Gas-collecting battery thermal runaway test device

Abstract

The invention relates to the technical field of batteries, and provides a gas collection type battery thermal runaway test device which comprises a test box body, a gas collection box and a receiving device, a test inner cavity used for placing a battery is formed in the test box body, and a plurality of gas collection holes communicated with the test inner cavity are formed in the test box body; the gas collecting holes are formed in at least two different side surfaces of the test box body; a plurality of gas inlet channels and a control device for controlling the connection or disconnection of each gas inlet channel are arranged on the gas collection tank, and the gas inlet channels and the gas collection holes are in one-to-one correspondence and are communicated with each other; the receiving device comprises an access port, and the access port is detachably connected with the output end of the air inlet channel. According to the scheme, the gas generated by thermal runaway of the battery can be collected and analyzed at different positions and different stages, so that more valuable reference data can be provided for subsequent performance design of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a gas-collecting battery thermal runaway test device. Background Art

[0002] Lithium-ion batteries have advantages such as high voltage and high energy density, and their applications are becoming more and more extensive, such as electric vehicles, electronic products, energy storage, etc. The safety problem of lithium-ion batteries is mainly caused by thermal runaway. High temperature, short circuit, overcharge and discharge, puncture, extrusion, vibration, etc. are important causes of thermal runaway of lithium-ion batteries. Thermal runaway of lithium-ion batteries at high temperatures produces gas. Gas analysis is one of the important means to study the mechanism of thermal runaway of batteries.

[0003] At present, the schemes for collecting gas from thermal runaway of lithium-ion batteries are to collect and study the erupting gas in a centralized manner after the thermal runaway of lithium-ion batteries is triggered in a closed container. However, after these devices collect the gas in a centralized manner, they can usually only analyze specific components, and the analysis dimension is relatively single. There are still great reference limitations for improving the safety of battery packs after thermal runaway of lithium-ion batteries, as well as designing harmless and purification schemes for erupting gases. Summary of the invention

[0004] In order to overcome at least one disadvantage of the above-mentioned prior art, the purpose of the present application is to provide a gas-collecting battery thermal runaway test device.

[0005] The technical means adopted by this application to solve the above technical problems are:

[0006] The present application provides a gas collection type battery thermal runaway test device, comprising:

[0007] A test box, wherein the test box is provided with a test inner cavity for placing batteries, and the test box is provided with a plurality of air collecting holes communicating with the test inner cavity, and the air collecting holes are arranged on at least two different sides of the test box;

[0008] An air collecting box, wherein the air collecting box is provided with a plurality of air inlet channels and a control device for controlling the connection or disconnection of each of the air inlet channels, and the air inlet channels correspond to the air collecting holes one by one and are connected to each other;

[0009] A receiving device includes an access port, and the access port is detachably connected to the output end of the air inlet passage.

[0010] In the embodiment scheme of the present application, by setting up the test box, it is convenient to provide the test cavity, so as to facilitate the battery thermal runaway test; and by setting up the several gas collecting holes, it is convenient to collect the gas generated by the battery thermal runaway from multiple positions, and to conduct a multi-dimensional analysis of the battery thermal runaway gas, so as to obtain more valuable reference information; by setting up the gas collecting box, the gas collection process can be controlled, so as to improve the degree of automation in the collection process; and by setting up the receiving device, it is convenient to collect and store the gas, or directly analyze the gas parameters.

[0011] In some embodiments, the test box includes a lower box and a cover, and the cover is detachably disposed on the lower box to form the test inner cavity;

[0012] The sealing cover is sealed to the lower box body.

[0013] In the embodiment of the present application, the lower box body and the cover are provided to facilitate the installation and arrangement of the battery in the test cavity, and the operation can be more convenient.

[0014] In some embodiments, the air collecting hole is provided on the sealing cover.

[0015] In the embodiment of the present application, by providing the gas collecting hole on the cover, it is convenient to collect the gas above the battery, so that the analysis of the gas can be more comprehensive.

[0016] In some embodiments, a plurality of hanging rings are provided on the cover.

[0017] In the embodiment of the present application, the lifting ring is provided to facilitate the movement of the entire test box after assembly, making it more convenient to use.

[0018] In some embodiments, the air collecting holes are disposed on the outer side surfaces of the lower box body, and at least one air collecting hole is disposed on a single outer side surface of the lower box body.

[0019] In the embodiment of the present application, by providing the gas collecting holes on multiple outer surfaces of the lower box body, it is convenient to collect the gas erupted by thermal runaway from multiple different positions, so as to better understand the distribution characteristics of the gas during thermal runaway of the battery.

[0020] In some embodiments, an exhaust pipe is disposed on the lower box body, and a pressure relief valve is disposed on the exhaust pipe.

[0021] In the embodiment of the present application, the pressure relief valve is provided to facilitate the control of the pressure inside the test box, thereby avoiding distortion caused by excessive internal pressure of the test box and damage to other components.

[0022] In some embodiments, the exhaust pipe is provided with a connection structure for connecting to an external device.

[0023] In the embodiment of the present application, by providing the connection structure on the exhaust pipe, it is possible to facilitate the connection and use of external equipment with the exhaust pipe, such as a gas purification device, so that the internal gas of the test box can be purified through the exhaust pipe.

[0024] In some embodiments, a plurality of wire holes are provided on the outer side surface of the lower box body.

[0025] In the embodiment of the present application, the wire-through hole is provided to facilitate the insertion and installation of the electrical connection wire, thereby facilitating the control of the thermal runaway state of the battery.

[0026] In some embodiments, the control device includes an electric control board and a plurality of control valves, wherein the control valves are arranged in communication with the air intake passage, and the control valves are electrically connected to the electric control board;

[0027] The gas collecting box is provided with a data line socket, and the data line socket is electrically connected to the electric control board.

[0028] In the embodiment of the present application, by setting up the control device, it is possible to easily control the connectivity and application of each of the air intake channels, so that corresponding control strategies can be matched according to different collection requirements.

[0029] In some embodiments, a plurality of baffle plates are disposed on the air collecting box, so that a temporary storage chamber is formed on both sides of the baffle plates, and the output end of the air intake channel is disposed in the temporary storage chamber.

[0030] In the embodiment scheme of the present application, the temporary storage chamber is set up to facilitate the temporary placement of the gas collection device, so that the gas collection device can collect gas through the air inlet channel and then transfer the collected gas, which is more reliable and flexible to use.

[0031] In some embodiments, the receiving device includes a plurality of air collecting bags, and the access port is arranged on the air collecting bags.

[0032] In the embodiment of the present application, by configuring the receiving device to be in the form of a gas collecting bag, gas can be collected and stored as required, thereby facilitating the application of the collected gas for other analysis needs.

[0033] In some embodiments, the receiving device includes a gas chromatograph, and the access port is provided on the gas chromatograph.

[0034] In the embodiment of the present application, by configuring the receiving device to be an application form of a gas chromatograph, the collected gas can be directly analyzed as required to obtain target data.

[0035] In some embodiments, a buffer tank is provided between the gas chromatograph and the gas collecting box.

[0036] In the embodiment of the present application, the buffer tank is provided to facilitate buffering of the collected gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a system schematic diagram of a gas-collectible battery thermal runaway test device according to one example of the present application.

[0039] Figure 2 This is a schematic diagram of the structure of a test box according to one example of this application.

[0040] Figure 3 This is a schematic diagram of the structure of a test box according to one example of this application.

[0041] Figure 4 This is a schematic structural diagram of an air collecting box according to an example of the present application.

[0042] Figure 5 This is a schematic structural diagram of an air collecting box according to an example of the present application.

[0043] Figure 6 This is a system flow diagram of a gas-collectible battery thermal runaway test device according to one example of the present application.

[0044] Marking Description:

[0045] 1-test box, 10-air collecting hole, 11-lower box, 111-exhaust pipe, 112-wire hole, 12-cover, 121-lifting ring,

[0046] 2-air collecting box, 21-air inlet channel, 22-electric control board, 23-control valve, 24-data line socket, 25-air pump, 26-blocking plate,

[0047] 31- access port, 32- gas collecting bag, 33- gas chromatograph,

[0048] 4- Industrial computer,

[0049] 5- Buffer tank. DETAILED DESCRIPTION

[0050] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0051] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] At present, with the increase in market demand for new energy vehicles, the safety performance of new energy vehicles in use has gradually received widespread attention from the society. Accidents such as fire and explosion caused by thermal runaway of lithium-ion batteries are also one of the concerns of people. Among them, lithium-ion batteries will produce gas before and after thermal runaway, and the gas composition and content released at different stages directly reflect the degree of side reactions inside the battery, which is closely related to the health and safety status of the battery. More importantly, the battery pack is the first place where thermal runaway occurs in the battery. It is particularly important to obtain the distribution and flow direction of the gas generated by the lithium-ion battery during thermal runaway in order to reduce the hazards of thermal runaway of the lithium-ion battery. Modeling and analyzing the gas composition at different stages and positions during thermal runaway of the lithium-ion battery is of great significance to the safety of the battery pack after thermal runaway of the lithium-ion battery, as well as the design of a harmless gas solution for the gas generated at different stages.

[0053] In view of the above technical problems, the purpose of the present embodiment is to provide a gas-collecting battery thermal runaway test device, which can collect battery thermal runaway gases at different positions and stages, thereby facilitating the analysis and modeling of the gases collected at each stage, thereby providing more valuable reference data for the performance design of power batteries.

[0054] like Figures 1 to 6 As shown, this embodiment provides a gas collection type battery thermal runaway test device, including:

[0055] A test box 1, wherein the test box 1 is provided with a test inner cavity for placing batteries, and the test box 1 is provided with a plurality of air collecting holes 10 communicating with the test inner cavity, and the air collecting holes 10 are arranged on at least two different sides of the test box 1;

[0056] The air collecting box 2 is provided with a plurality of air inlet channels 21 and a control device for controlling the connection or disconnection of each of the air inlet channels 31. The air inlet channels 31 correspond to the air collecting holes 10 one by one and are connected to each other.

[0057] The receiving device comprises an access port 31 , and the access port 31 is detachably connected to the output end of the air inlet passage 21 .

[0058] In some embodiments, the test cavity is a closed cavity during the test, which is used to simulate the working environment of the battery in actual application. It can be understood that the battery used for the test can be set as a single one, or a module composed of multiple battery cells for testing; the battery can be a hard shell battery or a soft pack battery, which is not specifically limited here.

[0059] The test box 1 can be used to provide the test cavity, so as to facilitate the battery thermal runaway test; and the plurality of gas collecting holes 10 can be arranged to collect the gas generated by the battery thermal runaway from multiple positions, so as to facilitate the multi-dimensional analysis of the battery thermal runaway gas, and obtain more valuable reference information; the gas collecting box 2 can be arranged to control the gas collection process, so as to improve the degree of automation in the collection process; and the receiving device can be arranged to facilitate the collection and storage of the gas, or to directly analyze the gas parameters.

[0060] As an example of one application, Figures 1 to 3 As shown, the test box 1 comprises a lower box 11 and a cover 12, and the cover 12 is detachably arranged on the lower box 11 to form the test inner cavity;

[0061] The sealing cover 12 is sealed to the lower box body 11 .

[0062] In some embodiments, the lower box 11 and the cover 12 are both made of metal, so as to better simulate the actual application conditions of the battery. Therefore, the material of the lower box 11 and the cover 12 can be selected according to the material of the battery pack in actual application.

[0063] In some embodiments, the size of the test inner cavity is consistent with or close to the inner cavity size of the battery pack during actual use.

[0064] In some embodiments, an annular groove is provided on the fitting surface between the lower box body 11 and the cover 12, and a sealing ring is embedded in the annular groove to improve the sealing performance between the cover 12 and the lower box body 11 after assembly.

[0065] In some embodiments, the cover 12 is mounted on the lower box body 11 by fasteners such as bolts.

[0066] In some embodiments, the cover 12 and the lower box body 11 are fixedly installed and conveniently disassembled after installation by a clamping mechanism such as a toggle clamp.

[0067] The lower box body 11 and the cover 12 can facilitate the installation and arrangement of the battery in the test cavity, making the operation more convenient.

[0068] As an example of one application, Figure 2 , Figure 3 As shown, the air collecting hole 10 is provided on the sealing cover 12 .

[0069] In some embodiments, the air collecting hole 10 is provided at one on the cover 12 and is located at the center of the cover 12 .

[0070] In some embodiments, a plurality of the air collecting holes 10 are provided on the cover 12 , and the plurality of air collecting holes 10 are arranged on the cover 12 according to design requirements.

[0071] By providing the gas collecting hole 10 on the cover 12, it is convenient to collect the gas above the battery. Compared with the single-path collection method in traditional technology, the collection and analysis of the gas can be more comprehensive.

[0072] As an example of one application, Figure 2 , Figure 3 As shown, the cover 12 is provided with a plurality of hanging rings 121 .

[0073] In some embodiments, the cover 12 in a rectangular shape is used as an example for illustration, and the hanging ring 121 is provided at a corner end of the cover 12 .

[0074] The suspension ring 121 can facilitate the movement of the entire test box 1 after assembly, making it more convenient to use.

[0075] As an example of one application, Figure 2 , Figure 3 As shown, the air collecting holes 10 are arranged on the outer sides of the lower box body 11 , and at least one air collecting hole 10 is arranged on a single outer side of the lower box body 11 .

[0076] In some embodiments, the lower box body 11 is set in a rectangular shape for example. At this time, one of the air collecting holes 10 is set on each of the four outer sides of the lower box body 11, and each of the air collecting holes 10 is respectively set at the center position of the outer side surface of the lower box body 11.

[0077] In some embodiments, a plurality of the air collecting holes 10 are disposed on a single outer side surface of the lower box body 11 . In this case, the plurality of air collecting holes 10 are arranged on the outer side surface of the lower box body 11 according to design requirements.

[0078] By arranging the gas collecting holes 10 on multiple outer surfaces of the lower box body 11, it is convenient to collect the gas erupted by thermal runaway from multiple different positions and according to different stage requirements, so as to better understand the distribution characteristics of the gas during thermal runaway of the battery.

[0079] As an example of one application, Figure 1 , Figure 3 As shown, the lower box body 11 is provided with an exhaust pipe 111 , and the exhaust pipe 111 is provided with a pressure relief valve.

[0080] In some embodiments, the exhaust pipe 111 is connected to one outer side of the lower box body 11, so the air collecting hole 10 located on the outer side can be opened on the exhaust pipe 111. Figure 3 shown.

[0081] In some embodiments, a pressure relief valve is provided on the exhaust pipe 111 .

[0082] By providing the pressure relief valve, the pressure in the test box 1 can be easily controlled to avoid distortion of test data caused by excessive pressure inside the test box 1 and damage to other components.

[0083] As an application example, the exhaust pipe 111 is provided with a connection structure for connecting with an external device.

[0084] In some embodiments, the connection structure is a threaded structure disposed at the end of the exhaust pipe 111 .

[0085] In some embodiments, the external device includes a gas purification device, a temperature detection device, etc. Here, the specific structural forms of the gas purification device and the temperature detection device can be referred to the prior art and will not be described in detail here.

[0086] By providing the connection structure on the exhaust pipe 111, it is convenient to connect external equipment with the exhaust pipe 111; such as a gas purification device, so that the internal gas of the test box 1 can be purified through the exhaust pipe 111; and such as a temperature detection device, so that the box temperature can be detected by the temperature detection device.

[0087] As an example of one application, Figure 2 As shown, a plurality of wire holes 112 are provided on the outer side surface of the lower box body 11 .

[0088] In some embodiments, a plurality of the wire holes 112 are provided and are centrally arranged on one outer side of the lower box body 11 to facilitate the arrangement of the lines.

[0089] In some embodiments, at least one of the wire holes 112 is used for inserting a heating wire to heat the battery to be tested.

[0090] In some embodiments, at least one of the wire holes 112 is used for inserting a voltage detection wire to facilitate detection of the voltage of the battery to be tested.

[0091] In some embodiments, at least one of the wire holes 112 is used for inserting a temperature detection wire to facilitate detecting the temperature of the battery to be tested.

[0092] In some embodiments, at least one of the wire holes 112 is used for inserting a gas concentration detection wire to facilitate detection of the gas concentration in the test box 1 .

[0093] By setting the wire-through hole 112, various electrical connection wires can be easily inserted and installed. At the same time, the sealing of various electrical connection wires should be ensured when they are inserted into the wire-through hole 112. By inserting the various electrical connection wires, various electrical devices located in the test cavity can be powered, thereby facilitating the control of the thermal runaway state of the battery and the detection of various design parameters.

[0094] As an example of one application, Figure 4 , Figure 5As shown, the control device includes an electric control board 22 and a plurality of control valves 23. The control valves 23 are connected to the air intake passage 21 and are electrically connected to the electric control board 22.

[0095] The air collecting box 2 is provided with a data line socket 24 , and the data line socket 24 is electrically connected to the electric control board 22 .

[0096] In some embodiments, the number of the air intake channels 21 corresponds one-to-one to the number of the air collecting holes 10 , and the number of the control valves 23 corresponds one-to-one to the number of the air intake channels 21 , thereby facilitating independent control of the air intake channels 21 through the control valves 23 .

[0097] In some embodiments, an air pump 25 is further provided on the air collecting box 2 , and the air pump 25 is connected to the air inlet channel 21 .

[0098] In some embodiments, the air collecting box 2 is connected to the industrial computer 4 via the data line socket 24 , so that the operation of the air collecting box 2 can be controlled by the industrial computer 4 .

[0099] In some embodiments, the operation of the air collecting box 2 is controlled by PLC+LABview.

[0100] By setting up the control device, it is possible to control the connectivity and application of each of the air intake channels 21, so that corresponding control strategies can be matched according to different collection requirements.

[0101] As an example of one application, Figure 4 , Figure 5 As shown, a plurality of baffles 26 are disposed on the air collecting box 2, so that a temporary storage chamber is formed on both sides of the baffles 26, and the output end of the air intake channel 21 is disposed in the temporary storage chamber.

[0102] By setting up the temporary storage chamber, it is convenient to temporarily place the gas collection device, so that the gas collection device can collect gas through the air inlet channel and then transfer the collected gas, which is more reliable and flexible in use.

[0103] As an example of one application, Figure 1 As shown, the receiving device includes a plurality of air collecting bags 32 , and the access port 31 is arranged on the air collecting bags 32 .

[0104] In some embodiments, the gas collecting bag 32 can be used as the above-mentioned gas collection device.

[0105] By configuring the receiving device to be in the form of a gas collecting bag 32, gas can be collected and stored as required, thereby facilitating the application of the collected gas for other analysis requirements.

[0106] As an example of one application, Figure 1 As shown, the receiving device includes a gas chromatograph 33 , and the gas chromatograph 33 is provided with the access port 31 .

[0107] By configuring the receiving device as an application form of a gas chromatograph 33, the collected gas can be directly analyzed as required to obtain target data.

[0108] As an example of one application, Figure 1 As shown, a buffer tank 5 is provided between the gas chromatograph 33 and the gas collecting box 2 .

[0109] By providing the buffer tank 5, the collected gas can be easily buffered.

[0110] As an example of one application, Figure 6 As shown, when performing the test operation, the battery is first heated by the heating plate, and the temperature of the battery is raised to trigger the occurrence of thermal runaway, and then the heating is stopped. Afterwards, the gas collecting hole 10 for gas collection operation can be selected according to the predetermined battery voltage, battery temperature, box temperature, gas volume and eruption degree and other parameters, including the location of the gas collecting hole 10, the time point of gas collection, the number of gas collection, etc. For gas analysis items that need to be temporarily stored, they can be collected and stored by the gas collecting bag 32; and in one of the application schemes, the collected gas can be directly analyzed by the gas chromatograph 33 to obtain relevant gas data.

[0111] By extracting and analyzing the gases at different positions and stages in the test chamber, it is possible to construct a gas flow field model for the eruption after thermal runaway of the battery, and then simulate the flow of various gases in the battery pack after the battery module has thermal runaway in the battery pack. This is important for reducing the internal danger of the battery pack during thermal runaway and for designing a targeted purification scheme for the gas ejected from the battery pack.

[0112] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0113] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A gas-collecting battery thermal runaway test device, characterized in that: include: A test box, wherein the test box is provided with a test inner cavity for placing batteries, and the test box is provided with a plurality of air collecting holes communicating with the test inner cavity, and the air collecting holes are arranged on at least two different sides of the test box; An air collecting box, wherein the air collecting box is provided with a plurality of air inlet channels and a control device for controlling the connection or disconnection of each of the air inlet channels, and the air inlet channels correspond to the air collecting holes one by one and are connected to each other; A receiving device includes an access port, and the access port is detachably connected to the output end of the air inlet passage.

2. The gas-collectible battery thermal runaway test device according to claim 1, characterized in that: The test box includes a lower box and a cover, and the cover is detachably arranged on the lower box to form the test inner cavity; The sealing cover is sealed to the lower box body.

3. The gas-collectible battery thermal runaway test device according to claim 2, characterized in that: The sealing cover is provided with the air collecting hole.

4. The gas-collectible battery thermal runaway test device according to claim 3, characterized in that: The sealing cover is provided with a plurality of hanging rings.

5. The gas-collectible battery thermal runaway test device according to any one of claims 2 to 4, characterized in that: The air collecting holes are arranged on the outer sides of the lower box body, and at least one air collecting hole is arranged on a single outer side of the lower box body.

6. The gas-collectible battery thermal runaway test device according to claim 5, characterized in that: The lower box body is provided with an exhaust pipe, and the exhaust pipe is provided with a pressure relief valve.

7. The gas-collectible battery thermal runaway test device according to claim 6, characterized in that: The exhaust pipe is provided with a connection structure for connecting with external equipment.

8. The gas-collectible battery thermal runaway test device according to claim 5, characterized in that: A plurality of wire holes are arranged on the outer side surface of the lower box body.

9. The gas-collectible battery thermal runaway test device according to any one of claims 1, 7 and 8, characterized in that: The control device comprises an electric control board and a plurality of control valves, wherein the control valves are arranged in communication with the air intake passage and are electrically connected to the electric control board; The gas collecting box is provided with a data line socket, and the data line socket is electrically connected to the electric control board.

10. The gas-collectible battery thermal runaway test device according to claim 9, characterized in that: A plurality of baffle plates are arranged on the air collecting box, so that a temporary storage chamber is formed on both sides of the baffle plates, and the output end of the air intake channel is arranged in the temporary storage chamber.

11. The gas-collectible battery thermal runaway test device according to claim 1 or 10, characterized in that: The receiving device comprises a plurality of air collecting bags, and the access port is arranged on the air collecting bags.

12. The gas-collectible battery thermal runaway test device according to claim 1 or 10, characterized in that: The receiving device comprises a gas chromatograph, and the gas chromatograph is provided with the access port.

13. The gas-collectible battery thermal runaway test device according to claim 12, characterized in that: A buffer tank is provided between the gas chromatograph and the gas collecting box.

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