Battery thermal runaway particulate matter sedimentation distribution testing device

Abstract

The invention relates to the technical field of batteries, and provides a battery thermal runaway particulate matter sedimentation distribution testing device which comprises a box body assembly, a collecting assembly, a clamping assembly and a heating device, the box body assembly comprises a box body and a box cover, and an inner space is formed between the box body and the box cover; the collecting assembly comprises a collecting plate, the shape of the collecting plate is matched with the shape of the inner space, the collecting plate is movably arranged in the inner space, the collecting plate is divided into a plurality of collecting areas, and the collecting areas are used for collecting particles erupted when the battery is in thermal runaway; the clamping assembly is used for clamping a battery to be tested, and the clamping assembly is placed on the collecting plate; and the heating device is used for heating the battery. According to the scheme, the particulate matters erupted after thermal runaway of the battery can be collected, and the sedimentation distribution information of the particulate matters is obtained, so that the design of subsequent safety protection measures is facilitated, and the thermal safety performance of the battery is improved.

Description

Technical Field

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

[0002] In recent years, the proportion of my country's new energy vehicle production and sales in the world has gradually increased. New energy vehicles are gradually replacing traditional fuel vehicles in the automobile market due to their environmental protection and high transmission efficiency. However, the frequent fire and explosion accidents of new energy vehicles caused by thermal runaway of lithium-ion batteries have attracted widespread attention from the society. When lithium-ion batteries are in thermal runaway, they will emit high-temperature particles and high-temperature airflow. Once the high-temperature particles come into contact with combustible gases, they will cause the battery to catch fire and cause fire accidents, causing irreversible damage to the battery system and the surrounding environment. In addition, the ejected particles are discharged into the soil and the environment, and the toxic and polluting elements in them will accumulate in the human body through the food chain, thereby causing harm to human health and soil.

[0003] At the same time, the different sizes of particles emitted by thermal runaway contain different types and contents of heavy metal elements and toxic elements. The sizes are all in the micron and millimeter levels, which can be suspended and inhaled by the human body or slowly deposited. Using a filter with a certain small diameter to filter out most of the high-temperature particles may prevent the exhaust gas from catching fire and being discharged into the environment. Therefore, the size of the particles and the distribution of the energy they carry are of great significance to the research field of thermal runaway hazards of lithium-ion batteries. Summary of the invention

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

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

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

[0007] A box assembly, the box assembly comprising a box body and a box cover, an inner space being formed between the box body and the box cover;

[0008] A collecting assembly, the collecting assembly comprising a collecting plate, the shape of the collecting plate being adapted to the shape of the inner space, the collecting plate being movably disposed in the inner space, and the collecting plate being divided into a plurality of collecting areas, the plurality of collecting areas being used to collect particles ejected when the battery is in thermal runaway;

[0009] A clamping assembly, the clamping assembly is used to clamp the battery to be tested, and the clamping assembly is placed on the collecting plate;

[0010] A heating device is used to heat the battery.

[0011] In the embodiment scheme of the present application, by setting the box assembly, it is possible to form the inner space to provide a relatively closed space for subsequent battery thermal runaway testing; by setting the collecting assembly, the particulate matter generated during the eruption of battery thermal runaway can be collected, thereby facilitating subsequent further analysis of the particulate matter; by setting the heating device, it can be used to promote the occurrence of thermal runaway of the battery, and by setting the clamping assembly, the state stability of the battery during the test can be improved, so as to improve the accuracy of the test data.

[0012] In some embodiments, a temperature detection system is further included, and the temperature detection system includes:

[0013] a first temperature detection device for detecting the temperature of the particulate matter;

[0014] A second temperature detection device is used to detect the temperature distribution state of the particulate matter.

[0015] In the embodiment of the present application, the first temperature detection device can be used to detect the temperature data of the erupted particles; and the second temperature detection device can be used to detect the temperature distribution state of the particles after the eruption.

[0016] In some embodiments, the first temperature detection device includes a plurality of thermocouples, and the plurality of thermocouples are disposed on the collecting plate.

[0017] In the embodiment of the present application, by setting the first temperature detection device to be in the form of a thermocouple, it can be more convenient to use, facilitate temperature data detection, and reduce application costs.

[0018] In some embodiments, the second temperature detection device includes a temperature sensor, and the temperature sensor is disposed on the box cover.

[0019] In the embodiment of the present application, by arranging the second temperature detection device on the box cover, the second temperature detection device can be conveniently used to detect the conditions of the entire particle settling area, reduce the number of applications of the second temperature detection device, and thus simplify the structural design of the entire device.

[0020] In some embodiments, a plurality of wire passing holes are formed on the side wall of the box body, and sealing plugs are provided on the wire passing holes.

[0021] In the embodiment of the present application, the wire passing hole is provided to facilitate the introduction of external wires into the inner space; and the sealing plug is provided to seal the wire passing hole in an idle state, so that the test can be carried out in a closed space, thereby improving the accuracy of the test.

[0022] In some embodiments, a pressure relief valve is provided on the box assembly.

[0023] In the embodiment of the present application, the pressure relief valve is provided to relieve pressure when the internal pressure of the box assembly is too high, so as to improve the reliability and safety of the device during the test.

[0024] In some embodiments, the collection assembly further comprises a plurality of first blocking members, and the plurality of first blocking members are respectively disposed on the plurality of collection areas;

[0025] The first barrier is used to carry the particles.

[0026] In the embodiment of the present application, the first barrier member is provided to facilitate the carrying of high-temperature particles and prevent the particles from falling directly on the collection plate, which not only improves the protection level of the collection plate, but also facilitates the collection of settled particles.

[0027] In some embodiments, a lifting structure is provided at the edge of the collecting plate.

[0028] In the embodiment of the present application, by providing the lifting structure, it is possible to facilitate adjustment of the position of the collecting component within the box component, thereby making the placement of the collecting component more convenient.

[0029] In some embodiments, the clamping assembly includes a clamping plate and an adjusting member arranged in pairs, and a clamping space for the battery is formed between the two clamping plates;

[0030] The adjusting member is passed through the two clamping plates and is used for adjusting the size of the clamping space.

[0031] In the embodiment of the present application, by setting the clamping plate, a compressive force can be applied to the battery from the large side of the battery, thereby cooperating with the adjustment of the adjusting member to achieve clamping of the battery to be tested, so as to facilitate the smooth implementation of the battery thermal runaway test.

[0032] In some embodiments, a second blocking member is provided on the side of the clamping plate facing the clamping space.

[0033] In the embodiment of the present application, the second barrier member is provided to block the battery and the clamping plate to prevent heat from spreading from the battery to the clamping plate, thereby facilitating heat concentration and reducing energy consumption.

[0034] In some embodiments, the heating device includes a heating plate, and the heating plate is disposed on an inner side of the second barrier member.

[0035] In the embodiment of the present application, the heating plate can be used to heat the battery to be tested, so that the battery can quickly enter a thermal runaway state, and then perform subsequent detection tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is a schematic diagram of the composition of a battery thermal runaway particle deposition distribution test device according to one example of the present application.

[0038] Figure 2 This is a schematic diagram of collecting particulate matter on a collecting plate according to one example of the present application.

[0039] Figure 3 This is a schematic diagram of the partial cross-sectional structure of a collecting plate according to one example of the present application.

[0040] Figure 4 This is a schematic top view of the structure of a clamping assembly according to an example of the present application.

[0041] Marking Description:

[0042] 1-box assembly, 11-box, 111-wire hole, 12-box cover, 13-inner space, 14-sealing ring, 15-pressure relief valve;

[0043] 21 -collecting plate, 211 -collecting area, 212 -grooving, 213 -lifting structure, 22 -first barrier;

[0044] 3-clamping assembly, 31-clamping plate, 32-adjusting member, 33-second blocking member, 34-heating plate;

[0045] 4-Battery;

[0046] 51-first temperature detection device, 52-second temperature detection device;

[0047] 6- Glass bottle. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0049] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] At present, with the increasing market demand for new energy vehicles, the safety performance of new energy vehicles in use has gradually received widespread attention from the society. Accidents such as fire and explosion caused by thermal runaway of lithium-ion batteries are also one of the concerns of people. Among them, lithium-ion batteries will emit high-temperature particles during thermal runaway. In addition to causing secondary fire accidents of batteries after eruption, the harmful elements they contain are also likely to cause harm to the human body and the natural environment. Therefore, the study of particles ejected after thermal runaway of batteries is of great significance, but the existing technology still lacks corresponding analysis and research methods.

[0051] In response to the above technical problems, the purpose of the present embodiment is to provide a battery thermal runaway particle sedimentation distribution test device, which can collect the particles ejected by the battery after thermal runaway occurs and obtain the particle sedimentation distribution information to facilitate the subsequent design of safety protection measures based on the particles and improve the thermal safety performance of the battery.

[0052] like Figures 1 to 4 As shown, this embodiment provides a battery thermal runaway particle deposition distribution test device, including:

[0053] A box assembly 1, the box assembly 1 comprising a box body 11 and a box cover 12, an inner space 13 is formed between the box body 11 and the box cover 12;

[0054] A collecting assembly, the collecting assembly comprising a collecting plate 21, the shape of the collecting plate 21 is adapted to the shape of the inner space 13, the collecting plate 21 is movably arranged in the inner space 13, and a plurality of collecting areas 211 are divided on the collecting plate 21, the plurality of collecting areas 211 are used to collect particulate matter ejected when the battery is in thermal runaway;

[0055] A clamping assembly 3, the clamping assembly 3 is used to clamp the battery 4 to be tested, and the clamping assembly 3 is placed on the collecting plate 21;

[0056] A heating device is used to heat the battery 4 .

[0057] In some embodiments, Figure 1 As shown, the box body 11 and the box cover 12 are detachably connected by fasteners such as bolts, and a sealing ring 14 is provided between the box body 11 and the box cover 12, so that after the box cover 12 is installed on the box body 11, the inner space 13 formed between the two can be relatively sealed, thereby better simulating the environmental state of the battery 4 in conventional applications.

[0058] In some embodiments, Figure 2 As shown, the collection area 211 is partially located in the central area of ​​the collection plate 21, and partially located in the edge area of ​​the collection plate 21. For example, the collection area 211 located in the central area is set to be square, and the collection area 211 located in the edge area is set to be rectangular, so as to better adapt to the eruption characteristics of the battery during thermal runaway, and the partitioned collection method can facilitate the two-dimensional analysis of the spatial distribution of particles erupted during battery thermal runaway.

[0059] In some embodiments, it can be understood that when conducting tests, the ejection port of the battery 4 is set to face upward, for example, in the same direction as the setting of the explosion-proof valve of the battery 4 in actual applications, so that when the battery 4 is in thermal runaway, the ejecta will be ejected upward and then scattered around, thereby facilitating the analysis of the scattered distribution of the ejecta.

[0060] By setting the box assembly 1, it is convenient to form the inner space 13 to provide a relatively closed space for subsequent battery thermal runaway testing; by setting the collecting assembly, the particulate matter generated during the thermal runaway eruption of the battery can be collected, so as to facilitate the subsequent further analysis of the particulate matter; by setting the heating device, it can be used to promote the occurrence of thermal runaway of the battery 4, and by setting the clamping assembly 3, the state stability of the battery 4 during the test process can be improved, so as to improve the accuracy of the test data.

[0061] As one application example, the battery thermal runaway particle deposition distribution test device also includes a temperature detection system, and the temperature detection system includes:

[0062] A first temperature detection device 51 for detecting the temperature of the particulate matter;

[0063] The second temperature detection device 52 is used to detect the temperature distribution state of the particulate matter.

[0064] The first temperature detection device 51 can be used to detect the temperature data of the erupted particles; and the second temperature detection device 52 can be used to detect the temperature distribution state of the particles after the eruption.

[0065] As an example of one application, Figure 2 As shown, the first temperature detection device 51 includes a plurality of thermocouples, and the plurality of thermocouples are arranged on the collecting plate 21 .

[0066] In some embodiments, the plurality of thermocouples are arranged in pairs and are symmetrically distributed on the collecting plate 21 .

[0067] In some embodiments, the thermocouple is configured as a K-type thermocouple and is installed and fixed by means of a high temperature resistant tape, so that the overall application can be more flexible and the application cost can be better controlled.

[0068] In some embodiments, a plurality of groups of thermocouples are arranged at intervals along the length direction of the collecting plate 21, and the arrangement shape of the thermocouples is trapezoidal, so that the temperature of the particles in each collecting area 211 can be better detected. Figure 2 shown.

[0069] By configuring the first temperature detection device 51 to be in the form of a thermocouple, it can be more convenient to use, facilitate temperature data detection, and reduce application costs.

[0070] As an application example, the second temperature detection device 52 includes a temperature sensor, and the temperature sensor is disposed on the box cover 12 .

[0071] In some embodiments, the temperature sensor is configured as an infrared temperature sensor.

[0072] In some embodiments, the number of the temperature sensors may be set to one or more.

[0073] In some embodiments, the temperature sensor is provided as one and is installed in the central area of ​​the box cover 12 .

[0074] By arranging the second temperature detection device 52 on the box cover 12, the second temperature detection device 52 can detect the conditions of the entire particle settling area, thereby reducing the number of applications of the second temperature detection device 52 and simplifying the structural design of the entire device.

[0075] As an application example, a plurality of wire passing holes 111 are opened on the side wall of the box body 11 , and sealing plugs are provided on the wire passing holes 111 .

[0076] In some embodiments, the number of the wire-passing holes 111 may be one or more.

[0077] In some embodiments, the wire hole 111 is used for installing wires of the heating device and the first temperature detection device 51. When these external wires pass through the wire hole 111, they should be sealed with the box body 11.

[0078] In some embodiments, the unused wire holes 111 may be sealed with the sealing plugs.

[0079] By setting the wire hole 111, it is convenient to introduce external wires into the inner space 13; and by setting the sealing plug, the wire hole 111 in an idle state can be blocked, so that the test can be carried out in a closed space, which is convenient for improving the accuracy of the test.

[0080] As an application example, a pressure relief valve 15 is provided on the box assembly 1 .

[0081] In some embodiments, the pressure relief valve 15 is installed on the box body 11 .

[0082] By providing the pressure relief valve 15 , pressure relief can be performed when the internal pressure of the box assembly 1 is too high, so as to improve the reliability and safety of the device during the test.

[0083] As one application example, the collection assembly further includes a plurality of first blocking members 22, and the plurality of first blocking members 22 are respectively arranged on the plurality of collection areas 211;

[0084] The first barrier 22 is used to carry the particles.

[0085] In some embodiments, the thermocouple is fixed to the first barrier 22 by a high temperature resistant tape, and the first barrier 22 is fixed to the collecting plate 21 by a high temperature resistant tape. In this case, direct heat transfer between the thermocouple and the collecting plate 21 can be avoided, and the temperature signal of the particulate matter can be measured more directly.

[0086] In some embodiments, the first barrier 22 is configured as a mica sheet, or is made of other high temperature resistant materials.

[0087] In some embodiments, a plurality of grooves 212 are provided on the collection plate 21 to form a plurality of collection areas 211 through the grooves, and the shape of the first barrier 22 is adapted to the shape of the corresponding collection area 211 so as to carry the particles in the corresponding collection area 211.

[0088] In some embodiments, when the particles falling on the first barrier member 22 are collected, the particles can be stored in a corresponding container device, such as a glass bottle 6, etc., so as to facilitate further analysis of the target parameters of the particles and to construct a spatial distribution model of various characteristics of the settled particles in the closed box.

[0089] By setting the first barrier 22, high-temperature particles can be carried to prevent them from falling directly on the collecting plate 21, which not only improves the protection level of the collecting plate 21, but also makes it easy to collect the settled particles.

[0090] As an application example, a lifting structure 213 is provided at the edge of the collecting plate 21 .

[0091] In some embodiments, the lifting structures 213 are symmetrically arranged on the collecting plate 21 , so that the collecting plate 21 can be easily lifted or lowered by the lifting structures 213 .

[0092] In some embodiments, the lifting structure 213 is configured as a sheet-like component, such as a metal sheet; when the collecting plate 21 is placed in the inner space 13, the sheet-like component can better adhere to the inner wall of the box body 11, thereby reducing the impact of the setting of the lifting structure 213 on the particle settling distribution.

[0093] By providing the lifting structure 213, it is possible to facilitate adjustment of the position of the collecting assembly in the box assembly 1, so that the placement of the collecting assembly can be more convenient.

[0094] As one application example, the clamping assembly includes a clamping plate 31 and an adjusting member 32 arranged in pairs, and a clamping space for the battery 4 is formed between the two clamping plates 31;

[0095] The adjusting member 32 is disposed through the two clamping plates 31 to adjust the size of the clamping space.

[0096] In some embodiments, one or more batteries 4 may be clamped in the clamping space for testing.

[0097] In some embodiments, the adjusting member 32 is configured as a screw rod, so that the clamping plate 31 can be fixed on the screw rod by configuring a nut, or the position of the corresponding nut can be adjusted to adjust the relative position of the clamping plate 31 .

[0098] By setting the clamping plate 31, a pressing force can be applied to the battery 4 from the large side surface of the battery 4, so as to cooperate with the adjustment of the adjusting member 32 to achieve the clamping of the battery 4 to be tested, so as to facilitate the smooth implementation of the battery thermal runaway test.

[0099] As an application example, a second blocking member 33 is provided on the side of the clamping plate 31 facing the clamping space.

[0100] In some embodiments, the second barrier 33 is configured as a mica sheet, or is made of other high temperature resistant materials.

[0101] The second barrier 33 can be provided to isolate the battery 4 from the clamping plate 31 to prevent heat from spreading from the battery 4 to the clamping plate 31 , thereby facilitating heat concentration and reducing energy consumption.

[0102] As an application example, the heating device includes a heating plate 34 , and the heating plate 34 is disposed on the inner side of the second blocking member 33 .

[0103] In some embodiments, the heating plate 34 can be provided as one piece to be installed on one side surface of the battery 4 .

[0104] In some embodiments, the heating plates 34 are disposed on both large sides of the battery 4 .

[0105] The heating plate 34 can be used to heat the battery 4 to be tested, so that the battery 4 can quickly enter the thermal runaway state, and then carry out subsequent detection tests. The part of the ejected particles that settle on the top end surface of the clamping plate 31 and the heating plate 34 will be counted into the mass of the battery debris.

[0106] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0107] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A battery thermal runaway particle sedimentation distribution test device, characterized in that: include: A box assembly, the box assembly comprising a box body and a box cover, an inner space being formed between the box body and the box cover; A collecting assembly, the collecting assembly comprising a collecting plate, the shape of the collecting plate being adapted to the shape of the inner space, the collecting plate being movably disposed in the inner space, and the collecting plate being divided into a plurality of collecting areas, the plurality of collecting areas being used to collect particles ejected when the battery is in thermal runaway; A clamping assembly, the clamping assembly is used to clamp the battery to be tested, and the clamping assembly is placed on the collecting plate; A heating device is used to heat the battery.

2. The battery thermal runaway particle sedimentation distribution testing device according to claim 1, characterized in that: Also included is a temperature detection system, the temperature detection system comprising: a first temperature detection device for detecting the temperature of the particulate matter; A second temperature detection device is used to detect the temperature distribution state of the particulate matter.

3. The battery thermal runaway particle sedimentation distribution testing device according to claim 2, characterized in that: The first temperature detection device includes a plurality of thermocouples, and the plurality of thermocouples are arranged on the collecting plate.

4. The battery thermal runaway particle sedimentation distribution testing device according to claim 3, characterized in that: The second temperature detection device includes a temperature sensor, and the temperature sensor is arranged on the box cover.

5. The battery thermal runaway particle sedimentation distribution testing device according to any one of claims 1 to 4, characterized in that: A plurality of wire passing holes are provided on the side wall of the box body, and sealing plugs are provided on the wire passing holes.

6. The battery thermal runaway particle sedimentation distribution testing device according to claim 5, characterized in that: The box assembly is provided with a pressure relief valve.

7. The battery thermal runaway particle sedimentation distribution testing device according to claim 1 or 6, characterized in that: The collecting assembly further comprises a plurality of first blocking members, wherein the plurality of first blocking members are respectively arranged on the plurality of collecting areas; The first barrier is used to carry the particles.

8. The battery thermal runaway particle sedimentation distribution testing device according to claim 7, characterized in that: A lifting structure is arranged at the edge of the collecting plate.

9. The battery thermal runaway particle sedimentation distribution testing device according to claim 1 or 8, characterized in that: The clamping assembly includes a clamping plate and an adjusting member arranged in pairs, and a clamping space for the battery is formed between the two clamping plates; The adjusting member is passed through the two clamping plates and is used for adjusting the size of the clamping space.

10. The battery thermal runaway particle deposition distribution test device according to claim 9, characterized in that: A second blocking member is arranged on the side of the clamping plate facing the clamping space.

11. The battery thermal runaway particle deposition distribution test device according to claim 10, characterized in that: The heating device comprises a heating plate, and the heating plate is arranged on the inner side of the second blocking member.

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