Battery thermal runaway testing device

Abstract

The invention relates to the technical field of battery testing, and discloses a battery thermal runaway testing device, which comprises a shell and a position adjusting assembly, and is characterized in that a supporting platform, a first clamping plate, a second clamping plate and a fire extinguishing assembly are arranged in the shell; the supporting platform is arranged between the first clamping plate and the second clamping plate and is used for placing a to-be-tested battery; the first clamping plate and the second clamping plate are arranged in parallel; a first accommodating groove for arranging a heating unit is formed in one side, close to the supporting platform, of the first clamping plate; a second accommodating groove for arranging a battery state detection unit is formed in one side, close to the supporting platform, of the second clamping plate; the fire extinguishing assembly is configured to perform cooling operation on the to-be-detected battery when the battery state detection unit detects thermal runaway of the to-be-detected battery; the position adjusting assembly is configured to drive the first clamping plate and the second clamping plate to move in the direction close to the to-be-tested battery. The problem of battery thermal runaway test risk caused by continuous rising of the battery temperature can be solved, and the safety of battery thermal runaway test is improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery testing technology, specifically to a battery thermal runaway testing device. Background Technology

[0002] Battery thermal runaway refers to a rapid rise in temperature caused by a chain reaction of exothermic reactions within the battery, which may lead to fire or explosion. Therefore, thermal runaway testing is needed to guide the selection of battery materials, structural design, and the development of thermal management systems.

[0003] Current thermal runaway testing technologies mostly involve applying a heat source to the outside of the battery, causing the battery temperature to rise continuously until it triggers a chain reaction of exothermic reactions inside, ultimately leading to thermal runaway. During the initial thermal runaway phase, a domino effect may occur, posing testing risks. Summary of the Invention

[0004] In view of this, the present disclosure provides a battery thermal runaway testing device to address the risk of battery thermal runaway caused by continuous rise in battery temperature.

[0005] In a first aspect, this disclosure provides a battery thermal runaway testing device, comprising: a housing and a position adjustment assembly, wherein the housing is provided with a support platform, a first clamping plate, a second clamping plate and a fire extinguishing assembly;

[0006] The support platform is located between the first clamping plate and the second clamping plate, and the support platform is used to place the battery to be tested.

[0007] The first clamping plate and the second clamping plate are arranged in parallel, and the first clamping plate is provided with a first receiving groove for accommodating the heating unit on the side near the support platform;

[0008] The second clamping plate has a second receiving slot for setting up the battery status detection unit on the side near the support platform;

[0009] The fire extinguishing component is configured to perform a cooling operation on the battery under test when thermal runaway of the battery under test is detected by the battery status detection unit.

[0010] The position adjustment component is configured to drive the first clamp and the second clamp to move in a direction close to the battery under test.

[0011] In one alternative embodiment, the position adjustment assembly includes an operating part and a screw;

[0012] The operating part is fixed to one end of the screw and is located outside the housing;

[0013] The screw is arranged in a direction perpendicular to the first clamping plate and the second clamping plate, and the end of the screw away from the operating part passes through the side wall of the housing, the threaded hole of the first clamping plate and the threaded hole of the second clamping plate in sequence.

[0014] In one optional implementation, the battery state detection unit includes a pressure detection unit;

[0015] The operating unit is provided with a display unit, which is connected to the pressure detection unit and is configured to display the pressure data detected by the pressure detection unit.

[0016] In one optional embodiment, the screw is provided with a first mating section and a second mating section along the axial direction. The first mating section mates with the threaded hole of the first clamping plate, and the second mating section mates with the threaded hole of the second clamping plate. The thread directions of the first mating section and the second mating section are different.

[0017] In one optional embodiment, the first clamping plate is further provided with a connector and a mounting hole penetrating the first receiving groove; the heating unit is provided with a connection hole adapted to the mounting hole;

[0018] The connector passes through the mounting hole and the connection hole of the heating unit to install the heating unit in the first receiving groove.

[0019] In one optional embodiment, the heating unit is disposed corresponding to the battery under test, and the heating unit has an arc-shaped structure facing the tail of the battery under test.

[0020] In one optional embodiment, the fire extinguishing assembly includes a fire extinguishing agent storage unit, a fire extinguishing agent injection unit, and an electromagnetic control device;

[0021] A heat insulation plate is provided between the fire extinguishing agent storage section and the second clamping plate;

[0022] The extinguishing agent spraying unit is installed on the side wall of the housing, the nozzle of the extinguishing agent spraying unit faces the support platform, and the extinguishing agent spraying unit is connected to the extinguishing agent storage unit through a pipeline;

[0023] The electromagnetic control device is configured to control the connection and disconnection between the fire extinguishing agent storage section and the pipeline based on the battery state of the battery under test.

[0024] In one alternative embodiment, a guide rail is mounted on the bottom plate of the housing;

[0025] The bottom of the first clamping plate is provided with a first slider, and the first clamping plate is assembled onto the base plate by cooperating with the guide rail through the first slider;

[0026] The bottom of the second clamping plate is provided with a second slider, and the second clamping plate is assembled onto the base plate by cooperating with the guide rail through the second slider.

[0027] In one optional implementation, a first limiting module and a second limiting module are provided on both sides of the guide rail;

[0028] The first limiting module is used to limit the movement position of the first clamping plate;

[0029] The second limiting module is used to limit the movement position of the second clamping plate.

[0030] In one optional embodiment, the battery thermal runaway testing device further includes a power module and heating leads corresponding to each of the heating units;

[0031] The power module is located outside the housing;

[0032] One end of the heating lead is connected to the output end of the power module, and the other end passes through the lead hole of the housing and the wire groove on the first clamping plate in sequence to form an electrical connection with the corresponding heating unit; the wire groove and the receiving groove are arranged one-to-one, one end of the wire groove is connected to the interior of the corresponding receiving groove, and the other end passes through the side wall of the first clamping plate.

[0033] This disclosed battery thermal runaway testing device comprises a housing, within which a support platform, a first clamping plate, and a second clamping plate are arranged. The support platform is used to hold the battery under test. The first clamping plate has a first receiving slot for accommodating a heating unit on its side near the support platform, and the second clamping plate has a second receiving slot for accommodating a battery status detection unit on its side near the support platform. A position adjustment component is also provided, which drives the first and second clamping plates to move closer to the battery under test. Therefore, battery thermal runaway testing can be performed within the housing, minimizing the impact of the thermal runaway test on the outside of the housing. Simultaneously, a fire extinguishing component is also provided within the housing, configured to perform a cooling operation on the battery under test when thermal runaway is detected by the battery status detection unit. Therefore, after the battery thermal runaway test results are obtained, the fire extinguishing component can promptly perform cooling and fire extinguishing operations on the battery, preventing the triggering of a chain reaction of exothermic reactions, effectively reducing the risk of battery thermal runaway testing, and improving the safety of battery thermal runaway testing. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a battery thermal runaway testing device according to an embodiment of the present disclosure;

[0036] Figure 2 This is a top view of a battery thermal runaway testing device according to an embodiment of the present disclosure;

[0037] Figure 3 This is a schematic diagram of the structure of a first clamping plate according to an embodiment of the present disclosure;

[0038] Figure 4 This is a schematic diagram of the structure of a heating unit according to an embodiment of the present disclosure.

[0039] The attached figures are labeled as follows: 1. Housing; 2. Support platform; 3. First clamping plate; 31. First receiving groove; 32. Mounting hole; 4. Second clamping plate; 41. Second receiving groove; 5. Heating unit; 51. Connecting hole; 52. Heating resistance wire; 6. Operating part; 7. Screw; 8. Extinguishing agent storage part; 9. Extinguishing agent spraying part; 10. Electromagnetic control device; 11. Heat insulation plate; 12. Guide rail; 13. First limiting module; 14. Second limiting module; 15. Power module; 16. Heating lead wire. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0041] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0042] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0043] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.

[0044] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] Battery thermal runaway refers to a rapid rise in temperature caused by a chain reaction of exothermic reactions within the battery, potentially leading to fire or explosion. Statistics show that thermal runaway is one of the leading causes of fires in new energy vehicles. Therefore, the industry faces the serious threat of personal injury and property damage from battery thermal runaway, making "no fire, no explosion" a mandatory requirement for batteries. Thermal runaway testing is used to guide material selection (such as separator temperature resistance), structural design (such as heat diffusion barriers), and the development of thermal management systems.

[0047] Current thermal runaway testing technologies mostly involve applying heat sources such as heating plates or heating rods to the outside of the battery, causing the battery temperature to rise continuously until it triggers a chain of exothermic internal reactions, such as separator melting or cathode decomposition, ultimately leading to thermal runaway. Since heat transfer is primarily through conduction, it is essential to ensure close contact between the heat source and the battery surface.

[0048] However, current thermal runaway testing techniques still have the following problems:

[0049] 1. Insufficient protection in extreme scenarios: During the thermal runaway outbreak, the battery temperature is usually greater than 200°C, which may trigger a "domino effect". However, most test equipment lacks protective design, resulting in high test risks.

[0050] 2. Inconsistent testing standards: Different companies use different methods (such as whether or not to use a clamp), resulting in poor comparability of results.

[0051] 3. External heating devices occupy space and require external force to make close contact with the battery. Their heat capacity and thermal conductivity characteristics interfere with the battery's own temperature response.

[0052] In view of this, according to an embodiment of the present disclosure, a battery thermal runaway testing device is provided. Figure 1 This is a schematic diagram of a battery thermal runaway testing device according to an embodiment of the present disclosure, as shown below. Figure 1 As shown, the battery thermal runaway test device disclosed herein includes a housing 1, wherein the housing 1 is made of steel shell, and the housing 1 is provided with a support platform 2, a first clamping plate 3, a second clamping plate 4 and a fire extinguishing component.

[0053] The support platform 2 is located between the first clamping plate 3 and the second clamping plate 4, and the support platform 2 is used to place the battery to be tested.

[0054] The first clamping plate 3 and the second clamping plate 4 are arranged parallel to each other. The first clamping plate 3 has a first receiving slot 31 for housing the heating unit 5 on the side closest to the support platform 2. The first clamping plate 3 serves as a heating clamping plate, configured to heat the battery under test to induce thermal runaway. The number of first receiving slots 31 can be one or more, as long as the number of first receiving slots 31 is sufficient to accommodate the number of heating units 5. The multiple first receiving slots 31 are evenly distributed. The number of heating units 5 can be adjusted according to the heating requirements of the battery under test and is not limited here. This allows for adjustable and controllable number of heating units 5, stabilizes the heating power during battery thermal runaway testing, improves the testing accuracy of battery thermal runaway testing, and reduces errors caused by human operation.

[0055] The second clamping plate 4 has a second receiving slot 41 for housing the battery status detection unit on the side near the support platform 2. The structure of the second clamping plate 4 is similar to that of the first clamping plate 3, except that the second receiving slot 41 of the second clamping plate 4 is used to house the battery status detection unit. Optionally, the battery status detection unit includes a temperature detection unit, such as a thermocouple or a temperature sensor, which is used to detect the temperature data of the battery under test. The battery status detection unit also includes a pressure detection unit, such as a pressure sensor, which can be a piezoelectric pressure sensor or a ceramic pressure sensor, and is used to detect the pressure data of the battery under test. In addition, the battery status detection unit may also include a displacement sensor, etc. The type and number of battery status detection units can be adjusted according to the status detection requirements of the battery under test, and are not limited here. The number of second receiving slots 41 can be one or more, as long as the number of second receiving slots 41 is sufficient to meet the number of battery status detection units.

[0056] The fire suppression component is configured to perform a cooling operation on the battery under test when thermal runaway is detected by the battery status detection unit.

[0057] The battery thermal runaway testing device also includes a position adjustment component, wherein the position adjustment component is configured to drive the first clamping plate 3 and the second clamping plate 4 to move in a direction close to the battery under test.

[0058] Specifically, the battery thermal runaway testing device also includes a control module, which is connected to both the battery status detection unit and the fire extinguishing assembly to collect detection data from the battery status detection unit and determine the battery status of the battery under test based on the detection data. The control module is configured to activate the fire extinguishing assembly when the battery status indicates thermal runaway of the battery under test, so that the fire extinguishing assembly performs a cooling operation on the battery under test.

[0059] Furthermore, the control module includes a data acquisition unit and a control unit. The data acquisition unit is connected to the battery status detection unit and is used to acquire the detection data from the battery status detection unit. The control unit determines the battery status of the battery under test based on the detection data acquired by the data acquisition unit, and when the battery status indicates thermal runaway of the battery under test, it controls the fire extinguishing assembly to activate so that the fire extinguishing assembly performs a cooling operation on the battery under test.

[0060] The battery thermal runaway testing device provided in this embodiment includes a housing 1, within which a support platform 2, a first clamping plate 3, and a second clamping plate 4 are arranged. The support platform 2 is used to place the battery under test. The first clamping plate 3 has a first receiving groove 31 for placing a heating unit 5 on the side near the support platform 2, and the second clamping plate 4 has a second receiving groove 41 for placing a battery status detection unit on the side near the support platform 2. A position adjustment component is also provided, which drives the first clamping plate 3 and the second clamping plate 4 to move closer to the battery under test. Therefore, battery thermal runaway testing can be performed within the housing 1, minimizing the impact of the battery thermal runaway test on the outside of the housing 1. Simultaneously, a fire extinguishing component is also provided within the housing 1. The fire extinguishing component is configured to perform a cooling operation on the battery under test when thermal runaway is detected by the battery status detection unit. Therefore, after the battery thermal runaway test results are obtained, the fire extinguishing component can promptly perform cooling and fire extinguishing operations on the battery, avoiding triggering a chain reaction of exothermic reactions, effectively reducing the risk of battery thermal runaway testing, and improving the safety and fire extinguishing efficiency of battery thermal runaway testing.

[0061] In some alternative implementations, see [link to implementation details]. Figure 2 The position adjustment assembly includes an operating part 6 and a screw 7; wherein, the operating part 6 is fixed to one end of the screw 7 and is located outside the housing 1; the screw 7 is arranged in a direction perpendicular to the first clamping plate 3 and the second clamping plate 4, and the end of the screw 7 away from the operating part 6 passes through the side wall of the housing 1, the threaded hole of the first clamping plate 3 and the threaded hole of the second clamping plate 4 in sequence.

[0062] Optionally, the operating part 6 is a handle, specifically a circular handle. The operating part 6 is connected to one end of the screw 7 and is installed outside the housing 1. The user can adjust the position of the first clamping plate 3 and the second clamping plate 4 by rotating the operating part 6.

[0063] Specifically, the end of the screw 7 away from the operating part 6 passes through the side wall of the housing 1 and is connected to the first clamping plate 3 and the second clamping plate 4 through the threaded holes of the first clamping plate 3 and the second clamping plate 4, respectively. The position of the first clamping plate 3 and the second clamping plate 4 is adjusted by the cooperation of the screw 7 with the threaded holes of the first clamping plate 3 and the second clamping plate 4.

[0064] It should be noted that the end of the screw 7 away from the operating part 6 passes through the side wall of the housing 1, the threaded hole of the first clamping plate 3 and the threaded hole of the second clamping plate 4 in sequence, and then contacts the heat insulation plate 11. The heat insulation plate 11 is located between the fire extinguishing agent storage part 8 and the second clamping plate 4 in the fire extinguishing assembly.

[0065] In practical applications, such as Figure 2As shown, when the operating part 6 rotates to one side, it drives the screw 7 to rotate to one side, thereby causing the first clamping plate 3 and the second clamping plate 4 to move in a direction closer to the battery under test. When the operating part 6 rotates to the other side, it drives the screw 7 to rotate to the other side, thereby causing the first clamping plate 3 and the second clamping plate 4 to move in a direction away from the battery under test.

[0066] In some optional embodiments, the battery state detection unit includes a pressure detection unit configured to detect pressure data of the battery under test. The operation unit 6 is provided with a display unit connected to the pressure detection unit, configured to display the pressure data detected by the pressure detection unit.

[0067] Optionally, the pressure detection unit is a pressure sensor.

[0068] Optionally, the display unit can be an instrument or a display screen, and there is no limitation on it.

[0069] Specifically, the output end of the pressure detection unit is connected to one end of a wire, and the other end of the wire passes through the wire groove provided inside the screw 7 and is connected to the display unit on the operation unit 6 to form an electrical connection between the pressure detection unit and the display unit.

[0070] In practical applications, the display unit is mounted on the surface of the operating part 6. When the first clamping plate 3 and the second clamping plate 4 press the battery under test, the pressure detection unit on the second clamping plate 4 detects the pressure data of the battery under test and transmits the electrical signal carrying the pressure data to the display unit through a wire. After receiving the electrical signal output by the pressure detection unit, the display unit displays the pressure data carried in the electrical signal, thereby realizing the adjustable, controllable, and visual pressure of the clamping plate of the battery under test during battery thermal runaway testing, reducing errors caused by human operation, and improving the accuracy of battery thermal runaway testing.

[0071] For example, the user operates the operating unit 6 to rotate the screw 7, thereby driving the first clamping plate 3 and the second clamping plate 4 to move in a direction closer to the battery under test. At this time, the pressure detection unit continuously monitors the pressure data of the battery under test and transmits it to the display unit for display. If the pressure data displayed on the display unit is greater than a preset pressure threshold, it indicates that the battery under test is currently under excessive pressure. In this case, the user can operate the operating unit 6 to rotate the screw 7 in the opposite direction, thereby driving the first clamping plate 3 and the second clamping plate 4 to move in a direction away from the battery under test, so that the battery under test remains within its pressure tolerance range.

[0072] In some alternative embodiments, the screw 7 is provided with a first mating section and a second mating section along the axial direction. The first mating section mates with the threaded hole of the first clamping plate 3, and the second mating section mates with the threaded hole of the second clamping plate 4. The thread directions of the first mating section and the second mating section are different.

[0073] Therefore, when the screw 7 rotates in the same direction, the first clamping plate 3 and the second clamping plate 4 can rotate in opposite directions, so that the first clamping plate 3 and the second clamping plate 4 both move in the direction closer to the battery under test, or both move in the direction away from the battery under test.

[0074] In some alternative implementations, see [link to implementation details]. Figure 3 The first clamping plate 3 is also provided with a connector and a mounting hole 32 penetrating the first receiving groove 31. See also Figure 4 The heating unit 5 is provided with a connection hole 51 that is adapted to the mounting hole 32. The connector passes through the mounting hole 32 and the connection hole 51 of the heating unit 5 to install the heating unit 5 in the first receiving groove 31.

[0075] Optionally, the connector is an iron rod. In addition, other high-temperature resistant connectors may be used, which are not limited here.

[0076] Optionally, the connection hole 51 of the heating unit 5 is located at the tail of the heating unit 5.

[0077] Optionally, both mounting hole 32 and connecting hole 51 are round holes, which can be adjusted according to the shape of the connector.

[0078] Specifically, the first clamping plate 3 has a first hole and a second hole at the opposite positions on both sides. One end of the connector contacts the first hole, and the other end of the connector passes through the mounting hole 32 of each first receiving groove 31 and the corresponding connecting hole 51 of the heating unit 5 in sequence, and contacts the second hole. Thus, the first clamping plate 3 and the heating unit 5 are connected together by the connector so that the heating unit 5 is installed in the corresponding first receiving groove 31.

[0079] In some alternative implementations, see [link to implementation details]. Figure 4 The heating unit 5 is set up in correspondence with the battery under test, and the heating unit 5 is in an arc shape facing the tail of the battery under test.

[0080] The heating unit 5 is equipped with a heating resistance wire 52.

[0081] Specifically, when there are multiple batteries to be tested, each battery to be tested has a corresponding heating unit 5, and the tail of the heating unit 5 faces the corresponding battery to be tested and has an arc-shaped structure.

[0082] Understandably, the battery under test may undergo deformations such as expansion and contraction during charge-discharge cycles. When the battery under test deforms, it bulges in the middle and concaves on both sides. The arc-shaped structure at the tail of the heating unit 5 has a certain elastic deformation capability, which can adapt to the deformation of the battery under test, maintain good contact with the battery under test, and avoid distortion of heating power.

[0083] In some optional embodiments, the fire extinguishing assembly includes a fire extinguishing agent storage section 8, a fire extinguishing agent injection section 9, and an electromagnetic control device 10; wherein, a heat insulation plate 11 is provided between the fire extinguishing agent storage section 8 and the second clamping plate 4; the fire extinguishing agent injection section 9 is installed on the side wall of the housing 1, the nozzle of the fire extinguishing agent injection section 9 faces the support platform 2, and the fire extinguishing agent injection section 9 and the fire extinguishing agent storage section 8 are connected by a pipeline; the electromagnetic control device 10 is configured to control the on / off connection between the fire extinguishing agent storage section 8 and the pipeline according to the battery state of the battery under test.

[0084] The electromagnetic control device 10 is an electromagnet, and is configured to connect the fire extinguishing agent storage section 8 to the pipeline when the battery under test experiences thermal runaway, and to disconnect the fire extinguishing agent storage section 8 from the pipeline when the battery under test does not experience thermal runaway.

[0085] Optionally, the extinguishing agent storage section 8 is a fire extinguisher, specifically a carbon dioxide fire extinguisher, and the electromagnetic control device 10 is specifically configured to control the spraying of the extinguishing agent storage section 8.

[0086] Optionally, the extinguishing agent injection section 9 is a fire sprinkler head.

[0087] Optionally, there may be multiple extinguishing agent storage units 8 and extinguishing agent spraying units 9, with the extinguishing agent storage units 8 and extinguishing agent spraying units 9 being arranged in a corresponding manner. For example, two extinguishing agent storage units 8 and two extinguishing agent spraying units 9 may be arranged, with each extinguishing agent storage unit 8 and extinguishing agent spraying unit 9 corresponding to the other.

[0088] Specifically, when the battery under test is detected to have thermal runaway by the battery status detection unit, the electromagnetic control device 10 activates the extinguishing agent storage section 8 to connect the extinguishing agent storage section 8 with the pipeline. The extinguishing agent (such as carbon dioxide) in the extinguishing agent storage section 8 is transmitted to the extinguishing agent spraying section 9 through the pipeline, thereby causing the extinguishing agent spraying section 9 to spray the extinguishing agent onto the battery under test in order to control the degree of thermal runaway of the battery under test and to achieve rapid cooling and extinguishing of the battery under test.

[0089] In some alternative implementations, see [link to implementation details]. Figure 1 A guide rail 12 is installed on the bottom plate of the housing 1; a first slider is provided at the bottom of the first clamping plate 3, and the first clamping plate 3 is assembled on the bottom plate in cooperation with the guide rail 12 through the first slider; a second slider is provided at the bottom of the second clamping plate 4, and the second clamping plate 4 is assembled on the bottom plate in cooperation with the guide rail 12 through the second slider.

[0090] Specifically, the guide rail 12 is mounted on the base plate of the housing 1 by means of bolts or the like. The guide rail 12 is equipped with springs or hydraulic pressure to control the first clamping plate 3 and the second clamping plate 4.

[0091] Optionally, the bottom of the support platform 2 is provided with a third slider. The support platform 2 is assembled on the base plate in cooperation with the guide rail 12 through the third slider, so as to drive the battery under test to move.

[0092] In some alternative implementations, see [link to implementation details]. Figure 1 and Figure 2 The guide rail 12 is provided with a first limiting module 13 and a second limiting module 14 on both sides; wherein, the first limiting module 13 is used to limit the movement position of the first clamping plate 3; and the second limiting module 14 is used to limit the movement position of the second clamping plate 4.

[0093] In some alternative implementations, see [link to implementation details]. Figure 2 The battery thermal runaway testing device also includes a power module and heating leads 16 corresponding to the heating units 5. The power module is located outside the housing 1; one end of the heating lead 16 is connected to the output end of the power module, and the other end passes through the lead hole of the housing 1 and the wire groove on the first clamping plate 3 in sequence, and then forms an electrical connection with the corresponding heating unit 5; the wire groove is arranged in a one-to-one correspondence with the receiving groove, one end of the wire groove is connected to the inside of the corresponding receiving groove, and the other end passes through the side wall of the first clamping plate 3.

[0094] The power supply module is a DC power supply used to power the heating unit 5.

[0095] Specifically, the number of heating leads 16 is the same as the number of heating units 5.

[0096] In summary, the battery thermal runaway testing device disclosed herein has the following beneficial effects:

[0097] 1. Enhanced protection level in extreme scenarios. This disclosure utilizes a fire extinguishing component to achieve rapid fire extinguishing and cooling of the battery in the event of thermal runaway, making the battery thermal runaway phenomenon controllable.

[0098] 2. Accuracy of battery thermal runaway testing. This disclosure utilizes an adjustable heating unit 5 and an arc-shaped structure at the tail of the heating unit 5 to ensure constant heating power during battery thermal runaway testing, and the temperature detection unit in the battery state detection unit can accurately reflect the trigger temperature of battery thermal runaway.

[0099] 3. High reliability of battery thermal runaway testing. This disclosure reduces changes in external conditions caused by human operation, and the visualization of parameters (such as pressure data) improves the consistency and comparability of battery thermal runaway testing.

[0100] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery thermal runaway testing device, characterized in that, include: The housing and position adjustment assembly, wherein the housing is provided with a support platform, a first clamping plate, a second clamping plate and a fire extinguishing assembly; The support platform is located between the first clamping plate and the second clamping plate, and the support platform is used to place the battery to be tested. The first clamping plate and the second clamping plate are arranged in parallel, and the first clamping plate is provided with a first receiving groove for accommodating the heating unit on the side near the support platform; The second clamping plate has a second receiving slot for setting up the battery status detection unit on the side near the support platform; The fire extinguishing component is configured to perform a cooling operation on the battery under test when thermal runaway of the battery under test is detected by the battery status detection unit. The position adjustment component is configured to drive the first clamp and the second clamp to move in a direction close to the battery under test.

2. The battery thermal runaway testing device according to claim 1, characterized in that, The position adjustment assembly includes an operating part and a screw; The operating part is fixed to one end of the screw and is located outside the housing; The screw is arranged in a direction perpendicular to the first clamping plate and the second clamping plate, and the end of the screw away from the operating part passes through the side wall of the housing, the threaded hole of the first clamping plate and the threaded hole of the second clamping plate in sequence.

3. The battery thermal runaway testing device according to claim 2, characterized in that, The battery status detection unit includes a pressure detection unit; The operating unit is provided with a display unit, which is connected to the pressure detection unit and is configured to display the pressure data detected by the pressure detection unit.

4. The battery thermal runaway testing device according to claim 2, characterized in that, The screw is provided with a first mating section and a second mating section along the axial direction. The first mating section mates with the threaded hole of the first clamping plate, and the second mating section mates with the threaded hole of the second clamping plate. The thread directions of the first mating section and the second mating section are different.

5. The battery thermal runaway testing device according to claim 1, characterized in that, The first clamping plate is also provided with a connector and a mounting hole penetrating the first receiving groove; the heating unit is provided with a connection hole adapted to the mounting hole; The connector passes through the mounting hole and the connection hole of the heating unit to install the heating unit in the first receiving groove.

6. The battery thermal runaway testing device according to claim 1, characterized in that, The heating unit is configured corresponding to the battery under test, and the heating unit has an arc-shaped structure facing the tail of the battery under test.

7. The battery thermal runaway testing device according to claim 1, characterized in that, The fire extinguishing assembly includes a fire extinguishing agent storage unit, a fire extinguishing agent injection unit, and an electromagnetic control device; A heat insulation plate is provided between the fire extinguishing agent storage section and the second clamping plate; The extinguishing agent spraying unit is installed on the side wall of the housing, the nozzle of the extinguishing agent spraying unit faces the support platform, and the extinguishing agent spraying unit is connected to the extinguishing agent storage unit through a pipeline; The electromagnetic control device is configured to control the connection and disconnection between the fire extinguishing agent storage section and the pipeline based on the battery state of the battery under test.

8. The battery thermal runaway testing device according to claim 1, characterized in that, The bottom plate of the housing is equipped with guide rails; The bottom of the first clamping plate is provided with a first slider, and the first clamping plate is assembled onto the base plate by cooperating with the guide rail through the first slider; The bottom of the second clamping plate is provided with a second slider, and the second clamping plate is assembled onto the base plate by cooperating with the guide rail through the second slider.

9. The battery thermal runaway testing device according to claim 8, characterized in that, The guide rail is provided with a first limiting module and a second limiting module on both sides; The first limiting module is used to limit the movement position of the first clamping plate; The second limiting module is used to limit the movement position of the second clamping plate.

10. The battery thermal runaway testing device according to claim 1, characterized in that, The battery thermal runaway test device also includes a power module and heating leads corresponding to each of the heating units; The power module is located outside the housing; One end of the heating lead is connected to the output end of the power module, and the other end passes through the lead hole of the housing and the wire groove on the first clamping plate in sequence to form an electrical connection with the corresponding heating unit; the wire groove and the receiving groove are arranged one-to-one, one end of the wire groove is connected to the interior of the corresponding receiving groove, and the other end passes through the side wall of the first clamping plate.

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