A kind of power battery heat insulation protective material detection equipment

Abstract

The application discloses a kind of power battery heat insulation protective material detection equipment, it is related to battery heat insulation protective material detection technical field, including base, further include: fixed on the base analog box, the top of the analog box is opened, and inner wall is fixed with baffle;Upper cover is arranged above the analog box and can move up and down, the upper cover is clamped and fixed between heat insulation sheet and the analog box, and the heat insulation sheet forms two airtight spaces up and down;First thermocouple is installed in the upper cover interior for monitoring the top temperature of heat insulation sheet;Test component, test component first heats the space above baffle, to simulate the heating stage of battery cell, after continuing predetermined time, high-temperature high-pressure airflow is released to baffle and is impacted, to simulate battery cell explosion and spray stage.The application detects by simulating the actual use environment of battery cell and heat insulation material, to improve the accuracy and objectivity of detection result.

Description

Technical Field

[0001] This invention relates to the field of battery thermal insulation and protection material testing technology, specifically to a testing device for power battery thermal insulation and protection materials. Background Technology

[0002] Thermal insulation materials are an essential part of power batteries, playing a dual role in isolating heat sources and protecting the battery. It can be said that the thermal insulation performance of the thermal insulation sheets in the battery plays a crucial role in the safety and stability of the battery.

[0003] Currently, Chinese Patent Publication No. CN114563443A discloses a testing device for the thermal insulation performance of battery insulation materials. This testing device fixes the insulation material between a carrier plate and a pressure plate, preventing the insulation material from moving during testing. The entire test is conducted inside a combustion chamber, ensuring the stability of the flame combustion and eliminating the influence of external factors. A thermometer and an exhaust vent at the top of the combustion chamber maintain a constant temperature inside the chamber. A second thermocouple monitors the temperature of the flame in real time, while a first thermocouple monitors the temperature of the upper surface of the substrate layer, enabling the quantification of test data and ensuring the stability and accuracy of the test. The thermal insulation performance of the insulation material can be effectively determined through testing.

[0004] However, the results obtained by this test method are the heat insulation performance of the heat insulation material under normal conditions. In actual use, the best demonstration of the heat insulation performance of the heat insulation material is the state of the battery under special conditions, such as when the battery malfunctions, short-circuits, overheats, or even explodes. Therefore, the test data obtained by the above test is too limited and not accurate enough. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for thermal insulation and protection materials of power batteries, so as to solve at least one technical problem existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing device for thermal insulation and protection materials of power batteries, comprising a base, and further comprising: A simulation box fixed on a base, the top of the simulation box being open and the inner wall being fixed with a partition; An upper pressure cover is installed above the simulation box and can move up and down. The upper pressure cover and the simulation box are used to clamp and fix the heat insulation sheet, and the heat insulation sheet forms two sealed spaces at the top and bottom. A first thermocouple installed inside the upper pressure cover to monitor the top temperature of the insulation sheet; The test component first heats the space above the partition to simulate the heating stage of the battery cell. After a predetermined time, it releases a high-temperature and high-pressure airflow into the partition to simulate the bursting stage of the battery cell. The change in the thermal insulation performance of the insulation sheet is detected by monitoring the temperature of the first thermocouple.

[0007] Preferably, the test component includes a heating component and an impact component; The impact assembly includes a sliding frame slidably installed between the partition and the base, with an opening at the top of the sliding frame. A lifting plate is vertically slidably installed on the inner wall of the sliding frame, and multiple sets of swing rods are rotatably connected between the lifting plate and the partition. A central channel is opened in the center of each swing rod, and a connecting hole is opened on the outer wall of both the lifting plate and the partition. When the swing rod is rotated to a vertical state, the central channel communicates with two connecting holes. The impact assembly also includes an electric cylinder for driving the sliding frame to slide. The heating element includes a heating part installed on the top of the partition and at the bottom of the sliding frame.

[0008] Preferably, the opposing surfaces of the partition and the lifting plate are each embedded with a block, both ends of the swing rod are set as rotating ends, and the central channel passes through the center of the two rotating ends respectively. The interior of each of the two blocks is provided with a circular groove for the rotating end to be rotatably installed, and the circular groove is provided with a central hole communicating with the connecting hole.

[0009] Preferably, a spray gun head is also installed on the top of the partition, and the spray gun head has an ignition structure. The spray gun head is connected to a vent pipe for supplying fuel to it. A switch assembly for controlling the vent pipe is installed on the outer wall of the simulation box, and the trigger end of the switch assembly is located inside the simulation box. A touch head is fixed on the outer wall of the sliding frame. When the touch head contacts the trigger end of the switch assembly, the switch assembly controls the vent pipe to open and simultaneously controls the ignition structure of the spray gun head to ignite.

[0010] Preferably, it also includes a top plate fixed above the base by a support rod, a mounting box fixed at the bottom of the top plate, a guide rod fixed at the top of the upper cover, a limiting hole for sliding the guide rod at the bottom of the mounting box, and an adjustment component for driving the upper cover to move up and down and for limiting its position inside the mounting box.

[0011] Preferably, the adjusting assembly includes a connecting rod rotatably connected to the top of the upper pressure cover, the bottom of the mounting box is provided with a cavity, the top of the cavity is rotatably connected with an elastic telescopic rod, the telescopic end of the elastic telescopic rod is rotatably connected to the connecting rod through a pin, the outer wall of the mounting box is provided with a sliding groove communicating with the cavity, a slider is horizontally slidably installed in the sliding groove, the outer wall of the slider is provided with a handle, and the pin is rotatably installed on the slider. When the elastic telescopic rod and the connecting rod rotate to a vertical state and are in the same straight line, the slider slides to the end of one side of the sliding groove. The adjustment assembly also includes an imbalance structure, which is used to disrupt the straight-line state of the elastic telescopic rod and the connecting rod.

[0012] Preferably, the imbalance structure includes an electromagnet installed on the inner wall of one side of the slide, and the electromagnet is electrically connected to the first thermocouple. The slider is fixed with an iron sheet on the outer wall of the electromagnet, and when the electromagnet is energized, it applies a magnetic attraction force to the iron sheet. The imbalance structure also includes an internal air passage located inside the mounting box and away from the electromagnet. The internal air passage is connected to the slide groove and is connected to the inside of the upper pressure cover through a connecting pipe. When the slider is located at the end of one side of the slide groove, the slider closes the outlet of the internal air passage.

[0013] Preferably, the first thermocouple is located at the center of the upper cover, and a second thermocouple is also installed on the edge of the upper cover, and the second thermocouple monitors the edge of the insulation sheet.

[0014] Preferably, the outer wall of the sliding frame is provided with a vent that can be opened or closed.

[0015] Preferably, both the upper cover and the mating surface of the simulation box are provided with skirts.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: I. This invention improves the accuracy and objectivity of test results by simulating the actual use environment of battery cells and thermal insulation materials.

[0017] Second, this invention places the insulation sheet to be tested above the simulation chamber, and uses an external structure to drive the upper pressure cover to press down, clamping and fixing the insulation sheet. At the same time, a sealed space is formed on the upper and lower sides of the insulation sheet, and the use environment of the insulation sheet is simulated in the space below. Meanwhile, the first thermocouple monitors the temperature of the insulation sheet throughout the process, and compares the temperature changes of the insulation sheet at different stages, thereby detecting the change curve of the insulation performance of the insulation sheet under actual use conditions, thus making the test results more accurate and objective. Attached Figure Description

[0018] Figure 1The three-dimensional representation of the present invention Figure 1 ; Figure 2 The three-dimensional representation of the present invention Figure 2 ; Figure 3 This is the front view of the present invention; Figure 4 For the present invention Figure 3 Sectional view along the middle AA; Figure 5 For the present invention Figure 4 A sectional view along the middle edge BB; Figure 6 For the present invention Figure 5 Enlarged sectional view at point C in the diagram; Figure 7 This is the left view of the present invention; Figure 8 For the present invention Figure 7 Cross-sectional view and enlarged view along the middle DD; Figure 9 For the present invention Figure 9 A sectional stereoscopic view from a specific perspective.

[0019] In the diagram: 1. Base; 2. Top plate; 3. Mounting box; 4. Guide rod; 5. Upper pressure cover; 6. Simulation box; 7. Skirt; 8. Insulation sheet; 9. Cavity; 10. Elastic telescopic rod; 11. Connecting rod; 12. Slide groove; 13. Slider; 14. Pin; 15. Electromagnet; 16. Iron sheet; 17. First thermocouple; 18. Partition plate; 19. Sliding frame; 20. Lifting plate; 21. Swing rod; 22. Insert; 23. Rotating end; 24. Central channel; 25. Connecting hole; 26. Heating element; 27. Second thermocouple; 28. Touch head; 29. ​​Switch assembly; 30. Vent pipe; 31. Spray gun head; 32. Internal air passage; 33. Connecting pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 9 The present invention provides a technical solution: a testing device for thermal insulation and protection materials of power batteries, including a base 1, and further comprising: The simulation box 6 is fixed on the base 1. The top of the simulation box 6 is open and the inner wall is fixed with a partition 18. An upper pressure cover 5 is set above the simulation box 6 and can move up and down. The upper pressure cover 5 and the simulation box 6 are used to clamp and fix the heat insulation sheet 8, and the heat insulation sheet 8 forms two sealed spaces at the top and bottom. A first thermocouple 17 is installed inside the upper pressure cover 5 to monitor the top temperature of the insulation sheet 8; The test component first heats the space above the partition 18 to simulate the heating stage of the battery cell. After a predetermined time, it releases a high-temperature and high-pressure airflow to the partition 18 to simulate the bursting stage of the battery cell. The change in the heat insulation performance of the heat insulation sheet 8 is detected by monitoring the temperature of the first thermocouple 17.

[0022] In order to make the test results of the thermal insulation performance of the thermal insulation sheet more relevant to actual use data, test data under a single environment is particularly limited. Therefore, in this embodiment, the test is conducted by simulating the actual use environment of the battery cell and thermal insulation material to improve the accuracy and objectivity of the test results, as detailed below. The heat insulation sheet 8 to be tested is placed above the simulation box 6, and the upper pressure cover 5 is pressed down by the external structure to clamp and fix the heat insulation sheet 8. At the same time, a sealed space is formed on the upper and lower sides of the heat insulation sheet 8, and the use environment of the heat insulation sheet 8 is simulated in the space below. Meanwhile, the first thermocouple 17 monitors the temperature of the heat insulation sheet 8 throughout the process. Research shows that when a power battery malfunctions, it can be divided into three stages: first, the cell heats up and bulges due to the increased temperature; second, the cell explodes; and third, it starts to burn when the temperature is too high. Correspondingly, the space between the partition 18 and the insulation sheet 8 is heated using the testing component to simulate the heating stage of the battery cell. As the temperature rises, the air pressure in the sealed space also gradually increases. After a predetermined time, the testing component releases a high-temperature and high-pressure airflow to the partition 18 to impact it, simulating the battery cell bursting stage. Because the bursting of the battery cell will cause some damage to the insulation material, its insulation performance will also change. At this time, the temperature change of the insulation sheet 8 at different stages is compared through continuous temperature monitoring by the first thermocouple 17, thereby detecting the change curve of the insulation performance of the insulation sheet 8 under actual use, thus making the test results more accurate and objective.

[0023] In one preferred embodiment, the test components include a heating component and an impact component; The impact assembly includes a sliding frame 19 slidably mounted between the partition 18 and the base 1, with an opening at the top of the sliding frame 19. A lifting plate 20 is vertically slidably mounted on the inner wall of the sliding frame 19, and multiple sets of swing rods 21 are rotatably connected between the lifting plate 20 and the partition 18. A central channel 24 is provided in the center of the swing rod 21, and a connecting hole 25 is provided on the outer wall of both the lifting plate 20 and the partition 18. When the swing rod 21 is rotated to a vertical state, the central channel 24 is connected to the two connecting holes 25. The impact assembly also includes an electric cylinder for driving the sliding frame 19 to slide. The heating element includes a heating part 26 mounted on the top of the partition 18 and at the bottom of the sliding frame 19.

[0024] The test components are divided into two parts: a heat-generating component and an impact component. (See attached image.) Figure 8 First, the heating element 26 heats up, raising the temperature of the space below the insulation sheet 8 and the sliding frame 19. At this time, since the swing rod 21 is in an inclined state, the two spaces are separated. After the temperature reaches the predetermined time, the sliding frame 19 slides under the drive of the electric cylinder. The lifting plate 20 slides down while driving the swing rod 21 to rotate, compressing the high-temperature gas in the sliding frame 19 to form a high-temperature and high-pressure state. When the swing rod 21 rotates to a vertical state, the central channel 24 in the swing rod 21 connects with the two connecting holes 25, connecting the upper and lower spaces. At the same time, the high-temperature and high-pressure gas in the sliding frame 19 will burst upward through the central channel 24 and cause airflow impact on the insulation sheet 8 to simulate the situation of cell bursting. Moreover, as the high-temperature and high-pressure airflow is filled in, the temperature and pressure in the space below the insulation sheet 8 will also rise to reach the second stage. It is worth mentioning that there are multiple sets of swing rods 21, which can make the impact of airflow on the insulation sheet 8 less regular and uniform, making the impact on the insulation sheet 8 closer to the actual situation, thereby making the test results more accurate.

[0025] In one preferred embodiment, the opposing surfaces of the partition 18 and the lifting plate 20 are each fitted with a block 22, both ends of the swing rod 21 are set as rotating ends 23, and the central channel 24 passes through the center of the two rotating ends 23 respectively. The interior of the two blocks 22 is provided with a circular groove for the rotating ends 23 to be rotatably installed, and the circular groove is provided with a central hole communicating with the connecting hole 25.

[0026] For details, please refer to [link / reference]. Figure 8 The enlarged view shows that the arrangement of the rotating end 23 and the insert 22 facilitates the installation of the swing arm 21, providing a more stable rotation of the swing arm 21, while ensuring that the connecting hole 25 and the central channel 24 are misaligned when tilted.

[0027] In the above implementation, the first two stages of the battery cell were simulated. In this embodiment, the third stage of combustion was also simulated, as detailed below. A spray gun head 31 is also installed on the top of the partition 18, and the spray gun head 31 has an ignition structure. The spray gun head 31 is connected to a vent pipe 30 for supplying fuel to it. A switch assembly 29 for controlling the vent pipe 30 is installed on the outer wall of the simulation box 6, and the trigger end of the switch assembly 29 is located inside the simulation box 6. A touch head 28 is fixed on the outer wall of the sliding frame 19. When the touch head 28 contacts the trigger end of the switch assembly 29, the switch assembly 29 controls the vent pipe 30 to open and controls the ignition structure of the spray gun head 31 to ignite.

[0028] See Figure 5-6 After the above-mentioned bursting stage ends, that is, after the high temperature and high pressure gas in the sliding frame 19 is released, the electric cylinder continues to drive the sliding frame 19 to move. The swing rod 21 will return to tilt after passing the vertical state under the drive of the lifting plate 20. The tilt of the swing rod 21 will cause the space under the sliding frame 19 and the heat insulation sheet 8 to be re-separated. When the touch head 28 contacts the trigger end of the switch assembly 29, the switch assembly 29 controls the vent pipe 30 to open and simultaneously controls the ignition structure of the spray gun head 31 to ignite, so that the spray gun head 31 sprays flames to burn the heat insulation sheet 8, thereby simulating the third stage of battery thermal runaway.

[0029] It is worth mentioning that the ignition and flame of the spray gun head 31 will heat up the space under the heat insulation sheet 8 again. At the same time, the explosion of the flame will make the environment of the heat insulation sheet 8 closer to the situation of battery cell explosion. In addition, the oxygen in the space is sufficient to maintain the flame sprayed by the spray gun head 31 during the test.

[0030] In one preferred embodiment, a top plate 2 is fixed above the base 1 by a support rod. A mounting box 3 is fixed to the bottom of the top plate 2, and a guide rod 4 is fixed to the top of the upper cover 5. A limiting hole for sliding the guide rod 4 is opened at the bottom of the mounting box 3. An adjustment component for driving the upper cover 5 to move up and down and for limiting its position is also installed inside the mounting box 3.

[0031] See Figure 1-2 The upper pressure cover 5 is adjusted and limited by adjusting the components to press the heat insulation sheet 8 during the testing process. At the same time, the guide rod 4 can initiate the sliding limit and guide function of the upper pressure cover 5.

[0032] In one preferred embodiment, the adjustment assembly includes a connecting rod 11 rotatably connected to the top of the upper pressure cover 5. The bottom of the mounting box 3 is provided with a cavity 9. An elastic telescopic rod 10 is rotatably connected to the top of the cavity 9. The telescopic end of the elastic telescopic rod 10 is rotatably connected to the connecting rod 11 through a pin 14. The outer wall of the mounting box 3 is provided with a groove 12 communicating with the cavity 9. A slider 13 is horizontally slidably installed in the groove 12. The outer wall of the slider 13 is provided with a handle, and the pin 14 is rotatably installed on the slider 13. When the elastic telescopic rod 10 and the connecting rod 11 are rotated to a vertical state and are in the same straight line, the slider 13 slides to the end of one side of the groove 12. The adjustment assembly also includes an imbalance structure, which is used to disrupt the straight-line state of the elastic telescopic rod 10 and the connecting rod 11.

[0033] The adjustment components can be seen here. Figure 4-5 The handle can drive the slider 13 to slide in the groove 12, and the pin 14 can drive the elastic telescopic rod 10 and the connecting rod 11 to rotate. The rotation of the connecting rod 11 will drive the upper pressure cover 5 to move up and down, so as to fix the heat insulation sheet 8. When the elastic telescopic rod 10 and the connecting rod 11 rotate to the same straight line, the elastic telescopic rod 10 is compressed to its maximum, and the slider 13 slides to the end of one side of the groove 12, as shown. Figure 5 As shown, without the action of external force, the elastic telescopic rod 10 and the connecting rod 11 will remain stationary, thereby achieving the purpose of limiting the upper pressure cover 5.

[0034] During the second and third stages, namely the explosion and combustion stages, the high-temperature and high-pressure airflow impact will damage the heat insulation sheet 8, and the combustion of the flame may also damage the heat insulation sheet 8. Therefore, when the heat insulation sheet 8 is damaged, the high-temperature and high-pressure air will enter the space above the heat insulation sheet 8. At this time, the temperature detected by the first thermocouple 17 will rise sharply, indicating that the heat insulation sheet 8 has lost its heat insulation effect. Under the action of the unbalanced structure, the straight line state of the elastic telescopic rod 10 and the connecting rod 11 is broken. Thus, under the release of the elastic force of the elastic telescopic rod 10, the slider 13 will slide in the slide groove 12, and the connecting rod 11 will also rotate, causing the upper pressure cover 5 to move up and open, so as to dissipate heat from the internal space in time and end the detection process.

[0035] In one preferred embodiment, the imbalance structure includes an electromagnet 15 installed on the inner wall of one side of the slide 12, and the electromagnet 15 is electrically connected to the first thermocouple 17. The slider 13 is fixed with an iron plate 16 facing the outer wall of the electromagnet 15. When the electromagnet 15 is energized, it applies a magnetic attraction force to the iron plate 16. The imbalance structure also includes an internal air passage 32 located inside the mounting box 3 and away from the electromagnet 15. The internal air passage 32 is connected to the slide 12 and is connected to the inside of the upper pressure cover 5 through a connecting pipe 33. When the slider 13 is located at the end of one side of the slide 12, the slider 13 closes the outlet of the internal air passage 32.

[0036] The unbalanced structure is divided into two parts, corresponding to the second and third stages respectively. In the second stage of the bursting stage, if the impact of high temperature and high pressure gas causes a destructive impact on the heat insulation sheet 8, the high temperature and high pressure gas will enter the space above the heat insulation sheet 8 and increase the air pressure in the space above. The high pressure gas will enter the inner air channel 32 and apply a horizontal impact force to the slider 13 to achieve the disruption of the straight line state between the elastic telescopic rod 10 and the connecting rod 11. This corresponds to the second stage. The three-stage combustion may cause devastating damage to the heat insulation sheet 8. It may also be that the heat insulation performance of the heat insulation sheet 8 is insufficient, which may cause the first thermocouple 17 to detect that the temperature exceeds the preset value. At this time, the first thermocouple 17 will control the electromagnet 15 to be energized through the electrical connection and apply magnetic attraction to the iron sheet 16, thereby achieving the above purpose. These two methods correspond to the situations caused by destructive damage and insufficient thermal insulation performance of the thermal insulation sheet 8, respectively. Furthermore, the imbalance triggering method can also intuitively determine whether the performance of the thermal insulation sheet 8 is insufficient in impact resistance or insufficient in thermal insulation performance, and also plays a role in testing the impact resistance performance of the thermal insulation sheet 8 under actual use conditions.

[0037] In one preferred embodiment, a first thermocouple 17 is disposed at the center of the upper cover 5, and a second thermocouple 27 is also installed on the edge portion of the upper cover 5, and the second thermocouple 27 monitors the edge portion of the heat insulation sheet 8.

[0038] For details, please refer to [link / reference]. Figure 8 By comparing the test results from multiple parts, the test results can be made more accurate and objective.

[0039] In one preferred embodiment, the outer wall of the sliding frame 19 is provided with a vent that can be opened or closed.

[0040] The vent hole facilitates the balancing of air pressure within the sliding frame 19 for future testing.

[0041] In one preferred embodiment, the mating surfaces of the upper cover 5 and the simulation box 6 are both provided with skirts 7.

[0042] By setting the skirt 7, the contact area with the heat insulation sheet 8 can be further increased, resulting in a better compression effect and thus a better sealing effect after clamping.

[0043] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for thermal insulation and protection materials of power batteries, comprising a base (1), characterized in that, Also includes: The simulation box (6) is fixed on the base (1), the top of the simulation box (6) is open, and the inner wall is fixed with a partition (18). An upper pressure cover (5) is set above the simulation box (6) and can move up and down. The upper pressure cover (5) and the simulation box (6) are used to clamp and fix the heat insulation sheet (8), and the heat insulation sheet (8) forms two sealed spaces at the top and bottom. A first thermocouple (17) is installed inside the upper pressure cover (5) to monitor the top temperature of the insulation sheet (8). The test component first heats the space above the partition (18) to simulate the heating stage of the battery cell. After a predetermined time, it releases a high-temperature and high-pressure airflow to the partition (18) to simulate the bursting stage of the battery cell. The temperature monitoring of the first thermocouple (17) is used to detect the change in the heat insulation performance of the heat insulation sheet (8). The test components include a heating component and an impact component; The impact assembly includes a sliding frame (19) slidably installed between the partition (18) and the base (1), and the top of the sliding frame (19) is provided with an opening. A lifting plate (20) is vertically slidably installed on the inner wall of the sliding frame (19), and multiple sets of swing rods (21) are rotatably connected between the lifting plate (20) and the partition (18). A central channel (24) is provided in the center of the swing rod (21), and a connecting hole (25) is provided on the outer wall of both the lifting plate (20) and the partition (18). When the swing rod (21) is rotated to a vertical state, the central channel (24) is connected to the two connecting holes (25). The impact assembly also includes an electric cylinder for driving the sliding frame (19) to slide. The heating component includes a heating part (26) installed on the top of the partition (18) and at the bottom of the sliding frame (19). The partition (18) and the lifting plate (20) are each fitted with a block (22), and both ends of the swing rod (21) are set as rotating ends (23). The central channel (24) passes through the center of the two rotating ends (23) respectively. The interior of the two blocks (22) is provided with a circular groove for the rotating end (23) to be rotatably installed, and the circular groove is provided with an intermediate hole that communicates with the connecting hole (25). The top of the partition (18) is also equipped with a spray gun head (31), and the spray gun head (31) has an ignition structure. The spray gun head (31) is connected to a vent pipe (30) for supplying fuel to it. The outer wall of the simulation box (6) is equipped with a switch assembly (29) for controlling the vent pipe (30) switch. The trigger end of the switch assembly (29) is located inside the simulation box (6). The outer wall of the sliding frame (19) is fixed with a touch head (28). When the touch head (28) contacts the trigger end of the switch assembly (29), the switch assembly (29) controls the vent pipe (30) to open and controls the ignition structure of the spray gun head (31) to ignite.

2. The testing equipment for power battery thermal insulation and protection materials according to claim 1, characterized in that: It also includes a top plate (2) fixed above the base (1) by a support rod. The bottom of the top plate (2) is fixed with a mounting box (3). The top of the upper cover (5) is fixed with a guide rod (4). The bottom of the mounting box (3) is provided with a limiting hole for the guide rod (4) to slide. The inside of the mounting box (3) is also equipped with an adjustment component for driving the upper cover (5) to move up and down and for limiting its position.

3. The testing equipment for power battery thermal insulation and protection materials according to claim 2, characterized in that: The adjustment assembly includes a connecting rod (11) rotatably connected to the top of the upper cover (5). The bottom of the mounting box (3) is provided with a cavity (9). An elastic telescopic rod (10) is rotatably connected to the top of the cavity (9). The telescopic end of the elastic telescopic rod (10) is rotatably connected to the connecting rod (11) through a pin (14). The outer wall of the mounting box (3) is provided with a sliding groove (12) communicating with the cavity (9). A slider (13) is horizontally slidably installed in the sliding groove (12). The outer wall of the slider (13) is provided with a handle. The pin (14) is rotatably installed on the slider (13). When the elastic telescopic rod (10) and the connecting rod (11) rotate to a vertical state and are in the same straight line, the slider (13) slides to the end of one side of the sliding groove (12). The adjustment assembly also includes an imbalance structure, which is used to disrupt the straight-line state of the elastic telescopic rod (10) and the connecting rod (11).

4. The testing equipment for power battery thermal insulation and protection materials according to claim 3, characterized in that: The imbalance structure includes an electromagnet (15) installed on the inner wall of one side of the slide (12), and the electromagnet (15) is electrically connected to the first thermocouple (17). The slider (13) has an iron plate (16) fixed on the outer wall of the electromagnet (15). When the electromagnet (15) is energized, it applies a magnetic attraction force to the iron plate (16). The imbalance structure also includes an internal air passage (32) located inside the mounting box (3) and away from the electromagnet (15). The internal air passage (32) is connected to the slide groove (12) and is connected to the inside of the upper pressure cover (5) through a connecting pipe (33). When the slider (13) is located at the end of one side of the slide groove (12), the slider (13) closes the outlet of the internal air passage (32).

5. The testing equipment for power battery thermal insulation and protection materials according to claim 1, characterized in that: The first thermocouple (17) is located at the center of the upper cover (5), and a second thermocouple (27) is also installed on the edge of the upper cover (5), and the second thermocouple (27) monitors the edge of the heat insulation sheet (8).

6. The testing equipment for power battery thermal insulation and protection materials according to claim 1, characterized in that: The outer wall of the sliding frame (19) is provided with a vent that can be opened or closed.

7. The testing equipment for power battery thermal insulation and protection materials according to any one of claims 1-6, characterized in that: Both the upper cover (5) and the simulation box (6) have skirts (7) on their mating surfaces.

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