Lithium battery module thermal runaway fire-fighting simulation test device and control method

Abstract

The invention discloses a lithium battery module thermal runaway fire-fighting simulation test device and a control method, and relates to the technical field of lithium battery module test.The lithium battery module thermal runaway fire-fighting simulation test device comprises a simulation test box and a box door hinged to one side of the simulation test box, a heating mechanism is arranged on the simulation test box, and a fire extinguishing mechanism is arranged in the simulation test box; a pushing assembly is arranged on one side of the top of the fire extinguishing mechanism; and the cooling pool is fixedly arranged on one side in the simulation test box, and the cooling pool is used for extinguishing the fire of the lithium battery. By arranging the fire extinguishing mechanism, fire extinguishing can be conveniently conducted on a burning lithium battery through cooperation of a cooling pond and a spraying head, meanwhile, the lithium battery is borne through a bearing assembly, then the bearing assembly is driven to move through a driving assembly, and through cooperation of an elastic assembly and a concave-convex assembly, the bearing assembly and the lithium battery oscillate; and therefore, the burning device is vibrated, and meanwhile, the cooling liquid on the lithium battery can be vibrated.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery module testing, and in particular to a lithium battery module thermal runaway fire simulation testing device and a control method. Background Art

[0002] At present, with the development of electric power technology, there are more and more types of batteries. Among them, lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become mainstream. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable.

[0003] Among them, lithium batteries may experience thermal runaway as the external environment changes. Thermal runaway refers to the phenomenon that the temperature of lithium batteries rises sharply due to the melting of the internal diaphragm, the rapid occurrence of internal short circuits and the conversion to heat. There are many reasons for thermal runaway of lithium batteries, which can generally be divided into three categories: mechanical abuse, electrical abuse and thermal abuse. Mechanical abuse refers to the situation in which the battery is squeezed, collided, etc. during use, causing a short circuit, generating a large amount of heat, and triggering side reactions to produce heat, which in turn causes a sharp rise in temperature and leads to thermal runaway. Electrical abuse refers to the situation in which the battery is charged and discharged due to overcharging and overdischarging, causing a micro-short circuit inside the battery, generating a large amount of heat, thereby triggering side reactions to produce heat, and ultimately causing thermal runaway of the battery. Thermal abuse refers to the situation in which the temperature of the battery rises due to high external temperatures, thereby triggering a series of side reactions to produce heat, causing the temperature of the battery to rise sharply, and ultimately leading to thermal runaway.

[0004] However, during the thermal runaway test of lithium batteries, since lithium batteries may produce open flames and other phenomena, fires need to be extinguished in time. Generally, fire extinguishing agents are used to extinguish the fire. When the fire spreads, water is sprayed to extinguish the fire. However, water spraying will cause a large amount of liquid to adhere to the lithium battery, which is inconvenient to remove. For this reason, we propose a lithium battery module thermal runaway fire simulation test device and control method. Summary of the invention

[0005] The purpose of the present invention is to provide a lithium battery module thermal runaway fire simulation test device and control method. By setting up a fire extinguishing mechanism, it is convenient to use the cooling pool and the sprinkler head to extinguish the burning lithium battery. At the same time, the lithium battery is supported by a supporting component, and then the supporting component is driven to move by the driving component. The elastic component and the concave-convex component are used to make the supporting component and the lithium battery vibrate, thereby shaking down the burning device and shaking down the coolant on the lithium battery.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a thermal runaway fire simulation test device for a lithium battery module, comprising a simulation test box and a box door hingedly arranged on one side of the simulation test box, wherein a heating mechanism is arranged on the simulation test box, a fire extinguishing mechanism is arranged inside the simulation test box, a pushing assembly is arranged on one side of the top of the fire extinguishing mechanism, and the fire extinguishing mechanism comprises:

[0008] A cooling pool, the cooling pool is fixedly arranged on one side of the simulation test box, and the cooling pool is used to extinguish the fire of the lithium battery;

[0009] A load-bearing component is disposed inside the cooling pool, and the load-bearing component is used to carry the lithium battery;

[0010] A connecting component, wherein the connecting component is fixedly connected to one side of the bearing component, a driving component is disposed on one side of the connecting component, the driving component is used to drive the connecting component to move, and an elastic component is disposed between the connecting component and the driving component;

[0011] A concave-convex component, wherein the concave-convex component is fixedly arranged on one side of the top of the cooling pool, and the bearing component is in contact with the concave-convex component through the elastic component;

[0012] A pushing component is fixedly installed on one side of the middle part of the simulation test box, and is used to push the lithium battery to move.

[0013] Preferably, the bearing assembly includes a bearing plate fixedly connected to the end face of the connecting assembly, an L-shaped plate fixedly connected to both ends of the bearing plate, an extrusion plate fixedly connected to one side of the L-shaped plate, an inclined groove opened on the outer surface of the bearing plate and an empty groove opened in the middle of the L-shaped plate, and the bearing plate is folded in a V-shape, the interior of the cooling pool is filled with coolant, and the bearing plate is located below the level of the coolant.

[0014] Preferably, the concave-convex component includes a wavy block fixedly connected to the inner wall of the cooling pool, and the protruding part of the wavy block is set as a convex part, the concave part of the wavy block is set as a recessed part and a roller installed on the end of the convex part, and the height of the convex part of the wavy block decreases successively from bottom to top.

[0015] Preferably, the driving assembly includes a driving motor fixedly installed and connected to the bottom of the simulation test box, a driving threaded rod fixedly connected to the output end of the driving motor, a movable plate threadedly connected to the outer surface of the driving threaded rod, a limiting hole opened on the outer surface of the movable plate and a limiting rod plugged into the limiting hole, and the end face of the limiting rod is fixedly connected to the bottom end of the simulation test box.

[0016] Preferably, the heating mechanism includes a heating device fixedly arranged at the middle end of the simulation test box. A spray head is arranged above the heating device, and the spray head is fixedly installed at the top of the simulation test box. A control panel is fixedly arranged on the outer surface of the simulation test box, and a smoke sensor is fixedly installed on the top of the simulation test box.

[0017] Preferably, the connecting component includes an L-shaped piece fixedly connected to one side of the bearing plate, a plurality of connecting plates fixedly connected to one side of the L-shaped piece, and a transverse plate fixedly connected to end surfaces of the plurality of connecting plates, and the transverse plate is connected to the elastic component.

[0018] Preferably, the bottoms of the two L-shaped plates are fixedly connected to an inclined plate, and the tops of the inclined plates are fixedly connected to a triangular plate.

[0019] Preferably, the elastic component includes a rotating rod hinged to one side of the movable plate, a sliding frame hinged to one end of the rotating rod, a sliding rod inserted into the sliding frame, a fixed block fixedly connected to one end of the sliding rod and an extrusion spring sleeved on the outer surface of the sliding rod, and the fixed block is fixedly connected to the outer surface of the connecting component, the number of the elastic components is set to two, and a limiting component is provided at the end of the sliding rod, and the limiting component includes a fixed round block fixedly connected to the other end of the sliding rod, through grooves opened on both sides of the fixed round block, mounting grooves opened on the other two sides of the fixed round block, a fixing ring sleeved on the outer surface of the fixed round block, and mounting blocks fixedly connected to both sides of the inside of the fixing ring.

[0020] Preferably, the pushing assembly includes an electric telescopic rod fixedly connected to the inner side of the simulation test box and a push plate fixedly connected to the output end of the electric telescopic rod, and the pushing assembly is located on one side of the top of the heating device.

[0021] In a second aspect, the present invention provides a control method for a lithium battery module thermal runaway fire simulation test device as described above, and the specific steps of the control method are as follows:

[0022] S1. Open the box door, place the lithium battery on the top of the heating device, then close the box door, and then operate the control panel to make the heating device start heating, so as to heat the lithium battery for thermal runaway test;

[0023] S2. When an open flame occurs during the lithium battery heating test, the smoke generated is sensed by the smoke sensor, causing the sprinkler head to start spraying fire extinguishing agent, thereby extinguishing the lithium battery on the heating device;

[0024] S3, pushing the lithium battery by the pushing assembly, so that the lithium battery falls from the heating device into the cooling pool until it falls on the bearing plate of the bearing assembly, thereby using the coolant on the cooling pool to extinguish the fire, thereby extinguishing the burning lithium battery;

[0025] S4. The driving motor drives the threaded rod to rotate, thereby driving the moving plate to move up, and the moving plate drives the cross plate and its L-shaped plate to move up, thereby driving the supporting plate to move up. At the same time, since the extrusion spring in the elastic component is in a compressed state, the extrusion plate contacts the roller on the concave-convex component. The design of the convex part and the concave part makes the moving supporting component vibrate, so that the impurities produced by the combustion fall from the inclined groove and the empty groove. When the supporting plate drives the lithium battery to move out the coolant, the vibrating supporting plate will cause the coolant of the lithium battery to vibrate and fall, thereby facilitating the removal of the lithium battery.

[0026] Technical effects and advantages of the present invention:

[0027] (1) The lithium battery is moved by pushing the component, so that the lithium battery falls into the cooling pool and falls onto the bearing component, thereby using the cooling pool to extinguish the fire of the lithium battery. Subsequently, the connecting component is driven upward by the driving component, thereby driving the bearing component upward. At this time, since the elastic component is in a compressed state, the bearing component can be fully in contact with the concave-convex component. Due to the design of the concave-convex component, the upward bearing component will cause the bearing component to vibrate, so that impurities generated by combustion fall from the bearing component into the cooling pool. Subsequently, the bearing component and its lithium battery are further vibrated, which will cause the coolant on the lithium battery to fall off, thereby facilitating the removal of the lithium battery.

[0028] (2) Move the fixing ring inward to separate the mounting block from the mounting groove, then rotate the fixing ring 90 degrees to align the mounting block with the through groove, so that the mounting block moves out of the through groove, and then replace the extrusion spring. Then insert the mounting block on the fixing ring along the through groove so that the mounting block passes over the through groove, and then rotate the fixing ring 90 degrees to slightly reset the extrusion spring so that the mounting block engages with the mounting groove, thereby completing the replacement of the extrusion spring, thereby facilitating full fit between the bearing assembly and the concave-convex assembly;

[0029] (3) The extrusion plate on the load-bearing component contacts the roller. When the load-bearing component moves upward, due to the setting of the protrusion and the recessed portion, the extrusion plate will contact the upper roller in turn, and the roller will also facilitate the upward movement of the load-bearing component. Due to the setting of the size of the protrusion, the load-bearing component will produce an oscillation effect, thereby causing the impurities generated by combustion on the load-bearing plate to fall off, and also causing the coolant on the lithium battery to vibrate down, so as to facilitate the removal of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the internal structure of the simulation test box of the present invention.

[0032] Figure 3 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0033] Figure 4 It is a schematic diagram of the structure of the bearing assembly of the present invention.

[0034] Figure 5 It is a schematic diagram of the structure of the elastic component of the present invention.

[0035] Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure at point B in the middle.

[0036] Figure 7 It is a schematic diagram of the fixing ring structure of the present invention.

[0037] In the figure: 1. Simulation test box; 2. Box door; 3. Control panel; 4. Heating device; 5. Sprinkler head; 6. Cooling pool; 7. Driving assembly; 701. Driving motor; 702. Driving threaded rod; 703. Moving plate; 704. Limiting rod; 705. Limiting hole; 8. Elastic assembly; 801. Rotating rod; 802. Fixed block; 803. Sliding frame; 804. Sliding rod; 805. Extrusion spring; 9. Connecting assembly; 901. L-shaped piece; 902. Connecting plate; 10. Carrying assembly; 1001. Carrying plate; 1002. L-shaped plate; 1003. Oblique groove; 1004. Extrusion plate; 1005. Empty groove; 11. Oblique plate; 12. Concave-convex assembly; 1201. Wave-shaped block; 1202. Raised portion; 1203. Concave portion; 1204. Roller; 13. Limiting assembly; 1301. Fixed round block; 1302. Through groove; 1303. Mounting groove; 1304. Fixed ring; 1305. Mounting block; 14. Pushing assembly. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention provides Figure 1-7A lithium battery module thermal runaway fire simulation test device shown includes a simulation test box 1 and a box door 2 hingedly arranged on one side of the simulation test box 1, a heating mechanism is arranged on the simulation test box 1, a cooling mechanism is arranged inside the simulation test box 1, and a pushing component 14 is arranged on one side of the top of the cooling mechanism, and the cooling mechanism includes: a cooling pool 6, the cooling pool 6 is fixedly arranged on one side of the inside of the simulation test box 1, and the cooling pool 6 is used to extinguish the lithium battery; a bearing component 10, the bearing component 10 is arranged inside the cooling pool 6, and the bearing component 10 is used to bear the lithium battery; a connecting component 9, the connecting component 9 is fixedly connected to one side of the bearing component 10, a driving component 7 is arranged on one side of the connecting component 9, the driving component 7 is used to drive the connecting component 9 to move, and an elastic component 8 is arranged between the connecting component 9 and the driving component 7; a concave-convex component 12, the concave-convex component 12 is fixedly arranged on one side of the top of the cooling pool 6, and the bearing component 10 contacts the concave-convex component 12 through the elastic component 8; The pushing component 14 is fixedly installed on one side of the middle part of the simulation test box 1, and the pushing component 14 is used to push the lithium battery to move; when the lithium battery undergoes a thermal runaway experiment inside the simulation test box 1 and causes the lithium battery to generate an open flame, the pushing component 14 pushes the lithium battery to move, so that the lithium battery falls into the cooling pool 6, and the lithium battery falls on the bearing component 10, so that the cooling pool 6 is used to extinguish the lithium battery, and then the driving component 7 drives the connecting component 9 to move upward, thereby driving the bearing component 10 to move upward. At this time, since the elastic component 8 is in a compressed state, the bearing component 10 can be fully in contact with the concave-convex component 12. The upward bearing component 10 will cause the bearing component 10 to vibrate due to the design of the concave-convex component 12, so that the impurities generated by the combustion fall from the bearing component 10 into the cooling pool 6, and then the bearing component 10 and its lithium battery further vibrate, which will vibrate and drop the coolant on the lithium battery, thereby facilitating the removal of the lithium battery.

[0040] It should be further explained that the bearing assembly 10 includes a bearing plate 1001 fixedly connected to the end face of the connecting assembly 9, an L-shaped plate 1002 fixedly connected to both ends of the bearing plate 1001, an extrusion plate 1004 fixedly connected to one side of the L-shaped plate 1002, an inclined groove 1003 opened on the outer surface of the bearing plate 1001 and an empty groove 1005 opened in the middle of the L-shaped plate 1002, and the bearing plate 1001 is folded in a V-shape, the interior of the cooling pool 6 is filled with coolant, and the bearing plate 1001 is located below the coolant level; the bearing plate 1001 is used to carry lithium batteries, and the V-shaped folded bearing plate 1001 also facilitates impurities generated by combustion to move along the bearing plate 1001 and fall from the inclined groove 1003 and the empty groove 1005 into the cooling pool 6, wherein the coolant level slightly submerges the bearing assembly 10, so that the bearing assembly 10 can move up and over the coolant later, and a water inlet pipe and a drainage pipe are sequentially arranged on one side of the cooling pool 6 to facilitate the replacement of the coolant.

[0041] It should be noted that the concave-convex component 12 includes a wavy block 1201 fixedly connected to the inner wall of the cooling pool 6, and the protruding part of the wavy block 1201 is set as a convex part 1202, the concave part of the wavy block 1201 is set as a concave part 1203 and a roller 1204 installed at the end of the convex part 1202, and the convex part 1202 of the wavy block 1201 The height of the convex part 1202 decreases from bottom to top; when the elastic component 8 is in a compressed state, the extrusion plate 1004 on the bearing component 10 will contact the roller 1204. When the carrying component 10 moves up, due to the setting of the protrusion 1202 and the recessed portion 1203, the extrusion plate 1004 will contact the upper roller 1204 in turn, and the roller 1204 also facilitates the upward movement of the carrying component 10. Due to the setting of the size of the protrusion 1202, the carrying component 10 will produce an oscillation effect, thereby causing the impurities generated by combustion on the carrying plate 1001 to fall off, and also causing the coolant on the lithium battery to vibrate down, so as to facilitate the removal of the lithium battery.

[0042] Furthermore, the driving component 7 includes a driving motor 701 fixedly installed and connected to the bottom of the simulation test box 1, a driving threaded rod 702 fixedly connected to the output end of the driving motor 701, a movable plate 703 threadedly connected to the outer surface of the driving threaded rod 702, a limiting hole 705 opened on the outer surface of the movable plate 703 and a limiting rod 704 inserted into the limiting hole 705, and the end face of the limiting rod 704 is fixedly connected to the bottom end of the simulation test box 1; the driving motor 701 drives the driving threaded rod 702 to rotate, and due to the cooperation between the limiting hole 705 and the limiting rod 704, the movable plate 703 will not rotate, thereby making the movable plate 703 move, and the movable plate 703 drives the elastic component 8, the connecting component 9 and its bearing component 10 to move.

[0043] Furthermore, the heating mechanism includes a heating device 4 fixedly arranged at the middle end of the simulation test box 1. A spray head 5 is arranged above the heating device 4, and the spray head 5 is fixedly installed at the top of the simulation test box 1. A control panel 3 is fixedly arranged on the outer surface of the simulation test box 1, and a smoke sensor is fixedly installed on the top of the simulation test box 1; the heating device 4 is a prior art, which mainly generates heat for the lithium battery, so that the lithium battery is heated and a thermal runaway test is performed. The spray head 5 is connected to a device for supplying a fire extinguishing agent from the outside so that the spray head 5 can spray the fire extinguishing agent. The fire extinguishing agent can specifically be a fire extinguishing agent in the prior art. The control panel 3 is mainly used to control the entire device, wherein when the smoke sensor senses the burning smoke, it will be fed back to the controller connected to the control panel 3, so that the spray head 5 and its driving component 14 work, so as to carry out fire fighting. The control panel 3 can also control the forward and reverse rotation of the drive motor 701.

[0044] Furthermore, the pushing component 14 includes an electric telescopic rod fixedly connected to the inner side of the simulation test box 1 and a push plate fixedly connected to the output end of the electric telescopic rod, and the pushing component 14 is located on one side of the top of the heating device 4; the electric telescopic rod is extended to drive the push plate to move, thereby pushing the lithium battery located on the heating device 4 to fall into the cooling pool 6, and will retract and reset later.

[0045] Furthermore, the connecting component 9 includes an L-shaped piece 901 fixedly connected to one side of the supporting plate 1001, a plurality of connecting plates 902 fixedly connected to one side of the L-shaped piece 901, and a transverse plate fixedly connected to the end faces of the plurality of connecting plates 902, and the transverse plate is connected to the elastic component 8; the connecting plate 902 is connected to the L-shaped piece 901, the connecting plate 902 is connected to the supporting plate 1001, and the L-shaped piece 901 is connected to the transverse plate.

[0046] Furthermore, the bottoms of the two L-shaped plates 1002 are fixedly connected to a slanted plate 11, and the tops of the slanted plates 11 are fixedly connected to a triangular plate; when the supporting plate 1001 passes over the coolant level and needs to be reset and moved downward, the slanted plate 11 can be used to contact the concave-convex component 12, so that the supporting component 10 gradually moves backward to facilitate downward reset.

[0047] It should be further explained that the elastic component 8 includes a rotating rod 801 hinged to one side of the moving plate 703, a sliding frame 803 hinged to one end of the rotating rod 801, a sliding rod 804 inserted into the sliding frame 803, a fixed block 802 fixedly connected to one end of the sliding rod 804, and an extrusion spring 805 sleeved on the outer surface of the sliding rod 804, and the fixed block 802 is fixedly connected to the outer surface of the connecting component 9, the number of the elastic components 8 is set to two, and the end of the sliding rod 804 is set The limiting assembly 13 includes a fixed round block 1301 fixedly connected to the other end of the slide rod 804, through grooves 1302 opened on both sides of the fixed round block 1301, mounting grooves 1303 opened on the other two sides of the fixed round block 1301, a fixing ring 1304 sleeved on the outer surface of the fixed round block 1301, and mounting blocks 1305 fixedly connected to both sides of the inside of the fixing ring 1304; when the extrusion plate 1004 contacts the roller 1204, the extrusion spring 805 is in When the extrusion plate 1004 on the entire bearing assembly 10 is in a compressed state, it will fully contact the roller 1204, thereby facilitating the vibration effect of the bearing assembly 10. When the extrusion spring 805 needs to be replaced later, the fixing ring 1304 is moved inward to separate the mounting block 1305 from the mounting groove 1303, and then the fixing ring 1304 is rotated ninety degrees to align the mounting block 1305 with the through groove 1302, so that the mounting block 1305 moves out of the through groove 1302, and then the extrusion spring 805 is replaced, and then the mounting block 1305 on the fixing ring 1304 is inserted along the through groove 1302 to compress the extrusion spring 805, so that the mounting block 1305 passes over the through groove 1302, and then the fixing ring 1304 is rotated ninety degrees to slightly reset the extrusion spring 805, so that the mounting block 1305 is engaged with the mounting groove 1303, thereby completing the replacement of the extrusion spring 805, so as to facilitate the bearing assembly 10 and the concave-convex assembly 12 to fully fit.

[0048] A control method for a lithium battery module thermal runaway fire simulation test device, the specific steps of the control method are as follows:

[0049] S1, open the box door 2, place the lithium battery on the top of the heating device 4, then close the box door 2, and then operate the control panel 3 to make the heating device 4 start heating, so as to heat the lithium battery for thermal runaway test;

[0050] S2. When an open flame is generated during the lithium battery heating test, the generated smoke is sensed by the smoke sensor, causing the sprinkler head 5 to start spraying a fire extinguishing agent, thereby extinguishing the lithium battery on the heating device 4;

[0051] S3, pushing the lithium battery by the pushing assembly 14, so that the lithium battery falls from the heating device 4 into the cooling pool 6, until it falls on the carrying plate 1001 of the carrying assembly 10, so as to extinguish the fire by using the coolant on the cooling pool 6, thereby extinguishing the burning lithium battery;

[0052] S4. The driving motor 701 drives the threaded rod 702 to rotate, thereby driving the movable plate 703 to move upward, and the movable plate 703 drives the horizontal plate and its L-shaped plate 901 to move upward, thereby driving the supporting plate 1001 to move upward. At the same time, since the extrusion spring 805 in the elastic component 8 is in a compressed state, the extrusion plate 1004 contacts the roller 1204 on the concave-convex component 12, and the design of the protrusion 1202 and the concave portion 1203 is utilized to make the movable supporting component 10 vibrate, so that the impurities produced by combustion fall from the inclined groove 1003 and the empty groove 1005, and when the supporting plate 1001 drives the lithium battery to move out of the coolant, the vibrating supporting plate 1001 will cause the coolant on the lithium battery to vibrate and fall, thereby facilitating the removal of the lithium battery.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery module thermal runaway fire simulation test device, comprising a simulation test box (1) and a box door (2) hingedly arranged on one side of the simulation test box (1), characterized in that: The simulation test box (1) is provided with a heating mechanism, the interior of the simulation test box (1) is provided with a fire extinguishing mechanism, a pushing assembly (14) is provided on one side of the top of the fire extinguishing mechanism, and the fire extinguishing mechanism comprises: A cooling pool (6), wherein the cooling pool (6) is fixedly arranged at one side of the interior of the simulation test box (1), and the cooling pool (6) is used to extinguish a fire of the lithium battery; A bearing assembly (10), wherein the cooling pool (6) is provided with the bearing assembly (10), and the bearing assembly (10) is used to bear the lithium battery; A connecting component (9), the connecting component (9) being fixedly connected to one side of the bearing component (10), a driving component (7) being provided on one side of the connecting component (9), the driving component (7) being used to drive the connecting component (9) to move, and an elastic component (8) being provided between the connecting component (9) and the driving component (7); A concave-convex component (12), wherein the concave-convex component (12) is fixedly arranged on one side of the top of the cooling pool (6), and the bearing component (10) is in contact with the concave-convex component (12) via the elastic component (8); A pushing component (14) is fixedly installed on one side of the middle part of the simulation test box (1), and the pushing component (14) is used to push the lithium battery to move.

2. A lithium battery module thermal runaway fire simulation test device according to claim 1, characterized in that: The bearing assembly (10) comprises a bearing plate (1001) fixedly connected to the end surface of the connecting assembly (9), an L-shaped plate (1002) fixedly connected to both ends of the bearing plate (1001), an extrusion plate (1004) fixedly connected to one side of the L-shaped plate (1002), an inclined groove (1003) provided on the outer surface of the bearing plate (1001), and an empty groove (1005) provided in the middle of the L-shaped plate (1002), and the bearing plate (1001) is folded in a V-shape, the interior of the cooling pool (6) is filled with cooling liquid, and the bearing plate (1001) is located below the surface of the cooling liquid.

3. A lithium battery module thermal runaway fire simulation test device according to claim 1, characterized in that: The concave-convex component (12) comprises a wave-shaped block (1201) fixedly connected to the inner wall surface of the cooling pool (6), wherein the protruding portion of the wave-shaped block (1201) is arranged as a convex portion (1202), the concave portion of the wave-shaped block (1201) is arranged as a concave portion (1203) and a roller (1204) installed at the end of the convex portion (1202), and the convex height of the convex portion (1202) of the wave-shaped block (1201) decreases from bottom to top.

4. A lithium battery module thermal runaway fire simulation test device according to claim 1, characterized in that: The driving assembly (7) comprises a driving motor (701) fixedly mounted and connected to the bottom of the simulation test box (1), a driving threaded rod (702) fixedly connected to the output end of the driving motor (701), a moving plate (703) threadedly connected to the outer surface of the driving threaded rod (702), a limiting hole (705) formed on the outer surface of the moving plate (703) and a limiting rod (704) plugged into the limiting hole (705), and an end face of the limiting rod (704) is fixedly connected to the bottom of the simulation test box (1).

5. A lithium battery module thermal runaway fire simulation test device according to claim 1, characterized in that: The heating mechanism comprises a heating device (4) fixedly arranged at the middle end of the simulation test box (1). A spray head (5) is arranged above the heating device (4), and the spray head (5) is fixedly installed at the top of the simulation test box (1). A control panel (3) is fixedly arranged on the outer surface of the simulation test box (1), and a smoke sensor is fixedly installed at the top of the simulation test box (1).

6. A thermal runaway fire simulation test device for a lithium battery module according to claim 2, characterized in that: The connection assembly (9) comprises an L-shaped piece (901) fixedly connected to one side of the bearing plate (1001), a plurality of connection plates (902) fixedly connected to one side of the L-shaped piece (901), and a transverse plate fixedly connected to the end surfaces of the plurality of connection plates (902), and the transverse plate is connected to the elastic assembly (8).

7. A lithium battery module thermal runaway fire simulation test device according to claim 2, characterized in that: The bottoms of the two L-shaped plates (1002) are commonly fixedly connected to an inclined plate (11), and the tops of the inclined plates (11) are fixedly connected to a triangular plate.

8. A thermal runaway fire simulation test device for a lithium battery module according to claim 4, characterized in that: The elastic component (8) comprises a rotating rod (801) hinged to one side of the movable plate (703), a sliding frame (803) hinged to one end of the rotating rod (801), a sliding rod (804) plugged into the interior of the sliding frame (803), a fixed block (802) fixedly connected to one end of the sliding rod (804), and a compression spring (805) sleeved on the outer surface of the sliding rod (804), and the fixed block (802) is fixedly connected to the outer surface of the connecting component (9), and the number of the elastic components (8) is set to two. A limit assembly (13) is provided at the end of the slide bar (804), and the limit assembly (13) comprises a fixed round block (1301) fixedly connected to the other end of the slide bar (804), through grooves (1302) opened on both sides of the fixed round block (1301), mounting grooves (1303) opened on the other two sides of the fixed round block (1301), a fixed ring (1304) sleeved on the outer surface of the fixed round block (1301), and mounting blocks (1305) fixedly connected to the two sides of the inside of the fixed ring (1304).

9. A lithium battery module thermal runaway fire simulation test device according to claim 5, characterized in that: The pushing component (14) comprises an electric telescopic rod fixedly connected to the inner side of the simulation test box (1) and a push plate fixedly connected to the output end of the electric telescopic rod, and the pushing component (14) is located on one side of the top of the heating device (4).

10. A control method for a lithium battery module thermal runaway fire simulation test device according to any one of claims 1 to 9, characterized in that: The specific steps of the control method are as follows: S1, opening the box door (2), placing the lithium battery on top of the heating device (4), then closing the box door (2), and then operating the control panel (3) to make the heating device (4) start heating, thereby heating the lithium battery for thermal runaway testing; S2. When combustion and open flames occur during the lithium battery heating test, the generated smoke is sensed by the smoke sensor, causing the sprinkler head (5) to start spraying fire extinguishing agent, thereby extinguishing the lithium battery on the heating device (4); S3, pushing the lithium battery by the pushing assembly (14), so that the lithium battery falls from the heating device (4) into the cooling pool (6), until it falls onto the supporting plate (1001) of the supporting assembly (10), thereby using the coolant on the cooling pool (6) to extinguish the fire, thereby extinguishing the burning lithium battery; S4, the driving motor (701) drives the driving threaded rod (702) to rotate, thereby driving the moving plate (703) to move upward, and the moving plate (703) drives the horizontal plate and its L-shaped plate (901) to move upward, thereby driving the supporting plate (1001) to move upward. At the same time, since the extrusion spring (805) in the elastic component (8) is in a compressed state, the extrusion plate (1004) contacts the roller (1204) on the concave-convex component (12), and the design of the convex part (1202) and the concave part (1203) causes the moving supporting component (10) to vibrate, so that impurities generated by combustion fall from the inclined groove (1003) and the empty groove (1005), and when the supporting plate (1001) drives the lithium battery to move out of the coolant, the vibrating supporting plate (1001) causes the coolant on the lithium battery supporting component (10) to vibrate and fall, thereby facilitating the removal of the lithium battery.

Images