Battery thermal runaway testing device

Abstract

The utility model relates to a battery thermal runaway testing device. The battery thermal runaway testing device comprises a main body provided with a testing cavity; the at least one group of ports are arranged on the main body and are used for connecting wire harnesses inside and outside the main body; and the protection mechanism is arranged in the test cavity and can shield at least one group of ports. When a thermal runaway test is carried out on the single battery in the test cavity to generate eruptions such as high-temperature gas, particulate matters, electrolyte and the like, the protection mechanism shields the port, so that the eruptions can be resisted, the contact between the eruptions and the port is reduced, the damage and corrosion of the port are reduced, and the data reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery thermal runaway, and in particular to a battery thermal runaway testing device. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] When a battery cell is undergoing a thermal runaway test, it will emit high-temperature gas, particulate matter, electrolyte, etc. Therefore, in order to ensure the safety of the test, a battery thermal runaway test box is provided in the related art, which can accommodate battery cells so that the thermal runaway test of the battery cells can be safely carried out in the box.

[0004] The battery thermal runaway test box is usually equipped with some ports for collecting temperature, voltage, air pressure, etc., but the ports are easily damaged and corroded by high-temperature gases, particulate matter, electrolyte, etc. ejected from the battery cells, resulting in abnormal data. Utility Model Content

[0005] In view of the problem, the present application provides a battery thermal runaway testing device that can alleviate the problem of abnormal data caused by port damage and corrosion.

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

[0007] a main body having a test cavity;

[0008] at least one set of ports provided on the main body and used to connect wiring harnesses inside and outside the main body; and

[0009] The protection mechanism is arranged in the test cavity and can shield at least one group of ports.

[0010] In this way, when the battery cell is subjected to a thermal runaway test in the test chamber and produces ejecta such as high-temperature gas, particulate matter, and electrolyte, the protective mechanism is shielded at the port and can therefore resist the ejecta, reduce the contact between the ejecta and the port, and thereby reduce damage and corrosion to the port, thereby improving data reliability.

[0011] In some embodiments, the outer surface of the guard mechanism is a spherical surface.

[0012] Since the outer surface of the protection mechanism facing the test cavity is spherical, when the battery cell ejects ejecta, the spherical surface can reduce the impact force generated when contacting the ejecta, and can guide the ejecta to smoothly leave the outer surface of the protection mechanism, thereby improving the protection reliability of the protection mechanism.

[0013] In some embodiments, the guard mechanism includes a metal guard mechanism capable of shielding at least one set of ports.

[0014] The metal protection mechanism has the functions of high temperature resistance and corrosion resistance, and therefore is not easily damaged during battery cell testing, thereby increasing the service life of the protection mechanism.

[0015] In some embodiments, the protection mechanism is recessed toward a side away from the port to form a protection groove.

[0016] Since the port needs to be matched with the terminal connected to the wiring harness in the test cavity, the setting of the protection groove provides a space for accommodating the terminal and the wiring harness, improves the reliability of the connection between the terminal and the port, and improves the reliability of protection.

[0017] In some embodiments, the protection mechanism includes a protection cover having a protection groove formed on a side of the protection cover facing the port, and the protection cover is disposed on at least one group of ports.

[0018] The protective cover has a simple structure and can provide a protective groove. The protective cover can also completely cover the port, thereby improving the reliability of port protection.

[0019] In some embodiments, a sealing member is further provided between the protective cover and the main body, and a closed protective cavity is formed between the protective cover, the main body and the sealing member.

[0020] Since the port is arranged on the main body, when the protective cover is arranged on the port, a fitting gap is formed between the end face of the protective cover and the main body, and the sealing member can seal the fitting gap between the protective cover and the main body to reduce the risk of the ejecta entering the protective cover through the gap and corroding the port.

[0021] In some embodiments, at least one of the protective cover and the sealing member has a wire outlet channel, and the wire outlet channel connects the protective cavity and the test cavity.

[0022] Since the port needs to be matched with the terminal, and the terminal is connected to the wire harness and introduced into the test cavity, providing an outlet channel on the protective cover or the seal can help lead the wire harness out to the test cavity.

[0023] In some embodiments, the shielding mechanism can be rotatably connected to the main body to switch between a shielding position shielding the port and a revealing position revealing the port.

[0024] The protection mechanism is rotatably connected to the main body to switch between the shielding position and the revealing position, which simplifies the operation process.

[0025] In some embodiments, the battery thermal runaway testing device further includes a locking mechanism, and when the protection mechanism is in the shielding position, the locking mechanism is used to lock the protection mechanism to the main body.

[0026] When the protection mechanism is in the shielding position, the protection mechanism is locked to the main body by the locking mechanism, so that the protection mechanism can be kept in the shielding position even under the action of external force until the locking mechanism is unlocked. Therefore, the locking mechanism can improve the reliability of the protection mechanism protecting the port.

[0027] In some embodiments, the material of the port includes any one of ceramic, resin, glass, mica, and gypsum.

[0028] Ceramics, resins, glass, mica or gypsum all have good temperature resistance and insulation properties, and therefore can increase the service life of the port in the test cavity, reduce the frequency of port replacement and port maintenance, and improve data accuracy and test efficiency.

[0029] In some embodiments, the port includes a collection port, and the collection port is used to collect any one of temperature, voltage, air pressure, and battery cell parameters.

[0030] Since the battery thermal runaway test device is a device used to study and measure the changes in temperature and pressure in the cavity during the thermal runaway process of the battery in order to calculate the amount of thermal runaway gas released, the protection of the collection port can improve the accuracy of data collection and thus improve the accuracy of the test.

[0031] In some embodiments, each group of ports includes a plurality of ports, and a label is set at the position of each port.

[0032] By setting a label at each port, the ports can be standardized so that when the operator replaces the terminal, a corresponding prompt can be given, so that the operator can quickly insert the terminal into the corresponding port, thereby improving the replacement efficiency of the operator.

[0033] In some embodiments, the main body includes a tank body and a cover body disposed on the tank body, and all ports and protective mechanisms are disposed on the cover body.

[0034] Compared with the tank body, the cover body is movable and the operator can operate on it more easily, so it is easier to detect the port or replace the terminal and wiring harness connected to the port.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 It is a schematic structural diagram of a protection mechanism in a battery thermal runaway test device according to one or more embodiments when the protection mechanism is in an exposed position.

[0038] Figure 2 for Figure 1 A partial enlarged schematic diagram of the battery thermal runaway test device shown.

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the battery thermal runaway test device when the protection mechanism is in the shielding position.

[0040] Figure 4 for Figure 3 A cross-sectional schematic diagram of a partial structure of a battery thermal runaway test device is shown.

[0041] The reference numerals in the specific implementation manner are as follows:

[0042] Battery thermal runaway testing device 100 , main body 10 , testing cavity 11 , tank body 12 , cover body 13 , port 20 , protection mechanism 30 , protection groove 31 , sealing member 40 , protection cavity 45 , outlet channel 50 , locking mechanism 60 . DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, 1 and / or 2 may represent: 1 exists alone, 1 and 2 exist at the same time, and 2 exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0049] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] When the battery cells in the battery are undergoing thermal runaway testing, if the exothermic reaction inside the battery is uncontrollable, the heat generated by the reaction will further promote the exothermic reaction, which may cause combustion or even explosion. In addition, the occurrence of thermal runaway of the battery is also accompanied by the destruction of the internal structure of the battery. A series of chemical reactions will occur between the electrode materials and the electrolyte, producing a large amount of gas. The gas is both toxic and explosive, which is extremely dangerous. In addition, the gas is difficult to completely dissipate in a confined space in a short period of time, and the smell lingers for a long time, which poses a safety and health hazard to the testers who subsequently enter the test site for on-site cleaning.

[0052] Therefore, battery cell testing is generally carried out in a safety room or test box with explosion-proof function to avoid damage to personnel caused by combustion or explosion. Usually, in order to study and measure the changes in cavity temperature and pressure during thermal runaway of the battery to calculate the amount of thermal runaway gas released, a plurality of ports for connecting the wiring harness inside and outside the box are set on the test box. Since the box is closed, when the battery cell thermal runaway emits high-temperature gas, particulate matter, electrolyte and other ejecta, the port is easily damaged and corroded by them, resulting in data abnormality. In addition, since the port is usually fixed to the test box by a flange, if the port is damaged, replacing it after each test will greatly increase the workload.

[0053] In order to alleviate the problem that the ports of the test box in the related art are easily damaged and corroded by the ejecta generated by the thermal runaway of the battery cell, resulting in abnormal data, a battery thermal runaway test device is designed in the embodiment of the present application, including a main body, at least one group of ports and a protective mechanism. The main body has a test cavity, at least one group of ports is arranged on the main body and is used to connect the wiring harness inside and outside the main body, and the protective mechanism is arranged in the test cavity and can shield at least one group of ports.

[0054] In this way, when the battery cell undergoes a thermal runaway test in the test chamber and generates ejecta such as high-temperature gas, particulate matter, and electrolyte, the protective mechanism is shielded at the port and is thus able to resist the ejecta, reduce the contact between the ejecta and the port, and thereby reduce damage and corrosion to the port, thereby improving data reliability.

[0055] Figure 1 is a schematic structural diagram of a protection mechanism in a battery thermal runaway test device according to one or more embodiments when the protection mechanism is in an exposed position. Figure 2 for Figure 1 The enlarged schematic diagram of the battery thermal runaway test device at point A is shown. Figure 3 for Figure 1 The schematic diagram of the structure of the battery thermal runaway test device when the protection mechanism is in the shielding position is shown in the attached Figures 1 to 3The embodiment of the present application provides a battery thermal runaway test device 100, including a main body 10, at least one group of ports 20 and a protective mechanism 30. The main body 10 has a test cavity 11, at least one group of ports 20 is provided on the main body 10 and is used to connect the wiring harness inside and outside the main body 10, and the protective mechanism 30 is provided in the test cavity 11 and can shield at least one group of ports 20.

[0056] The main body 10 refers to the test main body of the battery thermal runaway test device 100, which can realize the basic function of the battery thermal runaway test. Specifically, the main body 10 may include a box body and a can body to form a test cavity to accommodate the battery cells.

[0057] The port 20 can be connected to the wiring harness inside and outside the main body 10 through the terminal matched therewith. The port 20 can be a collection port for collecting the temperature, voltage, and air pressure of the test cavity 11, and can also collect the parameters of the battery cell to monitor the status of the battery cell. In addition, the port 20 can also be a charging and discharging port connected to the battery cell, a power supply port connected to the heating device, etc., which is not specifically limited.

[0058] Each group of ports 20 in the embodiment of the present application may have a plurality of ports 20 , and each port 20 may be integrated on a port integration board, with the ports 20 being arranged at intervals.

[0059] The protection mechanism 30 is a mechanism that can protect the port 20. The protection function is not limited to resisting the eruption generated by the thermal runaway of the battery cell in the test cavity 11. When protecting the port 20, the protection mechanism 30 can completely block the outside of the port 20, or only block part of the outside of the port 20.

[0060] In this way, when the battery cell is subjected to a thermal runaway test in the test chamber 11 and produces ejecta such as high-temperature gas, particulate matter, and electrolyte, the protective mechanism 30 is shielded at the port 20 and can therefore resist the ejecta and reduce the contact between the ejecta and the port 20, thereby reducing damage and corrosion to the port 20 and improving data reliability.

[0061] See also Figure 1 and Figure 2 According to some embodiments of the present application, the outer surface of the protection mechanism 30 is a spherical surface. Since the outer surface of the protection mechanism 30 facing the test cavity 11 is a spherical surface, when the battery cell ejects the ejection material, the spherical surface can reduce the impact force generated when it contacts the ejection material, and can guide the ejection material to smoothly leave the outer surface of the protection mechanism 30, thereby improving the protection reliability of the protection mechanism 30. In other embodiments, the outer surface of the protection mechanism 30 can also be a plane or other irregular surface.

[0062] According to some embodiments of the present application, the protection mechanism 30 includes a metal protection mechanism, which can shield at least one group of ports 20. The metal protection mechanism has high temperature resistance and corrosion resistance, so it is not easily damaged during battery cell testing, thereby increasing the service life of the protection mechanism 30. Specifically, the material of the metal protection mechanism can be carbon steel, stainless steel, titanium alloy or cast iron.

[0063] See also Figure 1 and Figure 2 According to some embodiments of the present application, the protection mechanism 30 is recessed toward a side away from the port 20 to form a protection groove 31. Since the port 20 needs to be matched with the terminal connected with the wiring harness in the test cavity 11, the setting of the protection groove 31 provides a space for accommodating the terminal and the wiring harness, thereby improving the reliability of the connection between the terminal and the port 20 and improving the reliability of the protection.

[0064] Specifically, the protection mechanism 30 includes a protection cover, which has a protection groove 31, which is formed on one side of the protection cover facing the port 20, and the protection cover is provided at at least one group of ports 20. The structure of the protection cover is simple, and the protection groove 31 can be provided. The protection cover can also completely cover the port 20, thereby improving the reliability of the protection of the port 20. In some embodiments, the protection cover is in a hollow hemispherical shape.

[0065] See also Figure 1 , Figure 2 and Figure 4 According to some embodiments of the present application, a seal 40 is further provided between the protective cover and the main body 10, and a closed protective cavity 45 is formed between the protective cover, the main body 10 and the seal 40. Since the port 20 is provided on the main body 10, when the protective cover is provided on the port, a matching gap is formed between the end face of the protective cover and the main body 10, and the seal 40 can seal the matching gap between the protective cover and the main body 10 to reduce the risk of the ejecta entering the protective cover from the gap and corroding the port 20.

[0066] Specifically, the sealing member 40 includes a sealing ring, the shape of which matches the shape of the opening at the end face of the protective cover. For example, the shape of the opening at the end face of the protective cover is circular, and the sealing ring is also circular.

[0067] Optionally, the seal 40 includes an elastic seal, which can be elastically deformed by the extrusion force between the main body 10 and the protective cover to seal the gap. Specifically, the elastic seal can be made of silicone rubber, fluororubber, polytetrafluoroethylene, etc. The temperature resistance of silicone rubber, fluororubber, and polytetrafluoroethylene is above 100°C, thereby improving the sealing performance of the seal 40 in the test cavity 11.

[0068] See also Figure 1 and Figure 2According to some embodiments of the present application, at least one of the protective cover and the sealing member 40 has a wire outlet channel 50, and the wire outlet channel 50 connects the protective cavity 45 and the test cavity 11. Since the port 20 needs to be matched with the terminal, and the terminal is connected to the wire harness and introduced into the test cavity 11, the wire outlet channel 50 is provided on the protective cover or the sealing member 40 to help the wire harness be led out to the test cavity 11.

[0069] In addition, in order to reduce the risk of the ejection entering the protective cavity 45 from the outlet channel 50 and corroding the port 20, in the embodiment of the present application, a sealing structure, such as a sealing ring, can also be provided in the outlet channel 50. The sealing ring can be detachable relative to the protective cover or the sealing member 40 to facilitate replacement after testing, thereby reducing the ejection remaining on the sealing ring from flowing to the port 20. The material of the sealing ring can be the same as that of the sealing member 40, and the details will not be repeated.

[0070] See also Figure 1 and Figure 3 According to some embodiments of the present application, the protection mechanism 30 is rotatably connected to the main body 10 to switch between a shielding position at which the port 20 is shielded and an exposing position at which the port 20 is exposed.

[0071] The rotation connection means that the protection mechanism 30 can rotate around the axis relative to the main body 10. During the rotation process, the protection mechanism 30 can switch from the shielding position to the exposed position, or from the exposed position to the shielding position. The shielding position can be used when the battery thermal runaway test device 100 is in the state of testing, and the exposed position can expose the port 20, which can be used when the battery thermal runaway test device 100 is not in the state of testing, so as to facilitate the plugging and unplugging of the terminal or the replacement of components.

[0072] The protection mechanism 30 is rotatably connected to the main body 10 to switch between the shielding position and the revealing position, which simplifies the operation process.

[0073] Specifically, a hinge may be provided between the protection mechanism 30 and the main body 10 to achieve relative rotation. In other embodiments, the protection mechanism 30 may also be detachable relative to the main body 10. When the protection mechanism 30 is covered on the port 20, the protection mechanism 30 may be installed on the main body 10 to achieve protection of the port 20.

[0074] See also Figure 1 and Figure 3 Furthermore, the battery thermal runaway testing device 100 also includes a locking mechanism 60 . When the protection mechanism 30 is in the shielding position, the locking mechanism 60 is used to lock the protection mechanism 30 to the main body 10 .

[0075] The locking mechanism 60 is a device for fixing parts or components together. When the protection mechanism 30 is in the shielding position, the protection mechanism 30 is locked to the main body 10 by the locking mechanism 60, so that the protection mechanism 30 can be kept in the shielding position even under the action of external force until the locking mechanism 60 is unlocked. Therefore, the locking mechanism 60 can improve the reliability of the protection mechanism 30 in protecting the port 20.

[0076] Specifically, the locking mechanism 60 may be a bolt locking mechanism, a snap locking mechanism, or a latch locking mechanism.

[0077] According to some embodiments of the present application, the material of the port 20 includes any one of ceramic, resin, glass, mica or gypsum. Ceramics, resin, glass, mica or gypsum have good temperature resistance and insulation performance, so the service life of the port in the test cavity 11 can be increased, the frequency of replacing the port 20 and the number of times of maintenance of the port 20 are reduced, and data accuracy and test efficiency are improved.

[0078] According to some embodiments of the present application, the port 20 includes a collection port, which is used to collect any one of temperature, voltage, air pressure, and battery cell parameters. Since the battery thermal runaway test device 100 is a device for studying and measuring the changes in the temperature and pressure in the cavity during the thermal runaway of the battery to calculate the amount of thermal runaway gas released, the accuracy of data collection can be improved by protecting the collection port, thereby improving the accuracy of the test.

[0079] See also Figure 2 According to some embodiments of the present application, each group of ports 20 includes a plurality of ports, and a label is set at the position of each port 20.

[0080] The label may be a number such as 1, 2, 3, or an English letter such as a, b, c, or other recognizable mark. By setting a label at each port 20, the ports 20 can be standardized, so that when the operator replaces the terminal, a corresponding prompt can be given, so that the operator can quickly insert the terminal into the corresponding port 20, thereby improving the replacement efficiency of the operator.

[0081] See also Figure 1 and Figure 2 According to some embodiments of the present application, the main body 10 includes a tank body 12 and a cover body 13 covered on the tank body 12 , and all ports 20 and the protection mechanism 30 are disposed on the cover body 13 .

[0082] Compared with the tank body 12 , the cover body 13 is movable, and the operator can operate on it more easily, so it is easier to detect the port 20 or replace the terminal and the wire harness connected to the port 20 .

[0083] In an embodiment of the present application, the battery thermal runaway test device 100 may include multiple groups of ports 20 and multiple protection mechanisms 30 . The multiple ports 20 are arranged at intervals from each other, and each protection mechanism 30 cooperates with a group of ports 20 .

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery thermal runaway test device, characterized in that: include: a main body having a test cavity; at least one set of ports, provided on the main body and used to connect wiring harnesses inside and outside the main body; as well as The protection mechanism is arranged in the test cavity and can shield at least one group of the ports.

2. The battery thermal runaway test device according to claim 1, characterized in that: The outer surface of the protection mechanism is a spherical surface.

3. The battery thermal runaway test device according to claim 1, characterized in that: The protection mechanism comprises a metal protection mechanism, and the metal protection mechanism is capable of shielding at least one group of the ports.

4. The battery thermal runaway test device according to claim 1, characterized in that: The protection mechanism is recessed toward a side away from the port to form a protection groove.

5. The battery thermal runaway test device according to claim 4, characterized in that: The protection mechanism comprises a protection cover having the protection groove, the protection groove is formed on a side of the protection cover facing the port, and the protection cover is arranged to cover at least one group of the ports.

6. The battery thermal runaway test device according to claim 5, characterized in that: A sealing member is also provided between the protective cover and the main body, and a closed protective cavity is formed between the protective cover, the main body and the sealing member.

7. The battery thermal runaway test device according to claim 6, characterized in that: At least one of the protective cover and the sealing member has a wire outlet channel, and the wire outlet channel communicates with the protective cavity and the test cavity.

8. The battery thermal runaway testing device according to any one of claims 1 to 7, characterized in that: The protection mechanism can be rotatably connected to the main body to switch between a shielding position for shielding the port and an exposing position for exposing the port.

9. The battery thermal runaway test device according to claim 8, characterized in that: The battery thermal runaway testing device further includes a locking mechanism, and when the protection mechanism is in the shielding position, the locking mechanism is used to lock the protection mechanism to the main body.

10. The battery thermal runaway test device according to any one of claims 1 to 7, characterized in that: The material of the port includes any one of ceramic, resin, glass, mica and gypsum.

11. The battery thermal runaway test device according to any one of claims 1 to 7, characterized in that: The port includes a collection port, and the collection port is used to collect any one of temperature, voltage, air pressure, and battery cell parameters.

12. The battery thermal runaway test device according to any one of claims 1 to 7, characterized in that: Each group of ports includes a plurality of ports, and a label is set at the position of each port.

13. The battery thermal runaway test device according to any one of claims 1 to 7, characterized in that: The main body comprises a tank body and a cover body arranged on the tank body, and all the ports and the protection mechanism are arranged on the cover body.

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