Lithium ion battery thermal runaway gas production testing device

Abstract

The invention relates to the technical field of thermal runaway of batteries, in particular to a thermal runaway gas production testing device for a lithium ion battery, and solves the problems that three triggering operations of puncturing, overcharging and overheating cannot be realized during thermal runaway testing of the lithium battery in the prior art, the generated heat is inconvenient to effectively isolate, and the testing efficiency is high. And smoke generated by the battery in different time periods is inconvenient to sample and detect, and the like. The lithium ion battery thermal runaway gas production testing device comprises a gas sampling mounting mechanism, a battery clamping mechanism and a state monitoring mechanism, a puncture driving mechanism is mounted at one end of the gas sampling mounting mechanism, and a circulating thermal insulation mechanism is mounted on the inner side of the upper end of the gas sampling mounting mechanism; and a battery clamping mechanism is mounted between the circulating thermal insulation mechanism and the puncture driving mechanism. The battery is subjected to multiple isolation, and smoke generated by the battery in different time periods can be conveniently sampled and detected.

Description

Technical Field

[0001] The invention relates to the technical field of battery thermal runaway, and in particular to a lithium-ion battery thermal runaway gas production testing device. Background Art

[0002] As the core component of the energy storage system-level unit, the safety of lithium-ion batteries has become a fatal hidden danger that restricts the comprehensive development of the energy storage industry, especially the common safety problem of thermal runaway, which needs to be solved urgently. In the process of triggering thermal runaway of lithium-ion batteries, a series of chemical reactions will occur between the positive electrode materials, negative electrode materials, and electrolytes inside the battery, releasing a large amount of flammable and explosive gases. Once mixed with air, they will explode when encountering ignition sources such as electric sparks and open flames, which greatly threatens people's lives and property. Therefore, it is very important to conduct qualitative and quantitative analysis of the gas production of lithium-ion batteries during thermal runaway, and propose development strategies for explosion suppression and high-safety batteries for energy storage systems based on the test results.

[0003] However, the existing thermal runaway test for lithium batteries cannot realize the three triggering operations of puncture, overcharging and overheating, which is not convenient for effectively isolating the generated heat and sampling and testing the smoke generated by the battery in different time periods; therefore, it does not meet the existing needs. We propose a lithium-ion battery thermal runaway gas production test device. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium-ion battery thermal runaway gas production test device to solve the problems raised in the above background technology that the existing thermal runaway test of lithium batteries cannot realize the three trigger operations of puncture, overcharging and overheating, it is not convenient to effectively isolate the generated heat, and it is not convenient to sample and detect the smoke generated by the battery in different time periods.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A lithium-ion battery thermal runaway gas production test device, comprising a gas sampling installation mechanism, a battery clamping mechanism and a state monitoring mechanism, wherein a puncture drive mechanism is installed at one end of the gas sampling installation mechanism, a circulating thermal insulation mechanism is installed on the inner side of the upper end of the gas sampling installation mechanism, a battery clamping mechanism is installed between the circulating thermal insulation mechanism and the puncture drive mechanism, and multiple state monitoring mechanisms are installed at both ends of the battery clamping mechanism, the gas sampling installation mechanism comprises a supporting frame, a protective outer tank is fixedly installed on the upper end surface of the supporting frame, a thermal insulation tube is fixedly installed in the middle of one end of the protective outer tank, and multiple gas sampling tanks are fixedly installed on one side of the thermal insulation tube;

[0007] The battery clamping mechanism includes two isolation inner tanks, the interior of which is fixedly provided with a thermal insulation layer, the ends of the two isolation inner tanks that are close to each other are fixedly provided with a positioning ring, the ends of the isolation inner tanks that are away from the positioning ring are fixedly provided with a breathable seat, the inner sides of the isolation inner tanks are fixedly provided with a support guide ring, both sides of the support guide rings are fixedly provided with a pressure ring, the inner sides of the support guide rings are rotatably connected with an annular clamping frame, a plurality of guide balls are provided between the support guide ring and the annular clamping frame, an adjusting slide is fixedly provided at the middle part of one of the annular clamping frames, the inner side of the middle part of the adjusting slide is slidably connected with a puncture support seat, and a locking knob is provided at one end of the puncture support seat.

[0008] Preferably, the gas sampling installation mechanism also includes an exhaust pipe fixedly connected to the insulation tube, a solenoid valve is fixedly installed on the inner side of one end of the gas sampling tank, a temperature sensor and a gas sensor are installed on the inner side of the other end of the gas sampling tank, and a drain plate is fixedly installed on the inner side of the bottom end of the protective outer tank.

[0009] Preferably, the status monitoring mechanism includes a thermal insulation sleeve, a plurality of heat-insulating glasses are fixedly installed on the inner side of one end of the thermal insulation sleeve, a contact seat is fixedly installed on the inner side of the other end of the thermal insulation sleeve, the thermal insulation sleeve and the contact seat are connected via a sealing ring, a camera is fixedly installed in the middle of one side of the contact seat, a plurality of fill lights are installed on the outer side of the camera, the camera is electrically connected to the plurality of fill lights, and the plurality of fill lights are arranged in a circle relative to the axis of the camera.

[0010] Preferably, the puncture drive mechanism includes a guide slide, a transmission motor is fixedly mounted on one end of the guide slide, a transmission slide is slidably connected to the upper end surface of the guide slide, a tank sealing cover is fixedly mounted on one end of the transmission slide, a transmission screw is mounted on the inner side of the middle part of the transmission slide, a mounting frame is fixedly mounted on the upper end surface of the transmission slide, a hydraulic cylinder is fixedly mounted on the inner side of the upper end of the mounting frame, and a puncture rod is fixedly mounted on the output end of the hydraulic cylinder.

[0011] Preferably, the circulating temperature insulation mechanism includes a coolant storage tank, an injection pipe is provided at the upper end of the coolant storage tank, a return pipe is fixedly installed at the bottom end of the coolant storage tank, two shunt pipes are fixedly installed on one side of the coolant storage tank, and a plurality of spray heads are fixedly provided on the lower end face of each shunt pipe. The injection pipe and the return pipe are through-connected through the coolant storage tank, a one-way valve is provided on the inner side of the return pipe, the coolant storage tank is through-connected with the two shunt pipes, and the interior of the coolant storage tank is filled with coolant.

[0012] Preferably, the bottom end of the exhaust pipe passes through the insulation tube, the supporting frame and the coolant storage tank and is fixedly connected to one of the breathable seats, one end of the puncture rod passes through the tank body sealing cover and the other breathable seat and is plugged into the inner side of the two isolation inner tanks, and the puncture rod is slidably connected to the tank body sealing cover.

[0013] Preferably, the plurality of gas sampling tanks are connected to the inner sides of the two isolated inner tanks through exhaust pipes, the temperature sensor and the gas sensor are both connected to the gas sampling tanks through threads, and the solenoid valve, temperature sensor and gas sensor are electrically connected.

[0014] Preferably, a slide groove is provided on the upper end surface of the guide slide, the bottom end of the transmission slide is inserted into the inner side of the slide groove, one end of the transmission screw passes through the guide slide and is threadedly connected to the transmission slide, and the output end of the transmission motor is connected to the transmission screw through a coupling.

[0015] Preferably, the support guide ring is connected to the annular clamping frame via a plurality of guide balls, and an electric thermal resistance wire is provided inside the annular clamping frame, and the electric thermal resistance wire is arranged in a spiral shape relative to the axis of the annular clamping frame.

[0016] Preferably, a guide groove is provided on the inner side of the adjusting slide, the puncture support seat is arranged on the inner side of the guide groove, and an anti-slip pattern is provided on the side of the puncture support seat close to the puncture rod, one end of the locking knob passes through the puncture support seat and is in close contact with one side of the adjusting slide, and the locking knob is connected to the puncture support seat by a thread.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention linearly slides the puncture support seat on the inner side of the adjustment slide plate and rotates one of the annular clamping frames relative to the support guide ring through the guide ball, so as to adjust the position of the puncture support seat relative to the annular clamping frame, and rotates the other annular clamping frame relative to the support guide ring through the guide ball, so as to meet the requirements of puncturing different parts of the battery. The transmission slide synchronously drives the tank body sealing cover and the puncture rod to move and seal one end of the protective outer tank through the mounting frame and the hydraulic cylinder. The hydraulic cylinder realizes stable puncture of the battery through the puncture rod. After replacing the battery, the battery is heated by the electric heating resistance wire inside the annular clamping frame. After replacing the battery again, the battery is overcharged, so as to realize three thermal runaway triggering modes of battery heating, overcharging and puncturing.

[0019] 2. The present invention can extract the smoke generated in different time periods to the inner side of the gas sampling tank by opening multiple solenoid valves from bottom to top in sequence, and monitor the temperature and composition of the smoke through temperature sensors and gas sensors at the same time, so as to realize sampling and detection operations on the smoke generated by the battery in different time periods. The battery thermal runaway can be effectively protected by the isolation inner tank and the protection outer tank. At the same time, the two shunt pipes extract the coolant inside the coolant storage tank and spray it synchronously through multiple spray heads, thereby avoiding the leakage of smoke in the isolation inner tank and reducing the insulation pressure of the isolation inner tank. After multiple insulating glasses are subjected to multi-layer insulation treatment, the camera can record the entire picture of the battery thermal runaway from multiple angles and provide fill-in light through multiple fill-in lights. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A rear side view of the present invention as a whole;

[0022] Figure 3 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of the A area in the middle;

[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the supporting chassis of the present invention;

[0026] Figure 7 It is a schematic diagram of the installation structure of the annular clamping frame of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the circulating temperature insulation mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 Schematic diagram of the cross-sectional structure of the middle C area.

[0029] In the figure: 1. Gas sampling installation mechanism; 101. Support chassis; 102. Protective outer tank; 103. Insulation tube; 104. Gas sampling tank; 105. Exhaust pipe; 106. Solenoid valve; 107. Temperature sensor; 108. Gas sensor; 109. Drain plate; 2. Piercing drive mechanism; 201. Guide slide; 202. Transmission motor; 203. Transmission screw; 204. Transmission slide; 205. Mounting frame; 206. Tank sealing cover; 207. Hydraulic cylinder; 208. Piercing rod; 3. Circulating insulation mechanism; 301. Coolant storage tank; 302. 02. Reflux pipe; 303. Diverter pipe; 304. Sprinkler head; 305. Liquid injection pipe; 4. Battery clamping mechanism; 401. Isolation inner tank; 402. Breathable seat; 403. Positioning ring; 404. Insulation layer; 405. Ring clamping frame; 406. Support guide ring; 407. Pressing ring; 408. Guide ball; 409. Piercing support seat; 410. Adjusting slide plate; 411. Locking knob; 5. Status monitoring mechanism; 501. Insulation sleeve; 502. Insulation glass; 503. Sealing ring; 504. Contact seat; 505. Camera; 506. Fill light. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] The transmission motor 202 (model GV50-3.7KW-60-S) and the hydraulic cylinder 207 (model HOB80X250-100) mentioned in the present invention can be purchased from the market or obtained through private customization.

[0032] See also Figures 1 to 4 , an embodiment of the present invention: a lithium-ion battery thermal runaway gas production test device, comprising a gas sampling installation mechanism 1, a battery clamping mechanism 4 and a state monitoring mechanism 5, the gas sampling installation mechanism 1 comprises a supporting frame 101, a protective outer tank 102 is fixedly installed on the upper end surface of the supporting frame 101, a drain plate 109 is fixedly installed on the inner side of the bottom end of the protective outer tank 102, a heat-insulating tube 103 is fixedly installed in the middle of one end of the protective outer tank 102, and a plurality of gas sampling tanks 104 are fixedly installed on one side of the heat-insulating tube 103, and the flue gas generated in different time periods can be extracted only to the inner side of the gas sampling tank 104 by opening a plurality of solenoid valves 106 from bottom to top in sequence, so as to realize sampling of the flue gas generated by the battery in different time periods;

[0033] An exhaust pipe 105 is fixedly connected to the inner side of the insulation tube 103, a solenoid valve 106 is fixedly installed on the inner side of one end of the gas sampling tank 104, a temperature sensor 107 and a gas sensor 108 are installed on the inner side of the other end of the gas sampling tank 104, the temperature sensor 107 and the gas sensor 108 are both connected to the gas sampling tank 104 by threads, the solenoid valve 106, the temperature sensor 107 and the gas sensor 108 are electrically connected, and the temperature and composition of the flue gas are monitored by the temperature sensor 107 and the gas sensor 108.

[0034] See also Figure 2 and Figure 3 A puncture drive mechanism 2 is installed at one end of the gas sampling installation mechanism 1, and the puncture drive mechanism 2 includes a guide slide 201, a transmission motor 202 is fixedly installed at one end of the guide slide 201, a transmission slide 204 is slidably connected to the upper end surface of the guide slide 201, a tank body sealing cover 206 is fixedly installed at one end of the transmission slide 204, a transmission screw 203 is installed on the inner side of the middle part of the transmission slide 204, and a mounting frame 205 is fixedly installed on the upper end surface of the transmission slide 204, so that the transmission motor 202 drives the transmission slide 204 to move horizontally under the guidance of the guide slide 201 through the transmission screw 203, and then the transmission slide 204 drives the tank body sealing cover 206 and the puncture rod 208 to move synchronously through the mounting frame 205 and the hydraulic cylinder 207;

[0035] A hydraulic cylinder 207 is fixedly installed on the inner side of the upper end of the mounting frame 205, and a puncture rod 208 is fixedly installed on the output end of the hydraulic cylinder 207. A slide groove is provided on the upper end surface of the guide slide 201, and the bottom end of the transmission slide 204 is inserted into the inner side of the slide groove. One end of the transmission screw 203 passes through the guide slide 201 and is connected to the transmission slide 204 by a thread. The output end of the transmission motor 202 is connected to the transmission screw 203 by a coupling, so that the hydraulic cylinder 207 can stably puncture the battery through the puncture rod 208 under the support of the mounting frame 205.

[0036] See also Figure 3 and Figure 8A circulating insulation mechanism 3 is installed on the inner side of the upper end of the gas sampling installation mechanism 1, and the circulating insulation mechanism 3 includes a coolant storage tank 301, an injection pipe 305 is provided on the upper end of the coolant storage tank 301, and a return pipe 302 is fixedly installed at the bottom end of the coolant storage tank 301. Two shunt pipes 303 are fixedly installed on one side of the coolant storage tank 301, and a plurality of spray heads 304 are fixedly provided on the lower end surface of each shunt pipe 303. The injection pipe 305 is connected with the return pipe 302 through the coolant storage tank 301, and a one-way valve is provided on the inner side of the return pipe 302. The coolant storage tank 301 is filled with coolant, and the two shunt pipes 303 extract the coolant inside the coolant storage tank 301 and spray it synchronously through the plurality of spray heads 304, thereby avoiding the leakage of smoke in the isolation inner tank 401 and reducing the insulation pressure of the isolation inner tank 401.

[0037] See also Figures 3 to 7 A battery clamping mechanism 4 is installed between the circulating insulation mechanism 3 and the puncture drive mechanism 2. The battery clamping mechanism 4 includes two isolation inner tanks 401. A plurality of gas sampling tanks 104 are connected to the inner sides of the two isolation inner tanks 401 through exhaust pipes 105. The interior of the isolation inner tanks 401 is fixedly provided with an insulation layer 404. The ends of the two isolation inner tanks 401 that are close to each other are fixedly provided with a positioning ring 403. The ends of the isolation inner tanks 401 that are away from the positioning ring 403 are fixedly provided with a ventilating seat. 402, the bottom end of the exhaust pipe 105 passes through the insulation tube 103, the support frame 101 and the coolant storage tank 301 and is fixedly connected to one of the air-permeable seats 402, one end of the puncture rod 208 passes through the tank body sealing cover 206 and the other air-permeable seat 402 and is plugged into the inner side of the two isolated inner tanks 401, and the puncture rod 208 is slidably connected to the tank body sealing cover 206, so that the battery can be stably clamped by the two annular clamping frames 405 through the puncture rod 208 to achieve puncture operation;

[0038] A support guide ring 406 is fixedly installed on the inner side of the isolation inner tank 401, and pressure rings 407 are fixedly installed on both sides of the support guide ring 406. An annular clamping frame 405 is rotatably connected to the inner side of the support guide ring 406. A plurality of guide balls 408 are arranged between the support guide ring 406 and the annular clamping frame 405. The support guide ring 406 and the annular clamping frame 405 are connected through the plurality of guide balls 408. An electric thermal resistance wire is arranged inside the annular clamping frame 405. The electric thermal resistance wire is spirally arranged relative to the axis of the annular clamping frame 405. The battery is heated by the electric thermal resistance wire to trigger battery overheating.

[0039] An adjusting slide 410 is fixedly installed in the middle of one of the annular clamping frames 405, and a puncture support seat 409 is slidably connected to the inner side of the middle of the adjusting slide 410, and a locking knob 411 is installed at one end of the puncture support seat 409. A guide groove is provided on the inner side of the adjusting slide 410, and the puncture support seat 409 is arranged on the inner side of the guide groove. The side of the puncture support seat 409 close to the puncture rod 208 is provided with anti-slip grooves, and one end of the locking knob 411 penetrates the puncture support seat 409 and is in contact with one side of the adjusting slide 410. The locking knob 411 is connected to the puncture support seat 409 by threads, and the puncture support seat 409 slides linearly on the inner side of the adjusting slide 410 and rotates one of the annular clamping frames 405 relative to the support guide ring 406 through the guide ball 408, so as to adjust the position of the puncture support seat 409 relative to the annular clamping frame 405.

[0040] See also Figure 3 , Figure 8 and Fig. 9 A plurality of status monitoring mechanisms 5 are installed at both ends of the battery clamping mechanism 4, and the status monitoring mechanism 5 includes a thermal insulation sleeve 501, a plurality of heat-insulating glasses 502 are fixedly installed on the inner side of one end of the thermal insulation sleeve 501, a contact seat 504 is fixedly installed on the inner side of the other end of the thermal insulation sleeve 501, the thermal insulation sleeve 501 is connected to the contact seat 504 through a sealing ring 503, a camera 505 is fixedly installed in the middle of one side of the contact seat 504, a plurality of fill-in lights 506 are installed on the outer side of the camera 505, the camera 505 is electrically connected to the plurality of fill-in lights 506, and the plurality of fill-in lights 506 are arranged in a circle relative to the axis of the camera 505, so that after the plurality of heat-insulating glasses 502 are subjected to multi-layer heat insulation treatment, the camera 505 can record the entire picture of battery thermal runaway from multiple angles and provide fill-in light through the plurality of fill-in lights 506.

[0041] In summary, when testing the battery, the battery is fixedly mounted on the annular clamping frame 405 close to the puncture rod 208, and the puncture support seat 409 is adjusted according to the puncture position, specifically, one end of the locking knob 411 passes through the puncture support seat 409 and is in close contact with one side of the adjustment slide 410, and the locking knob 411 is threadedly connected to the puncture support seat 409, so that the puncture support seat 409 slides linearly on the inner side of the adjustment slide 410 and one of the annular clamping frames 405 is rotated relative to the support guide ring 406 through the guide ball 408, so as to adjust the position of the puncture support seat 409 relative to the annular clamping frame 405, and the puncture support seat 409 is locked and fixed by the locking knob 411, and at the same time, the other annular clamping frame 405 is rotated relative to the support guide ring 406 through the guide ball 408, so as to meet the puncture operation of different parts of the battery;

[0042] After the battery is installed, the two annular clamping frames 405 and the two isolation inner tanks 401 are fixed and the battery is connected to electricity. The power is turned on and the transmission motor 202 is started, so that the transmission motor 202 drives the transmission slide 204 to move horizontally under the guidance of the guide slide 201 through the transmission screw 203 under the support of the support base 101, and then the transmission slide 204 drives the tank body sealing cover 206 and the puncture rod 208 to move synchronously through the mounting frame 205 and the hydraulic cylinder 207 and seal one end of the protective outer tank 102. At this time, the two annular clamping frames 405 can stably clamp the battery and provide fixed-point support through the puncture support seat 409.

[0043] The hydraulic cylinder 207 is started, so that the hydraulic cylinder 207 can stably puncture the battery through the puncture rod 208 under the support of the mounting frame 205. After the battery is replaced, the battery is heated by the electric thermal resistance wire inside the annular clamping frame 405. After the battery is replaced again, the battery is overcharged, thereby realizing the three thermal runaway triggers of battery heating, overcharging and puncture;

[0044] When thermal runaway occurs in the battery, the smoke generated by the thermal runaway can be extracted through the exhaust pipe 105. A plurality of gas sampling tanks 104 are installed on one side of the insulation tube 103, so that the smoke generated in different time periods can be extracted to the inner side of the gas sampling tank 104 by opening the plurality of solenoid valves 106 from bottom to top in sequence. At the same time, the temperature and composition of the smoke are monitored by the temperature sensor 107 and the gas sensor 108, so as to realize the sampling and detection operation of the smoke generated by the battery in different time periods;

[0045] An insulating layer 404 is provided inside the isolation inner tank 401, so that the battery thermal runaway can be effectively protected through the isolation inner tank 401 and the protective outer tank 102. At the same time, the two shunt pipes 303 extract the coolant inside the coolant storage tank 301 and spray it synchronously through multiple spray heads 304, thereby avoiding the leakage of smoke in the isolation inner tank 401 and reducing the insulation pressure of the isolation inner tank 401. The return pipe 302 can return the coolant after spraying and cooling to the inner side of the coolant storage tank 301 through the drain plate 109, so as to realize the recycling of the coolant. Before and after the battery thermal runaway, the multiple state monitoring mechanisms 5 on the isolation inner tank 401 are used to record the whole process in real time. Multiple insulating glasses 502 are installed at one end of the insulation sleeve 501, so that after the multiple insulating glasses 502 are subjected to multi-layer insulation treatment, the camera 505 can record the whole process of battery thermal runaway from multiple angles and provide fill light through multiple fill lights 506.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A lithium-ion battery thermal runaway gas production test device, comprising a gas sampling installation mechanism (1), a battery clamping mechanism (4) and a state monitoring mechanism (5), characterized in that: A puncture drive mechanism (2) is installed at one end of the gas sampling installation mechanism (1), a circulating heat-insulating mechanism (3) is installed on the inner side of the upper end of the gas sampling installation mechanism (1), a battery clamping mechanism (4) is installed between the circulating heat-insulating mechanism (3) and the puncture drive mechanism (2), and a plurality of state monitoring mechanisms (5) are installed at both ends of the battery clamping mechanism (4), the gas sampling installation mechanism (1) comprises a supporting frame (101), a protective outer tank (102) is fixedly installed on the upper end surface of the supporting frame (101), a heat-insulating tube (103) is fixedly installed in the middle of one end of the protective outer tank (102), and a plurality of gas sampling tanks (104) are fixedly installed on one side of the heat-insulating tube (103); the battery clamping mechanism (4) comprises two isolation inner tanks (401), and a heat-insulating layer (404) is fixedly provided inside the isolation inner tank (401). ), a positioning ring (403) is fixedly installed at one end of the two isolation inner tanks (401) that are close to each other, and a breathable seat (402) is fixedly installed at one end of the isolation inner tank (401) that is away from the positioning ring (403), a support guide ring (406) is fixedly installed on the inner side of the isolation inner tank (401), and pressure rings (407) are fixedly installed on both sides of the support guide ring (406), and an annular clamping frame (405) is rotatably connected to the inner side of the support guide ring (406), and a plurality of guide balls (408) are arranged between the support guide ring (406) and the annular clamping frame (405), and an adjusting slide plate (410) is fixedly installed in the middle of one of the annular clamping frames (405), and a puncture support seat (409) is slidably connected to the inner side of the middle of the adjusting slide plate (410), and a locking knob (411) is installed at one end of the puncture support seat (409).

2. The lithium-ion battery thermal runaway gas generation test device according to claim 1, characterized in that: The gas sampling installation mechanism (1) also includes an exhaust pipe (105) fixedly connected to the insulation tube (103); a solenoid valve (106) is fixedly installed on the inner side of one end of the gas sampling tank (104); a temperature sensor (107) and a gas sensor (108) are installed on the inner side of the other end of the gas sampling tank (104); and a drain plate (109) is fixedly installed on the inner side of the bottom end of the protective outer tank (102).

3. The lithium-ion battery thermal runaway gas generation test device according to claim 2, characterized in that: The state monitoring mechanism (5) comprises a thermal insulation sleeve (501), a plurality of heat-insulating glasses (502) are fixedly mounted on the inner side of one end of the thermal insulation sleeve (501), a contact seat (504) is fixedly mounted on the inner side of the other end of the thermal insulation sleeve (501), the thermal insulation sleeve (501) and the contact seat (504) are connected via a sealing ring (503), a camera (505) is fixedly mounted in the middle of one side of the contact seat (504), a plurality of fill-in lights (506) are mounted on the outer side of the camera (505), the camera (505) and the plurality of fill-in lights (506) are electrically connected, and the plurality of fill-in lights (506) are arranged in a circle relative to the axis of the camera (505).

4. The lithium-ion battery thermal runaway gas generation test device according to claim 3, characterized in that: The puncture drive mechanism (2) comprises a guide slide (201), a transmission motor (202) is fixedly mounted on one end of the guide slide (201), a transmission slide (204) is slidably connected to the upper end surface of the guide slide (201), a tank body sealing cover (206) is fixedly mounted on one end of the transmission slide (204), a transmission screw (203) is mounted on the inner side of the middle part of the transmission slide (204), a mounting frame (205) is fixedly mounted on the upper end surface of the transmission slide (204), a hydraulic cylinder (207) is fixedly mounted on the inner side of the upper end of the mounting frame (205), and a puncture rod (208) is fixedly mounted on the output end of the hydraulic cylinder (207).

5. The lithium-ion battery thermal runaway gas generation test device according to claim 4, characterized in that: The circulating temperature-insulating mechanism (3) comprises a cooling liquid storage tank (301), the upper end of which is provided with a liquid injection pipe (305), the bottom end of which is fixedly provided with a return pipe (302), one side of which is fixedly provided with two shunt pipes (303), the lower end surface of each of which is fixedly provided with a plurality of spray heads (304), the liquid injection pipe (305) and the return pipe (302) are connected through the cooling liquid storage tank (301), a one-way valve is provided on the inner side of the return pipe (302), the cooling liquid storage tank (301) and the two shunt pipes (303) are connected through, and the interior of the cooling liquid storage tank (301) is filled with cooling liquid.

6. The lithium-ion battery thermal runaway gas generation test device according to claim 5, characterized in that: The bottom end of the exhaust pipe (105) passes through the insulation tube (103), the support frame (101) and the coolant storage tank (301) and is fixedly connected to one of the air-permeable seats (402); one end of the puncture rod (208) passes through the tank body sealing cover (206) and the other air-permeable seat (402) and is plugged into the inner side of the two isolated inner tanks (401); the puncture rod (208) is slidably connected to the tank body sealing cover (206).

7. The lithium-ion battery thermal runaway gas generation test device according to claim 6, characterized in that: The plurality of gas sampling tanks (104) are connected to the inner sides of the two isolated inner tanks (401) via exhaust pipes (105); the temperature sensor (107) and the gas sensor (108) are both connected to the gas sampling tanks (104) via threads; and the solenoid valve (106), the temperature sensor (107) and the gas sensor (108) are electrically connected.

8. The lithium-ion battery thermal runaway gas generation test device according to claim 7, characterized in that: The upper end surface of the guide slide (201) is provided with a slide groove, the bottom end of the transmission slide (204) is inserted into the inner side of the slide groove, one end of the transmission screw (203) passes through the guide slide (201) and is connected to the transmission slide (204) by means of a thread, and the output end of the transmission motor (202) is connected to the transmission screw (203) by means of a coupling.

9. The lithium-ion battery thermal runaway gas generation test device according to claim 8, characterized in that: The support guide ring (406) is connected to the annular clamping frame (405) via a plurality of guide balls (408); an electric thermal resistance wire is provided inside the annular clamping frame (405); the electric thermal resistance wire is arranged in a spiral shape relative to the axis of the annular clamping frame (405).

10. The lithium-ion battery thermal runaway gas generation test device according to claim 9, characterized in that: A guide groove is provided on the inner side of the adjusting slide plate (410), and the puncture support seat (409) is arranged on the inner side of the guide groove. The side of the puncture support seat (409) close to the puncture rod (208) is provided with anti-slip grooves, and one end of the locking knob (411) passes through the puncture support seat (409) and is in close contact with one side of the adjusting slide plate (410), and the locking knob (411) is connected to the puncture support seat (409) by threads.

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