Lithium battery thermal runaway simulation device with good safety protection

Abstract

The invention discloses a lithium battery thermal runaway simulation device with good safety protection, and the device comprises a box body, the top of the box body is fixedly provided with a storage groove, the storage groove is internally provided with a clamping groove, the clamping groove is internally provided with a lithium battery, the bottom of the interior of the clamping groove is provided with a heating plate, the interior of the box body is provided with a hydraulic cylinder, and the hydraulic cylinder is connected with the storage groove. A piston rod of the hydraulic cylinder penetrates through the box body and is fixedly provided with a first connecting rod, the first connecting rod is fixedly provided with an anti-explosion glass cover through a second connecting rod, one end of the anti-explosion glass cover is provided with a through hole, a fixing block is fixed to the anti-explosion glass cover, and a baffle used for shielding the through hole is slidably connected into the fixing block in a sleeved mode. The explosion-proof glass cover is provided with a lifting mechanism used for driving the baffle to slidably ascend and descend. The explosion-proof glass cover is used for covering the lithium battery in the experiment process, so that the lithium battery can be isolated from the outside during thermal runaway, damage to the periphery caused by a thermal runaway experiment is avoided, and a good safety protection effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal runaway simulation of lithium batteries, and in particular to a thermal runaway simulation device of lithium batteries with good safety protection. Background Art

[0002] Lithium battery thermal runaway is divided into three stages: self-heating stage, thermal runaway stage, and thermal runaway termination stage. Studying the thermal runaway process of lithium batteries is of great reference significance for the safe use of lithium batteries. However, when lithium batteries are in thermal runaway, they will generate a lot of heat and energy, and there may be gas and liquid splashing, which has a great impact on the experimenter and the experimental environment. In order to better solve this problem, we propose a lithium battery thermal runaway simulation device with good safety protection. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a lithium battery thermal runaway simulation device with good safety protection.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A lithium battery thermal runaway simulation device with good safety protection comprises a box body, a storage slot is fixed on the top of the box body, a card slot is arranged inside the storage slot, a lithium battery is placed in the card slot, a heating plate is installed at the bottom of the card slot, a hydraulic cylinder is installed inside the box body, a piston rod of the hydraulic cylinder passes through the box body and is fixed with a first connecting rod, the first connecting rod is fixed with an explosion-proof glass cover through a second connecting rod, a through hole is opened at one end of the explosion-proof glass cover, a fixed block is fixed on the explosion-proof glass cover, a baffle for shielding the through hole is slidably sleeved in the fixed block, and a lifting mechanism for driving the baffle to slide and lift is installed on the explosion-proof glass cover.

[0006] Preferably, a cavity is provided on the inner wall of the storage groove, an exhaust hole is opened on the inner wall of the storage groove, a sleeve is fixed through the side of the box body, a smoke sensor, a combustible gas sensor, and an exhaust fan are installed in the sleeve, and the sleeve is connected to the cavity through an exhaust pipe.

[0007] Preferably, a reinforcing rod is fixed inside the cavity.

[0008] Preferably, a thermocouple is installed on the side of the lithium battery.

[0009] Preferably, a fire extinguishing agent storage tank is installed inside the box, a liquid pump is installed inside the fire extinguishing agent storage tank, the outlet of the liquid pump is connected to an annular tube through a hose, the annular tube is fixed inside the explosion-proof glass cover, and a nozzle is connected to the annular tube.

[0010] Preferably, the storage tank is connected to a sewage pipe, and the sewage pipe runs through the storage tank and the box body and is installed with a shut-off valve.

[0011] Preferably, the lifting mechanism comprises a motor, a gear and a rack. The motor is mounted on the top of the explosion-proof glass cover. A gear is fixedly sleeved on the output shaft of the motor. The rack is embedded in the baffle, and the gear is meshed with the rack.

[0012] Preferably, a camera is installed on the inner top of the explosion-proof glass cover.

[0013] Preferably, rollers are installed at the four corners of the bottom of the box body, brake pads are provided on the rollers, and a box door is installed on the side of the box body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the present invention, a lithium battery is placed in the card slot, the heating plate heats the lithium battery, the thermocouple is used to detect the temperature change of the lithium battery during the heating process, and the explosion-proof glass cover is used to cover the lithium battery during the experiment, so that the lithium battery can be isolated from the outside when thermal runaway occurs, thereby avoiding damage to the surrounding area caused by the thermal runaway experiment, and having a good safety protection effect. The hydraulic cylinder drives the explosion-proof glass cover to move through the first connecting rod and the second connecting rod, and the through hole slides over the storage slot, so that the storage slot can be moved into or out of the explosion-proof glass cover, and the lifting mechanism drives the baffle to move, so that the through hole can be sealed or opened;

[0016] 2. In the present invention, the exhaust fan extracts air from the storage tank through the sleeve, the exhaust pipe, the cavity, and the exhaust hole. The extracted gas is detected by the smoke sensor and the combustible gas sensor to detect whether there is smoke and combustible gas. The reinforcing rod can enhance the strength of the storage tank and reduce deformation. When extinguishing a fire, the liquid pump extracts the fire extinguishing agent from the fire extinguishing agent storage tank, and then sprays the fire extinguishing agent into the storage tank through the hose, the annular pipe, and the nozzle to extinguish the thermal runaway lithium battery. The shut-off valve is opened, and the waste liquid can be discharged through the drain pipe. The camera shoots the heating process of the lithium battery, which is convenient for retaining materials and facilitating later research. The roller facilitates the box to move to the specified position, and the roller is fixed by the brake pad after reaching the position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a lithium battery thermal runaway simulation device with good safety protection proposed by the present invention;

[0018] Figure 2 A cross-sectional view of a lithium battery thermal runaway simulation device with good safety protection proposed by the present invention;

[0019] Figure 3A cross-sectional view of a storage tank of a lithium battery thermal runaway simulation device with good safety protection proposed by the present invention;

[0020] Figure 4 This is a structural schematic diagram of a lifting mechanism of a lithium battery thermal runaway simulation device with good safety protection proposed by the present invention.

[0021] In the figure: 1 box body, 2 box door, 3 roller, 4 explosion-proof glass cover, 5 lifting mechanism, 51 motor, 52 gear, 53 rack, 6 baffle, 7 first connecting rod, 8 second connecting rod, 9 hose, 10 sleeve, 11 hydraulic cylinder, 12 fire extinguishing agent storage tank, 13 liquid pump, 14 through hole, 15 annular pipe, 16 nozzle, 17 camera, 18 storage slot, 19 lithium battery, 20 fixing block, 21 exhaust fan, 22 reinforcing rod, 23 cavity, 24 exhaust hole, 25 thermocouple, 26 heating plate, 27 exhaust pipe, 28 sewage pipe, 29 shut-off valve, 30 smoke sensor, 31 combustible gas sensor. DETAILED DESCRIPTION

[0022] 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.

[0023] Reference Figure 1 , Figure 2 , Figure 3 A lithium battery thermal runaway simulation device with good safety protection includes a box body 1, a storage slot 18 is fixed on the top of the box body 1, a card slot is arranged inside the storage slot 18, a lithium battery 19 is placed in the card slot, a heating plate 26 is installed at the bottom of the card slot, the heating plate 26 heats the lithium battery 19, a thermocouple 25 is installed on the side of the lithium battery 19, and the thermocouple 25 is used to detect the temperature change of the lithium battery 19 during the heating process, a hydraulic cylinder 11 is installed inside the box body 1, a piston rod of the hydraulic cylinder 11 passes through the box body 1 and is fixed with a first connecting rod 7, the first connecting rod 7 is fixed with an explosion-proof glass cover 4 through a second connecting rod 8, one end of the explosion-proof glass cover 4 is provided with a through hole 14, and the explosion-proof glass cover 4 is fixed with a second connecting rod 8. A fixed block 20 is provided, and a baffle 6 for shielding the through hole 14 is slidably sleeved in the fixed block 20. A lifting mechanism 5 for driving the baffle 6 to slide and lift is installed on the explosion-proof glass cover 4. The explosion-proof glass cover 4 is used to cover the lithium battery 19 during the experiment, so that the lithium battery 19 can be isolated from the outside during thermal runaway, thereby avoiding damage to the surrounding area caused by the thermal runaway experiment, and has a good safety protection effect. The hydraulic cylinder 11 drives the explosion-proof glass cover 4 to move through the first connecting rod 7 and the second connecting rod 8, and the through hole 14 slides over the storage slot 18, so that the storage slot 18 can be moved into or out of the explosion-proof glass cover 4, and the lifting mechanism 5 drives the baffle 6 to move, so that the through hole 14 can be sealed or opened.

[0024] Reference Figure 2 , Figure 3 A cavity 23 is provided on the inner wall of the storage groove 18, and an exhaust hole 24 is opened on the inner wall of the storage groove 18. A sleeve 10 is fixed through the side of the box body 1, and a smoke sensor 30, a combustible gas sensor 31, and an exhaust fan 21 are installed in the sleeve 10. The sleeve 10 is connected with the cavity 23 through an exhaust pipe 27. The exhaust fan 21 extracts air from the storage groove 18 through the sleeve 10, the exhaust pipe 27, the cavity 23, and the exhaust hole 24. The extracted gas is detected by the smoke sensor 30 and the combustible gas sensor 31 to see whether there is smoke and combustible gas. A reinforcing rod 22 is fixed inside the cavity 23. The reinforcing rod 22 can enhance the strength of the storage groove 18 and reduce deformation. A fire extinguishing agent storage tank 12 is installed inside the box body 1, and a liquid pump 13 is installed inside the fire extinguishing agent storage tank 12. The outlet of the liquid pump 13 is connected to the annular pipe 15 through a hose 9. The annular pipe 15 is fixed It is fixed inside the explosion-proof glass cover 4, and the annular tube 15 is connected to a nozzle 16. When extinguishing a fire, the liquid pump 13 extracts the fire extinguishing agent from the fire extinguishing agent storage tank 12, and then sprays the fire extinguishing agent into the storage tank 18 through the hose 9, the annular tube 15, and the nozzle 16, so as to extinguish the lithium battery 19 with thermal runaway. The storage tank 18 is connected to a sewage pipe 28, which runs through the storage tank 18 and the box body 1 and is installed with a shut-off valve 29. When the shut-off valve 29 is opened, the waste liquid can be discharged through the sewage pipe 28. A camera 17 is installed on the top of the interior of the explosion-proof glass cover 4. The camera 17 shoots the heating process of the lithium battery 19, which is convenient for retaining materials and facilitating later research. Rollers 3 are installed at the four corners of the bottom of the box body 1, and brake pads are arranged on the rollers 3. A box door 2 is installed on the side of the box body 1. The rollers 3 facilitate the box body 1 to move to the specified position, and the rollers 3 are fixed by the brake pads after reaching the position.

[0025] Reference Figure 4 The lifting mechanism 5 includes a motor 51, a gear 52, and a rack 53. The motor 51 is installed on the top of the explosion-proof glass cover 4. The gear 52 is fixedly sleeved on the output shaft of the motor 51. The rack 53 is embedded in the baffle 6. The gear 52 is meshed with the rack 53. The motor 51 drives the gear 52 to rotate. The gear 52 drives the rack 53 to rise and fall by meshing with the rack 53, thereby driving the baffle 6 to rise and fall.

[0026] Working principle: When in use, a lithium battery 19 is placed in the card slot, and the heating plate 26 heats the lithium battery 19. The thermocouple 25 is used to detect the temperature change of the lithium battery 19 during the heating process. The explosion-proof glass cover 4 is used to cover the lithium battery 19 during the experiment, so that the lithium battery 19 can be isolated from the outside when thermal runaway occurs, thereby avoiding damage to the surrounding area caused by the thermal runaway experiment, and has a good safety protection effect. The hydraulic cylinder 11 drives the explosion-proof glass cover 4 to move through the first connecting rod 7 and the second connecting rod 8, and the through hole 14 slides over the storage slot 18, so that the storage slot 18 can be moved into or out of the explosion-proof glass cover 4, and the lifting mechanism 5 drives the baffle 6 to move, so that the through hole 14 can be sealed or opened; the exhaust fan 21 passes through the sleeve 10, The exhaust pipe 27, the cavity 23, and the exhaust hole 24 exhaust air from the storage tank 18, and the extracted gas is detected by the smoke sensor 30 and the combustible gas sensor 31 to see if there is smoke and combustible gas. The reinforcing rod 22 can enhance the strength of the storage tank 18 and reduce deformation. When extinguishing a fire, the liquid pump 13 extracts the fire extinguishing agent from the fire extinguishing agent storage tank 12, and then sprays the fire extinguishing agent into the storage tank 18 through the hose 9, the annular tube 15, and the nozzle 16 to extinguish the lithium battery 19 that is in thermal runaway. The shut-off valve 29 is opened, and the waste liquid can be discharged through the drain pipe 28. The camera 17 shoots the heating process of the lithium battery 19 to facilitate the retention of materials and facilitate later research. The roller 3 facilitates the movement of the box 1 to the specified position, and the roller 3 is fixed by the brake pad after reaching the position.

[0027] The operation principle of the lifting mechanism 5 is as follows: the motor 51 drives the gear 52 to rotate, and the gear 52 drives the rack 53 to move up and down by meshing with the rack 53, thereby driving the baffle 6 to move up and down.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery thermal runaway simulation device with good safety protection, comprising a box (1), characterized in that: A storage slot (18) is fixed on the top of the box (1), a card slot is provided inside the storage slot (18), a lithium battery (19) is placed in the card slot, a heating plate (26) is installed at the bottom of the card slot, a hydraulic cylinder (11) is installed inside the box (1), a piston rod of the hydraulic cylinder (11) passes through the box (1) and is fixed with a first connecting rod (7), the first connecting rod (7) is fixed with an explosion-proof glass cover (4) through a second connecting rod (8), one end of the explosion-proof glass cover (4) is provided with a through hole (14), a fixing block (20) is fixed on the explosion-proof glass cover (4), a baffle (6) for shielding the through hole (14) is slidably sleeved inside the fixing block (20), and a lifting mechanism (5) for driving the baffle (6) to slide and lift is installed on the explosion-proof glass cover (4).

2. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: The inner wall of the storage groove (18) is provided with a cavity (23), and the inner wall of the storage groove (18) is provided with an exhaust hole (24). A sleeve (10) is fixedly passed through the side of the box body (1), and a smoke sensor (30), a combustible gas sensor (31), and an exhaust fan (21) are installed in the sleeve (10). The sleeve (10) is connected to the cavity (23) through an exhaust pipe (27).

3. A lithium battery thermal runaway simulation device with good safety protection according to claim 2, characterized in that: A reinforcing rod (22) is fixed inside the cavity (23).

4. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: A thermocouple (25) is installed on the side of the lithium battery (19).

5. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: A fire extinguishing agent storage tank (12) is installed inside the box body (1), a liquid pump (13) is installed inside the fire extinguishing agent storage tank (12), the outlet of the liquid pump (13) is connected to an annular tube (15) through a hose (9), the annular tube (15) is fixed inside the explosion-proof glass cover (4), and a nozzle (16) is connected to the annular tube (15).

6. A lithium battery thermal runaway simulation device with good safety protection according to claim 5, characterized in that: The storage tank (18) is connected to a sewage discharge pipe (28), which passes through the storage tank (18) and the box body (1) and is equipped with a shut-off valve (29).

7. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: The lifting mechanism (5) comprises a motor (51), a gear (52), and a rack (53); the motor (51) is mounted on the top of the explosion-proof glass cover (4); the gear (52) is fixedly sleeved on the output shaft of the motor (51); the rack (53) is embedded in the baffle (6); and the gear (52) is meshed with the rack (53).

8. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: A camera (17) is installed on the inner top of the explosion-proof glass cover (4).

9. A lithium battery thermal runaway simulation device with good safety protection according to claim 1, characterized in that: Rollers (3) are installed at the four corners of the bottom of the box body (1), brake pads are arranged on the rollers (3), and a box door (2) is installed on the side of the box body (1).

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