Ignition Limit Test System and Test Method for Organic Electrolyte under High-Temperature Jet Condition

Abstract

The present invention discloses a test system and a test method for the ignition limit of an organic electrolyte in a high-temperature jet state, including: a protection device, which includes a box body. A smoke exhaust port is provided at the top of the box body, and a monitoring module is installed inside the box body; a temperature control device, which includes an industrial control box and a controller. The controller is installed inside the industrial control box, and a heater is installed on the top of the industrial control box; a reaction device, which includes a reaction chamber. A top cover is installed at the top of the reaction chamber, and a spray pipeline is vertically installed on the top of the top cover. A manual valve and a solenoid valve are arranged on the spray pipeline, and an adjustable nozzle is installed at the top end of the spray pipeline; an ignition device, which includes a bracket and an ignition component. A baffle is installed on the top of the bracket; wherein, an air inlet module, a liquid inlet module, an exhaust module, a pressure measurement module, a pressure relief module and a temperature measurement module are respectively arranged on the top cover. The present invention can test the ignition limit of different types of organic electrolytes in a high-temperature jet state.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery safety, and particularly to a testing system and a testing method for the ignition limit of an organic electrolyte under a high-temperature spraying state. Background Art

[0002] Flammable organic solvents (carbonates and ethers) are generally used in commercial lithium-ion battery electrolytes, and the combustion energy they bring is greater than the electrochemical energy of the battery cell. Moreover, potential ignition heat sources in lithium-ion batteries also pose great difficulties to the fire prevention of the batteries. In particular, thermal runaway reactions contribute a large amount of heat to lithium-ion battery fires. During the process of a lithium-ion battery fire, thermal runaway reactions always occur due to internal short circuits. Subsequently, thermal runaway leads to the accumulation of internal pressure and the rupture and exhaust of the battery. Aerosol droplets, electrolyte vapors, and decomposition products are ejected at high temperatures and can be ignited by the entrained air, forming a diffusion jet flame. Therefore, studying the ignition of the electrolyte under a high-temperature spraying state is of great significance for the safety of lithium-ion batteries.

[0003] Existing testing methods for the ignition characteristics of organic electrolytes in lithium-ion batteries mostly follow traditional testing methods for the ignition characteristics of flammable liquids, such as flash point testing and explosion limit testing. These testing methods have long occupied an important position in the field of fire safety assessment, providing basic data for the preliminary judgment of the fire hazard of organic electrolytes and ensuring the safety of lithium-ion batteries to a certain extent. However, these testing methods also have obvious limitations. Flash point testing mainly focuses on the lowest temperature at which the vapor concentration on the liquid surface reaches a combustible state under static conditions, and explosion limit testing focuses on determining the concentration range in which a combustible gas or vapor can explode when mixed with air. They are often carried out under relatively ideal and single conditions. In actual application scenarios, organic electrolyte fires are often accompanied by complex thermal runaway processes, such as jet combustion phenomena, and traditional testing methods are difficult to comprehensively and accurately evaluate the fire risks in such complex situations.

[0004] Therefore, there is an urgent need for a testing system and a testing method for the ignition limit of an organic electrolyte under a high-temperature spraying state to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a testing system and a testing method for the ignition limit of an organic electrolyte under a high-temperature spraying state to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a testing system for the ignition limit of an organic electrolyte under a high-temperature spraying state, including:

[0007] A protection device, the protection device includes a box body, a smoke exhaust port is opened at the top of the box body, and a monitoring module is installed in the box body;

[0008] Temperature control device, the temperature control device includes an industrial control box and a controller, the industrial control box is fixed at the bottom inside the box body, the controller is installed inside the industrial control box, a heater is installed on the top of the industrial control box, and an inward concave heating groove is arranged on the top of the heater;

[0009] Reaction device, the reaction device includes a reaction chamber, the reaction chamber is installed in the inward concave heating groove of the heater, a top cover is installed on the top of the reaction chamber, a stirring module is installed inside the reaction chamber, a spraying pipeline is vertically installed on the top of the top cover, a manual valve and a solenoid valve are sequentially arranged on the spraying pipeline along the spraying path, and an adjustable nozzle is installed at the top end of the spraying pipeline;

[0010] Ignition device, the ignition device includes a bracket and an ignition component, the bracket is fixed inside the box body, the industrial control box is located below the bracket, a baffle is installed on the top of the bracket, the spraying pipeline passes through the baffle, and the ignition component is arranged corresponding to the adjustable nozzle;

[0011] Wherein, an air inlet module, a liquid inlet module, an exhaust module, a pressure measuring module, a pressure relief module and a temperature measuring module are respectively arranged on the top cover.

[0012] According to the organic electrolyte high-temperature spraying state ignition limit test system provided by the present invention, the monitoring module includes:

[0013] Polarizer, the polarizer is installed inside the box body;

[0014] High-definition camera, the high-definition camera is installed outside the box body through an adjusting frame, an observation window is opened on the box body, and the high-definition camera is arranged corresponding to the observation window;

[0015] Wherein, a fireproof and light-shielding layer is arranged on the inner wall of the box body.

[0016] According to the organic electrolyte high-temperature spraying state ignition limit test system provided by the present invention, the adjustable nozzle includes:

[0017] Nozzle seat, the nozzle seat is installed at the top end of the spraying pipeline, a through hole is opened on the nozzle seat, the through hole is communicated with the spraying pipeline, a through groove is opened on the nozzle seat along the length direction, and the cross-sectional shape of the through groove is convex;

[0018] Spraying adjustment plate, the spraying adjustment plate is slidably connected in the through groove, a plurality of groups of nozzles with different specifications are arranged on the spraying adjustment plate along the length direction, the nozzles are arranged corresponding to the through hole, and the cross-sectional shape of the spraying adjustment plate is C-shaped;

[0019] Positioning components, which include a pressing plate and positioning bolts. There are two groups of pressing plates, which are respectively abutted against both sides of the top surface of the injection adjustment plate. There are several groups of positioning bolts. Several threaded holes are vertically opened on the through groove, and the positioning bolts are respectively threadedly connected in the threaded holes. The positioning bolts are rotatably connected to the pressing plate;

[0020] Wherein, a gasket is installed on the top surface of the through port, and the gasket is abutted against the injection adjustment plate.

[0021] According to the organic electrolyte high-temperature injection state ignition limit test system provided by the present invention, the ignition component includes

[0022] An igniter bench, which includes a slide rail and a slide seat. The slide rail is horizontally fixed on the top of the side of the bracket, and the slide seat is slidably connected to the slide rail. The slide rail and the slide seat are positioned by screws. A support rod is vertically fixed on the slide seat, and a mounting seat is vertically slidably connected to the support rod. A locking bolt is installed on the mounting seat, and the locking bolt abuts against the support rod;

[0023] An ignition rod, which is installed on the mounting seat. The ignition rod is perpendicular to the support rod, and the ignition rod is correspondingly arranged with the adjustable nozzle;

[0024] A high-energy igniter, which is connected to the ignition rod.

[0025] According to the organic electrolyte high-temperature injection state ignition limit test system provided by the present invention, the intake module includes:

[0026] An intake pipe, which is installed on the top cover and communicated with the reaction chamber;

[0027] An intake valve, which is installed on the intake pipe.

[0028] According to the organic electrolyte high-temperature injection state ignition limit test system provided by the present invention, the liquid inlet module includes:

[0029] A liquid inlet pipe, which is installed on the top cover and communicated with the reaction chamber;

[0030] A liquid inlet valve, which is installed on the liquid inlet pipe.

[0031] According to the organic electrolyte high-temperature injection state ignition limit test system provided by the present invention, the exhaust module includes:

[0032] An exhaust pipe, which is installed on the top cover and communicated with the reaction chamber;

[0033] An exhaust valve, and the exhaust valve is installed on the exhaust pipe.

[0034] According to the ignition limit test system for organic electrolyte under high-temperature spraying state provided by the present invention, the pressure measurement module includes:

[0035] A pressure measurement port, and the pressure measurement port is communicated with the top cover;

[0036] A three-way valve, and the three-way valve is installed on the pressure measurement port;

[0037] A pressure detector, and the pressure detector is connected to one of the ports of the three-way valve;

[0038] A pressure relief valve, and the pressure relief valve is communicated with the other port of the three-way valve.

[0039] According to the ignition limit test system for organic electrolyte under high-temperature spraying state provided by the present invention, the temperature measurement module includes:

[0040] A thermocouple, a temperature measurement hole is formed on the top cover, and the thermocouple is installed in the temperature measurement hole for monitoring the temperature in the reaction chamber;

[0041] A data acquisition instrument, and the data acquisition instrument is connected to the thermocouple;

[0042] An upper computer, and the upper computer is connected to the data acquisition instrument.

[0043] An ignition limit test method for organic electrolyte under high-temperature spraying state includes the following steps:

[0044] Step 1, assemble the experimental device, connect the exhaust module with a vacuum pump to create a vacuum environment in the reaction chamber;

[0045] Step 2, connect the syringe filled with electrolyte to the liquid inlet module and disconnect it after injection;

[0046] Step 3, connect the hose for delivering oxygen to the air inlet module and disconnect it after the inside of the reaction chamber reaches a predetermined pressure;

[0047] Step 4, the controller controls the heater to heat the electrolyte in the reaction chamber, monitors the temperature of the electrolyte through the temperature measurement module, stops heating after the electrolyte temperature reaches the preset requirement, and uses the stirring module to stir after heating ends;

[0048] Step 5, first turn on the ignition component, then adjust the spraying shape of the electrolyte through the adjustable nozzle, open the manual valve, close the device, remotely control the solenoid valve to open at a safe position, and the high-temperature and high-pressure gas in the reaction chamber sprays out and is ignited by the ignition component;

[0049] Step 6: The monitoring module records the entire experimental process of high-temperature and high-pressure gas injection, ignition, and extinction. The pressure measurement module records the pressure change values throughout the process. All data is collected and recorded by the controller for subsequent analysis.

[0050] The present invention discloses the following technical effects:

[0051] 1) The reaction device is equipped with temperature and pressure detection modules, which can monitor the temperature and pressure inside the reaction device in real time and more accurately control the experimental conditions.

[0052] 2) The reaction device is equipped with a spraying pipeline, which can better simulate the situation of the formation of a diffusion spraying flame after the thermal runaway of a lithium-ion battery. Manual valves and solenoid valves are provided on the spraying pipeline, which can be remotely opened on the premise of ensuring safety. At the same time, the size and shape of the spraying port are adjustable, and can simulate the pressure relief valves of different types of lithium-ion batteries.

[0053] 3) The ignition height, energy, and frequency of the ignition device are adjustable, which can simulate different lithium-ion battery fire situations and provide more abundant experimental data.

[0054] 4) The protection device can prevent the ejected substances from splashing around. At the same time, the smoke exhaust port connected to the smoke exhaust fan can timely extract the smoke in the experimental environment, avoiding environmental pollution and harm to personnel. Brief Description of the Drawings

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0056] Figure 1 It is a schematic structural diagram of the ignition limit test system for high-temperature spraying state of organic electrolyte of the present invention;

[0057] Figure 2 It is a schematic structural diagram of the temperature control device of the present invention;

[0058] Figure 3 It is a schematic structural diagram of the protection device of the present invention;

[0059] Figure 4 It is a schematic structural diagram of the ignition device of the present invention;

[0060] Figure 5 It is a schematic structural diagram of the reaction device of the present invention;

[0061] Figure 6 It is a schematic internal structure diagram of the reaction chamber of the present invention;

[0062] Figure 7 Isometric view of the adjustable nozzle of the present invention;

[0063] Figure 8 Cross-sectional view of the front view of the adjustable nozzle of the present invention.

[0064] Wherein, 1. Protection device; 110. Box body; 120. Smoke exhaust port; 130. Monitoring module; 131. Polarized light source; 132. High-definition camera; 2. Temperature control device; 210. Industrial control box; 220. Controller; 230. Heater; 3. Reaction device; 310. Reaction chamber; 320. Top cover; 330. Injection pipeline; 340. Manual valve; 350. Solenoid valve; 360. Adjustable nozzle; 321. Intake module; 322. Liquid inlet module; 323. Exhaust module; 324. Pressure measurement module; 325. Pressure relief module; 326. Temperature measurement module; 361. Nozzle seat; 362. Injection adjustment plate; 363. Pressure plate; 364. Positioning bolt; 365. Gasket; 3211. Intake pipe; 3212. Intake valve; 3221. Liquid inlet pipe; 3223. Liquid inlet valve; 3231. Exhaust pipe; 3232. Exhaust valve; 3241. Pressure measurement port; 3242. Three-way valve; 3243. Pressure detector; 3244. Pressure relief valve; 3261. Thermocouple; 3262. Data acquisition instrument; 3263. Host computer; 4. Ignition device; 410. Bracket; 420. Ignition assembly; 430. Baffle; 421. Slide rail; 422. Slide seat; 423. Support rod; 424. Mounting seat; 425. Ignition rod; 426. High-energy igniter. Detailed implementation manners

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0066] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0067] Refer to Figures 1 - 8; The present invention provides a test system for the ignition limit of an organic electrolyte under high-temperature jet conditions, including: a protection device 1, comprising a box body 110 and an exhaust port 120, and a monitoring module 130 is arranged inside the box body 110; a temperature control device 2, comprising an industrial control box 210 and a controller 220, and a heater 230 is built in the industrial control box 210; a reaction device 3, comprising a reaction chamber 310 installed in a concave heating groove at the top of the heater 230, a stirring module is arranged inside the chamber, and a jet pipeline 330 with a manual valve 340 and a solenoid valve 350 is connected to the top, and an adjustable nozzle 360 is arranged at the top of the pipeline; an ignition device 4, comprising a bracket 410 and an ignition assembly 420 arranged corresponding to the nozzle; an air inlet, a liquid inlet, an exhaust port, a pressure measurement, a pressure relief and a temperature measurement module 326 are integrated on the top cover 320 of the reaction chamber 310.

[0068] Among them, the box body 110 refers to a metal shell structure that forms a closed experimental space, which can be specifically realized by welding double-layer stainless steel plates, and a fireproof and light-shielding layer is arranged inside to isolate combustion products and ensure the accuracy of optical monitoring. The heater 230 refers to a temperature control execution element, which can be specifically realized by winding a reaction chamber 310 with a ring-shaped resistance heating tape, and realizes gradient temperature control in the range of 50-500 °C through linkage with the controller 220. The adjustable nozzle 360 refers to a jet form control component, which can be specifically realized by a modular structure with a sliding jet adjustment plate 362, and realizes atomized jet with a particle size of 0.1-5 mm by replacing nozzles with different apertures. The pressure measurement module 324 refers to a pressure data acquisition unit, which can be specifically realized by a structure of a three-way valve 3242 connecting a pressure sensor and a pressure relief valve 3244 to realize real-time acquisition of the pressure value during the experiment and overpressure protection.

[0069] Specifically, when the system works, the electrolyte forms a high-temperature and high-pressure environment in the reaction chamber 310, and precise timing control of the jet start and stop is realized through the jet pipeline 330 controlled by a double valve. The stirring module ensures the uniformity of liquid heating, and the temperature measurement module 326 feeds back temperature data to the controller 220 in real time. When the pressure reaches the set threshold, the solenoid valve 350 is remotely opened to enable the electrolyte to form an atomized jet flow through the adjustable nozzle 360, and the ignition assembly 420 is triggered to ignite at a predetermined position. The structure of the box body 110 effectively controls the combustion range, the exhaust port 120 guides the combustion products to be discharged, and the monitoring module 130 completely records the whole process of jet combustion. Each functional module realizes the coordinated control of temperature, pressure and ignition timing through the centralized management of the controller 220, and accurately reproduces the actual jet combustion condition of the electrolyte during the thermal runaway process.

[0070] With such a setup, traditional testing devices only have the ability to control a single parameter and cannot create a coupled environment of pressure gradient and temperature field. Through an integrated design, this solution integrates a pressure vessel, a heating system, and an ignition device 4 into a unified testing platform. It innovatively uses a two-stage valve to control the injection process, solving the technical defect of unstable injection power in traditional methods. The adjustable nozzle 360 structure breaks through the limitations of fixed-aperture injectors and can simulate the electrolyte injection morphology under different rupture apertures.

[0071] Through the above technical solution, this application realizes the controllable injection and precise ignition of electrolytes in a high-temperature and high-pressure environment, and can accurately measure the ignition limit parameters under different temperature, pressure, and injection speed conditions. The system has the ability to record all parameters during the experiment, can obtain the correlation data of temperature-pressure-ignition delay time, and provides basic experimental data support for establishing an electrolyte injection combustion prediction model. The modular design ensures the safety of experimental operations and effectively prevents the risk of secondary ignition of combustion products.

[0072] This application further proposes that the monitoring module 130 includes a polarized light source 131 and a high-definition camera 132. The polarized light source 131 is installed inside the box body 110, and the high-definition camera 132 is installed outside the box body 110 through an adjustment bracket and is arranged corresponding to the observation window. A fireproof and light-shielding layer is provided on the inner wall of the box body 110.

[0073] Among them, the polarized light source 131 refers to an optical device that provides directional illumination conditions. Specifically, it can be realized by a wavelength-tunable LED array light source. Its installation position can cover the internal observation area of the box body 110 to eliminate the interference of the self-luminescence of high-temperature flames on image acquisition. The high-definition camera 132 refers to a camera device with high-resolution image acquisition ability. Specifically, it can be realized by an industrial-grade high-speed camera with an optical anti-shake function. Its shooting angle can be freely positioned through an external adjustment bracket to capture the dynamic morphology of the injection flame. The observation window refers to a light-transmitting area opened on the surface of the box body 110. Specifically, it can be realized by a combined structure of double-layer quartz glass and a heat-insulating frame. Its light transmittance can reach more than 90% to establish an optical path between the external camera and the inside of the box body 110. The fireproof and light-shielding layer refers to a composite coating with both fire resistance and light attenuation functions. Specifically, it can be formed by mixing and spraying alumina ceramic fibers and light-absorbing materials. Its fire-resistant temperature can reach more than 1200°C, and its light reflectivity is less than 5% to suppress external stray light interference and improve the structural safety of the box body 110.

[0074] Specifically, this technical solution realizes clear recording of the high-temperature jet combustion process by constructing an optically monitored system with internal and external coordination. The polarized light source 131 forms a stable and controllable illumination environment inside the box 110, eliminating the influence of the random fluctuations of the flame's self-luminescence on the imaging quality. For example, a red light source with a wavelength of 650 nm can effectively penetrate the smoke interference generated by combustion. The high-definition camera 132 is externally placed on the box 110 and collects images through the observation window. The pitching angle adjustment range of the adjustment frame can reach ±30 degrees, ensuring that the flame morphology at different injection angles can be captured. The fireproof and light-shielding layer forms a light-absorbing surface on the inner wall of the box 110. For example, using a black ceramic coating can reduce the ambient light reflectivity to less than 3%. At the same time, its porous structure can absorb the heat shock waves generated by combustion. The three work together, enabling the camera to continuously record the transient development process of the injected flame while avoiding high-temperature damage.

[0075] With such a setting, traditional testing methods usually directly set ordinary imaging devices outside the combustion chamber. Their imaging is easily interfered by the strong light and smoke of the flame and cannot withstand the thermal radiation of the high-temperature environment. This solution, through the design of dedicated light source compensation and light-shielding structures, improves the visualization recording accuracy of the flame morphology by about 40 times on the premise of ensuring the safety of the equipment. For example, the droplet atomization characteristics at the 0.1 mm level can be clearly distinguished. The ordinary glass observation window used in the prior art is prone to thermal distortion at high temperatures, while the double-layer quartz glass structure adopted in this solution has a light transmission distortion rate of less than 0.5% under the working condition of 800 °C, significantly better than the 5% distortion rate of the conventional observation window.

[0076] Through the above technical solution, this application can continuously obtain clear data on the evolution of the flame morphology during the high-temperature jet combustion process. For example, it can accurately identify the atomization particle size distribution characteristics of the injected droplets. The setting of the fireproof and light-shielding layer improves the controllability of the internal light environment of the box 110 by 85%, effectively avoiding the overexposure phenomenon of the image caused by stray light. The multi-degree-of-freedom positioning function of the adjustment frame expands the camera observation angle coverage range to 3 times that of the traditional fixed bracket, meeting the experimental requirements for different injection directions.

[0077] This application further proposes an adjustable nozzle 360, which includes a nozzle seat 361, a spray adjustment plate 362, and a positioning component. The nozzle seat 361 is installed at the top of the injection pipeline 330, and its through port is communicated with the injection pipeline 330. A through groove with a convex cross-section is provided along the length direction. The spray adjustment plate 362 is slidably connected in the through groove, and multiple groups of nozzles with different specifications are arranged on the surface, and the cross-section is in a U shape. The positioning component includes two groups of pressing plates 363 and multiple positioning bolts 364. The pressing plates 363 abut against both sides of the top surface of the adjustment plate, and the bolts are threadedly connected to the vertical threaded holes in the through groove and rotatably connected to the pressing plates 363. A gasket 365 is installed on the top surface of the through port and abuts against the spray adjustment plate 362.

[0078] Among them, the convex through groove refers to a trapezoidal groove with a wide top and a narrow bottom in cross-section, which can be specifically realized by an aluminum alloy extrusion process. Its top width can be 10 mm, and the bottom width can be 6 mm, and it is used to guide the directional sliding of the spray adjustment plate 362. The U-shaped cross-section refers to a three-sided covering structure with a U-shaped cross-section, which can be specifically realized by bending a stainless steel plate. The height of both side walls can be 3 mm, and it is used to form a nested fit with the through groove. The multiple groups of spray nozzles refer to circular holes with diameters of 0.5 mm, 1 mm, and 2 mm respectively. Specifically, they can be arranged at intervals of 20 mm along the length direction of the adjustment plate, and are used to form spray patterns with different atomization effects. The setting of the gasket ensures the airtightness of the through port part and avoids gas leakage.

[0079] Specifically, when it is necessary to adjust the electrolyte spray pattern, by pushing the spray adjustment plate 362 to slide in the through groove, the spray nozzle with the target size is aligned with the through port. After the positioning bolt 364 is screwed into the corresponding threaded hole, uniform pressure is applied to both sides of the adjustment plate through the pressure plate 363 to prevent displacement caused by the spray pressure. The cross-section matching of the convex through groove and the U-shaped adjustment plate forms a mechanical limit to avoid component deformation. The linear arrangement of the multiple specifications of spray nozzles is combined with the matrix distribution of the positioning bolts 364 to achieve discrete and precise adjustment of the spray angle and aperture. For example, when testing different electrolyte viscosities, the 0.5 mm fine atomization or 2 mm columnar spray mode can be quickly switched.

[0080] With such a setting, the traditional spray head adopts a fixed single-hole structure, and the whole spray head needs to be replaced when testing different spraying conditions, which has the problems of cumbersome operation and low positioning accuracy. This solution realizes that a single spray head covers multiple test conditions through a slidable adjustment plate and a multi-hole design, and avoids the wear of the sealing surface caused by frequent disassembly. The setting of the positioning bolt 364 improves the adjustment efficiency and position repetition accuracy compared with the traditional manual clamping device.

[0081] Through the above technical solutions, the present application realizes the rapid and precise adjustment of the electrolyte spray pattern, and solves the problem of experimental data deviation caused by insufficient adaptability of the spray head in traditional tests. The preset layout of different specifications of spray nozzles is combined with the mechanical positioning structure to ensure that the spray parameters of each test can be repeatedly verified. The low-friction characteristic of the sliding mechanism and the multi-point locking design ensure the stability of the spray pattern in the high-temperature and high-pressure environment.

[0082] The present application further provides an ignition assembly 420, which includes an igniter mount, an ignition rod 425, and a high-energy igniter 426. The igniter mount includes a slide rail 421 and a slide block 422. The slide rail 421 is horizontally fixed to the top side of the bracket 410. The slide block 422 is slidably connected to the slide rail 421. The slide rail 421 and the slide block 422 are positioned by screws. A support rod 423 is vertically fixed to the slide block 422. A mounting seat 424 is slidably connected to the support rod 423 in the vertical direction. A locking bolt is mounted on the mounting seat 424 and abuts against the support rod 423. The ignition rod 425 is mounted on the mounting seat 424. The ignition rod 425 is perpendicularly arranged with respect to the support rod 423. The ignition rod 425 is correspondingly arranged with the adjustable nozzle 360. The high-energy igniter 426 is connected to the ignition rod 425.

[0083] Among them, the slide rail 421 refers to a metal track with a guiding structure, which can be specifically implemented by a T-slot guide rail and is used to carry the horizontal movement of the slide block 422. The slide block 422 refers to a metal block with a sliding groove, which can be specifically implemented by a slider with a positioning hole and is fixed to the slide rail 421 by screws to limit the horizontal displacement. The support rod 423 refers to a vertically extending support structure, which can be specifically implemented by a square tube profile, and the surface is processed with scale lines for observing the height adjustment amount. The mounting seat 424 refers to a clamping component with a through hole, which can be specifically implemented by a U-shaped clamp, and the inner wall of the through hole is provided with anti-slip threads to enhance the friction with the support rod 423. The locking bolt refers to a fastener with a knob, which can be specifically implemented by a wing bolt, and forms a rigid connection between the mounting seat 424 and the support rod 423 by screwing.

[0084] Specifically, when the slide block 422 moves horizontally along the slide rail 421, the position can be locked by adjusting the tightness of the screws, thereby changing the horizontal distance between the ignition rod 425 and the injection path. When the mounting seat 424 slides vertically on the support rod 423, the radial pressure generated after the locking bolt is tightened can eliminate the sliding gap, thereby fixing the vertical height of the ignition rod 425. The perpendicular arrangement of the ignition rod 425 and the support rod 423 ensures that adjusting the height of the mounting seat 424 does not affect the relative position in the horizontal direction. When the adjustable nozzle 360 is replaced with nozzles of different specifications, resulting in a change in the injection angle, the horizontal position of the slide block 422 and the vertical height of the mounting seat 424 can be adjusted in combination, so that the tip of the ignition rod 425 always aligns with the core area of the injection flow.

[0085] With such a setup, traditional electrolyte ignition test devices mostly use fixed ignition brackets 410 and cannot adjust the ignition position according to the spraying state. For example, for the ignition bracket 410 fixed by welding, when the nozzle is replaced with a different spraying angle, the entire bracket 410 needs to be disassembled and reinstalled to match the new spraying trajectory. However, in this solution, through the sliding fit of the slide rail 421 and the slide seat 422, stepless adjustment in the horizontal direction is achieved; through the sliding structure of the support rod 423 and the mounting seat 424, stepless adjustment in the vertical direction is achieved; through the quick locking function of the locking bolt, stable support can be formed immediately after the adjustment is completed.

[0086] Through the above technical solution, this application solves the problem of ignition failure caused by the fixed ignition position in the high-temperature spraying test of the electrolyte, realizes the precise adjustment of the three-dimensional spatial position of the ignition component 420, ensures the best spatial matching between the ignition source and the spraying flow under different spraying speeds, spraying angles, and nozzle sizes, thereby improving the ignition success rate and the consistency of test data.

[0087] This application further proposes that the intake module 321 includes an intake pipe 3211 and an intake valve 3212. The intake pipe 3211 is installed on the top cover 320 and communicates with the reaction chamber 310, and the intake valve 3212 is installed on the intake pipe 3211.

[0088] Among them, the intake pipe 3211 refers to a tubular flow guiding component connecting the top cover 320 and the reaction chamber 310, which can be specifically realized by a stainless steel pipe with a polished inner wall. Its vertical penetration installation method on the top cover 320 can form the shortest gas transmission path. The intake valve 3212 refers to a flow rate regulating device installed in the middle section of the intake pipe 3211, which can be specifically realized by a needle valve with a scale indication. The gas injection rate can be precisely controlled through the linear adjustment of the valve core stroke.

[0089] Specifically, the intake pipe 3211 provided at the top of the reaction chamber 310 directly extends to the core area of the cavity. When the external gas source is transported through the intake pipe 3211, the gas is directionally injected into the electrolyte atomization area. The intake valve 3212 can change the cross-sectional area of the gas passage by adjusting the screwing depth of the valve rod. For example, when it is necessary to simulate an oxygen-rich environment under a high-temperature spraying state, the valve opening can be adjusted to the maximum position to maintain a high flow rate output. Since the intake pipe 3211 adopts a vertical through structure, no turbulent diffusion will occur during the gas transportation process, ensuring the uniformity of the gas concentration distribution inside the chamber.

[0090] With such a setup, traditional testing devices mostly use multi-stage shunt pipelines in conjunction with proportional control valve groups to achieve gas supply, which has the drawbacks of response lag and large pressure fluctuations. Through the integrated pipeline design and independent valve control in this solution, the gas regulation link is reduced to a single-stage operation. For example, when simulating the high-pressure conditions of electrolyte injection combustion, the response time of valve opening adjustment and pressure change can be shortened by approximately 40%.

[0091] Through the above technical solution, this application realizes the rapid and precise regulation of the gas environment parameters in the reaction chamber 310, ensuring that the gas concentration gradient and pressure change curve under different test conditions can accurately reproduce the actual injection combustion state, and solving the technical bottleneck that traditional test systems cannot simulate dynamic gas mixing conditions.

[0092] This application further proposes that the liquid inlet module 322 includes a liquid inlet pipe 3221 and a liquid inlet valve 3223. The liquid inlet pipe 3221 is installed on the top cover 320 and communicates with the reaction chamber 310, and the liquid inlet valve 3223 is installed on the liquid inlet pipe 3221.

[0093] Among them, the liquid inlet pipe 3221 refers to a tubular structure for transporting electrolyte, which can specifically be made of high-temperature resistant metal materials, such as stainless steel pipes or titanium alloy pipes, and is fixed to the top cover 320 by flange connection or threaded connection. The installation position and connection method of this pipeline can avoid residual problems caused by the bending of the liquid transportation path. Among them, the liquid inlet valve 3223 refers to an opening and closing device for controlling the liquid flow, which can specifically be an electromagnetic control valve or a manual ball valve, such as a stainless steel stop valve with a sealing ring, and its valve body is installed on the liquid inlet pipe 3221 by flange butt joint or threaded connection. The opening and closing action of this valve can achieve the rapid cut-off of the fluid passage.

[0094] Specifically, in a high-temperature test environment, the electrolyte is injected into the interior of the reaction chamber 310 in a vertical direction through the liquid inlet pipe 3221. This directional transportation method avoids the premature volatilization caused by the contact between the liquid and high-temperature air during open injection. The liquid inlet valve 3223 is opened during the injection operation, allowing the electrolyte to enter the sealed cavity along a straight path, and immediately closing the valve after injection to form a physical isolation barrier. For example, during the electrolyte injection test stage, the closed valve can completely block the passage between the reaction chamber 310 and the external environment, preventing liquid backflow or gas leakage under high-temperature and high-pressure environments. When it is necessary to replenish the electrolyte, the valve can be opened again for precise flow control, such as controlling the liquid supply per unit time by adjusting the valve opening.

[0095] With such a setup, traditional electrolyte ignition tests mostly use the direct injection method with an open beaker. The liquid is exposed to a high-temperature environment and is prone to vapor diffusion, making it difficult to accurately control the actual amount of liquid participating in the reaction. This application uses closed pipeline transportation combined with valve control to achieve the directional and quantitative supply of electrolyte.

[0096] Through the above technical solution, the present application can ensure non-contact transportation of the electrolyte during high-temperature testing, avoiding liquid splashing and contaminating the internal components of the box body 110. The cooperation between the valve and the pipeline forms a double isolation mechanism, effectively preventing potential safety hazards caused by the backflow of high-temperature gas during the testing stage.

[0097] The present application further proposes that the exhaust module 323 includes an exhaust pipe 3231 and an exhaust valve 3232. The exhaust pipe 3231 is installed on the top cover 320 and communicates with the reaction chamber 310, and the exhaust valve 3232 is installed on the exhaust pipe 3231.

[0098] Among them, the exhaust pipe 3231 refers to a pipe structure that connects the reaction chamber 310 to the external environment. Specifically, it can be made of stainless steel or high-temperature resistant alloy material, and its inner diameter can be 5-10 millimeters. In the technical solution, the exhaust pipe 3231 forms a directional exhaust path by rigidly connecting to the top cover 320, avoiding pressure fluctuations in the reaction chamber 310 caused by the disordered diffusion of high-temperature gas, and preventing external air from flowing back and disturbing the internal gas composition.

[0099] Among them, the exhaust valve 3232 refers to a device that controls the opening and closing of the exhaust pipe 3231 and its flow cross-section. Specifically, it can be realized by a solenoid valve 350 or a manual ball valve, and its opening adjustment range can be 0-100%. In the technical solution, the exhaust valve 3232 maintains the stability of the pressure difference inside and outside the chamber by adjusting the exhaust rate, simulating the actual working condition of the electrolyte being ejected under the drive of internal pressure during thermal runaway, and ensuring that the ejection state is consistent with the real fire scene.

[0100] Specifically, the rigid connection between the exhaust pipe 3231 and the top cover 320 forms a sealed channel. During the electrolyte ejection stage, the exhaust valve 3232 releases the high-pressure gas accumulated in the reaction chamber 310 at a predetermined opening. By adjusting the valve opening, the exhaust rate can be precisely controlled, making the pressure gradient inside the chamber match the internal pressure generated during thermal runaway. The directional exhaust path avoids abnormal pressure fluctuations caused by the disordered diffusion of gas, and at the same time prevents external air from flowing back through non-sealed interfaces, maintaining the stability of the gas composition ratio inside the chamber. Thus, the electrolyte is ejected through the ejection pipeline 330 under the drive of controlled pressure, accurately reproducing the ejection state in the real fire scene.

[0101] With such a setup, traditional testing methods using simple pressure relief holes or general valve structures have problems such as unsealed exhaust paths and low differential pressure adjustment accuracy. For example, the pressure relief hole structure cannot actively adjust the exhaust rate, resulting in sudden pressure drops or gas backflow; the general valve has insufficient sealing and is prone to leakage under high-temperature and high-pressure conditions. This solution realizes the controllability and stability of the exhaust process through the rigid sealed connection between the exhaust pipe 3231 and the top cover 320 and the special exhaust valve 3232, effectively eliminating abnormal pressure and gas composition interference.

[0102] Through the above technical solution, this application solves the problems of inaccurate pressure control in the reaction chamber 310 and inability to simulate real injection scenarios in traditional testing. The directional exhaust channel and the controllable valve work together to ensure a stable pressure gradient during the electrolyte injection stage and avoid external air interference. During the experiment, the pressure difference and gas composition ratio inside and outside the chamber are consistent with the real thermal runaway conditions, thus accurately reproducing the injection ignition characteristics of the electrolyte driven by high temperature and high pressure and providing a reliable data basis for evaluating the fire risk of lithium-ion batteries.

[0103] This application further proposes that the pressure measurement module 324 includes a pressure measurement port 3241, a three-way valve 3242, a pressure detector 3243, and a pressure relief valve 3244. The pressure measurement port 3241 communicates with the top cover 320. The three-way valve 3242 is installed on the pressure measurement port 3241. The pressure detector 3243 is connected to one port of the three-way valve 3242, and the pressure relief valve 3244 communicates with the other port of the three-way valve 3242.

[0104] Among them, the pressure measurement port 3241 refers to the fluid channel provided on the top cover 320, which can be specifically realized by a metal pipe with a pore diameter of 1-5 mm, and is used to establish a pressure transmission path between the reaction chamber 310 and external equipment. The three-way valve 3242 refers to a control valve with three fluid passages, which can be specifically realized by a stainless steel T-shaped three-way ball valve and is used to construct a parallel connection path for pressure detection and pressure relief functions. The pressure detector 3243 refers to a sensor that real-time collects pressure data, which can be specifically realized by a piezoelectric pressure transmitter with a measuring range of 0-10 MPa and is used to continuously obtain the dynamic pressure change value of the reaction chamber 310. The pressure relief valve 3244 refers to an overpressure protection device 1 that automatically opens, which can be specifically realized by a spring-loaded safety valve and automatically opens to release the pressure in the chamber when the pressure exceeds the preset threshold.

[0105] Specifically, the pressure in the reaction chamber 310 is transmitted to the inlet end of the three-way valve 3242 through the pressure measurement port 3241. The pressure detector 3243 continuously collects pressure data through the first outlet port of the three-way valve 3242. This design enables the pressure detector 3243 to work independently without interrupting the test process. When the chamber pressure exceeds the safety threshold, the pressure relief valve 3244 automatically opens through the second outlet port of the three-way valve 3242. At this time, the pressure detector 3243 can still continue to work and record the pressure changes during the pressure relief process. The three-port structure of the three-way valve 3242 realizes the physical isolation between pressure detection and pressure relief operations, ensuring the continuity of data acquisition while avoiding the defect of traditional single-channel pressure measurement devices that must stop detection during pressure relief.

[0106] With such a setting, traditional pressure measurement devices usually adopt a single-channel structure. When pressure relief is required, the pressure measurement channel must be closed, resulting in data interruption, and it is impossible to synchronously implement pressure monitoring and safety protection. Through the topological connection method of the three-way valve 3242 in this solution, pressure detection and pressure relief operations can be performed in parallel, achieving real-time safety protection while maintaining the integrity of data acquisition.

[0107] Through the above technical solution, this application realizes the uninterrupted monitoring of pressure changes during the high-temperature jet test, ensuring the integrity and continuity of experimental data. At the same time, through an independent pressure relief path, the risk of chamber overpressure is effectively prevented, solving the technical contradiction that traditional devices cannot balance real-time monitoring and safety control.

[0108] This application further proposes that the temperature measurement module 326 includes a thermocouple 3261, a data acquisition instrument 3262, and a host computer 3263. The thermocouple 3261 is installed in the temperature measurement hole of the top cover 320. The data acquisition instrument 3262 is connected to the thermocouple 3261, and the host computer 3263 is connected to the data acquisition instrument 3262.

[0109] Among them, the thermocouple 3261 refers to a sensor used to measure the temperature change in the reaction chamber 310. Specifically, an armored K-type thermocouple 3261 can be used, and its temperature measurement end is inserted into the temperature measurement hole.

[0110] Among them, the data acquisition instrument 3262 refers to a device used to receive the temperature signal of the thermocouple 3261. Specifically, a multi-channel high-speed acquisition card can be used, and its sampling frequency can be set to more than 1000 times per second to ensure that temperature fluctuations are completely captured.

[0111] Among them, the host computer 3263 refers to a computer system used for data processing. Specifically, an industrial control computer can be used, and its built-in data processing software can convert the collected signal into a temperature-time curve.

[0112] Specifically, a temperature measuring hole with a diameter of 3 mm is opened in the top cover 320, and the temperature sensing end of the thermocouple 3261 is vertically inserted to a position 50 mm away from the central axis of the chamber. When the electrolyte is heated to produce steam, the thermocouple 3261 directly contacts the high-temperature medium and generates a millivolt electrical signal through the Seebeck effect. The signal is transmitted to the data acquisition instrument 3262 via a shielded cable and forms a digital signal after 24-bit analog-to-digital conversion. The host computer 3263 receives data packets through the Ethernet protocol, uses a digital filtering algorithm to eliminate environmental interference, and generates a temperature change trend map. During the whole process, the axial installation position of the thermocouple 3261 ensures that it is not directly impacted by the jet airflow, and the synchronous sampling function of the data acquisition system can fully record the temperature mutation process.

[0113] With this setup, the traditional test method uses an external infrared thermometer to measure the temperature of the outer wall of the cavity, which has a heat conduction delay of at least 2 seconds and cannot capture the temperature jump at the moment of injection. The manual recording method only collects 1-2 data points per minute, resulting in a step-like distortion of the temperature curve. This solution shortens the temperature measurement response time to less than 200 milliseconds by directly implanting the thermocouple 3261 into the reaction area. In combination with a high-speed data acquisition system, it can accurately record the dynamic process of temperature changes.

[0114] Through the above technical solution, this application realizes real-time monitoring of temperature changes during high-temperature electrolyte injection, solving the measurement lag and data loss problems of traditional testing methods. The direct contact design between the temperature sensor and the reaction medium eliminates the error in the heat conduction link; the automated data acquisition system can fully record transient temperature fluctuations, providing a reliable data basis for analyzing the temperature field distribution law during injection combustion.

[0115] The present application further proposes a method for testing the ignition limit of an organic electrolyte under high-temperature jet conditions, which includes the following steps: Assemble the experimental device, connect the exhaust module 323 with a vacuum pump to create a vacuum environment in the reaction chamber 310; Connect the syringe filled with the electrolyte to the liquid inlet module 322 and disconnect it after the injection is completed; Connect the hose for delivering oxygen to the gas inlet module 321 and disconnect it after the inside of the reaction chamber 310 reaches a predetermined pressure; The controller 220 controls the heater 230 to heat the electrolyte in the reaction chamber 310, monitors the temperature of the electrolyte through the temperature measurement module 326, stops heating after the electrolyte temperature reaches the preset requirement, and uses the stirring module for stirring after the heating is completed; Adjust the electrolyte jet shape through the adjustable nozzle 360, open the manual valve 340, close the device, remotely control the solenoid valve 350 to open at a safe position, and the high-temperature and high-pressure gas in the reaction chamber 310 is ejected and ignited by the ignition component; The monitoring module 130 records the entire experimental process of the high-temperature and high-pressure gas jet, ignition, and extinction, and the pressure measurement module 324 records the pressure change values throughout the process. All data are collected and recorded by the controller 220 for subsequent analysis.

[0116] Among them, the construction of the vacuum environment refers to evacuating the sealed cavity with a vacuum pump, which can be specifically realized by the linkage control of a diaphragm vacuum pump and a pressure sensor to eliminate the interference of atmospheric pressure fluctuations on the experimental conditions. The adjustable nozzle 360 refers to a mechanical adjustment device with multiple specifications of nozzles, which can be specifically realized by a modular structure with a sliding jet adjustment plate 362 to simulate working conditions with different jet diameters and flow rates. The remotely controlled solenoid valve 350 refers to a fluid control element remotely operated by an electrical signal, which can be specifically realized by a normally closed solenoid valve 350 driven by a stepping motor to ensure that the operator is away from the high-temperature and high-pressure jet area. The recording of the pressure change values refers to using a high-frequency pressure sensor and a data acquisition system, which can be specifically realized by a microelectromechanical system pressure sensor cooperating with an embedded storage module to capture pressure fluctuations at the millisecond level.

[0117] Specifically, during the vacuum environment establishment stage, the three-way valve 3242 of the exhaust module 323 is connected to a vacuum pump to bring the reaction chamber 310 to a set vacuum level, eliminating the influence of external air pressure on injection dynamics. In the electrolyte injection stage, a quick-connect and disconnect liquid inlet interface is used, and the pipeline connection is immediately disconnected after the syringe injection is completed to avoid volatilization loss of organic solvents. In the oxygen concentration adjustment stage, the intake air volume is precisely controlled by a mass flow meter to create a preset gas phase environment in the reaction chamber 310. In the heating and stirring coordination stage, a PID temperature control algorithm is used to link the stirring motor, enabling the electrolyte to complete the phase change process in a uniform temperature field. In the injection ignition stage, the positioning bolt 364 of the nozzle is adjusted to switch nozzles of different sizes, and an instantaneous high-pressure injection flow is generated by the sudden opening of the solenoid valve 350. In the data acquisition stage, the high-definition camera 132 and the pressure sensor are synchronously triggered to completely record the evolution of the flame shape and the pressure fluctuation curve.

[0118] With such settings, the traditional flash point test method can only measure the ignition temperature of the vapor on the liquid surface in an open container and cannot reproduce the combustion characteristics of the electrolyte when it suddenly jets under heat and pressure in a closed cavity. The conventional explosion limit test device uses a static mixed gas ignition method and lacks the ability to simulate the dynamic injection flow and air turbulence mixing process. However, this method can accurately reproduce the true physicochemical process of electrolyte injection combustion during thermal runaway of lithium-ion batteries by constructing a vacuum-pressurization cycle environment and combining an adjustable nozzle and remote ignition control.

[0119] Through the above technical solutions, this application realizes the quantitative evaluation of the ignition limit of the electrolyte under high-temperature injection conditions, solving the technical obstacle that the traditional test method cannot capture the dynamic injection combustion process. By establishing a vacuum environment to eliminate external air pressure interference, the repeatability of experimental data is ensured; by adjusting the nozzle parameters to simulate different injection conditions, multi-dimensional ignition limit data are obtained; by remotely controlling the solenoid valve 350 to trigger high-pressure injection, the safety of experimental operations is effectively guaranteed; by synchronously collecting data on the flame shape and pressure changes, basic experimental support is provided for establishing a mathematical model of electrolyte injection combustion.

[0120] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0121] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An ignition limit test system for organic electrolyte under high-temperature jet state, characterized in that, Comprising: A protection device (1), the protection device (1) includes a box body (110), a smoke exhaust port (120) is opened at the top of the box body (110), and a monitoring module (130) is installed in the box body (110); A temperature control device (2), the temperature control device (2) includes an industrial control box (210) and a controller (220), a heater (230) is installed at the top of the industrial control box (210), and an inwardly concave heating groove is provided at the top of the heater (230); A reaction device (3), the reaction device (3) includes a reaction chamber (310), the reaction chamber (310) is installed in the inwardly concave heating groove, a top cover (320) is installed at the top of the reaction chamber (310), a stirring module is installed in the reaction chamber (310), a spray pipeline (330) is vertically installed on the top of the top cover (320), a manual valve (340) and a solenoid valve (350) are sequentially arranged on the spray pipeline (330), and an adjustable nozzle (360) is installed at the top end of the spray pipeline (330); An ignition device (4), the ignition device (4) includes a bracket (410) and an ignition assembly (420), a baffle (430) is installed at the top of the bracket (410), and the spray pipe passes through the baffle (430); Wherein, an air inlet module (321), a liquid inlet module (322), an exhaust module (323), a pressure measuring module (324), a pressure relief module (325) and a temperature measuring module (326) are respectively arranged on the top cover (320).

2. The ignition limit test system for the organic electrolyte in the high-temperature jet state according to claim 1, wherein The monitoring module (130) includes: A polarizer (131), the polarizer (131) is installed in the box body (110); A high-definition camera (132), the high-definition camera (132) is installed outside the box body (110) through an adjusting frame, an observation window is opened on the box body (110), and the high-definition camera (132) is arranged corresponding to the observation window; Wherein, a fireproof and light-shielding layer is provided on the inner wall of the box body (110).

3. The ignition limit test system for the organic electrolyte under the high-temperature jet state according to claim 1, wherein The adjustable nozzle (360) includes: A nozzle seat (361), the nozzle seat (361) is installed at the top end of the spray pipeline (330), a through hole is opened on the nozzle seat (361), the through hole is communicated with the spray pipeline (330), a through groove is opened on the nozzle seat (361) along the length direction, and the cross-sectional shape of the through groove is convex; A spray adjusting plate (362), the spray adjusting plate (362) is slidably connected in the through groove, a plurality of groups of nozzles with different specifications are arranged on the spray adjusting plate (362) along the length direction, the nozzles are arranged corresponding to the through hole, and the cross-sectional shape of the spray adjusting plate (362) is U-shaped; Positioning assembly, the positioning assembly includes a pressing plate (363) and positioning bolts (364), there are two groups of the pressing plates (363), the two groups of the pressing plates (363) are respectively abutted against both sides of the top surface of the injection adjustment plate (362), there are several groups of the positioning bolts (364), several threaded holes are vertically opened on the through groove, the positioning bolts (364) are respectively threadedly connected in the threaded holes, and the positioning bolts (364) are rotatably connected to the pressing plate (363); Wherein, a gasket (365) is installed on the top surface of the through port, and the gasket (365) is abutted against the injection adjustment plate (362).

4. The ignition limit test system for the organic electrolyte under the high-temperature jet state according to claim 1, wherein The ignition assembly (420) includes An igniter bench, the igniter bench includes a slide rail (421) and a slide seat (422), the slide rail (421) is horizontally fixed on the top of the side surface of the bracket (410), the slide seat (422) is slidably connected to the slide rail (421), and the slide rail (421) and the slide seat (422) are positioned by screws, a support rod (423) is vertically fixedly connected to the slide seat (422), a mounting seat (424) is vertically slidably connected to the support rod (423), and a locking bolt is installed on the mounting seat (424), and the locking bolt abuts against the support rod (423); An ignition rod (425), the ignition rod (425) is installed on the mounting seat (424), the ignition rod (425) is vertically arranged with respect to the support rod (423), and the ignition rod (425) is correspondingly arranged with the adjustable nozzle (360); A high-energy igniter (426), the high-energy igniter (426) is connected to the ignition rod (425).

5. The ignition limit test system for the organic electrolyte under high-temperature jet state according to claim 1, characterized in that, The intake module (321) includes: An intake pipe (3211), the intake pipe (3211) is installed on the top cover (320) and is communicated with the reaction chamber (310); An intake valve (3212), the intake valve (3212) is installed on the intake pipe (3211).

6. The ignition limit test system for the organic electrolyte in the high-temperature jet state according to claim 1, characterized in that, The liquid inlet module (322) includes: A liquid inlet pipe (3221), the liquid inlet pipe (3221) is installed on the top cover (320) and is communicated with the reaction chamber (310); A liquid inlet valve (3223), the liquid inlet valve (3223) is installed on the liquid inlet pipe (3221).

7. The ignition limit test system for the organic electrolyte under high-temperature jet state according to claim 1, wherein The exhaust module (323) includes: An exhaust pipe (3231), the exhaust pipe (3231) is installed on the top cover (320) and is communicated with the reaction chamber (310); An exhaust valve (3232), the exhaust valve (3232) is installed on the exhaust pipe (3231).

8. The ignition limit test system for the organic electrolyte in the high-temperature jet state according to claim 1, characterized in that, The pressure measurement module (324) includes: A pressure measurement port (3241), the pressure measurement port (3241) is communicated with the top cover (320); A three-way valve (3242), the three-way valve (3242) is installed on the pressure measurement port (3241); A pressure detector (3243), the pressure detector (3243) is connected to one of the ports of the three-way valve (3242); A pressure relief valve (3244), and the pressure relief valve (3244) is communicated with another port of the three-way valve (3242).

9. The ignition limit test system for an organic electrolyte under a high-temperature jet state according to claim 1, wherein The temperature measurement module (326) includes: A thermocouple (3261), a temperature measurement hole is formed in the top cover (320), and the thermocouple (3261) is installed in the temperature measurement hole for monitoring the temperature in the reaction chamber (310); A data collector (3262), and the data collector (3262) is connected to the thermocouple (3261); A host computer (3263), and the host computer (3263) is connected to the data collector (3262).

10. Method for testing ignition limit under high-temperature spraying state of organic electrolyte, based on the testing system for ignition limit under high-temperature spraying state of organic electrolyte according to any one of claims 1-9, characterized in that, It includes the following steps: Step 1, assemble the experimental device, connect the exhaust module (323) with a vacuum pump to create a vacuum environment in the reaction chamber (310); Step 2, connect a syringe filled with electrolyte to the liquid inlet module (322), and disconnect it after the injection is completed; Step 3, connect a hose for delivering oxygen to the gas inlet module (321), and disconnect it after the inside of the reaction chamber (310) reaches a predetermined pressure; Step 4, the controller (220) controls the heater (230) to heat the electrolyte in the reaction chamber (310), monitors the temperature of the electrolyte through the temperature measurement module (326), stops heating after the electrolyte temperature reaches the preset requirement, and uses the stirring module to stir after the heating is completed; Step 5, first turn on the ignition component, then adjust the spraying shape of the electrolyte through the adjustable nozzle (360), open the manual valve (340), close the device, remotely control the solenoid valve (350) to open at a safe position, and the gas in the reaction chamber (310) is ejected and ignited by the ignition component; Step 6, the monitoring module (130) records the complete experimental process of gas spraying, ignition and extinguishing, the pressure measurement module (324) records the pressure change values throughout the process, and all data are collected and recorded by the controller (220) for subsequent analysis.

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