Battery thermal runaway eruption trapping device

Abstract

The invention relates to a battery thermal runaway eruption trapping device. The device comprises a reaction container, a first box body, a second box body and a solid phase trapping piece, the reaction container has a mounting cavity; the first box body is accommodated in the mounting cavity, the first box body is provided with a trapping cavity, and a first pressure release valve is arranged on the cavity wall of the trapping cavity; the second box body is contained in the trapping cavity, the second box body is provided with a containing cavity, and a second pressure release valve is arranged on the cavity wall of the containing cavity; the solid phase trapping part is installed on the cavity wall of the containing cavity and used for trapping the solid phase in the eruption matter. A solid phase trapping piece in the second box body is used for trapping large-size particles in the eruption substance, and small-size particles enter the first box body from a second pressure release valve along with a gas phase in the eruption substance, so that part of the small-size particles are deposited on the cavity wall of a trapping cavity; and the remaining fine-size particles enter the reaction container from the first pressure release valve along with the gas phase in the eruption substance and are deposited on the cavity wall of the mounting cavity, so that the solid phase of the battery eruption substance can be completely captured and separated.

Description

Technical Field

[0001] The invention relates to the technical field of power batteries, and in particular to a device for capturing ejecta emitted during thermal runaway of a battery. Background Art

[0002] Lithium-ion batteries may experience thermal runaway under mechanical, thermal, and electrical abuse, which manifests as a violent chain reaction inside the lithium-ion battery, with a large amount of high-temperature particles and gas multiphases ejected from the safety valve, releasing a large amount of heat. By collecting the gaseous and solid products produced by thermal runaway of lithium-ion batteries, and through online and offline tests, we can understand the dangers of lithium-ion batteries releasing products when they are out of control, and thus understand the types and extent of their dangers. This is of great significance for the safe use, transportation, and storage of lithium-ion batteries, especially for accident handling after thermal runaway of lithium-ion batteries and for reducing personnel and property losses. It provides a theoretical basis. However, the current capture equipment cannot capture fine particles in the eruption, which affects the accuracy of judging the composition of the eruption. Summary of the invention

[0003] Based on this, it is necessary to provide a battery thermal runaway ejecta capture device to address the technical problem that existing capture equipment is unable to capture fine particles in the ejecta during battery thermal runaway, which affects the accuracy of judging the composition of the ejecta.

[0004] A battery thermal runaway ejecta capture device, the battery thermal runaway ejecta capture device comprising:

[0005] A reaction vessel having a mounting cavity;

[0006] A first box body is accommodated in the installation cavity, the first box body has a capture cavity, and a first pressure relief valve is provided on the cavity wall of the capture cavity;

[0007] a second box body, which is accommodated in the capture chamber, and has a receiving chamber, wherein the receiving chamber has a preset position for installing the battery, and a second pressure relief valve is arranged on the chamber wall of the receiving chamber; and

[0008] A solid phase capture component is installed on the cavity wall of the accommodating cavity and is located on one side of the preset position. The solid phase capture component is used to capture the solid phase in the ejected material.

[0009] In one embodiment, the solid phase capture element includes at least two layers of first capture nets spaced apart from each other, the first capture nets are connected to the cavity wall of the accommodating cavity, and the aperture of each mesh of the first capture net decreases successively in the direction away from the preset position.

[0010] In one embodiment, the battery thermal runaway ejecta capture device includes a second capture net, which is located on a side of the solid phase capture component close to the preset position, and the aperture of the mesh of the second capture net is larger than the aperture of the mesh of each of the first capture nets, and the second capture net is used to capture the battery debris.

[0011] In one embodiment, each of the first capture nets is used to face the safety valve of the battery installed at the preset position.

[0012] In one of the embodiments, the second pressure relief valve is located in an area close to the preset position.

[0013] In one embodiment, the axes of the first pressure relief valve and the second pressure relief valve coincide with each other.

[0014] In one of the embodiments, the battery thermal runaway ejecta capture device further includes a clamp, which is installed at the preset position and is used to clamp the battery.

[0015] In one of the embodiments, the battery thermal runaway ejecta capture device further includes a runaway trigger, which is mounted on the fixture and is used to trigger the battery thermal runaway.

[0016] In one embodiment, the battery thermal runaway ejecta capture device further comprises:

[0017] a temperature sensor suspended in the mounting cavity; and / or,

[0018] A pressure sensor is installed in the reaction container, and a probe of the pressure sensor extends into the installation cavity.

[0019] In one of the embodiments, the battery thermal runaway ejecta capture device further includes a matching piece and a gas collecting bag. The cavity wall of the mounting cavity is provided with a connecting hole. The matching piece is installed in the connecting hole to control the opening and closing of the connecting hole. The gas collecting bag is used to communicate with the connecting hole to collect gas in the ejecta.

[0020] Beneficial effects:

[0021] The battery thermal runaway ejecta capture device provided in an embodiment of the present invention comprises a reaction vessel, a first box body, a second box body and a solid phase capture member; the reaction vessel has an installation cavity; the first box body is accommodated in the installation cavity, the first box body has a capture cavity, and a first pressure relief valve is provided on the cavity wall of the capture cavity; the second box body is accommodated in the capture cavity, the second box body has a accommodating cavity, the accommodating cavity has a preset position for battery installation, and a second pressure relief valve is provided on the cavity wall of the accommodating cavity; the solid phase capture member is installed on the cavity wall of the accommodating cavity and is located on one side of the preset position, and the solid phase capture member is used to capture the solid phase in the ejecta. In the present application, the battery has thermal runaway in the second box, and the solid phase capture component in the second box captures large-sized particles in the eruption material. Small-sized particles enter the first box along with the gas phase in the eruption material through the second pressure relief valve, and are partially deposited on the cavity wall of the capture cavity and the outer wall of the second box. The remaining fine-sized particles enter the reaction container along with the gas phase in the eruption material through the first pressure relief valve, and are deposited on the cavity wall of the installation cavity and the outer wall of the first box, thereby achieving complete capture and separation of the solid phase of the battery eruption material, thereby improving the accuracy and convenience of judging the composition of the eruption material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0023] Figure 2 A schematic diagram of a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0024] Figure 3 A cross-sectional view of a second box in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0025] Figure 4 A schematic diagram of a first box in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0026] Figure 5 A cross-sectional view of a first box in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0027] Figure 6 A front view of the cooperation between a battery and a fixture in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0028] Figure 7 A top view of the cooperation between a battery and a fixture in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention.

[0029] Figure Number:

[0030] 100-reaction container; 110-installation cavity; 120-matching hole; 130-one-way valve; 140-container door; 150-connecting hole; 200-first box body; 210-capture cavity; 220-first pressure relief valve; 230-first box body; 240-first box cover; 250-box lock; 300-second box body; 310-accommodation cavity; 320-second pressure relief valve; 330-second box body; 340-second box cover; 400-solid phase capture element; 410-first capture net; 510-second capture net; 520-clamp; 530-heating plate; 531-second wire; 540-temperature sensor; 541-first wire; 550-pressure sensor; 560-matching piece; 561-avoidance hole; 562-gas collecting hole; 570-support frame; 600-battery. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] See also Figure 1 and Figure 2 , Figure 1 A cross-sectional view of a battery thermal runaway ejecta capture device provided in one embodiment of the present invention. Figure 2A schematic diagram of a battery thermal runaway ejecta capture device provided by an embodiment of the present invention. The battery thermal runaway ejecta capture device provided by an embodiment of the present invention comprises a reaction vessel 100, a first box body 200, a second box body 300 and a solid phase capture member 400; the reaction vessel 100 has an installation cavity 110; the first box body 200 is accommodated in the installation cavity 110, the first box body 200 has a capture cavity 210, and a first pressure relief valve 220 is provided on the cavity wall of the capture cavity 210; the second box body 300 is accommodated in the capture cavity 210, the second box body 300 has a receiving cavity 310, the receiving cavity 310 has a preset position for installing a battery 600, and a second pressure relief valve 320 is provided on the cavity wall of the receiving cavity 310; the solid phase capture member 400 is installed on the cavity wall of the receiving cavity 310 and is located on one side of the preset position, and the solid phase capture member 400 is used to capture the solid phase in the ejecta.

[0038] Specifically, in the present application, the battery 600 has thermal runaway in the second box 300, and the solid phase capture member 400 in the second box 300 captures large-sized particles in the ejected material, and small-sized particles enter the first box 200 along with the gas phase in the ejected material from the second pressure relief valve 320, thereby partially depositing on the cavity wall of the capture cavity 210 and the outer wall of the second box 300, and the remaining fine-sized particles enter the reaction container 100 along with the gas phase in the ejected material from the first pressure relief valve 220, and deposit on the cavity wall of the installation cavity 110 and the outer wall of the second box 300, thereby achieving complete capture and separation of the solid phase of the ejected material of the battery 600, thereby improving the accuracy and convenience of judging the components of the ejected material. Among them, the battery in this embodiment is a lithium-ion battery.

[0039] See also Figure 1 and Figure 3 , Figure 3 A cross-sectional view of the second box in a battery thermal runaway ejection capture device provided in one embodiment of the present invention. In one embodiment, the solid phase capture member 400 includes at least two layers of first capture nets 410 spaced apart, the first capture nets 410 are connected to the cavity wall of the accommodating cavity 310, and the apertures of the meshes of each first capture net 410 decrease in sequence in the direction away from the preset position.

[0040] Specifically, in the direction away from the preset position, the aperture of the mesh of each first capture net 410 decreases successively, so that each layer of the first capture net 410 can capture the solid phase of particles of different sizes in turn to achieve the separation of the solid phase of particles of different sizes, so as to facilitate the subsequent study of the composition of the solid phase of particles of different sizes, thereby improving the adaptability of the solid phase capture element 400.

[0041] Furthermore, the solid phase capturing member 400 is located below a preset position, that is, below the battery 600 , so that solid phase particles of different sizes can be captured on different layers of the first capturing net 410 .

[0042] See also Figure 1 and Figure 3 In one embodiment, the battery thermal runaway ejecta capture device includes a second capture net 510, which is located on a side of the solid phase capture element 400 close to a preset position. The aperture of the mesh of the second capture net 510 is larger than the aperture of the mesh of each first capture net 410, and the second capture net 510 is used to capture battery 600 debris.

[0043] Specifically, the aperture of the mesh of the second capture net 510 is larger than the aperture of the mesh of the top first capture net 410, and the second capture net 510 is located above the solid phase capture member 400. When the battery 600 is in thermal runaway, the battery 600 debris can be captured by the second capture net 510, and the solid phase in the eruption passes through the holes in the second capture net 510 and is captured by the first capture net 410, thereby improving the accuracy of the captured solid phase in the eruption.

[0044] Among them, when the battery 600 is in thermal runaway, the liquid phase in the eruption will adhere to the first capture net 410, the second capture net 510 or the wall of the accommodating chamber 310. The collected solid phase products can be heated by distillation to capture the mixed liquid phase products therein to achieve the collection of the liquid phase in the eruption.

[0045] See also Figure 1 In one embodiment, the solid phase capture member 400 is used to face the safety valve of the battery 600 installed at a preset position, so that the ejected material ejected through the safety valve can first move toward the first capture net 410 and the second capture net 510, so that the second capture net 510 can capture the battery 600 debris and the first capture net 410 can capture the solid phase of particles of different sizes, and then flow out from the second pressure relief valve 320, thereby improving the reliability of the battery thermal runaway ejected material capture device.

[0046] See also Figure 1 In one embodiment, the second pressure relief valve 320 is located in an area close to a preset position.

[0047] Specifically, during the thermal runaway of the battery 600, the air pressure in the area near the battery 600 is the highest. By setting the second pressure relief valve 320 in an area close to the preset position, the second pressure relief valve 320 can be opened in time to avoid the explosion of the second box 300, thereby improving the safety of the battery thermal runaway ejecta capture device.

[0048] Furthermore, there are two second pressure relief valves 320, which are located on both sides of the preset position, so as to facilitate the discharge of gas in the accommodating cavity 310 and further improve the safety of the battery thermal runaway ejection capture device. Figure 1 Taking an example for illustration, the two second pressure relief valves 320 are respectively located on the left and right sides of the preset position.

[0049] See also Figure 1 and Figure 3 In one embodiment, the second box body 300 includes a second box cover 340 and a second box body 330. One end of the second box cover 340 is rotatably connected to the second box body 330, and the other end is connected to the second box body 330 by a lock, so that the second box cover 340 is convenient to open and close relative to the second box body 330, so as to facilitate the installation of the battery 600 and the removal of the solid phase captured by the solid phase capture member 400, and to achieve the sealing of the accommodating chamber 310. Among them, the preset position and the second pressure relief valve 320 are arranged on the second box cover 340, and the first capture net 410 is installed on the second box body 330 and is detachably connected to the second box body 330, so as to facilitate the collection of solid phases of particles of different sizes.

[0050] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 , Figure 4 A schematic diagram of a first box in a battery thermal runaway ejecta capture device provided in one embodiment of the present invention. Figure 5 A cross-sectional view of a first box in a battery thermal runaway ejecta capture device according to an embodiment of the present invention. In one embodiment, the axes of the first pressure relief valve 220 and the second pressure relief valve 320 coincide with each other.

[0051] Specifically, when the second pressure relief valve 320 is opened, the gas in the accommodating chamber 310 will enter the capturing chamber 210 through the second pressure relief valve 320, and the air pressure near the second pressure relief valve 320 is the largest. By coinciding the axes of the first pressure relief valve 220 and the second pressure relief valve 320, the first pressure relief valve 220 can be opened in time to avoid the explosion of the first box body 200, thereby improving the safety of the battery thermal runaway ejecta capture device.

[0052] See also Figure 1 , Figure 4 and Figure 5In one embodiment, the first box body 200 includes a first box cover 240 and a first box body 230. One end of the first box cover 240 is rotatably connected to the first box body 230, and the other end is connected to the first box body 230 through a box lock 250, so that the first box cover 240 can be opened and closed relative to the first box body 230, so as to facilitate the installation of the first box body 200 and the removal of the solid phase deposited on the wall of the capture chamber 210, and to achieve the sealing of the capture chamber 210. The first pressure relief valve 220 is installed on the first box cover 240.

[0053] See also Figure 1 , Figure 6 and Figure 7 , Figure 6 A front view of the battery 600 and the fixture 520 in the battery thermal runaway ejecta capture device provided in one embodiment of the present invention. Figure 7 A top view of a battery 600 and a clamp 520 in a battery thermal runaway ejecta collection device provided in one embodiment of the present invention. In one embodiment, the battery thermal runaway ejecta collection device further includes a clamp 520, which is installed at a preset position and is used to clamp the battery 600.

[0054] Specifically, the clamp 520 is used to fix the battery 600 at a preset position of the second box body 300, so that the battery 600 can stably perform thermal runaway in the accommodating cavity 310, avoiding the battery 600 from moving and affecting the separation of the solid phase of particles of different sizes.

[0055] See also Figure 1 , Figure 6 and Figure 7 In one embodiment, the battery thermal runaway ejecta capture device further includes a runaway trigger, which is mounted on the fixture 520 and is used to trigger the thermal runaway of the battery 600 .

[0056] Specifically, the out-of-control trigger includes a heating plate 530 and a power source. The heating plate 530 is attached to the battery 600 and is clamped to one side of the battery 600 by the clamp 520. The heating plate 530 is electrically connected to the power source to heat the battery 600 and trigger the thermal runaway of the battery 600. The heating plate 530 is led out of the reaction vessel 100 through the second wire 531 to be electrically connected to the power source outside the reaction vessel 100, thereby improving the safety of the battery thermal runaway ejecta capture device. It should be noted that when the battery 600 is in thermal runaway, the heating plate 530 stops heating the battery 600.

[0057] See also Figure 1 In one embodiment, the battery thermal runaway ejecta capture device further includes a support frame 570 , which is disposed in the capture chamber 210 and is used to support the second box body 300 .

[0058] See also Figure 1 In one embodiment, the battery thermal runaway ejecta capture device further includes a temperature sensor 540, and the temperature sensor 540 is suspended in the mounting cavity 110. The temperature sensor 540 is used to detect the temperature of the gas in the reaction vessel 100, so as to determine whether the reaction vessel 100 can be opened to collect the solid phase in the ejecta. If the temperature of the gas in the reaction vessel 100 is too high, it will cause harm to the operator, and if the temperature of the gas in the reaction vessel 100 is too low, it will affect the efficiency of collecting the ejecta of the battery 600. The first wire 541 connected to the temperature sensor 540 is led out of the reaction vessel 100.

[0059] See also Figure 1 In one embodiment, the pressure sensor 550 is installed in the reaction container 100, and the probe of the pressure sensor 550 extends into the installation cavity 110. The pressure sensor 550 is used to detect the pressure in the reaction container 100 to prevent the air pressure in the reaction container 100 from being too high when the reaction container 100 is opened, thereby preventing the operator from being injured.

[0060] See also Figure 1 and Figure 2 In one embodiment, the battery thermal runaway ejecta capture device further includes a matching piece 560 and a gas collecting bag. A connecting hole 150 is provided on the cavity wall of the mounting cavity 110. The matching piece 560 is installed in the connecting hole 150 to control the opening and closing of the connecting hole 150. The gas collecting bag is used to communicate with the connecting hole 150 to collect gas in the ejecta.

[0061] Specifically, when the values ​​displayed by the pressure sensor 550 and the temperature sensor 540 reach preset values, the gas collection bag can be connected to the connection hole 150 by operating the fitting 560, so as to collect the gas phase in the eruption when the battery 600 thermally runs away.

[0062] Among them, the matching piece 560 has two avoidance holes 561, and the first wire 541 and the second wire 531 are led out of the reaction vessel 100 through the two avoidance holes 561. It should be noted that a sealing plug is provided on the avoidance hole 561 to ensure the sealing of the installation cavity 110. The matching piece 560 has an air collecting hole 562 connected to the installation cavity 110, and an adjustment block is provided on the air collecting hole 562. The adjustment block is used to seal the air collecting hole 562. When the air collecting bag is connected to the matching piece 560, the adjustment block is controlled so that the air collecting bag is connected to the installation cavity 110 through the air collecting hole 562, thereby facilitating air collection. Among them, the adjustment block is a stud, and a sealing gasket is provided on the stud. Preferably, the matching piece 560 is a branch line flange.

[0063] It should be noted that the air collection bag can be installed on the matching component 560 when air collection is needed, and can also be installed on the matching component 560 in advance.

[0064] See also Figure 1 and Figure 2 In one embodiment, the reaction container 100 is further provided with a matching hole 120 , and a one-way valve 130 is installed on the matching hole 120 . After the gas collecting bag collects the gas phase, the gas in the reaction container 100 can be discharged by controlling the one-way valve 130 .

[0065] Furthermore, the reaction container 100 also has a container door 140, so as to facilitate installation and removal of the first box body 200 and the second box body 300 in the installation cavity 110. Preferably, the reaction container 100 is a constant volume pressure container.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A battery thermal runaway ejecta capture device, characterized in that: The battery thermal runaway ejecta capture device comprises: A reaction vessel having a mounting cavity; A first box body is accommodated in the installation cavity, the first box body has a capture cavity, and a first pressure relief valve is provided on the cavity wall of the capture cavity; a second box body, which is accommodated in the capture chamber, and has a receiving chamber, wherein the receiving chamber has a preset position for installing the battery, and a second pressure relief valve is arranged on the chamber wall of the receiving chamber; and A solid phase capture component is installed on the cavity wall of the accommodating cavity and is located on one side of the preset position. The solid phase capture component is used to capture the solid phase in the ejected material.

2. The battery thermal runaway ejecta capture device according to claim 1, characterized in that: The solid phase capture element comprises at least two layers of first capture nets spaced apart from each other, the first capture nets being connected to the cavity wall of the accommodating cavity, and the apertures of the meshes of each of the first capture nets decreasing in sequence in a direction away from the preset position.

3. The battery thermal runaway ejecta capture device according to claim 2, characterized in that: The battery thermal runaway ejecta capture device includes a second capture net, which is located on a side of the solid phase capture component close to the preset position. The aperture of the mesh of the second capture net is larger than the aperture of the mesh of each of the first capture nets, and the second capture net is used to capture the battery debris.

4. The battery thermal runaway ejecta capture device according to claim 2, characterized in that: Each of the first capturing nets is used to face the safety valve of the battery installed at the preset position.

5. The battery thermal runaway ejecta capture device according to any one of claims 1 to 4, characterized in that: The second pressure relief valve is located in an area close to the preset position.

6. The battery thermal runaway ejecta capture device according to any one of claims 1 to 4, characterized in that: The axes of the first pressure relief valve coincide with the axes of the second pressure relief valve.

7. The battery thermal runaway ejecta capture device according to any one of claims 1 to 4, characterized in that: The battery thermal runaway ejecta capture device further comprises a clamp, which is installed at the preset position and is used to clamp the battery.

8. The battery thermal runaway ejecta capture device according to claim 7, characterized in that: The battery thermal runaway ejecta capture device further includes a runaway trigger component, which is mounted on the fixture and is used to trigger the battery thermal runaway.

9. The battery thermal runaway ejecta capture device according to any one of claims 1 to 4, characterized in that: The battery thermal runaway ejecta capture device further comprises: a temperature sensor suspended in the mounting cavity; and / or, A pressure sensor is installed in the reaction container, and a probe of the pressure sensor extends into the installation cavity.

10. The battery thermal runaway ejecta capture device according to any one of claims 1 to 4, characterized in that: The battery thermal runaway ejecta capture device also includes a matching piece and a gas collection bag. The cavity wall of the installation cavity is provided with a connecting hole. The matching piece is installed in the connecting hole to control the opening and closing of the connecting hole. The gas collection bag is used to communicate with the connecting hole to collect gas in the ejecta.

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