Battery thermal runaway testing device

Abstract

The utility model relates to the technical field of battery testing, in particular to a battery thermal runaway testing device, which is used for slitting a semi-finished cigarette product into a finished cigarette product and comprises an explosion-proof box body and a clamping component which is arranged in the explosion-proof box body and is used for fixing a battery, the clamping assembly comprises a base and a pressing cover, grooves are formed in the base and the pressing cover, and when the clamping assembly fixes a battery, the two grooves are matched with each other to form a clamping area used for clamping the battery; the heating piece is arranged in the clamping area and is used for heating the battery; according to the utility model, the battery and the heating element can be firmly fixed and stably attached, so that the reliability of a test result is improved, and the test safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a battery thermal runaway testing device. Background Art

[0002] Battery thermal runaway testing can assess battery safety performance under extreme conditions, ensuring the safety of battery products during design, manufacturing, and use. The basic principle of battery thermal runaway testing is to induce runaway chemical reactions within the battery through external means (such as heating), observe and record the entire process from normal to thermal runaway. By analyzing parameters such as temperature changes, voltage changes, and gas emissions, the battery's thermal stability can be understood and failure modes can be predicted. This provides data support for battery design optimization and helps prevent fires or explosions caused by battery failure.

[0003] The utility model patent with announcement number CN218586113U discloses a heating device for thermal runaway testing of a battery pack, including a battery module, characterized in that it also includes a resistance wire and a DC power supply. The resistance wire is wound around the outer surface of a single cell in the middle of the battery module, and two power lines are led out to connect to the DC power supply. The length of the resistance wire is set to 1000±10mm, and the resistance value is set to 22±2Ω. When working, the DC power supply is turned on, and the single cell is heated by the heat generated by the resistance wire. The single cell will produce a thermal runaway explosion due to the heating, and the heat of the explosion will rush out from the positive electrode cap of the single cell.

[0004] The aforementioned testing device efficiently performs thermal runaway testing by heating the battery cell through a resistance wire wrapped around the cell surface. However, because batteries may generate expansion forces during thermal runaway, leading to deformation or displacement, existing testing devices provide unstable restraints on the battery. This makes it impossible to ensure that heating elements, such as the resistance wire, located on the battery surface maintain proper contact with the battery during testing. This not only affects the accuracy of test results but can also increase the risk of battery explosion due to collisions caused by the heating elements. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a battery thermal runaway testing device, which can ensure that the battery and the heating element can be firmly fixed and maintain a stable fit, thereby increasing the reliability of the test results and improving the safety of the test.

[0006] The technical solution to the problem solved by the present invention is to provide a battery thermal runaway testing device, comprising an explosion-proof box and a clamping assembly arranged in the explosion-proof box and used to fix the battery; the clamping assembly comprises a base and a pressure cover, and the base and the pressure cover are both provided with grooves. When the clamping assembly fixes the battery, the two grooves cooperate with each other to form a clamping area for clamping the battery; and the utility model also includes a heating element arranged in the clamping area and used to heat the battery.

[0007] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following feature: the heating component is an electric heating belt, and the electric heating belt is wound around the surface of the battery.

[0008] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following characteristics: one side edge of the base is hinged to one side of the pressure cover, and the other side edge of the base is detachably connected to the other side edge of the pressure cover.

[0009] Furthermore, the battery thermal runaway testing device provided by the present invention may also have the following characteristics: it also includes a pressurizing assembly for limiting the movement of the pressure cover in the vertical direction, and the pressurizing assembly includes a pressure block provided above the pressure cover and abutting against the pressure cover.

[0010] Furthermore, the battery thermal runaway testing device provided by the present invention may also have the following feature: the pressing block is movable in the vertical direction.

[0011] Furthermore, the battery thermal runaway testing device provided by the present invention may also have the following characteristics: the pressurizing assembly also includes a power unit for driving the pressure block to move; the explosion-proof box is provided with at least one through hole, the power unit is arranged outside the explosion-proof box, and the power unit is connected to the pressure block by a guide rod passing through the hole.

[0012] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following characteristics: the power unit includes a screw, a screw nut sleeved on the outside of the screw, a connecting plate, and a driving member for driving the screw to rotate; the screw is arranged at the output end of the driving member, the screw nut is connected to the connecting plate, and the connecting plate is connected to at least one of the guide rods.

[0013] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following features: it also includes a monitoring component, which includes a camera probe for photographing and recording the test process inside the explosion-proof box and an infrared temperature measurement unit for monitoring battery temperature changes.

[0014] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following features: it also includes a display for displaying the test status inside the explosion-proof box, and the display is signal-connected to the monitoring component.

[0015] Furthermore, the battery thermal runaway test device provided by the present invention may also have the following feature: it also includes a vent valve provided on the explosion-proof box.

[0016] The beneficial effects of the utility model are:

[0017] 1. In this application, by placing the battery on the base and closing it with a pressure cover, the two grooves on the base and the pressure cover cooperate with each other to form a clamping area suitable for the shape and size of a specific battery, ensuring that the battery and the heating element located in the clamping area can be firmly fixed and maintain a stable fit, thereby increasing the reliability of the test results and improving the safety of the test.

[0018] 2. In the present application, a pressure block is provided above the pressure cover and abuts against the pressure cover. The pressure block can apply downward pressure to the pressure cover, so that the pressure cover is tightly pressed on the battery, thereby preventing the expansion or displacement of the battery during the test from causing the pressure cover to flip up and causing the heating element to loosen. At the same time, it can also avoid large-scale splashing in the event of an explosion, further ensuring the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0020] Figure 1 This is a schematic structural diagram of the utility model from a first perspective;

[0021] Figure 2 This is a schematic structural diagram of the second viewing angle of the present invention;

[0022] Figure 3 This is a schematic structural diagram of the clamping assembly of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of the pressurizing component of the present invention.

[0024] In the picture:

[0025] 1. Explosion-proof box; 11. Box cover; 12. Box body; 13. Buckle; 14. Buckle seat; 15. Positioning groove; 16. Boss; 2. Clamping assembly; 21. Pressure cover; 22. Base; 23. Groove; 24. Locating pin; 25. Waist-shaped hole; 26. Clamping area; 31. Heating element; 32. Electrical connector; 33. Socket; 4. Pressurizing assembly; 41. Pressure block; 42. Guide rod; 43. Shoulder nut; 44. Screw; 45. Screw nut; 46. Connecting plate; 47. Driving element; 5. Camera probe; 6. Infrared temperature measuring unit; 7. Display; 8. Breathing valve. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The utility model provides a battery thermal runaway test device, the specific structure of which is as follows:

[0028] A battery thermal runaway test device, such as Figures 1 to 4 As shown, it includes an explosion-proof box body 1 and a clamping assembly 2 arranged in the explosion-proof box body 1 for fixing the battery; the clamping assembly 2 includes a base 22 and a pressure cover 21, and both the base 22 and the pressure cover 21 are provided with grooves 23. When the clamping assembly 2 fixes the battery, the two grooves 23 cooperate with each other to form a clamping area 26 for clamping the battery. The groove 23 can be in an arc shape, and the clamping area 26 formed by the two grooves 23 has a cylindrical structure for clamping cylindrical batteries; the groove 23 can also be square, and the clamping area 26 formed by the two grooves 23 has a cubic structure for clamping square batteries. This embodiment takes cylindrical batteries as an example, and refer to Figure 3The groove 23 is arc-shaped. The two grooves 23 cooperate with each other to form a cylindrical clamping area 26 for clamping cylindrical batteries. The battery thermal runaway test device also includes a heating element 31 located in the clamping area 26 for heating the battery. When in use, the battery is placed on the base 22 and closed with the pressure cover 21. The two grooves 23 will cooperate with each other to form a clamping area 26 suitable for the shape and size of the specific battery, ensuring that the battery and the heating element 31 located in the clamping area 26 can be firmly fixed and maintain a stable fit, thereby increasing the reliability of the test results and improving the safety of the test. The heating element 31 is preferably an electric heating belt, and more preferably a silicone rubber electric heating belt with good high temperature resistance. The electric heating belt is wrapped around the surface of the battery to evenly transfer heat to the battery. To ensure reliable power supply to the electric heating belt, a socket 33 is provided on the explosion-proof box 1. The heating element 31 is connected to the socket 33 through an electrical connector 32. The socket 33 can be powered by either DC or AC.

[0029] In order to facilitate the placement and removal of the battery in the clamping area 26, as shown in FIG. Figure 3 As shown, one side edge of the base 22 is hingedly connected to one side edge of the gland 21, and the other side edge of the base 22 is detachably connected to the other side edge of the gland 21. In a specific embodiment, the detachable connection is a pin-and-hole connection. Two locating pins 24 are provided on the base 22, and two waist-shaped holes 25 are provided at corresponding positions on the gland 21. The base 22 and the gland 21 are connected by the locating pins 24 and the waist-shaped holes 25. When the gland 21 is closed, the locating pins 24 serve to position the gland 21. When the gland 21 needs to be opened, the locating pins 24 can be simply pulled out of the waist-shaped holes 25.

[0030] like Figure 1 As shown, the explosion-proof box 1 includes a box body 12 and a box cover 11 disposed above the box body 12. At least one buckle 13 is provided on each side of the box cover 11. The box body 12 is provided with a buckle seat 14 corresponding to the buckle 13. The explosion-proof box 1 is sealed by locking the buckle 13 with the buckle seat 14. In this embodiment, two buckles 13 are preferably provided on each side of the box cover 11 to ensure the reliability of the connection between the box cover 11 and the box body 12. Figure 2 and Figure 4 As shown, in order to facilitate the positioning of the box body 12 and the box cover 11 when they are connected, an annular positioning groove 15 is provided on the outer edge of the opening of the box body 12, and a corresponding annular boss 16 is provided on the box cover 11. When the box cover 11 is connected to the box body 12, the boss 16 is snapped into the positioning groove 15.

[0031] The battery thermal runaway test device also includes a pressurizing assembly 4 for limiting the vertical movement of the pressure cover 21. The pressurizing assembly 4 includes a pressure block 41 provided above the pressure cover 21 and abutting against the pressure cover 21. The pressure block 41 can apply downward pressure to the pressure cover 21 to press the pressure cover 21 tightly against the battery, thereby preventing the expansion or displacement of the battery during the test from causing the pressure cover 21 to flip up and causing the heating element 31 to loosen. At the same time, it can also avoid large-scale splashing in the event of an explosion, thereby ensuring the safety of the test.

[0032] In some embodiments, in order to adjust the pressure of the pressing block 41 on the pressure cover 21 according to actual needs, the pressing block 41 is movable in the vertical direction. Figure 4 As shown, the pressurizing assembly 4 also includes a power unit for driving the pressure block 41 to move. In order to protect the power unit from high temperature and potential explosion, the power unit is arranged outside the explosion-proof box 1, specifically above the box cover 11. Two through holes are provided on the explosion-proof box 1, and the power unit and the pressure block 41 are connected by a guide rod 42 passing through the through holes. Among them, the through hole is preferably a stepped hole, and a shoulder nut 43 is provided on the guide rod 42. The shoulder of the shoulder nut 43 is arranged in the stepped hole to limit the movement limit of the guide rod 42 in the vertical direction, thereby limiting the height adjustment limit of the pressure block 41 and avoiding excessive downward pressure of the pressure block 41. The power unit includes a screw 44, a screw nut 45 sleeved on the outside of the screw 44, a connecting plate 46, and a driving member 47 for driving the screw 44 to rotate. The driving member 47 can be a manual driving member or an electric driving member. In this embodiment, a manually rotated handwheel is preferably used as the driving member 47. One end of the screw rod 44 is connected to the hand wheel, and the other end is fixed to the box cover 11. The screw nut 45 is connected to the connecting plate 46, and the connecting plate 46 is connected to the two guide rods 42. During use, the hand wheel is manually turned to rotate the screw rod 44, and the rotation of the screw rod 44 drives the screw nut 45 to move, thereby moving the connecting plate 46. The movement of the connecting plate 46 further drives the pressure block 41 at the other end of the guide rod 42 to move accordingly, achieving the effect of adjusting the pressure block 41 to move in the vertical direction.

[0033] like Figure 1 and Figure 2 As shown, the battery thermal runaway test device also includes a monitoring component, which includes a camera 5 for capturing and recording the test process inside the explosion-proof box 1 and an infrared temperature measurement unit 6 for monitoring battery temperature changes. The infrared temperature measurement unit 6 is preferably an infrared temperature measurement window capable of imaging and measuring the temperature of the internal environment of the explosion-proof box 1. As a further improvement to this embodiment, the battery thermal runaway test device also includes a display 7 for displaying the test status inside the explosion-proof box 1. The display 7 is signal-connected to the monitoring component and is used to display the images captured by the camera 5 and / or the images of the internal environment of the explosion-proof box 1 captured by the infrared temperature measurement unit 6, so as to monitor the test process inside the box and the temperature changes inside the battery during the test.

[0034] In order to balance the internal and external air pressure of the box and reduce the risk of internal explosion, the battery thermal runaway testing device also includes a breathable valve 8 provided on the explosion-proof box 1.

[0035] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0036] In the description of the invention, it should be noted that relational terms such as first and second, etc. are used only 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 "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "front," "back," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "several" means two or more.

[0038] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific embodiments of the present invention are not limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A battery thermal runaway test device, characterized in that: The invention comprises an explosion-proof box (1) and a clamping assembly (2) disposed in the explosion-proof box (1) for fixing a battery, wherein the clamping assembly (2) comprises a base (22) and a pressure cover (21), wherein both the base (22) and the pressure cover (21) are provided with grooves (23), and when the clamping assembly (2) fixes the battery, the two grooves (23) cooperate with each other to form a clamping area (26) for clamping the battery; and further comprises a heating element (31) disposed in the clamping area (26) for heating the battery.

2. The battery thermal runaway testing device according to claim 1, characterized in that: The heating element (31) is an electric heating belt, and the electric heating belt is wound around the surface of the battery.

3. The battery thermal runaway testing device according to claim 1, characterized in that: One side edge of the base (22) is hinged to one side edge of the pressure cover (21), and the other side edge of the base (22) is detachably connected to the other side edge of the pressure cover (21).

4. The battery thermal runaway testing device according to claim 1, characterized in that: It also includes a pressurizing assembly (4) for limiting the movement of the press cover (21) in the vertical direction, wherein the pressurizing assembly (4) includes a press block (41) disposed above the press cover (21) and abutting against the press cover (21).

5. The battery thermal runaway testing device according to claim 4, characterized in that: The pressing block (41) is movable in a vertical direction.

6. The battery thermal runaway testing device according to claim 5, characterized in that: The pressurizing assembly (4) further includes a power unit for driving the pressing block (41) to move; the explosion-proof housing (1) is provided with at least one through hole, the power unit is arranged outside the explosion-proof housing (1), and the power unit is connected to the pressing block (41) via a guide rod (42) passing through the through hole.

7. The battery thermal runaway testing device according to claim 6, characterized in that: The power unit includes a screw rod (44), a screw rod nut (45) sleeved on the outside of the screw rod (44), a connecting plate (46), and a driving member (47) for driving the screw rod (44) to rotate; the screw rod (44) is arranged at the output end of the driving member (47), the screw rod nut (45) is connected to the connecting plate (46), and the connecting plate (46) is connected to at least one of the guide rods (42).

8. The battery thermal runaway testing device according to claim 1, characterized in that: It also includes a monitoring component, which includes a camera probe (5) for photographing and recording the internal testing process of the explosion-proof box (1) and an infrared temperature measuring unit (6) for monitoring battery temperature changes.

9. The battery thermal runaway testing device according to claim 8, characterized in that: It also includes a display (7) for displaying the test status inside the explosion-proof box (1), and the display (7) is connected to the monitoring component signal.

10. The battery thermal runaway testing device according to any one of claims 1 to 9, characterized in that: It also includes a vent valve (8) provided on the explosion-proof box (1).

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