Flue gas diffusion test device and flue gas diffusion test method

Abstract

The invention relates to a flue gas diffusion test device and a flue gas diffusion test method.The flue gas diffusion test device comprises a cabin, a partition plate is installed in the cabin and divides the cabin into an equipment chamber and a laboratory, and a signal acquisition device is installed in the equipment chamber; the plurality of groups of battery supporting assemblies are all mounted in the laboratory, and the plurality of groups of battery supporting assemblies are arranged at intervals along the extension direction of the laboratory; the top surface and the bottom surface of the laboratory are each provided with a plurality of first combustible gas composite sensors, the first combustible gas composite sensors are used for collecting the concentration of flue gas in the laboratory, and the first combustible gas composite sensors are all electrically connected with the signal collecting device. The top surface and the bottom surface of the laboratory are respectively provided with a plurality of first combustible gas composite sensors, so that the first combustible gas composite sensors can be used for collecting the flue gas concentrations of a plurality of positions in the laboratory at different time when a flue gas diffusion test of a fire disaster is carried out.

Description

Technical Field

[0001] The present application relates to the field of lithium battery energy storage technology, and in particular to a smoke diffusion test device and a smoke diffusion test method. Background Art

[0002] With the rapid development of the lithium battery energy storage industry, the scale of lithium battery energy storage systems has expanded rapidly in recent years. At present, the fire protection problem of lithium battery energy storage systems is prominent. When the fire involves the battery and induces thermal runaway of the battery, it is difficult to control and cause serious consequences.

[0003] The smoke generated by battery thermal runaway has high temperature, fast generation speed and complex composition. If the combustible smoke cannot be effectively controlled, it will cause dangerous situations such as personal poisoning and gas explosion. Timely detection of combustible smoke can reduce the losses caused by battery thermal runaway. However, there is no systematic design scheme in the relevant technology to explore the smoke diffusion law after thermal runaway occurs in the energy storage battery compartment. Summary of the invention

[0004] The present application provides a smoke diffusion test device and a smoke diffusion test method, which can solve the technical problem that there is no systematic design scheme in the related art to explore the smoke diffusion law after thermal runaway occurs in the energy storage battery compartment.

[0005] In a first aspect, an embodiment of the present application provides a smoke diffusion test device, comprising: a cabin, a partition plate installed in the cabin, the partition plate divides the cabin into an equipment room and a laboratory, a signal acquisition device is installed in the equipment room; multiple groups of battery support assemblies, the battery support assemblies are all installed in the laboratory, and the multiple groups of battery support assemblies are arranged at intervals along the extension direction of the laboratory; multiple first combustible gas composite sensors are installed on the top and bottom surfaces of the laboratory, the first combustible gas composite sensors are used to collect the smoke concentration in the laboratory, and the first combustible gas composite sensors are all electrically connected to the signal acquisition device.

[0006] In combination with the first aspect, in one embodiment, each group of the battery support assemblies includes two battery support racks, the two battery support racks are arranged at intervals along the extension direction of the laboratory, and a battery placement space is formed between the two battery support racks; at least two of the first combustible gas composite sensors are installed in each of the battery placement spaces, and at least two of the first combustible gas composite sensors are respectively installed on the top and bottom surfaces of the laboratory.

[0007] In combination with the first aspect, in one embodiment, the smoke diffusion test device also includes a thermal runaway experiment package, which is installed in the battery placement space; a plurality of second combustible gas composite sensors are respectively installed on the top and bottom surfaces of the laboratory at the battery placement spaces corresponding to the thermal runaway experiment packages, and the second combustible gas composite sensors are all electrically connected to the signal acquisition device, and the second combustible gas composite sensors and the first combustible gas composite sensors in the battery placement space where the thermal runaway experiment package is installed are spaced apart in a direction perpendicular to the spacing direction of the multiple groups of battery support frames.

[0008] In combination with the first aspect, in one embodiment, a third combustible gas composite sensor is also installed at the side wall of the laboratory corresponding to the battery placement space where the thermal runaway experiment package is installed; the third combustible gas composite sensor is located between the first combustible gas composite sensors on the top and bottom surfaces of the laboratory.

[0009] In combination with the first aspect, in one implementation, a thermal runaway inducing device is installed in the thermal runaway test package.

[0010] In combination with the first aspect, in one implementation, each of the first combustible gas composite sensors is spaced apart from a side wall of the laboratory.

[0011] In combination with the first aspect, in one embodiment, the partition plate is provided with a smoke exhaust port, and the side of the laboratory away from the equipment room is also provided with an air inlet.

[0012] In the second aspect, an embodiment of the present application provides a smoke diffusion test method, which adopts the above-mentioned smoke diffusion test device, and the smoke diffusion test method includes the following steps: installing multiple first combustible gas composite sensors in the laboratory respectively; installing a thermal runaway test package on a group of battery support components, and triggering thermal runaway of the thermal runaway test package; using a signal acquisition device to continuously collect data from each first combustible gas composite sensor until the fire in the laboratory is extinguished, and obtaining the smoke diffusion law in the laboratory.

[0013] In combination with the second aspect, in one embodiment, each group of the battery support assemblies includes two battery support racks, and a battery placement space is formed between the two battery support racks. The thermal runaway test package is installed in a group of battery support assemblies, including: installing the thermal runaway test package in the battery placement space, and installing a plurality of second combustible gas composite sensors at the battery installation spaces where the thermal runaway test packages are installed on the top and bottom surfaces of the laboratory; and installing a third combustible gas composite sensor at the battery placement spaces where the thermal runaway test packages are installed on the side walls of the laboratory.

[0014] In combination with the second aspect, in one embodiment, the signal acquisition device is used to continuously collect data from each first combustible gas composite sensor until the fire in the laboratory is extinguished, so as to obtain the smoke diffusion law in the laboratory, including: establishing a position coordinate system of the first combustible gas composite sensor, the second combustible gas composite sensor and the third combustible gas composite sensor in the laboratory; obtaining the concentration change values ​​of the smoke concentration of the first combustible gas composite sensor at each position, the second combustible gas composite sensor at each position and the third combustible gas composite sensor over time; calculating the smoke diffusion speed in different directions of the laboratory using the concentration change values; and interpolating in the position coordinate system based on the smoke diffusion speed to obtain the smoke diffusion law in the laboratory.

[0015] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0016] By installing multiple groups of battery support components in the laboratory to simulate the layout scenario of the lithium battery energy storage system, multiple first combustible gas composite sensors are installed on the top and bottom of the laboratory respectively. When conducting a fire smoke diffusion test, the first combustible gas composite sensors can be used to collect smoke concentrations at multiple locations in the laboratory at different times. The collected smoke concentrations can be transmitted to a signal acquisition device, which solves the technical problem that there is no systematic design solution in the related technology to explore the smoke diffusion law after thermal runaway occurs in the energy storage battery compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a smoke diffusion test device provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the arrangement structure of the laboratory bottom surface combustible gas composite sensor provided in the embodiment of the present application;

[0020] Figure 3 A schematic diagram of the arrangement structure of the laboratory top surface combustible gas composite sensor provided in the embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the layout structure of the laboratory side combustible gas composite sensor provided in an embodiment of the present application.

[0022] In the figure:

[0023] 1. Partition plate; 11. Smoke exhaust port;

[0024] 2. Equipment room;

[0025] 3. Laboratory; 31. Battery support frame; 311. Battery placement space; 32. First combustible gas composite sensor; 33. Second combustible gas composite sensor; 34. Third combustible gas composite sensor; 35. Air inlet;

[0026] 4. Thermal runaway test package. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The embodiment of the present application provides a smoke diffusion test device, which can solve the technical problem that there is no systematic design solution in the related art to explore the smoke diffusion law after thermal runaway occurs in the energy storage battery compartment.

[0029] See also Figure 1 As shown, a smoke diffusion test device provided by an embodiment of the present application may include: a cabin, a partition plate 1 is installed in the cabin, the partition plate 1 divides the cabin into an equipment room 2 and a laboratory 3, and a signal acquisition device is installed in the equipment room 2; multiple groups of battery support assemblies, the battery support assemblies are all installed in the laboratory 3, and multiple groups of the battery support assemblies are arranged at intervals along the extension direction of the laboratory 3; multiple first combustible gas composite sensors 32 are installed on the top and bottom surfaces of the laboratory 3, the first combustible gas composite sensors 32 are used to collect the smoke concentration in the laboratory 3, and the first combustible gas composite sensors 32 are electrically connected to the signal acquisition device. The partition plate 1 can be made of fire-resistant and flame-retardant materials, such as adding rock wool in the middle of the steel plate, the first combustible gas composite sensor 32 is electrically connected to the signal acquisition device, and a line perforation can be opened on the partition plate 1, and the line perforation can be close to the top surface of the laboratory 3. Installing multiple groups of battery support assemblies in the laboratory 3 can simulate the layout scene of the lithium battery energy storage system to enhance the reference value of the test results.

[0030] In the embodiment of the present application, multiple groups of battery support components are installed in the laboratory 3 to simulate the layout scenario of the lithium battery energy storage system. The battery support components can be used to place the battery pack. In the embodiment of the present application, they can be used to place the thermal runaway test package 4. Multiple first combustible gas composite sensors 32 are installed on the top and bottom of the laboratory 3 respectively. When conducting the smoke diffusion test of the fire, the first combustible gas composite sensor 32 can be used to collect the smoke concentration at multiple locations in the laboratory 3 at different times, and the collected smoke concentration can be transmitted to the signal acquisition device. In the embodiment of the present application, multiple first combustible gas composite sensors 32 are installed on the top and bottom of the laboratory 3 respectively. According to the characteristics of high-temperature smoke gathering at the top in the fire research and the unique characteristics of smoke sinking in the battery fire, the smoke and smoke diffusion data can be collected respectively through the multi-parameter sensor to obtain the smoke diffusion characteristics of the top surface diffusion, bottom surface diffusion and vertical diffusion in the cabin. It solves the technical problem that there is no systematic design scheme in the related art to explore the smoke diffusion law after thermal runaway occurs in the energy storage battery cabin.

[0031] In some optional embodiments, each group of the battery support assembly includes two battery support racks 31, and the two battery support racks 31 are spaced apart along the extension direction of the laboratory 3, and a battery placement space 311 is formed between the two battery support racks 31; at least two of the first combustible gas composite sensors 32 are installed in each of the battery placement spaces 311, and at least two of the first combustible gas composite sensors 32 are respectively installed on the top and bottom surfaces of the laboratory 3. The battery support members can all adopt a steel frame, which is more similar to the actual structure in the lithium battery energy storage system, and the material is determined according to the weight requirements of the battery pack. The battery support members can all include multiple columns and horizontal brackets perpendicular to the columns. The two ends of the horizontal brackets are respectively fixed at different positions. At this time, the vertical column bears a load of not less than 10 tons, and the horizontal bracket bears a load of not less than 1 ton. In the embodiment of the present application, a first combustible gas composite sensor 32 is placed on the top and bottom surfaces of the laboratory 3 corresponding to each battery placement space 311, so that the smoke concentrations at different times in different battery placement spaces 311 in the laboratory 3 can be collected, while reducing the test cost as much as possible and obtaining as much test data as possible, thereby enhancing the accuracy of the test results. In some other embodiments, two or more first combustible gas composite sensors 32 can also be placed on the top and bottom surfaces of the laboratory 3 corresponding to each battery placement space 311.

[0032] In some optional embodiments, the smoke diffusion test device may also include a thermal runaway test package 4, which is installed in the battery placement space 311; the top and bottom surfaces of the laboratory 3 are respectively installed with a plurality of second combustible gas composite sensors 33 at the battery placement space 311 corresponding to the thermal runaway test package 4, and the second combustible gas composite sensors 33 are electrically connected to the signal acquisition device, and the second combustible gas composite sensors 33 and the first combustible gas composite sensors 32 in the battery placement space 311 where the thermal runaway test package 4 is installed are arranged in a spacing direction perpendicular to the spacing direction of the multiple battery support frames 31. It should be understood that the thermal runaway test package 4 can use a conventional battery pack, but a thermal runaway inducing device such as heating or overcharging is installed in the conventional battery pack so that the thermal runaway test package 4 can spontaneously ignite during the experiment. The thermal runaway test package 4 can be installed in any battery placement space 311, and the installation positions of the plurality of second combustible gas composite sensors 33 can be determined according to the installation position of the thermal runaway test package 4. Preferably, the multiple first combustible gas composite sensors 32 installed on the top surface of the laboratory 3 can be located on the same straight line, and the multiple first combustible gas composite sensors 32 installed on the bottom surface of the laboratory 3 can also be located on the same straight line. The straight line formed by the multiple first combustible gas composite sensors 32 installed on the top surface of the laboratory 3 and the straight line formed by the multiple first combustible gas composite sensors 32 installed on the bottom surface of the laboratory 3 can both be along the length direction of the laboratory 3, or along the spacing direction between the laboratory 3 and the equipment room 2; further, the multiple second combustible gas composite sensors 33 installed on the top surface of the laboratory 3 can be connected to one of the first combustible gas composite sensors 32 installed on the top surface of the laboratory 3 to form a straight line, and the straight line can be considered to be along the width direction of the laboratory 3, so that the first combustible gas composite sensors 32 The straight line connecting the multiple second combustible gas composite sensors 33 is perpendicular to the straight line connecting the multiple first combustible gas composite sensors 32; similarly, the multiple second combustible gas composite sensors 33 installed on the bottom surface of the laboratory 3 can also be connected to one of the first combustible gas composite sensors 32 installed on the bottom surface of the laboratory 3 to form a straight line, and the straight line can be considered to be along the width direction of the laboratory 3, so that the straight line connecting the first combustible gas composite sensor 32 and the multiple second combustible gas composite sensors 33 is perpendicular to the straight line connecting the multiple first combustible gas composite sensors 32. The above-mentioned setting method can use the multiple first combustible gas composite sensors 32 and the multiple second combustible gas composite sensors 33 to respectively calculate the diffusion speed of smoke on the bottom and top surfaces of the laboratory 3, thereby constructing the smoke field in the bottom space and the smoke field in the top space respectively.

[0033] Preferably, the cables of the first combustible gas composite sensor 32 , the second combustible gas composite sensor 33 and the third combustible gas composite sensor 34 are all sealed with high temperature resistant aluminum foil tape and connected to the signal acquisition device in the equipment room 2 .

[0034] In some optional embodiments, a third combustible gas composite sensor 34 may be installed at the battery placement space 311 on the side wall of the laboratory 3 corresponding to the thermal runaway experiment package 4; the third combustible gas composite sensor 34 is located between the first combustible gas composite sensor 32 on the top and bottom surfaces of the laboratory 3. In the embodiment of the present application, the first combustible gas composite sensor 32, the second combustible gas composite sensor 33 and the third combustible gas composite sensor 34 may all be the same combustible gas composite sensor, and all have the function of collecting CO, H 2 , VOC gas concentration, temperature and smoke functions, except that the first combustible gas composite sensor 32 is installed on the top and bottom surfaces of the laboratory 3, and its position is usually determined and does not change, while the installation positions of the second combustible gas composite sensor 33 and the third combustible gas composite sensor 34 change with the position of the thermal runaway experiment package 4. Preferably, a first combustible gas composite sensor 32 is installed on the top and bottom surfaces of each battery placement space 311, respectively, and the third combustible gas composite sensor 34 is installed between the two first combustible gas composite sensors 32, and the two first combustible gas composite sensors 32 and the third combustible gas composite sensor 34 are on the same axis, and the smoke diffusion speed of the smoke along the height direction of the laboratory 3 can be calculated through the two first combustible gas composite sensors 32 and the third combustible gas composite sensor 34. By combining the calculated smoke diffusion velocity along the height direction of the laboratory 3 with the constructed bottom space smoke field and the constructed top space smoke field, the diffusion law of the smoke field in the entire laboratory 3 can be obtained. The distribution and diffusion trend of the smoke in the laboratory 3 can be more intuitively displayed through the fitted smoke field diffusion law, providing an important basis for experimental safety assessment and emergency plan formulation. In the embodiment of the present application, by installing the first combustible gas composite sensor 32 and the third combustible gas composite sensor 34 in a battery placement space 311 on the same axis, the smoke concentration in the height direction between the two first combustible gas composite sensors 32 of the laboratory 3 can be measured more accurately, and the measured data can be guaranteed to be consistent in space as much as possible, which is convenient for subsequent data analysis and processing.

[0035] In some optional embodiments, a thermal runaway inducing device is installed in the thermal runaway test package 4. The thermal runaway test package 4 can be a common battery pack on the market. The thermal runaway inducing device installed therein can be activated to induce thermal runaway of the battery pack and then overall combustion when a test is required. By installing the thermal runaway inducing device, the thermal runaway process of the battery pack under abnormal conditions can be simulated more accurately, providing a basis for obtaining the smoke diffusion law in the laboratory 3 later.

[0036] In some optional embodiments, each of the first combustible gas composite sensors 32 is spaced apart from the side wall of the laboratory 3. That is, each of the first combustible gas composite sensors 32 is spaced apart from the side wall of the laboratory 3 along a length direction perpendicular to the laboratory 3, and the spacing is preferably 10 cm. By setting the spacing, the influence of the side wall of the laboratory 3 on the data collection of the first combustible gas composite sensor 32 can be effectively avoided or reduced, thereby enhancing the accuracy of the test results.

[0037] In some optional embodiments, the partition plate 1 is provided with a smoke exhaust port 11, and the laboratory 3 is also provided with an air inlet 35 on the side away from the equipment room 2. It should be understood that when the smoke exhaust port 11 is provided on the partition plate 1, a pipe can be connected to the smoke exhaust port 11 so that the pipe connects the smoke exhaust port 11 with the outside world. To further simulate the layout scene of the lithium battery energy storage system, the air inlet 35 can be set at a position close to the bottom surface of the laboratory 3, and two air inlet louvers are installed at the air inlet 35. The smoke exhaust port 11 on the partition plate 1 can be close to the top surface of the laboratory 3, and a smoke exhaust fan is installed in the smoke exhaust port 11. Furthermore, the cabin in the embodiment of the present application adopts a 20-foot container, the width of the equipment room 2 along the length direction of the cabin is set to 1m, and the signal acquisition device is installed in the equipment room 2. In some other embodiments, the smoke exhaust port 11 can also be set on other side walls of the laboratory 3 so that the smoke exhaust port 11 can connect the laboratory 3 with the outside world.

[0038] The embodiment of the present application also provides a smoke diffusion test method, which uses the above-mentioned smoke diffusion test device. The smoke diffusion test method may include the following steps:

[0039] S1: Install a plurality of first combustible gas composite sensors 32 in the laboratory 3 respectively.

[0040] S2: Install the thermal runaway test package 4 on a set of battery support assemblies, and trigger the thermal runaway of the thermal runaway test package 4. The thermal runaway test package 4 is now supported on two battery support frames 31 of one set of battery support assemblies and is located in the battery placement space 311.

[0041] S3: Continuously collect data from each first combustible gas composite sensor 32 using a signal acquisition device until the fire in the laboratory 3 is extinguished, and obtain the smoke diffusion law in the laboratory 3. The data collected from each first combustible gas composite sensor 32 may include respectively collected CO, H2, VOC gas concentration, smoke and temperature data, so as to respectively obtain the diffusion law characteristics of different gases in the smoke.

[0042] In some optional embodiments, each group of the battery support assembly may include two battery support racks 31, and a battery placement space 311 is formed between the two battery support racks 31. The thermal runaway test package 4 is installed in a group of battery support assemblies, including: installing the thermal runaway test package 4 in the battery placement space 311, and installing a plurality of second combustible gas composite sensors 33 at the battery installation spaces where the thermal runaway test package 4 is installed on the top and bottom surfaces of the laboratory 3; installing the third combustible gas composite sensor 34 at the battery placement space 311 where the thermal runaway test package 4 is installed on the side wall of the laboratory 3. It should be understood that the thermal runaway test package 4 can be installed on the battery support rack 31 first, and then the second combustible gas composite sensor 33 and the third combustible gas composite sensor 34 can be installed at the corresponding positions respectively, or the installation position of the thermal runaway test package 4 can be pre-set first, and the second combustible gas composite sensor 33 and the third combustible gas composite sensor 34 can be installed at the corresponding positions respectively, and then the thermal runaway test package 4 can be fixed.

[0043] In some optional embodiments, the method of continuously collecting data from each first combustible gas composite sensor 32 by using a signal acquisition device until the fire in the laboratory 3 is extinguished, and obtaining the smoke diffusion law in the laboratory 3 may include:

[0044] A position coordinate system of the first combustible gas composite sensor 32, the second combustible gas composite sensor 33, and the third combustible gas composite sensor 34 in the laboratory 3 is established. The origin of the coordinate system can be set first, and the origin can be one of the first combustible gas composite sensors 32 installed on the bottom surface of the laboratory 3. Specifically, it can be the first combustible gas composite sensor 32 installed on the bottom surface of the laboratory 3 in the battery placement space 311 where the thermal runaway experiment package 4 is installed. With the first combustible gas composite sensor 32 as the origin, the installation positions of the first combustible gas composite sensor 32, the second combustible gas composite sensor 33, and the third combustible gas composite sensor 34 can be conveniently marked in the coordinate system.

[0045] Furthermore, the concentration change values ​​of the smoke concentration of the first combustible gas composite sensor 32 at each position, the second combustible gas composite sensor 33 at each position, and the third combustible gas composite sensor 34 over time are respectively obtained.

[0046] Furthermore, the smoke diffusion speed in different directions of Laboratory 3 was calculated using the concentration change value.

[0047] Furthermore, based on the smoke diffusion velocity, interpolation is performed in the position coordinate system to obtain the smoke diffusion law in laboratory 3.

[0048] In the present application examples, see Figures 1 to 4 As shown, five groups of battery support assemblies are arranged at intervals along the length direction of the laboratory 3 in the laboratory 3, and a first combustible gas composite sensor 32 is installed on the top and bottom surfaces of the laboratory 3 corresponding to each group of battery support assemblies. From the position of the laboratory 3 close to the air inlet 35 to the position of the laboratory 3 close to the smoke exhaust port 11, the five first combustible gas composite sensors 32 arranged in sequence on the bottom surface of the laboratory 3 are respectively recorded as a, d, e, f, and g, and the five first combustible gas composite sensors 32 arranged in sequence on the top surface of the laboratory 3 are respectively recorded as h, k, l, m, and n; further, the thermal runaway test package 4 is placed On the battery support assembly near the air inlet 35, multiple second combustible gas composite sensors 33 are respectively installed on the top and bottom surfaces of the laboratory 3 corresponding to the thermal runaway test package 4. The two second combustible gas composite sensors 33 installed on the bottom surface of the laboratory 3 are respectively recorded as b and c, and b, c and a can be connected in a straight line. The two second combustible gas composite sensors 33 installed on the top surface of the laboratory 3 are respectively recorded as i and j, and i, j and h can also be connected in a straight line; and a third combustible gas composite sensor 34p is installed on the side of the laboratory 3 corresponding to the thermal runaway test package 4, and a, p and h can be on the same axis. A three-dimensional coordinate system is established with the first combustible gas composite sensor 32a as the origin of the coordinate system, the straight line where a, d, e, f, and g are located as the X axis, the straight line where a, b, and c are located as the Y axis, and the axis where a, p, and h are located as the Z axis, and the distance from each combustible gas composite sensor to the origin a of the coordinate system is measured respectively.

[0049] During the experiment, the thermal runaway induction device in the thermal runaway test package 4 is started to induce thermal runaway of the battery pack, and the smoke concentration values ​​of the combustible gas composite sensors in the laboratory 3 at different times are continuously collected until the fire in the thermal runaway test package 4 is extinguished. The smoke diffusion speed in the X-axis direction is calculated using a, d, e, f, and g, the smoke diffusion speed in the Y-axis direction is calculated using a, b, and c, and the smoke diffusion speed in the Z-axis direction is calculated using a, p, and h. The smoke in the X-axis direction, the Y-axis direction, and the Z-axis direction can all be curved. Get the value of d on the X-axis at t 1 The smoke concentration Q at time t is marked on the Z and Y axes by interpolation method according to the diffusion speed of smoke in each axis direction. 1The time, and the corresponding points on the Y and Z axes when the smoke concentration is Q, and finally the coordinate point d on the X axis and the corresponding points on the Y and Z axes are connected and fitted into a surface. The above method is used to bring different smoke concentration values ​​at different times into the constructed three-dimensional coordinate system, and then continue to fit into a surface, and finally the diffusion law of the smoke field in Laboratory 3 is obtained.

[0050] It should be understood that in addition to establishing a three-dimensional coordinate system with the first combustible gas composite sensor 32a as the coordinate origin, a three-dimensional coordinate system regarding h, k, l, m, n and i, j, h as well as h, p, a can also be established with the first combustible gas composite sensor 32h as the coordinate origin. That is, according to the different placement positions of the thermal runaway experiment package 4, different coordinate systems can be selected for calculation. For example, if it is placed on the bottom surface of the laboratory 3, the first combustible gas composite sensor 32a is used as the coordinate origin, and if it is placed on the top surface of the laboratory 3, the first combustible gas composite sensor 32h is used as the coordinate origin. The experimental operation method and calculation fitting method are the same as those described above and will not be repeated here.

[0051] In the embodiment of the present application, the smoke diffusion test device can be used to collect the smoke diffusion law in the laboratory 3 in real time, and the concentration change curve of any point in the laboratory 3 can be calculated more accurately and conveniently, providing a basis for the fire protection system sensor system design, fire protection strategy design, cabin smoke exhaust structure design, etc.

[0052] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, 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 therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A smoke diffusion test device, characterized in that: It includes: A cabin, wherein a partition plate (1) is installed in the cabin, wherein the partition plate (1) divides the cabin into an equipment room (2) and a laboratory (3), and a signal collection device is installed in the equipment room (2); A plurality of battery support assemblies, each of which is installed in the laboratory (3), and the plurality of battery support assemblies are arranged at intervals along the extension direction of the laboratory (3); A plurality of first combustible gas composite sensors (32) are installed on the top and bottom surfaces of the laboratory (3), the first combustible gas composite sensors (32) are used to collect smoke concentration in the laboratory (3), and the first combustible gas composite sensors (32) are electrically connected to the signal collection device.

2. The smoke diffusion test device according to claim 1, characterized in that: Each group of the battery support components comprises two battery support racks (31), the two battery support racks (31) are arranged at intervals along the extension direction of the laboratory (3), and a battery placement space (311) is formed between the two battery support racks (31); At least two of the first combustible gas composite sensors (32) are installed in each of the battery placement spaces (311), and at least two of the first combustible gas composite sensors (32) are installed on the top surface and the bottom surface of the laboratory (3), respectively.

3. The smoke diffusion test device according to claim 2, characterized in that: The smoke diffusion test device further comprises a thermal runaway test package (4), wherein the thermal runaway test package (4) is installed in the battery placement space (311); A plurality of second combustible gas composite sensors (33) are respectively installed on the top and bottom surfaces of the laboratory (3) at locations corresponding to the battery placement space (311) where the thermal runaway experiment package (4) is installed. The second combustible gas composite sensors (33) are all electrically connected to the signal acquisition device, and the second combustible gas composite sensors (33) and the first combustible gas composite sensors (32) in the battery placement space (311) where the thermal runaway experiment package (4) is installed are spaced apart in a direction perpendicular to the spacing direction of the plurality of battery support frames (31).

4. The smoke diffusion test device according to claim 3, characterized in that: A third combustible gas composite sensor (34) is also installed at the battery placement space (311) on the side wall of the laboratory (3) corresponding to the battery placement space (311) where the thermal runaway test package (4) is installed; The third combustible gas composite sensor (34) is located between the first combustible gas composite sensor (32) on the top and bottom surfaces of the laboratory (3).

5. The smoke diffusion test device according to claim 3, characterized in that: A thermal runaway inducing device is installed in the thermal runaway test package (4).

6. The smoke diffusion test device according to claim 2, characterized in that: Each of the first combustible gas composite sensors (32) is spaced apart from the side wall of the laboratory (3).

7. The smoke diffusion test device according to claim 1, characterized in that: The partition plate (1) is provided with a smoke exhaust port (11), and the side of the laboratory (3) away from the equipment room (2) is also provided with an air inlet (35).

8. A smoke diffusion test method, characterized in that: The smoke diffusion test device according to any one of claims 1 to 7 is used, and the smoke diffusion test method comprises the following steps: Installing a plurality of first combustible gas composite sensors (32) in the laboratory (3); Installing a thermal runaway test package (4) on a set of battery support components, and triggering thermal runaway of the thermal runaway test package (4); The signal acquisition device is used to continuously acquire data from each first combustible gas composite sensor (32) until the fire in the laboratory (3) is extinguished, thereby obtaining the smoke diffusion law in the laboratory (3).

9. The smoke diffusion test method according to claim 8, characterized in that: Each group of the battery support components comprises two battery support frames (31), a battery placement space (311) is formed between the two battery support frames (31), and the thermal runaway test package (4) is installed on a group of battery support components, comprising: The thermal runaway test package (4) is installed in the battery placement space (311), and a plurality of second combustible gas composite sensors (33) are respectively installed at the battery installation spaces where the thermal runaway test package (4) is installed on the top and bottom surfaces of the laboratory (3); A third combustible gas composite sensor (34) is installed on the side wall of the laboratory (3) corresponding to the battery placement space (311) where the thermal runaway experiment package (4) is installed.

10. The smoke diffusion test method according to claim 9, characterized in that: The signal acquisition device is used to continuously acquire data from each first combustible gas composite sensor (32) until the fire in the laboratory (3) is extinguished, and the smoke diffusion law in the laboratory (3) is obtained, including: Establishing a position coordinate system of a first combustible gas composite sensor (32), a second combustible gas composite sensor (33), and a third combustible gas composite sensor (34) in a laboratory (3); Respectively obtaining concentration change values ​​of the smoke concentration of the first combustible gas composite sensor (32) at each position, the second combustible gas composite sensor (33) at each position, and the third combustible gas composite sensor (34) as a function of time; The concentration change value is used to calculate the smoke diffusion speed in different directions of the laboratory (3); Based on the smoke diffusion velocity, interpolation is performed in the position coordinate system to obtain the smoke diffusion law in the laboratory (3).

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