Testing device

Abstract

The utility model relates to a testing device, which comprises a box body and a flexible compression assembly, and is characterized in that the box body is provided with a testing cavity; the flexible compression assembly comprises a flexible part arranged outside the box body, the flexible part is communicated with the test cavity, and the flexible part can expand or contract outside the box body. Tail gas generated in the testing process can enter the flexible part to be collected, after testing is completed, tail gas in the testing cavity and the flexible part is exhausted through the flexible part, the flexible part serves as an exhaust pipeline, and therefore the structure of the testing device is simpler; by arranging the flexible part, the volume of the box body can be reduced, so that the overall occupied area of the testing device can be reduced, the testing device is convenient to move, and the cost is reduced; meanwhile, the initial oxygen amount is small, the risk of secondary detonation of the battery can be reduced, and the tail gas treatment amount can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a testing device. Background Art

[0002] Since a large amount of exhaust gas will be generated during the testing process of the battery thermal runaway testing device, it is necessary to independently establish a testing device with a relatively large volume, equipped with explosion-proof walls and explosion-proof doors with sufficient thickness to ensure that the sudden impact during the diffusion of battery thermal runaway will not break through the cavity or cause exhaust gas to overflow.

[0003] However, this will result in a relatively large floor area of the testing device, inconvenient movement, and high cost. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a testing device for the above problems to reduce the volume of the testing device, lower the cost and facilitate movement.

[0005] The utility model provides a testing device, including: a box body main body having a testing cavity; and a flexible compression assembly including a flexible member disposed outside the box body main body, the flexible member communicating with the testing cavity, and the flexible member being capable of expanding or contracting outside the box body main body.

[0006] In the above testing device, the exhaust gas generated during the testing process can enter the flexible member for collection, and the flexible member gradually expands, so as to reduce the impact on the inner wall of the testing cavity caused by the exhaust gas generated during the diffusion of battery thermal runaway, avoid damage to the box body main body due to excessive pressure in the testing cavity, and avoid exhaust gas overflowing to pollute the environment or harm the testing personnel; after the testing is completed, the exhaust gas in the testing cavity and the flexible member is discharged through the flexible member, and the flexible member gradually contracts. The flexible member serves as an exhaust pipe, which can save an additional exhaust pipe and make the structure of the testing device simpler; by setting the flexible member, the volume of the box body main body can be reduced, thereby reducing the overall floor area of the testing device, facilitating the movement of the testing device, and lowering the cost; at the same time, since the internal space of the testing cavity is reduced and the initial oxygen content is less, when a fire breaks out in the testing cavity, the spread speed of the fire is slower, so as to reduce the risk of secondary deflagration of the battery, and can also effectively reduce the exhaust gas treatment volume and accelerate the exhaust gas treatment efficiency.

[0007] In one embodiment, the flexible member is used to communicate with an exhaust gas treatment assembly, and the flexible member can discharge the exhaust gas in the testing cavity and the flexible member.

[0008] With such a setting, after the testing is completed, the exhaust gas in the testing cavity and the flexible member is discharged through the flexible member into the exhaust gas treatment assembly for exhaust gas treatment, so that the gas finally discharged to the outside is the gas that meets the emission requirements.

[0009] In one embodiment, the flexible member is used to connect to the ventilation valve, and the ventilation valve can control the communication / disconnection between the flexible member and the outside.

[0010] With such a setting, during the test process, the flexible member is disconnected from the outside through the ventilation valve to prevent the exhaust gas in the test chamber and the flexible member from overflowing; after the test is completed, the flexible member is connected to the outside through the ventilation valve to discharge the exhaust gas in the test chamber and the flexible member through the flexible member.

[0011] In one embodiment, the flexible compression assembly further includes a mounting box provided on the main body of the box. In the contracted state, at least part of the flexible member is accommodated in the mounting box; alternatively, a mounting groove is provided on the outer wall of the main body of the box, and in the contracted state, at least part of the flexible member is accommodated in the mounting groove.

[0012] With such a setting, in the contracted state, at least part of the flexible member can be accommodated in the mounting box or the mounting groove to protect the flexible member and also ensure the regular appearance of the test device, facilitating the storage or transportation of the test device.

[0013] In one embodiment, the main body of the box further has a second exhaust port communicating with the test chamber, and the second exhaust port is used to communicate with the exhaust gas treatment assembly.

[0014] With such a setting, after the test is completed, the exhaust gas in the test chamber and the flexible member can be discharged through the second exhaust port into the exhaust gas treatment assembly for exhaust gas treatment, thereby improving the exhaust gas treatment efficiency and the test efficiency of the test device.

[0015] In one embodiment, the main body of the box includes side plates and a door panel that enclose to form the test chamber. The door panel is provided on the side plates in an openable and closable manner. The second exhaust port is provided on a side wall of the side plate opposite to the door panel; a communication port is provided on the side plate, and the flexible member communicates with the test chamber through the communication port.

[0016] With such a setting, most of the exhaust gas in the test chamber flows towards the rear wall of the side plate, preventing the exhaust gas from remaining in the area near the door panel.

[0017] In one embodiment, the number of the communication ports is multiple, and the number of the flexible members is multiple. Each flexible member is respectively communicated with one of the communication ports.

[0018] With such a setting, multiple flexible members can ensure that enough gas can be accommodated in the test chamber and the expanded flexible member, preventing the excessive exhaust gas generated during the test from causing too high pressure in the test chamber, and at the same time reducing the volume of the main body of the box.

[0019] In one embodiment, the test device further includes a support frame detachably disposed on the bottom wall of the test chamber, and the support frame is configured as a fireproof structure.

[0020] With such a setting, the support frame is used to support the test sample, and the user can choose whether to use the support frame according to the actual test requirements. The support frame being configured as a fireproof structure can prevent the structure of the support frame from deforming due to the ignition of the test sample.

[0021] In one embodiment, a receiving groove for accommodating a battery is provided on the bottom wall of the test chamber.

[0022] With such a setting, the test sample can be directly placed in the receiving groove. When the test sample catches fire during the test, liquid is injected into the receiving groove so that the test sample is immersed in the liquid, achieving rapid cooling and extinguishing.

[0023] In one embodiment, a water inlet / outlet capable of communicating the receiving groove with the outside is further provided at the bottom of the box body.

[0024] With such a setting, the water inlet / outlet can facilitate the user to inject liquid into the receiving groove or drain the liquid in the receiving groove, and the operation is simple and convenient.

[0025] In one embodiment, the test device further includes a blowing component at least partially located in the test chamber, and the blowing component can blow air towards the inner wall of the test chamber; and / or, the test device further includes a spraying component at least partially located in the test chamber, and the spraying component can spray liquid into the test chamber.

[0026] With such a setting, when the blowing component blows air towards the inner wall of the test chamber, the gas can blow off the dust and impurities adhering to the inner wall of the test chamber; when the test sample catches fire or is about to catch fire, fire extinguishing liquid can be sprayed through the spraying component to extinguish the fire and cool down the test sample.

[0027] In one embodiment, the box body further has a one-way air inlet capable of communicating the test chamber with the outside.

[0028] With such a setting, in the later stage of tail gas treatment, gas can be filled into the test chamber through the one-way air inlet to increase the internal pressure of the test chamber, and it can also assist in discharging the remaining tail gas in the test chamber.

[0029] In one embodiment, the flexible member is configured as an airbag.

[0030] With such a setting, the airbag has a large deformation ability and a low cost. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 Schematic diagram of the three-dimensional structure of a test device according to an embodiment of the utility model;

[0033] Figure 2 For Figure 1 Schematic diagram of the three-dimensional structure of the test device from another perspective;

[0034] Figure 3 For Figure 1 Schematic diagram of the three-dimensional structure of the test device without the flexible member installed;

[0035] Figure 4 For Figure 1 Schematic diagram of the structure of the door panel of the test device in the open state;

[0036] Figure 5 For Figure 4 Schematic diagram of the three-dimensional structure of the test device from another perspective;

[0037] Figure 6 For Figure 4 Schematic diagram of the three-dimensional structure of the test device with the support frame disassembled.

[0038] Reference numerals: 1, main body of the box; 11, test chamber; 111, side plate; 112, door panel; 1121, viewing window; 1122, handle; 12, communication port; 13, second exhaust port; 14, receiving groove; 15, water inlet and outlet; 16, assembly groove; 17, explosion-proof glass; 18, one-way air inlet; 2, flexible compression assembly; 21, flexible member; 22, mounting box; 3, support frame; 4, wiring assembly; 41, junction box; 42, wiring panel; 5, blowing assembly; 51, blowing pipeline; 6, spraying assembly; 61, spraying pipeline. Detailed implementation manners

[0039] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present application with reference to the drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0040] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0043] Unless otherwise defined, all technical and scientific terms used in the description of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application are only for the purpose of describing specific implementation manners and are not intended to limit the present application. The term "and / or" used in the description of the present application includes any and all combinations of one or more of the related listed items.

[0044] Since a large amount of exhaust gas will be generated during the battery thermal runaway test process, it is necessary to independently establish a relatively large test device, which is equipped with an explosion-proof wall and an explosion-proof door with sufficient thickness to ensure that the sudden impact during the diffusion of battery thermal runaway will not break through the cavity or cause the exhaust gas to overflow. However, this will result in a large floor area of the test device, inconvenient movement, and high cost.

[0045] To solve the above problems, as Figures 1 to 6 shown, the present utility model provides a test device to reduce the volume of the test device and lower the cost.

[0046] As Figure 1 andFigure 5 As shown, specifically, the testing device includes a box body main body 1 and a flexible compression component 2, where: the box body main body 1 has a testing cavity 11; the flexible compression component 2 includes a flexible member 21 disposed outside the box body main body 1, the flexible member 21 communicates with the testing cavity 11, and the flexible member 21 can expand or contract outside the box body main body 1.

[0047] The testing device provided by the embodiment of the present utility model can be used for thermal runaway testing of other test samples such as batteries. A sufficiently large space is preset inside the testing cavity 11, and a battery of a common size can be placed. During the testing process, the testing cavity 11 and the flexible member 21 jointly form a sealed environment, and the generated tail gas can enter the flexible member 21 for collection. The flexible member 21 gradually expands, so as to reduce the impact of the tail gas generated during the diffusion of battery thermal runaway on the inner wall of the testing cavity 11, avoid damage to the box body main body 1 caused by excessive pressure in the testing cavity 11, and avoid tail gas overflow to pollute the environment or harm the testing personnel, thereby being able to protect the health of the testing personnel to the greatest extent and cause the least degree of pollution to the environment, with high safety; after the testing is completed, the tail gas in the testing cavity 11 and the flexible member 21 can be discharged to a designated space through the flexible member 21. The flexible member 21 gradually contracts, and the flexible member 21 serves as an exhaust pipe, which can save an additional exhaust pipe, making the structure of the testing device simpler.

[0048] By setting the flexible member 21, the volume of the box body main body 1 can be reduced, so as to reduce the overall floor area of the testing device, facilitate the movement of the testing device, and reduce costs; due to the fast update and different specifications of battery products, the smaller volume of the testing device can also facilitate upgrading and has a wide range of applications; at the same time, since the internal space of the testing cavity 11 is reduced and the initial oxygen content is less, when a fire breaks out in the testing cavity 11, the spread speed of the fire is slower, so as to reduce the risk of secondary deflagration of the battery, and can also effectively reduce the tail gas treatment volume and accelerate the tail gas treatment efficiency, thereby improving the testing efficiency of the testing device.

[0049] Among them, the box body main body 1 can be set as a structure with a sealed space such as a testing room or a testing box.

[0050] Such as Figure 1 and Figure 4As shown in the figure, the box body main body 1 includes side plates 111 and a door plate 112 that enclose to form a test chamber 11, and the door plate 112 is movably arranged on the side plates 111. Specifically, the door plate 112 is provided with a viewing window 1121 and a handle 1122. Before the test, after the user puts the test sample into the test chamber 11, the user can close the door plate 112 through the handle 1122 and ensure that the door plate 112 is locked; during the test, the user can directly observe the situation of the test sample inside the test chamber 11 through the viewing window 1121; after the test is completed, the user can open the door plate 112 again through the handle 1122 to facilitate observing or taking the test sample in the test chamber 11.

[0051] As Figure 3 shown, in an implementation manner, the side plate 111 is provided with a communication port 12, and the flexible member 21 is provided with an air inlet for the flexible member 21 to communicate with the test chamber 11 through the communication port 12. Specifically, the flexible member 21 may be provided with an air inlet for communicating with the communication port 12. The air inlet of the flexible member 21 is hermetically communicated with the communication port 12 to prevent the exhaust gas in the test chamber 11 from overflowing from the communication port 12.

[0052] As Figure 1 and Figure 3 shown, the number of the communication ports 12 is multiple, and the number of the flexible members 21 is multiple. The air inlet of each flexible member 21 is respectively communicated with one of the communication ports 12. The multiple communication ports 12 may be respectively opened on multiple different walls of the side plate 111, or may be opened on the same wall of the side plate 111. The multiple flexible members 21 can ensure that enough gas can be accommodated in the test chamber 11 and the expanded flexible members 21, prevent the pressure in the test chamber 11 from being too high due to a large amount of exhaust gas generated during the test, and can also further reduce the volume of the box body main body 1. Among them, the number of the flexible members 21 may be the same as the number of the communication ports 12, that is, each communication port 12 is connected with a flexible member 21; of course, the number of the flexible members 21 may also be less than the number of the communication ports 12, and the communication ports 12 not connected with the flexible members 21 are blocked by structures such as air valves, switches, and covers to ensure that the exhaust gas in the test chamber 11 and the flexible members 21 does not overflow through the communication ports 12 not connected with the flexible members 21.

[0053] In an implementation manner, the inner wall of the test chamber 11 is set as a pressure relief wall, which can block the flame when the test sample catches fire. And the door plate 112 can be set as an explosion-proof door to ensure the safety of the box body main body 1.

[0054] As Figures 4 to 5As shown, in one embodiment, an assembly groove 16 is provided on the inner wall of the test chamber 11. An explosion-proof glass 17 is provided at the notch of the assembly groove 16. The test device further includes lamps and other devices such as cameras disposed in the assembly groove 16. Installing the lamps in the assembly groove 16 can ensure sufficient light sources in the test chamber 11 so that users can clearly observe the internal situation of the test chamber 11 through the viewing window 1121. Installing the camera in the assembly groove 16 can capture the internal images of the test chamber 11, or the camera can also be disposed in front of the viewing window 1121 to monitor the internal situation of the test chamber 11 through the viewing window 1121. The explosion-proof glass 17 can ensure light transmittance and at the same time protect the lamps or cameras in the assembly groove 16. Among them, the number of the assembly grooves 16 can be one, two or more. The assembly groove 16 is preferably provided on the top wall of the test chamber 11 to ensure the lighting effect of the lamps or the shooting effect of the cameras.

[0055] As Figure 1 shown, in one embodiment, the box body main body 1 is further provided with a one-way air inlet 18 capable of communicating the test chamber 11 with the outside. The one-way air inlet 18 can only realize the one-way flow of the outside gas towards the inside of the test chamber 11, and the gas in the test chamber 11 cannot overflow to the outside from the one-way air inlet 18. Among them, the one-way air inlet 18 can be provided on the door panel 112 or at any other suitable position such as the side plate 111. Specifically, during the test, the one-way air inlet 18 is in a closed state to prevent the outside gas from entering the test chamber 11 and causing excessive pressure in the test chamber 11. After the test is completed, in the early stage of tail gas treatment, the one-way air inlet 18 is still in a closed state. Since the tail gas in the test chamber 11 and the flexible member 21 continuously discharges through the first exhaust port, the internal air pressure of the test chamber 11 continuously decreases and the flexible member 21 continuously contracts. Therefore, in the later stage of tail gas treatment, when the flexible member 21 is completely in a contracted state, to prevent the internal air pressure of the test chamber 11 from being too low, the one-way air inlet 18 can be opened to fill the test chamber 11 with gas through the one-way air inlet 18 to increase the internal air pressure of the test chamber 11, and it can also assist in discharging the remaining tail gas in the test chamber 11 to further improve the tail gas treatment efficiency.

[0056] In one embodiment, the flexible member 21 is used to communicate with an exhaust gas treatment assembly (not shown in the figure), and the flexible member 21 can discharge the exhaust gas in the test chamber 11 and the flexible member 21. Specifically, the flexible member 21 may be provided with a first exhaust port for communicating with the exhaust gas treatment assembly. During the test, the exhaust gas treatment assembly is in a closed state, and the exhaust gas in the test chamber 11 and the flexible member 21 will not be discharged into the exhaust gas treatment assembly through the first exhaust port; after the test is completed, the exhaust gas treatment assembly is controlled to start working to discharge the exhaust gas in the test chamber 11 and the flexible member 21 into the exhaust gas treatment assembly through the first exhaust port and perform exhaust gas treatment, so that the gas finally discharged to the outside is a gas that meets the emission requirements, avoiding the discharge of toxic and harmful gases to the outside and polluting the environment or harming the test personnel. Moreover, when the exhaust gas treatment assembly is working, relevant external devices can also be used to actively compress the flexible member 21 to further improve the exhaust gas treatment efficiency.

[0057] In one embodiment, the flexible member 21 is used to connect with a ventilation valve (not shown in the figure), and the ventilation valve can control the communication or disconnection between the flexible member 21 and the outside. Specifically, the ventilation valve can be connected to the first exhaust port of the flexible member 21. During the test, the ventilation valve is controlled to close to block the first exhaust port to prevent the exhaust gas in the test chamber 11 and the flexible member 21 from overflowing through the first exhaust port; after the test is completed, the ventilation valve is controlled to open to open the first exhaust port, so that the exhaust gas in the test chamber 11 and the flexible member 21 can be discharged into the exhaust gas treatment assembly through the first exhaust port.

[0058] Of course, in other embodiments, when the test device includes an exhaust gas treatment assembly communicating with the first exhaust port, the on-off of the first exhaust port can also be controlled by the exhaust gas treatment assembly; or, the on-off of the first exhaust port can also be controlled by other structures such as switches and covers, as long as it can be ensured that during the test, the exhaust gas in the test chamber 11 and the flexible member 21 will not overflow through the first exhaust port. The embodiments of the present invention do not make specific limitations here.

[0059] As Figure 5 shown, in one embodiment, the flexible compression assembly 2 further includes an installation box 22 disposed on the box body main body 1 and around the communication port 12. The installation box 22 is provided with an installation groove. In the contracted state, at least part of the flexible member 21 is received in the installation groove. The installation box 22 can be embedded in the box body main body 1 or protrude from the outer wall of the box body main body 1. The notch of the installation groove faces the outside of the box body main body 1, and the installation groove is not communicated with the test chamber 11. In the contracted state, at least part of the flexible member 21 can be received in the installation groove to protect the flexible member 21 and also ensure the regular appearance of the test device, which is convenient for storing or transporting the test device.

[0060] In one embodiment, an installation groove is provided on the outer wall of the box body main body 1 around the communication port 12. In the contracted state, at least a part of the flexible member 21 is accommodated in the installation groove. The installation groove is directly opened on the outer wall of the box body main body 1. Similarly, the notch of the installation groove faces the outside of the box body main body 1, and the installation groove is not communicated with the test chamber 11.

[0061] In one embodiment, the flexible member 21 is provided as an air bag. The air bag has a large deformation ability and a low cost. Of course, in other embodiments, the flexible member 21 can also be provided as other structures such as air bags that can deform after being filled with gas and can withstand large pressures. The embodiments of the present invention do not make specific limitations here.

[0062] As Figure 2 shown, in one embodiment, the box body main body 1 is further provided with a second exhaust port 13 communicated with the test chamber 11. The second exhaust port 13 is used to communicate with the tail gas treatment assembly. Specifically, the second exhaust port 13 can be communicated with the tail gas treatment assembly through a pipeline (not shown in the figure), and structures such as a ventilation valve, a switch, and a cover body for controlling the on / off of the second exhaust port 13 can be provided at the second exhaust port 13. During the test, the second exhaust port 13 is in a closed state to prevent the tail gas in the test chamber 11 and the flexible member 21 from overflowing through the second exhaust port 13 and ensure the normal progress of the test; after the test is completed, the tail gas in the test chamber 11 and the flexible member 21 can be discharged to the tail gas treatment assembly through the second exhaust port 13 and the pipeline, thereby further accelerating the tail gas treatment efficiency and improving the test efficiency of the test device.

[0063] As Figures 1 to 2 shown, in one embodiment, the second exhaust port 13 is provided on the side wall of the side plate 111 opposite to the door plate 112, that is, the second exhaust port 13 is provided on the rear wall of the side plate 111. In this way, most of the tail gas in the test chamber 11 flows toward the rear wall of the side plate 111, avoiding the tail gas remaining in the area near the door plate 112. When the one-way air inlet 18 is provided on the door plate 112, the one-way air inlet 18 is disposed opposite to the second exhaust port 13. By filling the test chamber 11 with gas through the one-way air inlet 18, the flow rate of the tail gas in the test chamber 11 flowing toward the rear wall of the side plate 111 can be increased to further accelerate the tail gas treatment efficiency. Of course, in other embodiments, the second exhaust port 13 can also be provided at any other suitable position such as the top wall or the side wall of the side plate 111.

[0064] As Figure 4 and Figure 6As shown, in one embodiment, the test device further includes a support frame 3 detachably disposed on the bottom wall of the test chamber 11. The support frame 3 is configured as a fireproof structure. The support frame 3 is used to support the test sample, and the support frame 3 is detachably arranged, so that the user can choose whether to use the support frame 3 according to the actual test requirements. The support frame 3 being configured as a fireproof structure can prevent the structural deformation of the support frame 3 caused by the ignition of the test sample, and ensure the stability and reliability of the support frame 3. Among them, the fireproof structure can be other fireproof materials such as fire-resistant steel beams.

[0065] As Figure 6 shown, in one embodiment, the bottom wall of the test chamber 11 is provided with a receiving groove 14 for receiving test samples such as batteries. When the support frame 3 is not used, for example, when performing a thermal runaway test of a larger level or when the test sample is relatively dangerous and has a need for immersion in water, the test sample can be directly placed in the receiving groove 14. When the test sample catches fire during the test, liquid is injected into the receiving groove 14 until the liquid level reaches the maximum height that the receiving groove 14 can accommodate, so that the test sample is immersed in the liquid to achieve rapid cooling and fire extinguishing. Among them, the size of the receiving groove 14 is larger than the size of the test sample to prevent the test sample from exploding due to being squeezed by the inner wall of the receiving groove 14 after expansion.

[0066] As Figure 6 shown, in one embodiment, the bottom of the box body main body 1 is further provided with a water inlet / outlet 15 that can communicate the receiving groove 14 with the outside. During normal testing, the water inlet / outlet 15 is in a closed state, and the tail gas in the test chamber 11 and the flexible member 21 will not overflow through the water inlet / outlet 15; when the test sample catches fire during the test, the water inlet / outlet 15 can be opened, and devices such as a water pump and a water extractor are used to inject liquid into the receiving groove 14 through the water inlet / outlet 15; after the fire extinguishing in the test chamber 11 is completed and it is confirmed that there is no risk, the water inlet / outlet 15 is opened again, and devices such as a water pump and a water extractor are used to discharge the liquid in the receiving groove 14 through the water inlet / outlet 15. In this way, the water inlet / outlet 15 can facilitate the user to inject liquid into the receiving groove 14 or discharge the liquid in the receiving groove 14, and the operation is simple and convenient.

[0067] As Figure 5As shown, in one embodiment, the testing device further includes a spray assembly 6 at least partially located within the testing chamber 11. The spray assembly 6 is capable of spraying liquid into the testing chamber 11. When the test sample catches fire or is about to catch fire, fire extinguishing liquid, such as ordinary water or liquid nitrogen, can be sprayed through the spray assembly 6 to extinguish the fire and cool down the test sample, so as to avoid damage to other components such as the flexible member 21 within the testing chamber 11 caused by the high-temperature flame. When the test sample is placed in the receiving groove 14, enough liquid can also be sprayed into the receiving groove 14 through the spray assembly 6 until the liquid level reaches the maximum height that the receiving groove 14 can accommodate, thereby playing a role in soaking and extinguishing the test sample. When the spray assembly 6 sprays rapid cooling liquid when the test sample is about to catch fire, it can rapidly cool down the test sample, thereby avoiding the test sample from catching fire, preserving the test sample, and providing an analysis case for subsequent experiments. Moreover, after the spray assembly 6 sprays liquid into the testing chamber 11, the water inlet and outlet 15 can be opened, and devices such as a water pump or a water extractor can be used to discharge the liquid within the testing chamber 11 through the water inlet and outlet 15. Among them, the spray assembly 6 can be remotely manually activated, or a sensor can be installed to detect the internal temperature of the testing chamber 11, and the spray assembly 6 is automatically activated when the sensor detects high temperature.

[0068] In one embodiment, the spray assembly 6 includes a spray pipe 61 disposed on the top wall of the testing chamber 11. Among them, the spray pipe 61 has the ability to withstand high temperatures, and when liquid nitrogen is selected for fire extinguishing, the spray pipe 61 also needs to have the ability to withstand low temperatures. The spray pipe 61 can be externally connected to devices such as a water tank, a water pump, or a water extractor, so as to inject the liquid in the water tank into the spray pipe 61 through the water pump or the water extractor. The spray pipe 61 is provided with spray openings facing downward, so as to spray the liquid onto the test sample that has caught fire or is about to catch fire through the spray openings of the spray pipe 61, so as to better extinguish the flame ignited by the test sample and cool down the test sample. Specifically, to ensure the spraying effect of the spray pipe 61, the spray pipe 61 can adopt a "return" - shaped pipe as Figure 5 shown, or other shaped pipes such as a "cross" - shaped or "abundant" - shaped pipe can also be adopted to ensure that the spraying range of the spray pipe 61 can cover the test sample.

[0069] As Figure 4As shown, in one embodiment, the test device further includes a wiring assembly 4, and the wiring assembly 4 includes a junction box 41 and a wiring panel 42 that are electrically connected to each other. The junction box 41 is disposed in the test chamber 11, and the wiring panel 42 is disposed outside the box body 1. Among them, the outer surface of the junction box 41 is fireproof and waterproof, and has good explosion-proof ability to avoid damage to the wire harness or components inside the junction box 41. Before the test, various wire harnesses required for the test arranged on the test sample are connected to the junction box 41, and the corresponding interfaces on the wiring panel 42 are connected to a data acquisition instrument, a power supply or other external test equipment with wire harnesses; during the test, the signals of the test sample can be transmitted from the junction box 41 to the wiring panel 42, and then transmitted from the wiring panel 42 to the data acquisition instrument, the power supply or other external test equipment to read the information of the test sample or control the progress of the test. Moreover, the spraying assembly 6 can also be linked with the thermal signal transmitted in the wiring assembly 4, so that the spraying assembly 6 can be automatically turned on when the test sample touches thermal runaway.

[0070] As Figure 4 and Figure 6 shown, in one embodiment, the test device further includes a blowing assembly 5 at least partially located in the test chamber 11, and the blowing assembly 5 can blow air towards the inner wall of the test chamber 11. When the blowing assembly 5 blows air towards the inner wall of the test chamber 11, the gas can blow off the dust and impurities adhering to the inner wall of the test chamber 11. The blowing assembly 5 is preferably operated simultaneously with the tail gas treatment assembly to discharge the dust and impurities blown off the inner wall of the test chamber 11 together with the tail gas from the test chamber 11 and the flexible member 21; of course, the blowing assembly 5 can also work alone, and the tail gas treatment assembly is turned on again after the blowing assembly 5 finishes working to discharge the dust and impurities in the test chamber 11. Moreover, a filter screen for filtering impurity dust can be provided in the tail gas treatment assembly or in the pipeline communicating with the second exhaust port 13.

[0071] In one embodiment, the blowing assembly 5 includes a blowing pipeline 51 disposed on the inner wall of the test chamber 11, and the blowing pipeline 51 is provided with blowing ports. The blowing pipeline 51 can be externally connected to devices such as an air pump and a blower, so as to blow air into the blowing pipeline 51 through the air pump or the blower and blow air towards the inner wall of the test chamber 11 through the blowing ports of the blowing pipeline 51. Disposing the blowing pipeline 51 on the inner wall of the test chamber 11 enables the gas blown out from the blowing ports of the blowing pipeline 51 to flow along the inner wall of the test chamber 11, and the dust and impurities adhering to the inner wall of the test chamber 11 are more easily blown off. To ensure the blowing effect of the blowing pipeline 51, the blowing pipeline 51 can be disposed at the connection between the bottom wall and the side wall of the test chamber 11, that is, the blowing pipeline 51 is disposed at the edge of the bottom wall of the test chamber 11, and the opening direction of the blowing ports can be parallel to the inner wall of the test chamber 11, so that the gas blown out from the blowing ports can Figure 6Flow in the direction indicated by the arrow to blow off the dust and impurities adhering to the side wall and bottom wall of the test chamber 11. Moreover, when the installation groove is directly opened on the inner wall of the test chamber 11, it can also avoid the flexible compression assembly 2 from obstructing the air flow sweeping path of the air blowing assembly 5, and at the same time, it will not increase the cleaning dead angle.

[0072] Specifically, the air blowing ports include a first air blowing port with an opening direction parallel to the side wall of the test chamber 11 and a second air blowing port with an opening direction parallel to the bottom wall of the test chamber 11. The gas blown out from the first air blowing port can flow along Figure 6 the direction indicated by arrow a, and the gas blown out from the second air blowing port can flow along Figure 6 the direction indicated by arrow b.

[0073] In one embodiment, the test chamber 11 is configured as a square cavity, and the connection part of any two adjacent inner walls of the test chamber 11 is an arc structure, that is, the adjacent surfaces of any two adjacent inner walls of the test chamber 11 are connected by a rounded corner. Thereby, the cleaning dead angle in the test chamber 11 can be reduced, which is convenient for the gas blown out by the air blowing assembly 5 to turn at the connection part of the two adjacent inner walls, and thus the cleaning effect on the inside of the test chamber 11 can be improved. Of course, in other embodiments, the test chamber 11 can also be configured as a spherical cavity or other shaped structures according to actual test requirements.

[0074] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0075] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A testing device, characterized in that, Comprising: A box body main body (1) having a test chamber (11); And, A flexible compression assembly (2) including a flexible member (21) disposed outside the box body main body (1), the flexible member (21) communicating with the test chamber (11), and the flexible member (21) being capable of expanding or contracting outside the box body main body (1).

2. The test device according to claim 1, wherein The flexible member (21) is used for communicating with an exhaust gas treatment assembly, and the flexible member (21) can discharge the exhaust gas in the test chamber (11) and the flexible member (21).

3. The testing device according to claim 1, characterized in that, The flexible member (21) is used for connecting with a ventilation valve, and the ventilation valve can control the communication / disconnection between the flexible member (21) and the outside.

4. The test device according to claim 1, wherein The flexible compression assembly (2) further includes a mounting box (22) disposed on the box body main body (1). In the contracted state, at least a part of the flexible member (21) is received in the mounting box (22); or, An installation groove is provided on the outer wall of the box body main body (1). In the contracted state, at least a part of the flexible member (21) is received in the installation groove.

5. The test device according to claim 1, characterized in that, The box body main body (1) further has a second exhaust port (13) communicating with the test chamber (11), and the second exhaust port (13) is used for communicating with an exhaust gas treatment assembly.

6. The test device according to claim 5, characterized in that The box body main body (1) includes side plates (111) and a door plate (112) that enclose to form the test chamber (11). The door plate (112) is disposed on the side plates (111) in an openable and closable manner. The second exhaust port (13) is provided on a side wall of the side plates (111) opposite to the door plate (112); a communication port (12) is provided on the side plates (111), and the flexible member (21) communicates with the test chamber (11) through the communication port (12).

7. The test device according to claim 6, characterized in that, The number of the communication ports (12) is multiple, the number of the flexible members (21) is multiple, and each flexible member (21) communicates with one of the communication ports (12) respectively.

8. The test device according to claim 1, characterized in that, The test device further includes a support frame (3) detachably disposed on the bottom wall of the test chamber (11), and the support frame (3) is configured as a fireproof structure.

9. The test device according to claim 1, characterized in that, A receiving groove (14) for receiving a battery is provided on the bottom wall of the test chamber (11).

10. The test device according to claim 9, characterized in that, The bottom of the box body main body (1) further has a water inlet / outlet (15) capable of communicating the receiving groove (14) with the outside.

11. The testing device according to claim 1, characterized in that, The test device further includes a blowing assembly (5) at least partially located in the test chamber (11), and the blowing assembly (5) can blow air to the inner wall of the test chamber (11); and / or, The test device further includes a spraying assembly (6) at least partially located in the test chamber (11), and the spraying assembly (6) can spray liquid into the test chamber (11).

12. The test device according to any one of claims 1 to 11, characterized in that, The box body main body (1) further has a one-way air inlet (18) capable of communicating the test chamber (11) with the outside.

13. The test device according to any one of claims 1 to 11, characterized in that, The flexible member (21) is configured as an airbag.

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