Experimental module and experimental device

Abstract

The utility model provides an experiment module and an experiment device. The experiment cabin comprises a cabin body and a pressure relief mechanism, the cabin body comprises a wall plate and a cavity enclosed by the wall plate, the cavity is used for accommodating a to-be-detected piece, the wall plate is provided with an air inlet and an air extraction opening which are communicated with the cavity, the pressure in the cavity can be adjusted through the air extraction opening and the air inlet so as to detect the conditions of the to-be-detected piece under different pressure conditions, and the wall plate is provided with the pressure relief mechanism. When the pressure or the temperature in the chamber exceeds a threshold value due to the fact that the to-be-tested piece in the chamber explodes, the pressure relief mechanism actuates to relieve the pressure or the temperature in the chamber, the damage degree of the to-be-tested piece to the experiment module is reduced, and the reliability of the experiment module is improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to an experimental chamber and experimental apparatus. Background Technology

[0002] A variable pressure test chamber is an experimental device used to simulate different atmospheric pressure environments. It can be used to test the reliability, stability and performance of items, devices or equipment under different atmospheric pressure environments.

[0003] During the design and production of battery cells, it is necessary to test the cell's performance under different pressures using a variable pressure test chamber. However, due to the unique characteristics of battery cells, the reliability of variable pressure test chambers in battery cell testing still needs improvement. Utility Model Content

[0004] In view of the above problems, this application provides an experimental chamber and experimental apparatus that can improve the reliability of the experimental chamber in the battery cell testing process.

[0005] In a first aspect, this application provides an experimental chamber, comprising: a chamber body, including a wall panel and a cavity enclosed by the wall panel, the cavity being used to accommodate a test piece, the wall panel having an air inlet and an air outlet communicating with the cavity; and a pressure relief mechanism disposed on the wall panel, the pressure relief mechanism being configured to be actuated to release the internal pressure or temperature of the cavity when the internal pressure or temperature reaches a threshold.

[0006] In the embodiment of this application, the experimental chamber includes a chamber body and a pressure relief mechanism. The chamber body includes wall panels and a cavity enclosed by the wall panels. The cavity is used to accommodate the test piece. The wall panels have an air inlet and an air outlet communicating with the cavity. The pressure inside the cavity can be adjusted through the air inlet and the air outlet to detect the condition of the test piece under different pressure conditions. The pressure relief mechanism is provided on the wall panels. When the test piece inside the cavity is ignited and exploded, causing the pressure or temperature inside the cavity to exceed a threshold, the pressure relief mechanism is activated to release the internal pressure or temperature of the cavity, thereby reducing the damage to the experimental chamber caused by the explosion of the test piece and improving the reliability of the experimental chamber.

[0007] In some embodiments, the wall panel includes an end plate, a bottom plate, and a side plate, with the side plate connected between the end plate and the bottom plate. The end plate and the bottom plate are disposed opposite each other along a first direction, and the air extraction port and the pressure relief mechanism are both disposed on the end plate.

[0008] In the embodiment of this application, both the air extraction port and the pressure relief mechanism are located on the end plate to improve the compactness of the experimental chamber.

[0009] In some embodiments, the end plate includes a protrusion and a connecting portion connected to each other, the connecting portion being connected to the side plate, the protrusion being formed by the end plate protruding away from the bottom plate, a pressure relief mechanism being disposed on the connecting portion, and an air extraction port being disposed on the protrusion.

[0010] In the embodiment of this application, the end plate includes a protruding part and a connecting part that are connected to each other. The air extraction port is provided on the protruding part. The protruding part is formed by the end plate protruding away from the bottom plate to gather the gas and facilitate the gas to be extracted from the air extraction port. The pressure relief mechanism is provided on the relatively flat connecting part to reduce the difficulty of setting the pressure relief mechanism.

[0011] In some embodiments, the protrusion is centrally disposed on the end plate in the second direction and / or the third direction, and the first direction, the second direction and the third direction intersect each other.

[0012] In the embodiment of this application, the protrusion is centrally located on the end plate to shorten the distance from the protrusion to each edge of the end plate, so as to facilitate the gathering of gas from all parts of the chamber to the protrusion and the extraction port to the outside of the chamber, thereby improving the reliability of the experimental chamber.

[0013] In some embodiments, the experimental chamber further includes an air intake duct, one end of which is connected to an air inlet and the other end of which is connected to the external environment, wherein at least two air inlets are spaced apart on the side of the floor plate facing the chamber.

[0014] In the embodiment of this application, the air intake pipe connects the air inlet and the external environment, so that external gas can enter the chamber through the air inlet to regulate the pressure inside the chamber. At least two air inlets are spaced apart on the side of the bottom plate facing the chamber, which helps the gas to diffuse quickly and evenly inside the chamber, so that the pressure change inside the chamber is uniform and the reliability of the experimental chamber is improved.

[0015] In some embodiments, the wall panel includes an insulation layer and a support layer, the insulation layer being disposed on at least one side of the support layer in its thickness direction, and the thermal conductivity of the insulation layer being less than that of the support layer.

[0016] In the embodiment of this application, the wall panel includes an insulation layer and a support layer. The support layer is used to improve the structural strength of the experimental chamber. The insulation layer is disposed on at least one side of the support layer in its thickness direction to reduce the risk of damage to the insulation layer when the test piece deflagrates. The thermal conductivity of the insulation layer is less than that of the support layer. The insulation layer helps to maintain the temperature inside the chamber and improve the reliability of the experimental chamber.

[0017] In some embodiments, the wall panel includes two support layers spaced apart in its thickness direction, and an insulation layer is disposed between the two support layers.

[0018] In the embodiment of this application, the wall panel includes two support layers to enhance the structural strength of the experimental chamber. The two support layers are spaced apart in their thickness direction, and the insulation layer is disposed between the two support layers to enhance the protective effect of the support layers on the insulation layer and improve the problem that the insulation layer is easily damaged by external forces.

[0019] In some embodiments, the test chamber further includes a spray mechanism, wherein a placement area is provided on the side surface of the wall panel facing the chamber, the placement area is used to accommodate the test piece, the spray mechanism is disposed facing the placement area, and the spray mechanism is used to reduce the temperature of the test piece.

[0020] In the embodiment of this application, the experimental chamber is equipped with a spray mechanism facing the placement area of ​​the test piece. The spray mechanism is used to reduce the temperature of the test piece, thereby reducing the damage to the experimental chamber caused by the test piece and improving the reliability of the experimental chamber.

[0021] In some embodiments, the wall panel is provided with an observation hole, and the experimental chamber also includes a transparent element that covers the observation hole. The transparent element includes a body and a corrosion-resistant layer, and the corrosion-resistant layer is disposed on the side of the body facing the chamber.

[0022] In the embodiment of this application, the wall panel is provided with an observation hole, and a transparent part is covered by the observation hole to facilitate observation of the environment inside the chamber. The transparent part includes a body and a corrosion-resistant layer. The corrosion-resistant layer is disposed on the side of the body facing the chamber to reduce the damage of acidic gas generated by the combustion of the battery cell under test to the transparent part and improve the reliability of the experimental chamber.

[0023] Secondly, this application provides an experimental apparatus, including an air extraction component, an air intake component, and an experimental chamber as described in the first aspect embodiment above. The air extraction component is connected to an air extraction port, and the air intake component is connected to an air intake port, so that the air extraction component and the air intake component can adjust the pressure inside the chamber.

[0024] In the embodiment of this application, the pressure inside the chamber is adjusted by an air extraction component connected to the air extraction port and an air intake component connected to the air intake port, so that the test device can detect the condition of the test piece under different pressures.

[0025] In some embodiments, the air intake assembly includes an air intake pipe and a temperature regulating mechanism. The air intake pipe is connected to an air inlet, and the temperature regulating mechanism is thermally connected to the air intake pipe. The temperature regulating mechanism is used to regulate the temperature of the gas in the air intake pipe.

[0026] In the embodiment of this application, the air intake assembly includes an air intake pipe and a temperature regulation mechanism. The temperature regulation mechanism and the air intake pipe are thermally connected to regulate the temperature of the gas inside the air intake pipe, thereby regulating the temperature of the environment inside the chamber. This allows the experimental device to detect the condition of the test piece under different pressures and temperatures, improving the reliability of the experimental device. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of an experimental chamber provided in one embodiment of this application;

[0029] Figure 2 yes Figure 1 Sectional view at point AA;

[0030] Figure 3 yes Figure 2 Enlarged structural diagram at point B;

[0031] Figure 4 This is a schematic diagram of the structure of the transparent component of the experimental chamber provided in one embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of an experimental apparatus provided in one embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Experimental apparatus; 2. Air extraction assembly; 3. Air intake assembly; 4. Experimental chamber;

[0035] 41. Hull; 411. Wall panel; 412. Chamber; 413. Air inlet; 414. Air outlet; 415. End plate; 416. Side plate; 417. Bottom plate; 431. Protrusion; 432. Connecting part; 441. Insulation layer; 442. Support layer;

[0036] 42. Pressure relief mechanism;

[0037] 43. Intake pipe;

[0038] 45. Sprinkler system;

[0039] 46. ​​Transparent component; 461. Body; 462. Corrosion-resistant layer; 463. Observation hole;

[0040] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0043] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0048] During the design and production of battery cells, it is necessary to test the condition of the battery cells under different pressures using a variable pressure test chamber.

[0049] Due to the flammability and explosiveness of individual battery cells, when conducting experiments using existing experimental chambers, the chamber and its internal testing devices are easily damaged by the high temperatures and impacts caused by battery explosions.

[0050] To address the aforementioned issues, this application provides an experimental chamber comprising a chamber body and a pressure relief mechanism. The chamber body includes wall panels and a cavity enclosed by the wall panels. The cavity is used to accommodate the test piece. The wall panels have an air inlet and an air outlet communicating with the cavity. The pressure inside the cavity can be adjusted through the air inlet and outlet to detect the condition of the test piece under different pressure conditions. The pressure relief mechanism is provided on the wall panels. When the test piece inside the cavity is allowed to ignite and explode, causing the pressure or temperature inside the cavity to exceed a threshold, the pressure relief mechanism is activated to release the internal pressure or temperature of the cavity, reducing the damage to the experimental chamber caused by the explosion of the test piece and improving the reliability of the experimental chamber.

[0051] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0052] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0053] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0054] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0055] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0057] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices.

[0058] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an experimental chamber provided in one embodiment of this application; Figure 2 yes Figure 1 Sectional view at point AA.

[0059] Firstly, such as Figure 1 and Figure 2As shown, this application provides an experimental chamber 4, which includes a chamber body 41 and a pressure relief mechanism 42. The chamber body 41 includes a wall panel 411 and a chamber 412 enclosed by the wall panel 411. The chamber 412 is used to accommodate the test piece. The wall panel 411 has an air inlet 413 and an air outlet 414 communicating with the chamber 412. The pressure relief mechanism 42 is disposed on the wall panel 411 and is configured to be actuated to release the internal pressure or temperature of the chamber 412 when the internal pressure or temperature reaches a threshold.

[0060] In the embodiment of this application, the experimental chamber 4 includes a chamber body 41 and a pressure relief mechanism 42. The chamber body 41 includes a wall panel 411 and a chamber 412 enclosed by the wall panel 411. The chamber 412 is used to accommodate the test piece. The wall panel 411 has an air inlet 413 and an air outlet 414 communicating with the chamber 412. The pressure inside the chamber 412 can be adjusted through the air outlet 414 and the air inlet 413 to detect the condition of the test piece under different pressure conditions. The pressure relief mechanism 42 is provided on the wall panel 411. When the test piece inside the chamber 412 is ignited and exploded, causing the pressure or temperature inside the chamber 412 to exceed a threshold, the pressure relief mechanism 42 is actuated to release the internal pressure or temperature of the chamber 412, thereby reducing the damage to the experimental chamber 4 caused by the explosion of the test piece and improving the reliability of the experimental chamber 4.

[0061] For example, the device under test (DUT) can be a single battery cell or an electrode assembly. The test chamber 4 can be used for thermal runaway testing of the DUT.

[0062] For example, the experimental chamber 4 can be a walk-in low-pressure chamber for fire testing.

[0063] Optionally, the experimental chamber 4 in this embodiment is manufactured with reference to GB / T10590-2006 Technical Conditions for High and Low Temperature / Low Pressure Test Chambers; GB / T11159-2008 Technical Conditions for Low Pressure Test Chambers; GB / T10592-2008 Technical Conditions for High and Low Temperature Test Chambers; and GB / T10591-2006 Technical Conditions for High Temperature / Low Pressure Test Chambers.

[0064] The compartment includes a wall panel 411 and a cavity 412 enclosed by the wall panel 411. The wall panel 411 can be made of metal to improve the structural strength of the compartment. The volume and shape of the cavity 412 can be designed according to the actual situation.

[0065] The wall panel 411 is provided with an air inlet 413 and an air outlet 414 that communicate with the chamber 412. The air inlet 413 is connected to an air intake device, and the air outlet 414 is connected to an air extraction device. The internal pressure of the chamber 412 can be adjusted by adjusting the air intake volume of the air inlet 413 and the air extraction volume of the air outlet 414, so that the test piece can be placed in different pressure environments.

[0066] The pressure relief mechanism 42 is mounted on the wall panel 411. When the test piece experiences thermal runaway, causing the internal pressure or temperature of the chamber 412 to reach a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the chamber 412 reaches the predetermined threshold, the pressure relief mechanism 42 performs its action, or a weak structure within the pressure relief mechanism 42 is damaged, thereby creating an opening or channel for the release of internal pressure or temperature. The threshold design varies depending on the design requirements.

[0067] As an example, the pressure relief mechanism 42 can be integrally formed with the wall panel 411; or the pressure relief mechanism 42 can be separately set and connected to the wall panel 411.

[0068] Optionally, the pressure relief mechanism 42 can be a rupture disc or a weakened wall panel. When the internal pressure or temperature of the chamber 412 does not reach the threshold, the test chamber 4 will not experience a decrease in sealing performance due to the installation of the pressure relief mechanism 42. However, when the internal pressure or temperature of the chamber 412 reaches the threshold, the pressure relief mechanism 42 ruptures to rapidly release pressure. The rupture disc has better sealing performance than a safety valve and a faster response speed, enabling it to quickly release pressure when the test piece explodes.

[0069] For example, the rupture disc can be a positive arch rupture disc, an inverted arch rupture disc, a flat plate rupture disc, a graphite rupture disc, etc.

[0070] For example, the pressure relief mechanism 42 can be a DN250 rupture disc with a pressure relief of 0.02 MPa.

[0071] The term "actuation" as used in this application refers to the pressure relief mechanism 42 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the chamber 412. The actions of the pressure relief mechanism 42 may include, but are not limited to: movement of components within the pressure relief mechanism 42 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 42, etc. When the pressure relief mechanism 42 is actuated, the high-temperature, high-pressure substances inside the chamber 412 are discharged outwards from the actuated portion. In this way, the chamber 41 can be depressurized and de-temperatureed under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0072] Optionally, one or more pressure relief mechanisms 42 can be provided on the wall panel 411. The specific specifications of the pressure relief mechanism 42 and the number of pressure relief mechanisms 42 can be designed by the user.

[0073] Optionally, in order to reduce the damage to other devices in the chamber 412 in the event of a combustion explosion of the test piece, the devices in the chamber 412 can be designed to be explosion-proof. For example, explosion-proof lighting, explosion-proof cameras, explosion-proof instruments, and explosion-proof pipelines are installed in the chamber 412.

[0074] Optionally, the pipe connection section 432, instrument, distribution box and other cabinet doors are equipped with electrostatic bridging.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, the wall panel 411 includes an end plate 415, a bottom plate 417 and a side plate 416. The side plate 416 is connected between the end plate 415 and the bottom plate 417. The end plate 415 and the bottom plate 417 are arranged opposite to each other along the first direction X. The air extraction port 414 and the pressure relief mechanism 42 are both provided on the end plate 415.

[0076] In these embodiments, both the air extraction port 414 and the pressure relief mechanism 42 are located on the end plate 415 to improve the compactness of the experimental chamber 4.

[0077] Optionally, the experimental chamber 4 is a walk-in experimental chamber 4, with a door opening on the side panel 416. The door can close into the door opening, and a seal is provided between the door and the door opening to maintain a sealed environment in the chamber 412. The door is connected to the chamber body 41 by a high-strength double hinge. The door opens by rotating outwards and is tightened by multiple handwheels after closing. For example, the door opening size is 2m*2m. For example, the seal is a silicone rubber sealing ring.

[0078] Optionally, the compartment 41 is also equipped with a pressure relief valve, which can be used to regulate the pressure inside the chamber when the hatch is opened. It should be noted that this pressure relief valve is not the pressure relief mechanism 42 in the above embodiment.

[0079] Optionally, the first direction X is the direction of gravity, and the end plate 415 and the bottom plate 417 are arranged opposite each other along the direction of gravity. The high-temperature flue gas from the combustion of the test piece is more easily extracted from the exhaust port 414 provided on the end plate 415, and when the pressure relief mechanism 42 provided on the end plate 415 is braked, the risk of injury to the surrounding operators from the ejected material is relatively small.

[0080] In some embodiments, such as Figure 1 and Figure 2 As shown, the end plate 415 includes a protrusion 431 and a connecting portion 432 that are connected to each other. The connecting portion 432 is connected to the side plate 416. The protrusion 431 is formed by the end plate 415 protruding away from the bottom plate 417. The pressure relief mechanism 42 is provided on the connecting portion 432, and the air extraction port 414 is provided on the protrusion 431.

[0081] In these embodiments, the end plate 415 includes a protrusion 431 and a connecting portion 432 connected to each other. An air extraction port 414 is disposed on the protrusion 431. The protrusion 431 is formed by the end plate 415 protruding away from the bottom plate 417 to gather gas, so that the gas can be extracted from the air extraction port 414. The pressure relief mechanism 42 is disposed on the relatively flat connecting portion 432 to reduce the difficulty of setting the pressure relief mechanism 42.

[0082] The end plate 415 includes a protrusion 431 and a connecting portion 432. The protrusion 431 is connected to the side plate 416, or the protrusion 431 is connected to the side plate 416 through the connecting portion 432.

[0083] The protrusion 431 is formed by the end plate 415 rising away from the bottom plate 417. A groove is formed on the side surface of the protrusion 431 facing the chamber 412. The air extraction port 414 is provided through the bottom of the groove. The gas in the chamber 412 gathers in the groove and is extracted by the air extraction port 414.

[0084] Optionally, the cross-sectional area of ​​the groove gradually decreases along the direction away from the bottom plate 417 to better collect the gas in the chamber 412 and facilitate the gas to be discharged from the exhaust port 414.

[0085] The pressure relief mechanism 42 is located on the connecting part 432, which is flatter than the protrusion 431, so as to reduce the difficulty of setting the pressure relief mechanism 42.

[0086] In some embodiments, such as Figure 1 and Figure 2 As shown, the protrusion 431 is centrally disposed on the end plate 415 in the second direction Y and / or the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0087] In these embodiments, the protrusion 431 is centrally located on the end plate 415 to shorten the distance from the protrusion 431 to each edge of the end plate 415, so as to facilitate the gathering of gas from each part of the chamber 412 to the protrusion 431 and the extraction port 414 to the outside of the chamber 412, thereby improving the reliability of the experimental chamber 4.

[0088] Optionally, the protrusion 431 is centrally located on the end plate 415, the connecting part 432 is surrounding the protrusion 431, and at least two pressure relief mechanisms 42 are located on the connecting part 432 and are evenly spaced around the protrusion 431; or the connecting part 432 is located on both sides of the protrusion 431, and at least two pressure relief mechanisms 42 are evenly spaced on both sides of the connecting part 432 of the protrusion 431.

[0089] Please see Figure 3 , Figure 3 yes Figure 2 A magnified structural diagram at point B in the middle.

[0090] In some embodiments, such as Figures 1 to 3 As shown, the experimental chamber 4 also includes an air intake pipe 43, one end of which is connected to an air inlet 413 and the other end is connected to the external environment. At least two air inlets 413 are spaced apart on the side of the bottom plate 417 facing the chamber 412.

[0091] In these embodiments, the air intake pipe 43 connects the air intake port 413 and the external environment, so that external gas can enter the chamber 412 through the air intake port 413 to regulate the pressure inside the chamber 412. At least two air intake ports 413 are spaced apart on the side of the bottom plate 417 facing the chamber 412, which helps the gas to diffuse quickly and evenly in the chamber 412, so that the pressure change inside the chamber 412 is uniform and the reliability of the experimental chamber 4 is improved.

[0092] Optionally, the arrangement and number of air inlets can be designed by the user. For example, multiple air inlets 413 are evenly distributed in rows and columns along the length and width of the base plate 417.

[0093] Optionally, the wall panel 411 includes a first wall panel 411 and a second wall panel 411 disposed opposite to each other in the thickness direction. The first wall panel 411 is disposed facing the chamber 412. At least two air inlets 413 are disposed on the first wall panel 411 at intervals. The second wall panel 411 is provided with a through hole. An air inlet pipe 43 is disposed between the first wall panel 411 and the second wall panel 411. One end of the air inlet pipe 43 is connected to at least two air inlets 413, and the other end of the air inlet pipe 43 is connected to the through hole, so that external gas can enter the chamber 412 through the through hole, through the air inlet pipe 43, and through the multiple air inlets 413, so that the gas is evenly diffused in the chamber 412.

[0094] In some embodiments, such as Figures 1 to 3 As shown, the wall panel 411 includes an insulation layer 441 and a support layer 442. The insulation layer 441 is disposed on at least one side of the support layer 442 in its thickness direction. The thermal conductivity of the insulation layer 441 is less than that of the support layer 442.

[0095] In these embodiments, the wall panel 411 includes an insulation layer 441 and a support layer 442. The support layer 442 is used to improve the structural strength of the experimental chamber 4. The insulation layer 441 is disposed on at least one side of the support layer 442 in its thickness direction to reduce the risk of damage to the insulation layer 441 when the test piece deflagrates. The thermal conductivity of the insulation layer 441 is less than that of the support layer 442. The insulation layer 441 helps to maintain the temperature inside the chamber 412 and improve the reliability of the experimental chamber 4.

[0096] Optionally, the support layer 442 may be made of stainless steel. For example, the support layer 442 may be made of Q345 high-quality carbon structural steel, 304 stainless steel, or 310S stainless steel.

[0097] Optionally, the insulation layer 441 may be made of one or more of the following materials: fiberglass blanket, ceramic fiber blanket, foam glass, mineral wool, phenolic resin board, rigid polyurethane foam insulation board, etc.

[0098] Optionally, the support layer 442 is used to improve the structural strength of the experimental chamber 4, and the insulation layer 441 is connected to at least a portion of the surface of the support layer 442 on the side away from the chamber 412. For example, the connection method between the insulation layer 441 and the support layer 442 is bonding, snap-fitting, or bolting.

[0099] In some embodiments, such as Figure 1 and Figure 3 As shown, the wall panel 411 includes two support layers 442, which are spaced apart in the thickness direction, and the insulation layer 441 is disposed between the two support layers 442.

[0100] In these embodiments, the wall panel 411 includes two support layers 442 to enhance the structural strength of the experimental chamber 4. The two support layers 442 are spaced apart in their thickness direction, and the insulation layer 441 is disposed between the two support layers 442 to enhance the protective effect of the support layers 442 on the insulation layer 441 and improve the problem that the insulation layer 441 is easily damaged by external forces.

[0101] Optionally, the support layer 442 on the side closer to the chamber 412 is the inner support layer, which is used to improve the structural strength of the cabin 41, and the support layer 442 on the side farther away from the chamber 412 is the outer support layer, which is used to form a sealed chamber 412. For example, the material of the inner support layer is 310S stainless steel, and the material of the outer support layer is 304 stainless steel.

[0102] Optionally, the outer support layer is also equipped with a profile reinforcing rib structure to improve the overall strength of the experimental chamber 4.

[0103] For example, the base plate 417 includes an inner support layer, an outer support layer, and an insulation layer 441 disposed between the two. A plurality of air inlets 413 are opened on the inner support layer, and at least a portion of the air inlet pipe 43 extends within the insulation layer 441.

[0104] In some embodiments, such as Figure 1 and Figure 2 As shown, the experimental chamber 4 also includes a spray mechanism 45. The side surface of the wall panel 411 facing the chamber 412 is provided with a placement area for accommodating the test piece. The spray mechanism 45 is positioned facing the placement area and is used to reduce the temperature of the test piece.

[0105] In these embodiments, the test chamber 4 is provided with a spray mechanism 45 facing the placement area of ​​the test piece. The spray mechanism 45 is used to reduce the temperature of the test piece, thereby reducing the damage to the test chamber 4 caused by the test piece and improving the reliability of the test chamber 4.

[0106] For example, the spray mechanism 45 can cool down and extinguish the fire when the test piece is on fire or explodes.

[0107] Optionally, the spray mechanism 45 is disposed in the chamber 412 and is configured to be activated when the temperature in the chamber 412 reaches a threshold, and the spray mechanism 45 sprays the test piece in the placement area to cool it down.

[0108] Optionally, the spraying mechanism 45 is located in the center of the end plate 415, or the spraying mechanism 45 is located in the angled area between the side plate 416 and the end plate 415, so as to facilitate the spraying mechanism 45 to cool the test piece along the direction of gravity.

[0109] Optionally, the location, shape, and size of the area to be tested can be designed according to the actual situation. For example, the area to be tested is a rectangular area in the center of the base plate 417.

[0110] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of the transparent component of the experimental chamber provided in one embodiment of this application.

[0111] In some embodiments, such as Figure 1 and Figure 4 As shown, the wall panel 411 is provided with an observation hole 463. The experimental chamber 4 also includes a transparent part 46, which covers the observation hole 463. The transparent part 46 includes a body 461 and a corrosion-resistant layer 462. The corrosion-resistant layer 462 is disposed on the side of the body 461 facing the chamber 412.

[0112] In these embodiments, the wall panel 411 is provided with an observation hole 463, and the transparent part 46 covers the observation hole 463 to facilitate observation of the environment inside the chamber 412. The transparent part 46 includes a body 461 and a corrosion-resistant layer 462. The corrosion-resistant layer 462 is disposed on the side of the body 461 facing the chamber 412 to reduce the damage of acidic gas generated by the combustion of the battery cell under test to the transparent part 46 and improve the reliability of the experimental chamber 4.

[0113] Optionally, at least two observation holes 463 are provided through the wall panel 411 to facilitate user observation of the environment inside the chamber 412. For example, the wall panel 411 may be provided with two, three, four, or five observation holes 463.

[0114] Optionally, the observation hole 463 and the transparent part 46 are circular, and the circular transparent part 46 bears pressure evenly and is not easily damaged.

[0115] Optionally, the transparent element 46 includes a body 461, which can be a high-strength double-layer heated tempered glass to improve the problem of excessively low temperature inside the chamber 412 causing frost to form on the transparent element 46 and affecting the observation effect.

[0116] Optionally, the transparent element 46 includes a corrosion-resistant layer 462 disposed on the body 461 to reduce the corrosive effect of acidic gases such as HF generated during the combustion of the test piece on the transparent element 46.

[0117] Optionally, the transparent element 46 is acid-resistant glass; for example, the transparent element 46 is borosilicate glass.

[0118] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of an experimental apparatus provided in one embodiment of this application.

[0119] Secondly, such as Figure 2 and Figure 5 As shown, this application provides an experimental device 1, which includes an air extraction component 2, an air intake component 3, and an experimental chamber 4 as described in the first aspect embodiment above. The air extraction component 2 is connected to an air extraction port 414, and the air intake component 3 is connected to an air intake port 413, so that the air extraction component 2 and the air intake component 3 can adjust the pressure inside the chamber 412.

[0120] In the embodiment of this application, the pressure inside the chamber 412 is adjusted by the air extraction component 2 connected to the air extraction port 414 and the air intake component 3 connected to the air intake port 413, so that the test device 1 can detect the condition of the test piece under different pressures.

[0121] Optionally, a vacuum pump is installed inside the evacuation assembly 2, and a buffer chamber is installed between the evacuation assembly 2 and the evacuation port 414. After the gas in the chamber 412 is extracted from the evacuation port, it first enters the buffer chamber and is then pumped away by the vacuum pump, so as to improve the problem of cold air in the chamber 412 directly entering the evacuation assembly 2 and causing damage to the vacuum pump.

[0122] Optionally, an electric valve is provided between the air extraction assembly 2 and the air extraction port 414, and the air extraction rate of the experimental chamber 4 is adjusted by adjusting the opening degree of the electric valve; an electric valve is provided between the air intake assembly 3 and the air extraction port 414, and the air intake rate of the experimental chamber 4 is adjusted by adjusting the opening degree of the electric valve.

[0123] Optionally, a vacuum check valve is also provided between the electric valve and the evacuation port 414. The vacuum check valve isolates the evacuation assembly 2 and the experimental chamber 4 at the moment of power failure, reducing the risk of backflow of the vacuum pump in the evacuation assembly 2.

[0124] Optionally, the intake assembly 3 is equipped with a compressor, which introduces air into the chamber 412 to regulate the pressure inside the chamber 412.

[0125] Optionally, the experimental apparatus 1 also includes a control component 5, which includes power distribution, measurement and detection, and feedback control functions.

[0126] In some embodiments, such as Figure 2 and Figure 5 As shown, the intake assembly 3 includes an intake pipe 43 and a temperature regulating mechanism. The intake pipe 43 is connected to the intake port 413, and the temperature regulating mechanism is thermally connected to the intake pipe 43. The temperature regulating mechanism is used to regulate the temperature of the gas in the intake pipe 43.

[0127] In these embodiments, the air intake assembly 3 includes an air intake pipe 43 and a temperature regulation mechanism. The temperature regulation mechanism and the air intake pipe 43 are thermally connected to regulate the temperature of the gas inside the air intake pipe 43, thereby regulating the temperature of the environment inside the chamber 412. This allows the experimental device 1 to detect the condition of the test piece under different pressures and temperatures, improving the reliability of the experimental device 1.

[0128] The intake assembly 3 regulates the temperature inside the chamber 412 by introducing temperature-controlled gas into the chamber 412 through a temperature regulation mechanism. For example, the temperature inside the chamber 412 can be adjusted between -30°C and 100°C through the temperature regulation mechanism.

[0129] The temperature control mechanism may include at least one of a heater and a refrigeration evaporator, enabling the temperature control mechanism to regulate the gas temperature within the intake line 43. For example, the heater may be a nickel-chromium alloy heating wire heater.

[0130] In some embodiments, such as Figures 1 to 5As shown, the experimental apparatus 1 includes an air extraction assembly 2, an air intake assembly 3, and an experimental chamber 4. The air extraction assembly 2 is connected to an air extraction port 414. The air intake assembly 3 includes an air intake pipe 43 and a temperature regulating mechanism. The air intake pipe 43 is connected to the air intake port 413. The temperature regulating mechanism is thermally connected to the air intake pipe 43. The temperature regulating mechanism is used to regulate the temperature of the gas in the air intake pipe 43 so that the air extraction assembly 2 and the air intake assembly 3 can regulate the pressure inside the chamber 412. The experimental chamber 4 includes a chamber body 41, a pressure relief mechanism 42, and a spray mechanism 45. The chamber body 41 includes wall panels 411. The chamber 412 is enclosed by a wall panel 411, which includes an end plate 415, a bottom plate 417, and a side plate 416. The side plate 416 is connected between the end plate 415 and the bottom plate 417. The chamber 412 is used to accommodate the test piece. The end plate 415 and the bottom plate 417 are arranged opposite to each other along a first direction X. The end plate 415 includes a protrusion 431 and a connecting portion 432 that are connected to each other. The connecting portion 432 is connected to the side plate 416. The protrusion 431 is formed by the end plate 415 protruding away from the bottom plate 417. The protrusion 431 is also formed in a second direction Y and / or a third direction Z. The test chamber 412 is centrally located on the end plate 415. A pressure relief mechanism 42 is located on the connecting portion 432, and an air extraction port 414 is located on the protrusion 431. The pressure relief mechanism 42 is configured to actuate when the internal pressure or temperature of the chamber 412 reaches a threshold value to release the internal pressure or temperature of the chamber 412. The test chamber 4 also includes an air intake pipe 43, one end of which is connected to an air intake port 413, and the other end is connected to the external environment. At least two air intake ports 413 are spaced apart on the side of the bottom plate 417 facing the chamber 412. The wall panel 411 includes an insulation layer 441. The wall panel 411 includes two support layers 442, and the thermal conductivity of the insulation layer 441 is less than that of the support layer 442. The wall panel 411 includes two support layers 442, which are spaced apart in their thickness direction. The insulation layer 441 is disposed between the two support layers 442. The wall panel 411 is provided with an observation hole 463. The experimental chamber 4 also includes a transparent component 46, which covers the observation hole 463. The transparent component 46 includes a body 461 and a corrosion-resistant layer 462. The corrosion-resistant layer 462 is disposed on the side of the body 461 facing the chamber 412.

[0131] In these embodiments, the test chamber 4 includes a chamber body 41 and a pressure relief mechanism 42. The chamber body 41 includes a wall panel 411 and a chamber 412 enclosed by the wall panel 411. The chamber 412 is used to accommodate the test piece. The wall panel 411 has an air inlet 413 and an air outlet 414 communicating with the chamber 412. The pressure inside the chamber 412 can be adjusted through the air outlet 414 and the air inlet 413 to detect the condition of the test piece under different pressure conditions. The pressure relief mechanism 42 is provided on the wall panel 411. When the test piece inside the chamber 412 is ignited and exploded, causing the pressure or temperature inside the chamber 412 to exceed a threshold, the pressure relief mechanism 42 is actuated to release the internal pressure or temperature of the chamber 412, thereby reducing the damage to the test chamber 4 caused by the explosion of the test piece and improving the reliability of the test chamber 4.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An experimental chamber, characterized in that, include: The chamber includes wall panels and a cavity enclosed by the wall panels, the cavity being used to accommodate the test piece, and the wall panels having an air inlet and an air outlet communicating with the cavity; A pressure relief mechanism is disposed on the wall panel and is configured to be actuated to release the internal pressure or temperature of the chamber when the internal pressure or temperature reaches a threshold.

2. The experimental chamber according to claim 1, characterized in that, The wall panel includes an end plate, a bottom plate, and a side plate. The side plate is connected between the end plate and the bottom plate. The end plate and the bottom plate are arranged opposite to each other along a first direction. The air extraction port and the pressure relief mechanism are both located on the end plate.

3. The experimental chamber according to claim 2, characterized in that, The end plate includes a protrusion and a connecting portion that are connected to each other. The connecting portion is connected to the side plate. The protrusion is formed by the end plate protruding away from the bottom plate. The pressure relief mechanism is disposed in the connecting portion, and the air extraction port is disposed in the protrusion.

4. The experimental chamber according to claim 3, characterized in that, The protrusion is centrally disposed on the end plate in the second direction and / or the third direction, wherein the first direction, the second direction and the third direction intersect each other.

5. The experimental chamber according to any one of claims 2-4, characterized in that, The experimental chamber also includes an air intake pipe, one end of which is connected to the air intake, and the other end of which is connected to the external environment. At least two of the air inlets are spaced apart on the side of the base plate facing the chamber.

6. The experimental chamber according to any one of claims 1-5, characterized in that, The wall panel includes an insulation layer and a support layer, wherein the insulation layer is disposed on at least one side of the support layer in its thickness direction, and the thermal conductivity of the insulation layer is less than that of the support layer.

7. The experimental chamber according to claim 6, characterized in that, The wall panel includes two support layers, which are spaced apart in their thickness direction, and the insulation layer is disposed between the two support layers.

8. The experimental chamber according to any one of claims 1-7, characterized in that, The experimental chamber also includes a spray mechanism. The side surface of the wall panel facing the chamber is provided with a placement area for accommodating the test piece. The spray mechanism is positioned towards the placement area and is used to reduce the temperature of the test piece.

9. The experimental chamber according to any one of claims 1-8, characterized in that, The wall panel has a through-hole for observation, and the experimental chamber also includes a transparent component that covers the observation hole. The transparent component includes a body and a corrosion-resistant layer, the corrosion-resistant layer being disposed on the side of the body facing the cavity.

10. An experimental apparatus, characterized in that, The chamber includes an air extraction assembly, an air intake assembly, and the experimental chamber as described in any one of claims 1-9, wherein the air extraction assembly is connected to the air extraction port, and the air intake assembly is connected to the air intake port, so that the air extraction assembly and the air intake assembly can adjust the pressure inside the chamber.

11. The experimental apparatus according to claim 10, characterized in that, The air intake assembly includes an air intake pipe and a temperature regulating mechanism. The air intake pipe is connected to the air intake port, and the temperature regulating mechanism is thermally connected to the air intake pipe. The temperature regulating mechanism is used to regulate the temperature of the gas in the air intake pipe.

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