shaft 18 when falling is avoided, and the battery is not favorable for opening the movable plate 11 through gravity.
In order to ensure the heat preservation performance of the heat preservation partition plate 9 and ensure the opening and closing of the movable plate 11 to ensure that the lithium battery normally falls into the water tank below, two examples are provided for solving the problem of the opening and closing of the movable plate 11:
example one: as shown in fig. 5, when the lithium battery falls onto the movable plate 11, a lithium battery body slides on the movable plate 11 due to imbalance, and the farther the lithium battery is away from the center of the rotating shaft 18, the larger the applied torque is, the larger the inclination angle of the movable plate 11 at the moment is, until the lithium battery falls into a water tank below, after the lithium battery falls into the water tank, the coil spring 19 drives the movable plate 11 to return, and the sealing of the heat preservation partition plate 9 is realized again through the adsorption effect of the first magnet 17 and the second magnet 16;
example two: this example is different from the first example in that the first magnet 17 is provided as a permanent magnet and the second magnet 16 is provided as an electromagnet, and when the movable plate 11 needs to be in the open state, a force generated between the second magnet 16 and the first magnet 17 is a repulsive force; when the movable plate 11 is in the open state, the force generated between the second magnet 16 and the first magnet 17 is a repulsive force, the structure can be matched with the structure of the measuring pin 4 which is an electromagnet type unloading device, when the electromagnet controlling the measuring pin 4 changes, the magnetic pole change of the second magnet 16 can be synchronously controlled, namely, the movable plate 11 can be synchronously opened when the lithium battery falls off, after the lithium battery normally acts, the power is cut off to cancel the magnetism of the second magnet 16, the movable plate 11 tends to be centered by utilizing the centering action of the coil spring 19, and the movable plate 11 is electrified again to position the balance position of the movable plate 11 after the centering action is completed.
In order to facilitate the removal and further treatment of the gas generated in the reaction chamber, an air outlet pipe 12 is communicated with the position of the water tank 1 above the heat-insulating partition plate 9, and in order to facilitate the replacement of the aqueous solution or the introduction of the circulated cooling water, a water pipe 13 is communicated with the position of the water tank 1 below the heat-insulating partition plate 9.
In order to prevent the lithium battery from falling off the measuring pin 4 due to the deformation and gravity action of the pressing plate 402 after the lithium battery is driven to pass through the clamping block 8, and at this time, the lithium battery is easy to directly fall off the measuring pin 4 even if the spontaneous combustion phenomenon does not occur, so that the normal operation of the test is influenced, in order to avoid the phenomenon, the piercing end 403 is provided with a barb 405 for preventing the lithium battery from falling off from the piercing end 403.
The present embodiment further provides a structure of the pressure plate 402 and a positional relationship between the pressure plate 402 and the hot melt adhesive structure layer 404, specifically, referring to fig. 3, the cross-sectional shape of the pressure plate 402 is set to be "door" shape with chamfered shapes at both sides of the upper end, and the hot melt adhesive structure layer 404 is bonded to the top of the inner wall of the pressure plate 402, which has three advantages with respect to the above-mentioned structure and the arrangement of the related positions: firstly, the pressing plate 402 designed into the shape structure can realize uniform stress on two sides of the lithium battery, and can avoid that the lithium battery cannot be separated from the position of the clamping block 8 normally because the measuring pin 4 integrally penetrates through the lithium battery due to overlarge pressure applied to the damaged position of the lithium battery by the pressing plate 402 in the clamping process; secondly, the structure in the shape of a Chinese character 'men' can be used for concentrating a heat source generated by flame to the position of the hot melt adhesive structure layer 404, so that the lithium battery can be fused in a shorter time after being ignited; thirdly, the chamfered structure can be normally retracted after the pressing plate 402 passes over the position of the clamping block 8, which is beneficial for the driving device 2 to drive the mounting block 3 to reciprocate.
In order to facilitate the operation and installation or other treatment of the lithium battery inside the water tank 1, an operation opening may be provided above the water tank 1, in order to ensure the closed thermal insulation and safety conditions of the test environment, sliding grooves 20 may be provided on both sides of the operation opening, and a sealing door 21 for sealing the water tank 1 is slidably provided between the two sliding grooves 20 to seal the operation opening.
Considering that the hot melt adhesive structure layer 404 is easy to keep a certain adsorption capacity after melting to adsorb the piercing end 403 and the lithium battery if a common bonding mode is used, and is not convenient to fall off under the condition that the piercing end 403 does not have skew air leakage, for this reason, the hot melt adhesive structure layer 404 can be arranged as an adhesive column, the structure layer is respectively bonded with the connecting end 401 and the piercing end 403 in a bonding mode after being baked and melted at two ends, and at the moment, the lithium battery can burn off the adhesive column after being ignited, which is beneficial to ensuring a good disjointed breaking effect.
The embodiment also discloses a test method adopting the lithium battery needling test flame-retardant device, which specifically comprises the following steps:
mounting the probe 4 at the bottom of the press plate 402, and mounting the battery to be tested between the two clamping blocks 8; starting drive arrangement 2 and driving the survey probe and puncturing the lithium cell and then stopping drive arrangement 2's further action, when waiting to burn to predetermineeing the degree, uninstallation device disconnection end 401 with pierce the connection of end 403, continue to order about drive arrangement 2 and drive clamp plate 402 and move down, drive lithium cell and clamp splice 8 through clamp plate 402 and break away from until the lithium cell drops in the water of water tank 1 below.
Compared with the prior art, the cooling water is arranged below the original acupuncture test device, the separable measuring pins are configured, the measuring pins are separated after the lithium battery is ignited, the lithium battery falls into the water tank below the test bed, the burning lithium battery is cooled by utilizing the continuous cooling effect of the water tank and isolated from external oxygen, and finally the function of flame-retardant fire extinguishing is realized.
According to the invention, the pressure plate provided with the measuring needle is of a structure in a shape like a Chinese character 'men' with chamfers at two sides of the top end, so that a heat source can be concentrated towards the middle part after flame is generated, and the fusing of a hot melt adhesive structure layer can be accelerated; in addition, the two support legs below the pressing plate can provide uniform force application at two ends for the lithium battery, so that the lithium battery can be pressed to normally penetrate through a clamping layer formed by the clamping blocks; and finally, when the control program controls the drive control device to reset, the chamfer structure at the top end of the section can be smoothly recovered from the position of the clamping block, so that the drive control device can be controlled to repeatedly operate.
The invention is simple and reliable, avoids realizing the mass injection of the cooling water or the fire extinguishing agent on site, and is beneficial to ensuring the tidiness of the experimental site.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. The flame retardant device for the lithium battery needling test is characterized by comprising a water tank (1), wherein a mounting block (3) is arranged inside the water tank (1), and a driving device (2) for driving the mounting block (3) to ascend and descend is further arranged above the water tank (1);
the lithium battery testing device is characterized in that a measuring pin (4) used for puncturing a lithium battery is installed on the installation block (3), the measuring pin (4) comprises a connecting end (401) installed on the installation block (3) and a puncturing end (403) arranged on the connecting end (401) and used for puncturing the lithium battery, an unloading device is arranged between the connecting end (401) and the puncturing end (403), and the unloading device is used for disconnecting the puncturing end (403) from the connecting end (401) after the lithium battery is ignited;
the battery fixing device is used for clamping a battery to be tested and is arranged below the penetrating end (403), and the fixing device is used for releasing the lithium battery after the lithium battery is ignited.
2. The lithium battery needling test flame retardant device according to claim 1, wherein a heat insulation partition plate (9) is arranged inside the water tank (1) and below the battery fixing device, a through hole (10) is formed in the heat insulation partition plate (9), an openable and closable movable plate (11) is arranged on the through hole (10), the through hole (10) is rotatably connected with the movable plate (11) through a rotating shaft (18), and the rotating shaft (18) and the piercing end (403) are arranged in a staggered manner in the horizontal direction.
3. The lithium battery needling test flame retardant device according to claim 1, wherein the battery fixing device comprises two clamping blocks (8) which are oppositely arranged in the horizontal direction, the clamping surfaces of the clamping blocks (8) are sequentially arranged into a guide inclined surface (81), a vertical clamping surface (82) and a support inclined surface (83) from top to bottom, a first spring (6) connected to the inner wall of the water tank (1) is further arranged on each clamping block (8), the first spring (6) is used for controlling the two clamping blocks (8) to be self-adaptive to approach or keep away from each other, a pressing plate (402) is arranged on the connecting end (401), and the pressing plate (402) is used for extruding the lithium battery after combustion and enabling the lithium battery to cross the vertical clamping surface (82) and the support inclined surface (83).
4. The lithium battery needling test flame retardant device according to any one of claims 1 to 3, wherein the unloading device is a hot melt adhesive structural layer (404), and the hot melt adhesive structural layer (404) is used for fusing after a lithium battery fires.
5. The lithium battery needling test flame retardant device according to claim 4, wherein the cross-sectional shape of the pressure plate (402) is a 'door' shape with a chamfered shape on both sides of the upper end.
6. The lithium battery needling test flame retardant device according to any one of claims 1 to 3, wherein the unloading device is a plug bush arranged at the bottom of the connecting end (401), the bottom of the plug bush is provided with an electromagnet for adsorbing the piercing end (403), and the electromagnet is used for disconnecting the piercing end (403) and the connecting end (401) after the lithium battery is ignited.
7. The lithium battery needling test flame retardant device according to claim 3, characterized in that two slide bars (5) which slide through the water tank (1) are installed on the two clamping blocks (8), each slide bar (5) is sleeved with a touch panel (7), each slide bar (5) is far away from one end of the clamping block (8) and is provided with a threaded column (14), the threaded column (14) is connected with a locking nut (15) for fixing the relative position of the touch panel (7) in a threaded manner, and each slide bar (5) is further sleeved with a second spring (22) with two ends respectively abutting between the touch panel (7) and the outer wall of the water tank (1).
8. The lithium battery needling test flame retardant device according to claim 2, wherein a coil spring (19) for driving the movable plate (11) to a horizontal position is mounted on the rotating shaft (18), a first magnet (17) is arranged on the side wall of the movable plate (11), and a second magnet (16) for adsorbing the first magnet (17) is arranged on the through hole (10) of the movable plate (11).
9. The lithium battery needling test flame retardant device according to claim 8, wherein the first magnet (17) is a permanent magnet, and the second magnet (16) is an electromagnet.
10. A method for testing a fire retardant device according to claim 3, comprising the steps of:
a measuring pin (4) is arranged at the bottom of a pressure plate (402), and a battery to be tested is arranged between two clamping blocks (8);
and starting the driving device (2) to drive the measuring needle to puncture the lithium battery and then stopping the further action of the driving device (2), after the unloading device is disconnected from the connecting end (401) and the puncturing end (403), continuously driving the driving device (2) to drive the pressing plate (402) to move downwards, and driving the lithium battery to be separated from the clamping block (8) through the pressing plate (402) until the lithium battery falls into water freely.
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