Thermal runaway testing device

Abstract

The utility model relates to the technical field of lithium battery testing, in particular to a thermal runaway testing device. The thermal runaway device comprises an explosion-proof box, the explosion-proof box is internally provided with a test station used for placing a to-be-tested piece, the two sides of the test station in the first direction are provided with first abutting parts, the two sides of the test station in the second direction are provided with second abutting parts, and the two sides of the test station in the third direction are provided with third abutting parts. The at least one first abutting part, the at least one second abutting part and the at least one third abutting part can move. All the abutting parts can abut against the to-be-tested piece so that the to-be-tested piece can be fixed to the testing station, and then the positions of the movable abutting parts in one or more directions can be adjusted so that the stress condition of the to-be-tested piece can be adjusted. Therefore, a special fixing tool does not need to be customized for the to-be-tested piece, so that the test cost is reduced to a certain extent; and meanwhile, the to-be-tested piece is fixed and pressurized in the explosion-proof box and does not need to move later, so that the influence on the accuracy of a test result due to the change of the stress condition of the to-be-tested piece is avoided.

Description

Technical Field

[0001] This application relates to the field of lithium battery testing technology, and in particular to a thermal runaway testing device. Background Technology

[0002] Thermal runaway testing of lithium-ion batteries is typically conducted in an explosion-proof enclosure to ensure safety. During testing, a custom-designed fixture is used to secure the device under test (cell or battery module) and apply predetermined pressure. The secured device is then moved into the explosion-proof enclosure for the thermal runaway test. However, this process not only increases the overall testing cost, but also, due to factors such as handling methods and equipment precision, the actual stress state of the device under test may change uncontrollably during the transfer to the explosion-proof enclosure. This can cause the test conditions to deviate from the preset parameters, affecting the accuracy of the final test results and failing to accurately reflect the device's performance in real-world applications. Utility Model Content

[0003] The purpose of this invention is to provide a thermal runaway testing device that can reduce testing costs and improve testing accuracy to a certain extent.

[0004] This utility model provides a thermal runaway testing device, including an explosion-proof box;

[0005] The explosion-proof box is equipped with a test station. The test station has a first abutment on both sides of the first direction, a second abutment on both sides of the second direction, and a third abutment on both sides of the third direction.

[0006] The first abutting part, the second abutting part, and the third abutting part can all abut against the test piece at the test station, and at least one of the first abutting parts is movable along the first direction, at least one of the second abutting parts is movable along the second direction, and at least one of the third abutting parts is movable along the third direction.

[0007] The first direction, the second direction, and the third direction are all perpendicular to each other.

[0008] Furthermore, the movable first abutment, the movable second abutment, and the movable third abutment are all movable abutment parts;

[0009] A drive assembly is connected to the movable abutment, and the drive assembly includes a transmission screw and a transmission block;

[0010] The transmission block is movably disposed along the moving direction of the movable abutment, and the transmission block is connected to the movable abutment;

[0011] The length direction of the transmission screw is arranged along the moving direction of the movable abutment, the transmission screw is rotatable about its own axis, and the transmission screw is screwed to the transmission block.

[0012] Furthermore, a handwheel is provided on the outside of the explosion-proof box. The handwheel is rotatably disposed inside the explosion-proof box and is coaxially connected to the transmission screw.

[0013] Furthermore, a drive motor is provided on the outside of the explosion-proof box, and one end of the transmission screw extends out of the explosion-proof box and is connected to the drive end of the drive motor so that it can rotate under the drive of the drive motor.

[0014] Furthermore, at least one of the first abutting parts, at least one of the second abutting parts, and at least one of the third abutting parts are provided with pressure sensors.

[0015] Furthermore, the explosion-proof box has a hinged door, and both the door and the box body are provided with fixing seats for connecting explosion-proof chains.

[0016] Furthermore, the explosion-proof box is equipped with an exhaust fan on its top.

[0017] Furthermore, the explosion-proof box has a viewing window on its door.

[0018] Furthermore, an imaging device is provided on the outside of the explosion-proof box, and the imaging device is installed on the door of the explosion-proof box and opposite to the viewing window.

[0019] Furthermore, the explosion-proof box is provided with a pressure relief port, and a movable cover plate is hinged to the pressure relief port to seal the pressure relief port.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The thermal runaway device provided by this utility model includes an explosion-proof box, which contains a test station. The test station has abutment parts in each direction within the explosion-proof box to fix the component under test (such as a battery cell or battery module) at the test station and apply a predetermined pressure to the component under test. Specifically, the test station has a first direction, a second direction, and a third direction that are mutually perpendicular. First abutment parts are provided on both sides of the first direction (e.g., up-down direction), second abutment parts are provided on both sides of the second direction (e.g., left-right direction), and third abutment parts are provided on both sides of the third direction (e.g., front-back direction). Furthermore, at least one first abutment part is movable along the first direction, making the distance between the two first abutment parts adjustable; at least one second abutment part is movable along the second direction, making the distance between the two second abutment parts adjustable; and at least one third abutment part is movable along the third direction, making the distance between the two third abutment parts adjustable.

[0022] In actual testing, the test piece can be placed on the first abutment at the bottom, and the test piece should abut against the second abutment on the left and the third abutment on the rear. Then, the first abutment at the top should be moved down to abut against the test piece, the second abutment on the right should be moved to the left to abut against the test piece, and the third abutment on the front should be moved back to abut against the test piece. In this way, the test piece can be fixed at the test position by using the abutments in various directions. Then, the position of the movable abutments in one or more directions can be adjusted to adjust the force on the test piece as needed.

[0023] Therefore, when performing thermal runaway testing on the test piece, the thermal runaway testing device of this application can adapt to the fixing and pressurization of test pieces of any size by utilizing the cooperation between the abutment parts in various directions, without the need to customize special fixing fixtures for the test piece, thereby reducing testing costs to a certain extent; at the same time, the test piece is fixed and pressurized in the explosion-proof box, and there is no need to move the test piece afterwards, thereby avoiding changes in the stress condition of the test piece that may affect the accuracy of the test results. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the thermal runaway testing device provided in an embodiment of the present invention from a first-view perspective.

[0026] Figure 2This is a schematic diagram of the thermal runaway testing device provided in an embodiment of the present invention from a second perspective.

[0027] Figure 3 A schematic diagram of the movable contact part and drive assembly of the thermal runaway testing device provided in this embodiment of the utility model.

[0028] Figure label:

[0029] 1-Explosion-proof box, 11-Box door, 12-Viewing window, 13-Imaging equipment, 2-Test piece, 3-First abutment part, 4-Second abutment part, 5-Third abutment part, 6-Modible abutment part, 7-Drive assembly, 71-Guide groove, 72-Transmission block, 73-Transmission screw, 74-Handwheel;

[0030] a - First direction, b - Second direction, c - Third direction. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0032] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0033] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following reference Figures 1 to 3 This application describes a thermal runaway testing apparatus according to some embodiments.

[0037] This application provides a thermal runaway testing device, such as... Figure 1 and Figure 2 As shown, the thermal runaway device includes an explosion-proof box 1, which is equipped with a test station. The explosion-proof box 1 is provided with abutment parts in each direction of the test station, so as to fix the test piece 2 (such as a battery cell or battery module) at the test station by using the abutment parts in each direction, and to apply a predetermined pressure to the test piece 2.

[0038] Specifically, the testing station has a first direction a, a second direction b, and a third direction c that are perpendicular to each other. The first direction a (e.g., up and down) of the testing station is provided with a first abutment 3 on both sides, the second direction b (e.g., left and right) of the testing station is provided with a second abutment 4 on both sides, and the third direction c (e.g., front and back) of the testing station is provided with a third abutment 5 on both sides. Furthermore, at least one first abutment 3 is movable along the first direction a, so that the distance between the two first abutment 3s is adjustable; at least one second abutment 4 is movable along the second direction b, so that the distance between the two second abutment 4s is adjustable; and at least one third abutment 5 is movable along the third direction c, so that the distance between the two third abutment 5s is adjustable.

[0039] In actual testing, the test piece 2 can be placed on the lower first abutment 3, and the test piece 2 can be made to abut against the left second abutment 4 and the rear third abutment 5. Then, the upper first abutment 3 is moved down to abut against the test piece 2, the right second abutment 4 is moved to the left to abut against the test piece 2, and the front third abutment 5 is moved back to abut against the test piece 2. In this way, the test piece 2 is fixed at the test position by using the abutments in various directions. Then, the position of one or more movable abutments in one or more directions can be adjusted to adjust the force on the test piece 2 as needed.

[0040] Therefore, when the thermal runaway testing device of this application performs thermal runaway testing on the test piece 2, the cooperation between the abutments in various directions can accommodate the fixing and pressurization of the test piece 2 of any size, without the need to customize special fixing fixtures for the test piece 2, thereby reducing the testing cost to a certain extent; at the same time, the test piece 2 is fixed and pressurized in the explosion-proof box 1, and there is no need to move the test piece 2 afterwards, thereby avoiding changes in the stress condition of the test piece 2 that would affect the accuracy of the test results.

[0041] In addition, when testing the test piece 2, which is a soft-pack battery or a single cylindrical battery with low energy density, the abutments in all directions can form a relatively sealed space to collect the combustion waste generated during the thermal runaway explosion of the battery, and prevent the particles generated by the explosion from splashing and causing injury to the test personnel at the test site.

[0042] In one embodiment of this application, preferably, as shown below, Figure 2 and Figure 3 As shown, the movable abutment (including the movable first abutment 3, the second abutment 4, and the third abutment 5) is defined as the active abutment 6. Each active abutment 6 is connected to a drive component 7 so as to drive the active abutment 6 to move. For example, when the active abutment 6 is the movable first abutment 3, it can move along the first direction a under the drive of the corresponding drive component 7. When the active abutment 6 is the movable second abutment 4, it can move along the second direction b under the drive of the corresponding drive component 7. When the active abutment 6 is the movable third abutment 5, it can move along the third direction c under the drive of the corresponding drive component 7.

[0043] In this embodiment, preferably, as follows: Figure 3 As shown, the drive assembly 7 includes a transmission screw 73 and a transmission block 72. For a set of movable abutments 6 and the drive assembly 7, the transmission block 72 of the drive assembly 7 is slidably disposed within the explosion-proof enclosure 1 along the moving direction of the movable abutment 6, and the transmission block 72 is connected to the movable abutment 6. The transmission screw 73 is rotatably disposed within the explosion-proof enclosure 1 about its own axis, with its length direction along the moving direction of the movable abutment 6, and the transmission block 72 is screwed to the transmission screw 73. Thus, by rotating the transmission screw 73, the transmission screw 73 can drive the movable abutment 6 to reciprocate along the length direction of the transmission screw 73.

[0044] Preferably, the drive assembly 7 includes a guide groove 71, which is fixed to the inner wall of the explosion-proof box 1. The length direction of the guide groove 71 is arranged along the moving direction of the movable abutment 6. The transmission screw 73 is rotatably installed between the two ends of the guide groove 71 along its length direction. The transmission block 72 is slidably disposed in the guide groove 71 along its length direction and screwed to the transmission screw 73. Thus, the guide groove 71 is used to realize the rotational installation and protection of the transmission screw 73, while also realizing the sliding guidance of the transmission block 72.

[0045] Regarding one driving method for the transmission screw 73, in this embodiment, preferably, as follows: Figures 1 to 3 As shown, a handwheel 74 is provided on the outside of the explosion-proof box 1. The handwheel 74 is rotatably installed inside the explosion-proof box 1. One end of the transmission screw 73 is coaxially connected to the handwheel 74, so that by rotating the handwheel 74, the transmission screw 73 can be rotated, so that the transmission block 72 drives the movable abutment part 6 to move.

[0046] Regarding another driving method for the transmission screw 73, in this embodiment, preferably, a drive motor is provided on the outside of the explosion-proof box 1, and one end of the transmission screw 73 extends to the outside of the explosion-proof box 1 and is connected to the drive end of the drive motor, so that the drive motor drives the transmission screw 73 to rotate, so that the transmission block 72 drives the movable abutment part 6 to move.

[0047] In one embodiment of this application, preferably, at least one first abutment 3 is provided with a pressure sensor to monitor the force on the test piece 2 in the first direction a; at least one second abutment 4 is provided with a pressure sensor to monitor the force on the test piece 2 in the second direction b; and at least one third abutment 5 is provided with a pressure sensor to monitor the force on the test piece 2 in the third direction c.

[0048] In one embodiment of this application, preferably, as shown below, Figure 1 As shown, the explosion-proof box 1 has a hinged door 11 for opening or closing. Both the door 11 and the box body are equipped with fixing seats for connecting the explosion-proof chain, thereby improving the safety level of the explosion-proof box 1 to a certain extent.

[0049] In one embodiment of this application, preferably, the top of the explosion-proof box 1 is provided with an exhaust fan, such as an exhaust fan or a blower, to exhaust the gas generated inside the explosion-proof box 1 due to the thermal runaway of the test object 2.

[0050] In one embodiment of this application, preferably, as shown below, Figure 1 As shown, the explosion-proof box 1 has a viewing window 12 on its door 11 so that the thermal runaway test process can be observed through the viewing window 12.

[0051] Preferably, such as Figure 1The explosion-proof box 1 is equipped with an imaging device 13, such as a camera, on its outer side. The imaging device 13 is installed on the box door 11 and faces the viewing window 12 so that the thermal runaway test process can be monitored through the imaging device 13.

[0052] In one embodiment of this application, preferably, the explosion-proof box 1 is provided with a pressure relief port, for example, the pressure relief port is set on the side wall of the box opposite to the box door 11, and a movable cover plate is hinged to the pressure relief port. Before thermal runaway occurs, the movable cover plate can seal the pressure relief port to ensure the airtightness of the test environment; when thermal runaway occurs, the gas generated in the explosion-proof box 1 can push the movable cover plate to open the pressure relief port to release pressure, thereby ensuring the safety of the test process.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thermal runaway test device, characterized in that, Including explosion-proof boxes; The explosion-proof box is equipped with a test station. The test station has a first abutment on both sides of the first direction, a second abutment on both sides of the second direction, and a third abutment on both sides of the third direction. The first abutting part, the second abutting part, and the third abutting part can all abut against the test piece at the test station, and at least one of the first abutting parts is movable along the first direction, at least one of the second abutting parts is movable along the second direction, and at least one of the third abutting parts is movable along the third direction. The first direction, the second direction, and the third direction are all perpendicular to each other.

2. The thermal runaway test device of claim 1, wherein, The movable first abutment, the movable second abutment, and the movable third abutment are all movable abutment parts; A drive assembly is connected to the movable abutment, and the drive assembly includes a transmission screw and a transmission block; The transmission block is movably disposed along the moving direction of the movable abutment, and the transmission block is connected to the movable abutment; The length direction of the transmission screw is arranged along the moving direction of the movable abutment, the transmission screw is rotatable about its own axis, and the transmission screw is screwed to the transmission block.

3. The thermal runaway test device of claim 2, wherein, The explosion-proof box is equipped with a handwheel on the outside. The handwheel is rotatably mounted inside the explosion-proof box and is coaxially connected to the transmission screw.

4. The thermal runaway test device of claim 2, wherein, The explosion-proof box is equipped with a drive motor on its outside. One end of the transmission screw extends out of the explosion-proof box and is connected to the drive end of the drive motor so that it can rotate under the drive of the drive motor.

5. The thermal runaway test device of claim 1, wherein, Pressure sensors are provided on at least one of the first abutting parts, at least one of the second abutting parts, and at least one of the third abutting parts.

6. The thermal runaway test device of claim 1, wherein, The explosion-proof box has a hinged door, and both the door and the box body are equipped with fixing seats for connecting explosion-proof chains.

7. The thermal runaway test device of claim 1, wherein, The explosion-proof box is equipped with an exhaust fan on top.

8. The thermal runaway test device of claim 1, wherein, The explosion-proof box has a viewing window on its door.

9. The thermal runaway test device of claim 8, wherein, An imaging device is provided on the outside of the explosion-proof box. The imaging device is installed on the door of the explosion-proof box and is opposite to the viewing window.

10. The thermal runaway test device of claim 1, wherein, The explosion-proof box is equipped with a pressure relief port, and a movable cover plate is hinged to the pressure relief port to seal it.

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