CN210572642U - Battery thermal safety performance detection platform - Google Patents
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- CN210572642U CN210572642U CN201920808345.8U CN201920808345U CN210572642U CN 210572642 U CN210572642 U CN 210572642U CN 201920808345 U CN201920808345 U CN 201920808345U CN 210572642 U CN210572642 U CN 210572642U
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Abstract
The utility model provides a battery thermal safety performance detection platform, which comprises a user side, a heating device, a simulation battery box and a thermal safety performance evaluation system; the simulation battery box has two states of closing and opening; under the condition that the simulated battery box is opened, the heating device heats the tested battery, and the smoke collection device collects smoke released after the tested battery is heated; the smoke collection device is provided with a first collection port communicated with the smoke data collection device, and the smoke data collection device collects smoke through the first collection port; flue gas data acquisition device handles the flue gas of gathering and gives the user side with data transmission, and thermal radiation data acquisition device sets up and gathers thermal radiation data and send for the user side on receiving test battery at least level and two vertical directions the utility model discloses provide thermal safety performance evaluation platform, simple structure easily assembles the maintenance, and the testing process is directly perceived, and data are accurate. The simulation battery box has the function of high-strength protection and can provide two environmental requirements of opening and closing.
Description
Technical Field
The utility model relates to a battery safety capability test technical field is a battery thermal safety performance testing platform particularly.
Background
With the rapid development of new energy automobile and electric vehicle industries, the battery capacity is larger and larger, more and more fire accidents are caused by the battery, the thermal safety of the battery is concerned widely, and how to rapidly detect and extinguish the battery fire is also an important subject in the field of fire safety. In the current research aiming at the fire safety of the batteries, the fire safety evaluation of various batteries is not comprehensive. In the patent aspect, the relevant utility model or utility model patent has: the utility model discloses a lithium ion battery thermal safety performance prediction method (application number 200610130589.2), under the condition of providing actual battery, through testing less positive negative pole and electrolyte sample, reasoning reaction mechanism, utilizing mechanism function and combining material property parameter of material, establish a mathematical model for describing battery temple thermal production and flow direction. It cannot detect the thermal radiation range of the battery under heating, the components of the fumes generated, etc.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to lack the test device to the thermal radiation scope of battery under the condition of being heated, the flue gas component of production among the prior art, provide a battery thermal safety performance testing platform.
The utility model discloses an above-mentioned technical problem is solved to following technical scheme:
a battery thermal safety performance detection platform comprises a user side, a heating device, a simulation battery box (13) and a thermal safety performance evaluation system;
the simulation battery box (13) has a closed state and an open state; the heating device is placed in the simulation battery box (13), and the tested battery is fixed above the heating device;
the thermal safety performance evaluation system comprises a smoke collection device, a smoke data acquisition device and a thermal radiation data acquisition device; in the open state of the simulation battery box (13), the heating device heats the tested battery, and the smoke collection device collects smoke released after the tested battery is heated; the smoke collection device is provided with a first collection port (701) communicated with the smoke data collection device, and the smoke data collection device collects smoke through the first collection port (701); the smoke data acquisition device is used for processing the acquired smoke and sending the data to the user side, and the thermal radiation data acquisition device is arranged in at least two horizontal and vertical directions of the tested battery to acquire thermal radiation data and send the thermal radiation data to the user side.
Preferably, the fume collecting device comprises a fume collecting hood, a fume exhaust pipeline and an exhaust fan; the smoke collecting hood is connected with the exhaust fan through a smoke exhaust pipeline; the smoke collecting hood is positioned above the simulated battery box (13); the first collecting port (701) is arranged on the smoke exhaust pipeline.
Preferably, the flue gas data acquisition device comprises a flow meter, a first air pump (703) and a gas analyzer; the gas first acquisition port (701), the flowmeter, the first air pump (703) and the gas analyzer are sequentially connected through a pipeline; the gas analyzer is in communication with a user terminal.
Preferably, the thermal safety performance evaluation system further comprises an off-line measurement gas collection device; a second collection port (801) is further formed in the smoke exhaust pipeline; the off-line measurement gas collection device comprises a second gas pump (802) and a sampling bag (804); the second collection port (801), the second air pump (802) and the sampling bag (804) are connected in sequence through pipelines.
Preferably, the thermal radiation data acquisition device comprises a thermal radiation flow meter (901) and an acquisition module; a plurality of radiant heat flow meters (901) are sequentially arranged on the side and above the tested battery from near to far, the radiant heat flow meters (901) are respectively connected with a collection module, and the collection module sends collected data to a user side.
Preferably, the thermal radiation data acquisition device further comprises two bundles of thermocouples which are respectively arranged on the tested battery in a lateral horizontal arrangement mode and a top vertical arrangement mode, and the two bundles of thermocouples are communicated with the user side through the temperature data acquisition module.
Preferably, the simulated battery box (13) comprises a protective frame (2) and a sealing plate (16), wherein the protective frame (2) is a cubic steel frame formed by welding steel materials; the sealing plate (16) is detachably fixed on the side wall and the top wall of the steel skeleton to form a sealing state.
The utility model has the advantages that:
the utility model provides a platform set thermal safety performance aassessment, simple structure, easily equipment maintenance, the testing process is directly perceived, and data is accurate. The simulation battery box has two states of opening and sealing, can also provide the demand of different environment when having high-strength safeguard function, realizes the test demand to different grade type batteries, different performance.
The battery thermal safety test is used for obtaining the fire hazard of different types of batteries in various heating environments and evaluating the effectiveness of various detection and fire extinguishing measures in battery fire prevention and control, and has important significance for understanding the occurrence mechanism and development rule of battery fire and improving the thermal safety of the batteries.
The utility model discloses under well battery heat safety nature ability evaluation system can realize different heating conditions, through the flue gas of collection cigarette device collection different time quantum, obtain heat radiation range data through the bolometric flowmeter to realize dangerous evaluation and analysis of battery deflagration, can obtain heat release rate, hazardous characterization key parameter such as poison gas release amount.
Drawings
Fig. 1 is a schematic structural diagram of a detection platform according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a detection platform according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a component for simulating battery box sealing in the detection platform in embodiment 1 and embodiment 2 of the present invention.
Detailed Description
In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:
as shown in fig. 1, a platform for testing thermal safety performance of battery includes a user terminal, a heating plate, a simulation battery box, a thermal safety performance evaluation system, and a mobile rack 4.
The movable support 4 is provided with universal wheels which can move randomly. The simulation battery box 13 is fixed on the movable support, the simulation battery box 13 is moved to the position right below the smoke collecting hood in the test, and the heating plate is started to continuously heat the battery until the battery is detonated.
The simulated battery box 13 can realize two states of closing and opening so as to meet different testing requirements. The concrete implementation structure is as follows:
as shown in fig. 3, the simulated battery box 13 includes a protection frame 2, a sealing plate 16 and a fixing frame 18, the protection frame 2 plays a role in protecting the battery from detonation, and a hollow grid steel framework formed by welding profile steel is mainly adopted to prevent the damage of splashed fragments to surrounding personnel or equipment during battery detonation. The steel skeleton adopts horizontal muscle welding of indulging to form square fretwork, and the closing plate 16 is the corrosion resistant plate, and every corrosion resistant plate seals fixedly with every fretwork blank form cooperation. Four corners of each hollow space position are provided with four screw holes 1909, 1910, 1911 and 1912 for fixing a stainless steel plate 16, flexible sealing strips 17 are pasted on the periphery of the stainless steel plate 16, four screw holes 1905, 1906, 1907 and 1908 are also arranged at positions with the same four corners, when the stainless steel plate 16 is modified, the stainless steel plate 16 is attached to the space position of the protection frame 2, the fixing frame 18 covers the stainless steel plate, the screw holes of the battery detonation protection frame 2, the stainless steel plate 16 and the fixing frame 18 are aligned, and the battery detonation protection frame 2 is fixed and sealed by screws to become a closed simulated battery box 13. A part of the stainless steel plate 16 is reserved with a closable pipeline insertion hole for arranging various detection and fire extinguishing test systems in the battery box. The tested battery 1 and the heating plate 3 are arranged at the center of the bottom of the simulation battery box 13.
When the device is used in an open state, the protective frame 2 is directly adopted, and the stainless steel plate and the fixing frame 18 are sequentially arranged when a test environment needs to be closed.
The heating device is placed in the simulation battery box 13, and the heating plate generally adopts resistance wire to generate heat to the test battery. According to the demand, can heat the different positions of battery, this embodiment adopts to place the battery under test in heating device's top, tests its bottom mode of heating.
The thermal safety performance evaluation system is used for testing the simulated battery box in an open state, namely, a sealing plate 16 outside the simulated battery box is detached, the protection frame 2 is reserved, and the tested battery and the heating device are placed in the protection frame 2. The thermal safety performance evaluation system comprises a smoke collection device, a smoke data acquisition device, an off-line measurement gas acquisition device and a thermal radiation data acquisition device; the heating device heats the tested battery, and the smoke collecting device collects smoke released after the tested battery is heated.
The smoke collecting device comprises a smoke collecting hood 5, a smoke exhaust pipeline 6 and an exhaust fan (not shown in the figure); the fume collecting hood 5 is connected with an exhaust fan through a fume exhaust pipeline 6; the fume collecting hood 5 is positioned above the simulated battery box. The smoke exhaust duct 6 is provided with a first collecting port 701 and a second collecting port 801.
The flue gas data acquisition device comprises a flow meter 702, a first air pump 703 and a gas analyzer 704; the first acquisition port 701, the flowmeter 702, the first air pump 703 and the gas analyzer 704 are connected in sequence through a pipeline; the gas analyzer 704 sends the analysis result to the user side. The method is characterized in that an oxygen consumption method principle is utilized, smoke generated by battery detonation is collected by a smoke collecting hood 5 in a test and is extracted through a smoke exhaust pipeline 6, a first collecting port 701 is arranged on a straight pipe section of the smoke exhaust pipeline 6, the first collecting port 701 is connected with a first air pump 703 through a gas collecting pipeline, a detected gas sample is collected and measured in the test, the gas flow is measured through a flowmeter 702, the collected gas sample is input into a gas analyzer 704 in real time, based on the oxygen consumption method principle, namely, for most combustible materials, the heat released when 1kg of oxygen is consumed is 13.1MJ, the gas analyzer can measure and calculate the heat release rate at different moments in the test, data is input into a processor 11, and a curve of the heat release rate changing along with time can be detected on a display 12 in real time. The gases required for heat release rate calculation include mainly oxygen, carbon monoxide and carbon dioxide.
The gas analyzer 704 measures the heat release rate of the collected gas, and the measurement formula is as follows:
wherein the content of the first and second substances,
for the heat release rate kW, E is the amount of heat released per 1kg of oxygen consumed,
and
the mass flow rates of oxygen in the initial air and the post-combustion gas, respectively, were kg/s.
The off-line measurement gas collecting device comprises a second gas pump 802 and a sampling bag 804; the second collection port 801, the second air pump 802 and the sampling bag 804 are connected in sequence through pipelines. The gas sample is collected and sent to a physical and chemical center, so that the fire gas concentration which is difficult to measure on line in real time and is generated by chlorides, sulfides and the like in the combustion process is measured.
The opening and closing of the first air pump 703 and the second air pump 802 can be manually controlled according to actual test requirements.
The thermal radiation data acquisition device comprises a radiant heat flow meter 901 and a radiant heat flow meter acquisition module 902; the side and the top of the tested battery are sequentially provided with a plurality of radiant heat flow meters 901 from near to far, the radiant heat flow meters 901 are respectively connected with a radiant heat flow meter acquisition module 902, and the radiant heat flow meter acquisition module 902 sends acquired data to a user side.
The thermal radiation data acquisition device further comprises two thermocouples 1001 and 1002 which are respectively arranged on the lateral side of the tested battery and are vertically arranged above the tested battery, the two thermocouples 1001 and 1002 are connected with a temperature module 1003 through a compensation wire, and the temperature module 1003 sends acquired data to a user side. Three radiant heat flow meters are arranged at different positions outside the protective frame 2, measuring signals are transmitted to the temperature module 1003 in the test, radiant heat flux received at positions with different distances from the deflagration battery can be obtained after conversion, measured values can be transmitted to the processor 11 in real time, and a radiant heat flux change curve can be obtained at the display 12.
The user side comprises a processor 11 and a display 12, wherein the processor 11 is respectively communicated with the temperature module 1003, the bolometer acquisition module 902 and the data module 1603 to acquire various acquired data, perform processing actions such as data storage and the like, and then display the result on the display 12.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that it further includes a fire extinguishing system and an early fire warning system. Fire suppression systems need to be tested in a simulated battery closed state. The fire extinguishing system comprises a fire extinguishing device and a fire extinguishing efficiency evaluation mechanism.
The fire extinguishing device comprises a pipe network type fire extinguishing test system and a suspension type fire extinguishing test system, the pipe network type fire extinguishing test system can be used for detecting the effectiveness of fire extinguishing systems such as water mist and foam, and the suspension type fire extinguishing system can be used for detecting the effectiveness of fire extinguishing systems such as superfine dry powder (convenient to clean). The pipe network type fire extinguishing test system of the embodiment is composed of a fire extinguishing pipe network 1413, gas storage bottles 1401 and 1402, fire extinguishing medium nozzles 1414, 1415 and 1416, and flow meters 1403, 1404, 1405, 1406 and 1407, valves 1408, 1409, 1410, 1411 and 1412 arranged on a main pipe network and three branch pipe networks. The three branch pipes penetrate through the simulation battery box 13 according to different heights and enter the closed cavity, a nozzle is arranged at the end part of each branch pipe in the simulation battery box 13, a valve is arranged on a branch pipe network connected with each nozzle, and the valves are arranged outside the simulation battery box 13 and can control the opening and closing of the different nozzles through the valves in a test, so that the influence of the releasing heights of different fire extinguishing media on the fire extinguishing effect is analyzed. In the test of the suspension type fire extinguishing system, the fire extinguishing agent storage tanks are hung 1501 and 1502 on hooks at the top of the battery box, and the fire extinguishing agent storage tanks can be automatically or manually opened through an external device in a fire disaster.
The fire extinguishing efficiency evaluation mechanism tests the effects of different fire extinguishing mechanisms and is characterized mainly by temperature measurement values near a tested battery. The thermocouple bundle 1004 arranged near the battery 1 is connected to the temperature module 1003 through a compensating lead, and the temperature module 1003 converts thermocouple information into temperature information and transmits the temperature information to a user terminal. The thermocouple bundle 1004 may be fixed to the protection frame 2 or fixed by other fittings inside the battery box. When the battery is heated and burned, the temperature nearby can be gradually increased, the space temperature can be gradually reduced after the fire extinguishing agent is released, and the temperature can be suddenly reduced during fire extinguishing. Therefore, the flameout time can be determined through the temperature curve. The plurality of thermocouple bundles are arranged at different heights, so that the temperatures of different heights of the battery accessories are detected, and the fire extinguishing efficiency is detected in multiple stages. The thermocouple bundles are fixed in a conventional mode, and are convenient to detach and replace. The plurality of thermocouples are arranged at different heights according to the detection requirement.
The fire early warning system comprises detectors fixed at different heights in a simulation battery box, wherein the detectors are temperature detectors, smoke detectors or gas detectors, or any two of the detectors are combined. Multiple probes communicate with the user side through data block 1603. Two different height departments in the battery box are provided with a detector installing port 1601, 1602 respectively, install the detector at detector installing port 1601, 1602 department, and the detector is connected with data module 1603, and data module 1603 is connected with the user. Once the detector gives an alarm in the test, an alarm signal is input and recorded through the signal transmission line and the data module 1603, and the user side displays the alarm signal and the time, so that the early detection effect of the detector at different heights on the battery fire can be detected.
In the concrete work, when a battery detection fire extinguishing system detection test and a fire early warning system test are carried out, firstly, the simulation battery box is assembled and sealed, and part of the pipe network needs to penetrate through the stainless steel plate, so that the simulation battery box needs to be installed again. And after all the batteries are installed, the heating device is turned on to heat the batteries. Each detector in the early fire warning system begins to detect temperatures of different heights, and if the temperatures reach a threshold value, an alarm signal is sent out and displayed in a display. The battery is continuously heated until the battery catches fire, one of the height nozzles of one of the fire extinguishers is started at the moment, the battery in a combustion state is extinguished, the fire extinguishing systems with different media and heights are selected in each test, and the temperature is acquired through a plurality of thermocouples arranged on the edge of the battery and at different heights, so that the influence of the releasing heights of different fire extinguishing media on the fire extinguishing effect is analyzed.
If the thermal safety performance evaluation system is performed, the sealing plate of the dummy battery box needs to be removed to reach an open state. Then, the heating device is started to heat the battery, the battery is heated to release gas, and the first air pump or the second air pump is started or 2 air pumps are started simultaneously according to the detection requirement to analyze the collected gas. Meanwhile, radiant heat fluxes received at different distances of the battery are collected by the plurality of thermal radiation flow meters in the horizontal and vertical directions, measured values can be transmitted to the processor in real time, and a radiant heat flux change curve can be obtained at the display.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a battery thermal safety performance testing platform which characterized in that: the system comprises a user side, a heating device, a simulation battery box (13) and a thermal safety performance evaluation system;
the simulation battery box (13) has a closed state and an open state; the heating device is placed in the simulation battery box (13), and the tested battery is fixed above the heating device;
the thermal safety performance evaluation system comprises a smoke collection device, a smoke data acquisition device and a thermal radiation data acquisition device; in the open state of the simulation battery box (13), the heating device heats the tested battery, and the smoke collection device collects smoke released after the tested battery is heated; the smoke collection device is provided with a first collection port (701) communicated with the smoke data collection device, and the smoke data collection device collects smoke through the first collection port (701); the smoke data acquisition device is used for processing the acquired smoke and sending the data to the user side, and the thermal radiation data acquisition device is arranged in at least two horizontal and vertical directions of the tested battery to acquire thermal radiation data and send the thermal radiation data to the user side.
2. The platform of claim 1, wherein the platform comprises: the smoke collecting device comprises a smoke collecting hood, a smoke exhaust pipeline and an exhaust fan; the smoke collecting hood is connected with the exhaust fan through a smoke exhaust pipeline; the smoke collecting hood is positioned above the simulated battery box (13); the first collecting port (701) is arranged on the smoke exhaust pipeline.
3. The platform of claim 2, wherein the platform comprises: the smoke data acquisition device comprises a flowmeter, a first air pump (703) and a gas analyzer; the gas first acquisition port (701), the flowmeter, the first air pump (703) and the gas analyzer are sequentially connected through a pipeline; the gas analyzer is in communication with a user terminal.
4. A platform according to claim 2 or 3, wherein: the thermal safety performance evaluation system further comprises an off-line measurement gas collecting device; a second collection port (801) is further formed in the smoke exhaust pipeline; the off-line measurement gas collection device comprises a second gas pump (802) and a sampling bag (804); the second collection port (801), the second air pump (802) and the sampling bag (804) are connected in sequence through pipelines.
5. The platform of any one of claims 1 to 3, wherein: the thermal radiation data acquisition device comprises a thermal radiation flow meter (901) and an acquisition module; a plurality of radiant heat flow meters (901) are sequentially arranged on the side and above the tested battery from near to far, the radiant heat flow meters (901) are respectively connected with a collection module, and the collection module sends collected data to a user side.
6. The platform of claim 5, wherein the platform comprises: the thermal radiation data acquisition device further comprises two bundles of thermocouples which are respectively arranged on the tested battery in a lateral horizontal arrangement mode and a top vertical arrangement mode, and the two bundles of thermocouples are communicated with the user side through the temperature data acquisition module.
7. The platform of claim 6, wherein the platform comprises: the simulated battery box (13) comprises a protective frame (2) and a sealing plate (16), wherein the protective frame (2) is a cubic steel frame formed by welding steel materials; the sealing plate (16) is detachably fixed on the side wall and the top wall of the steel skeleton to form a sealing state.
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| CN201920808345.8U CN210572642U (en) | 2019-05-30 | 2019-05-30 | Battery thermal safety performance detection platform |
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| CN201920808345.8U CN210572642U (en) | 2019-05-30 | 2019-05-30 | Battery thermal safety performance detection platform |
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