Transportation device for particle emissions after thermal runaway of lithium battery

Abstract

The invention discloses a lithium battery thermal runaway particle emission transportation device, which comprises a test container, which is suitable for accommodating a lithium battery and is provided with a puncture passing port, a cable passing port and an emission passing port; the puncture device is provided with a puncture piece, and the puncture piece is suitable for penetrating through the puncture port to puncture the lithium battery; the cable penetrates through the cable passing opening to be connected with the lithium battery and is suitable for triggering thermal runaway of the lithium battery; the pipeline is connected with the discharge port; the sampler is connected with the pipeline, an air extracting pump is arranged on the sampler, and the air extracting pump is suitable for extracting air at a preset flow so that the sampler can collect emissions after thermal runaway of the lithium battery; and the particle counter is connected with the pipeline and is suitable for recording the concentration of the particulate matters. According to the conveying device for the particle emissions after the thermal runaway of the lithium battery, the particle emissions can be conveniently and quantitatively analyzed, and the conveying device has the advantages of being high in accuracy, high in applicability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal runaway testing of lithium batteries, and in particular to a device for transporting particle emissions after thermal runaway of lithium batteries. Background Art

[0002] Electric vehicles have been widely used in the automotive field due to their economic and environmental characteristics. Lithium batteries have excellent properties such as high energy density and specific energy capacity, and are the first choice for electric vehicle power sources. With the widespread use of lithium batteries, they are prone to thermal runaway under conditions of thermal abuse, mechanical abuse, and electrical abuse, resulting in frequent fires in electric vehicles. Lithium batteries will emit particulate emissions during thermal runaway. Particulate emissions are a potential source of fire hazard, and they can easily cause fires when in contact with external combustibles. At the same time, particulate emissions may contain polluting elements, which can easily cause harm to the ecology and environment.

[0003] When a lithium battery experiences thermal runaway, the internal temperature can reach up to 920°C, and the temperature of the emitted particle emissions can reach up to 700°C. The size of the particle emissions ranges from micrometers to millimeters. The particle emissions contain a variety of heavy metals and toxic elements. In-depth research on the particle emissions generated by thermal runaway of lithium batteries is crucial to ensure the safe use of lithium batteries and environmental protection.

[0004] The related technology studies the particle emissions after thermal runaway of lithium batteries by collecting and analyzing the inhalable particulate matter emitted after thermal runaway of lithium batteries through a filter membrane. However, only a portion of the emissions can be roughly collected, and it is difficult to comprehensively and quantitatively analyze the characteristics of the inhalable particulate matter, which affects the accuracy of the analysis results. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a device for transporting particulate emissions after thermal runaway of a lithium battery, which can facilitate quantitative analysis of particulate emissions and has the advantages of high accuracy and strong applicability.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the present invention, a device for transporting particulate emissions after thermal runaway of a lithium battery is proposed, the device comprising: a test container, the test container is suitable for accommodating a lithium battery, the test container is provided with a puncture opening, a cable opening and a discharge opening; a puncture device, the puncture device has a puncture member, the puncture member is suitable for puncturing the lithium battery through the puncture opening; a cable, the cable is connected to the lithium battery through the cable opening and is suitable for triggering thermal runaway of the lithium battery; a pipeline, the pipeline is connected to the discharge opening; a sampler, the sampler is connected to the pipeline, the sampler is provided with an air pump, the air pump is suitable for pumping air at a predetermined flow rate so that the sampler can collect the emissions after the thermal runaway of the lithium battery; a particle counter, the particle counter is connected to the pipeline and is suitable for recording the concentration of particulate matter.

[0007] The device for transporting particulate emissions after thermal runaway of a lithium battery according to an embodiment of the present invention can facilitate quantitative analysis of particulate emissions and has the advantages of high accuracy and strong applicability.

[0008] In addition, the device for transporting particulate matter emitted by a lithium battery after thermal runaway according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the cable includes a heating wire and a conducting wire, wherein the heating wire is suitable for being connected to the lithium battery and for triggering thermal runaway of the lithium battery through thermal abuse, and the conducting wire is suitable for being electrically connected to the lithium battery and for triggering thermal runaway of the lithium battery through electrical abuse.

[0010] According to one embodiment of the present invention, the pipeline includes: a transfer tube, one end of which is connected to the discharge port; a variable-section pipeline, one end of which is connected to the other end of the transfer tube, and the inner diameter of the end of the variable-section pipeline close to the transfer tube is smaller than the inner diameter of the end far from the transfer tube; a cooling air duct, one end of the cooling air duct is connected to the other end of the variable-section pipeline, and the other end of the cooling air duct is connected to the sampler.

[0011] According to one embodiment of the present invention, the transition pipe and the discharge port are connected by welding, and the variable-section pipe is connected by welding to the transition pipe.

[0012] According to one embodiment of the present invention, the particle counter is connected to the cooling air duct via a dilution device, and the dilution device is suitable for diluting the emissions after thermal runaway of the lithium battery.

[0013] According to one embodiment of the present invention, the particle counter is connected to the dilution device via a rubber hose, and the dilution device is connected to the cooling air duct via a rubber hose.

[0014] According to an embodiment of the present invention, the test container is made of stainless steel.

[0015] According to an embodiment of the present invention, the cable is connected to a temperature measuring device, and the temperature measuring device is suitable for detecting the temperature of the lithium battery.

[0016] According to an embodiment of the present invention, the puncture opening is located on the upper surface of the test container, and the puncture opening is circular and suitable for an infrared camera to capture the thermal runaway process of the lithium battery through the puncture opening.

[0017] According to one embodiment of the present invention, a gasket is provided under the test container.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of the structure of a device for transporting particulate emissions after thermal runaway of a lithium battery according to an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the partial structure of a device for transporting particulate emissions after thermal runaway of a lithium battery according to an embodiment of the present invention.

[0022] Figure numerals: device for transporting particle emissions after thermal runaway of a lithium battery 1, test container 10, puncture port 11, cable port 12, discharge port 13, gasket 14, puncture device 20, puncture member 21, cable 30, pipeline 40, transfer tube 41, variable-section pipeline 42, cooling air duct 43, sampler 50, particle counter 60, dilution device 70, rubber hose 80. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The following describes a device 1 for transporting particulate matter emitted from a lithium battery after thermal runaway according to an embodiment of the present invention with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the device 1 for transporting particulate emissions after thermal runaway of a lithium battery according to an embodiment of the present invention includes a test container 10 , a puncture device 20 , a cable 30 , a pipeline 40 , a sampler 50 and a particle counter 60 .

[0028] The test container 10 is suitable for accommodating lithium batteries, and the test container 10 is provided with a puncture port 11, a cable port 12 and a discharge port 13. The puncture device 20 has a puncture member 21, and the puncture member 21 is suitable for puncturing the lithium battery through the puncture port 11. The cable 30 is connected to the lithium battery through the cable port 12 and is suitable for triggering thermal runaway of the lithium battery. The pipeline 40 is connected to the discharge port 13. The sampler 50 is connected to the pipeline 40, and the sampler 50 is provided with an air pump, and the air pump is suitable for pumping air at a predetermined flow rate so that the sampler 50 collects the emissions after the thermal runaway of the lithium battery. The particle counter 60 is connected to the pipeline 40 and is suitable for recording the concentration of particulate matter.

[0029] It can be understood by those skilled in the art that the “predetermined flow rate” is the air extraction flow rate required for the experiment, and those skilled in the art can adjust it according to actual needs.

[0030] Specifically, the test container 10 has a certain space therein and is suitable for accommodating lithium batteries of different models. The cable 30 can trigger thermal runaway of the lithium battery through thermal abuse and / or electrical abuse. The piercing member 21 can trigger thermal runaway of the lithium battery by piercing the lithium battery to cause an internal short circuit of the lithium battery. The sampler 50 is a particulate matter sampler suitable for collecting particulate emissions.

[0031] It should be understood that only a very small portion of the emissions will enter the particle counter 60 to reflect the current particle emission concentration, and the impact on the quantitative analysis of the sampler 50 is negligible.

[0032] The lithium battery to be tested is placed in the test container 10, and the piercing member 21 or the cable 30 is used to induce thermal runaway of the lithium battery. After the thermal runaway of the lithium battery, emissions are generated in the test container 10. The vacuum pump of the sampler 50 draws air at a predetermined flow rate, and the emissions after the thermal runaway of the lithium battery are extracted from the test container 10 through the pipe 40, so that the sampler 50 collects the emissions after the thermal runaway of the lithium battery to facilitate quantitative analysis of the emissions, and the particle counter 60 records the particle concentration in real time.

[0033] According to the device 1 for transporting particulate emissions after thermal runaway of a lithium battery according to the embodiment of the present invention, by providing a puncture device 20 and a cable 30, thermal runaway of the lithium battery can be induced in different ways, which is convenient for testing and studying the thermal runaway conditions of the lithium battery, and for testing and studying the similarities and differences of emissions caused by different ways after thermal runaway, so as to standardize the use of lithium batteries and can be applicable to different types of lithium batteries, thus avoiding the situation where thermal runaway is difficult to trigger in a certain way, and improving the applicability of the device 1 for transporting particulate emissions after thermal runaway of a lithium battery.

[0034] Furthermore, by providing a sampler 50 and arranging an exhaust pump on the sampler 50 so that the exhaust pump exhausts air at a predetermined flow rate, the sampler 50 can be used to collect emissions after thermal runaway of the lithium battery, thereby facilitating quantitative analysis of the emissions and analyzing the characteristics of the emissions. Compared with the method of collecting emissions by filter membrane in related technologies, the collected emissions can be more comprehensive, facilitating quantitative analysis of the emissions, and improving the accuracy and reliability of the analysis.

[0035] In addition, by setting up the particle counter 60, the particle counter 60 can be used to record the concentration of particulate matter in real time, which is convenient for analyzing the concentration changes of lithium battery particle emissions and further facilitates the standardization of the use of lithium batteries.

[0036] Therefore, the device 1 for transporting particulate emissions after thermal runaway of a lithium battery according to the embodiment of the present invention can facilitate quantitative analysis of particulate emissions and has the advantages of high accuracy and strong applicability.

[0037] The following describes a device 1 for transporting particulate matter emitted from a lithium battery after thermal runaway according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0038] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the device 1 for transporting particulate emissions after thermal runaway of a lithium battery according to an embodiment of the present invention includes a test container 10 , a puncture device 20 , a cable 30 , a pipeline 40 , a sampler 50 and a particle counter 60 .

[0039] Specifically, the cable 30 includes a heating wire and a conductor, wherein the heating wire is suitable for being connected to the lithium battery and for triggering thermal runaway of the lithium battery through thermal abuse, and the conductor is suitable for being electrically connected to the lithium battery and for triggering thermal runaway of the lithium battery through electrical abuse. This can facilitate triggering thermal runaway of the lithium battery through different methods of thermal abuse or electrical abuse, which can not only further improve the applicability of the device 1 for transporting particulate emissions after thermal runaway of the lithium battery, but also can further facilitate studying the similarities and differences of particulate emissions under different thermal runaway conditions.

[0040] Furthermore, the cable 30 is connected with a temperature measuring device, which is suitable for detecting the temperature of the lithium battery, so that the temperature of the lithium battery can be detected and recorded in real time, and the thermal runaway process of the lithium battery can be controlled and analyzed.

[0041] More specifically, Figure 1 and Figure 2 As shown, the pipeline 40 includes a transfer tube 41, a variable cross-section pipeline 42 and a cooling air duct 43. One end of the transfer tube 41 is connected to the discharge port 13. One end of the variable cross-section pipeline 42 is connected to the other end of the transfer tube 41, and the inner diameter of the end of the variable cross-section pipeline 42 close to the transfer tube 41 is smaller than the inner diameter of the end away from the transfer tube 41. One end of the cooling air duct 43 is connected to the other end of the variable cross-section pipeline 42, and the other end of the cooling air duct 43 is connected to the sampler 50. In this way, the cooling air duct 43 can be used to cool the high-temperature exhaust to prevent the high-temperature exhaust from damaging other equipment. The transfer tube 41 and the variable cross-section pipeline 42 can facilitate the connection of the cooling air duct 43 with the discharge port 13.

[0042] It will be understood by those skilled in the art that the length of the cooling air duct 43 can be adjusted according to actual needs while preventing high-temperature exhaust from damaging other equipment.

[0043] Advantageously, the transfer tube 41 is welded to the discharge port 13, and the variable cross-section pipe 42 is welded to the transfer tube 41. This can improve the connection strength and sealing between the discharge port 13, the transfer tube 41, and the variable cross-section pipe 42.

[0044] More advantageously, if Figure 1As shown, the particle counter 60 is connected to the cooling air duct 43 through the dilution device 70, and the dilution device 70 is suitable for diluting the emissions after the thermal runaway of the lithium battery. In this way, part of the emissions can enter the particle counter 60 after being diluted, which can further reduce the influence of the setting of the particle counter 60 on the quantitative analysis results of the sampler 50.

[0045] Furthermore, if Figure 1 As shown, the particle counter 60 is connected to the diluting device 70 through a rubber hose 80, and the diluting device 70 is connected to the cooling air duct 43 through the rubber hose 80. This can facilitate the connection of the particle counter 60, the diluting device 70 and the rubber hose 80, and improve the flexibility of the setting position of the diluting device 70 and the particle counter 60.

[0046] Optionally, the test container 10 is made of stainless steel, which can make the test container 10 have good heat resistance and prevent high-temperature emissions from damaging the test container 10.

[0047] Specifically, the transfer tube 41 and the variable cross-section pipe 42 are also made of stainless steel, and the cooling air duct 43 can be made of heat-resistant material to prevent damage by high-temperature emissions.

[0048] Figure 1 and Figure 2 A device 1 for transporting particulate matter after thermal runaway of a lithium battery according to some examples of the present invention is shown. Figure 1 and Figure 2 As shown, the puncture opening 11 is located on the upper surface of the test container 10. This makes it easier for the puncture device 20 to puncture the lithium battery. The puncture opening 11 is circular and suitable for an infrared camera to capture the thermal runaway process of the lithium battery through the puncture opening 11. This makes it easier to record and analyze the thermal runaway process of the lithium battery.

[0049] Specifically, Figure 1 and Figure 2 As shown, a gasket 14 is provided below the test container 10. Specifically, the gasket 14 is also a stainless steel material. The gasket 14 can be installed on other platforms or bases. This can facilitate the positioning of the test container 10.

[0050] Other structures and operations of the device for transporting particulate matter emitted by a lithium battery after thermal runaway 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for transporting particulate matter emitted after thermal runaway of a lithium battery, characterized in that: include: A test container, wherein the test container is suitable for accommodating a lithium battery, and the test container is provided with a puncture port, a cable port, and a discharge port; A puncture device, the puncture device having a puncture member, the puncture member is suitable for passing through the puncture opening to puncture the lithium battery; A cable, the cable passing through the cable port and connected to the lithium battery and suitable for triggering thermal runaway of the lithium battery; a pipeline connected to the discharge port; A sampler, the sampler is connected to the pipeline, and an air pump is provided on the sampler, and the air pump is suitable for pumping air at a predetermined flow rate so that the sampler can collect the emissions after the thermal runaway of the lithium battery; A particle counter is connected to the conduit and is adapted to record the concentration of particulate matter.

2. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: The cable comprises a heating wire and a conducting wire, wherein the heating wire is suitable for being connected to the lithium battery and for triggering thermal runaway of the lithium battery through thermal abuse, and the conducting wire is suitable for being electrically connected to the lithium battery and for triggering thermal runaway of the lithium battery through electrical abuse.

3. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: The pipeline includes: A transfer pipe, one end of which is connected to the discharge port; A variable cross-section pipe, one end of which is connected to the other end of the transfer pipe, and the inner diameter of the end of the variable cross-section pipe close to the transfer pipe is smaller than the inner diameter of the end away from the transfer pipe; A cooling air duct, one end of which is connected to the other end of the variable-section pipeline, and the other end of which is connected to the sampler.

4. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 3, characterized in that: The transfer tube is connected to the discharge port by welding, and the variable-section pipeline is connected to the transfer tube by welding.

5. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 3, characterized in that: The particle counter is connected to the cooling air duct through a dilution device, and the dilution device is suitable for diluting the emissions after thermal runaway of the lithium battery.

6. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 5, characterized in that: The particle counter is connected to the dilution device through a rubber hose, and the dilution device is connected to the cooling air duct through a rubber hose.

7. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: The test container is made of stainless steel.

8. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: The cable is connected with a temperature measuring device, and the temperature measuring device is suitable for detecting the temperature of the lithium battery.

9. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: The puncture opening is located on the upper surface of the test container, and the puncture opening is circular and suitable for an infrared camera to shoot the thermal runaway process of the lithium battery through the puncture opening.

10. The device for transporting particulate matter emitted after thermal runaway of a lithium battery according to claim 1, characterized in that: A gasket is arranged under the test container.

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