Explosion-proof flame-retardant structure of lithium battery

Abstract

The utility model discloses an explosion-proof flame-retardant structure of a lithium battery, and relates to the technical field of lithium batteries. The explosion-proof and flame-retardant structure of the lithium battery comprises an explosion-proof box used for installing a lithium battery body; the box cover is fixedly connected with the explosion-proof box through bolts; and the fire extinguishing assembly comprises a sealing cavity formed in the box cover and an inflation air bag fixedly arranged in the sealing cavity, an inflation pipe extending to the upper surface of the box cover is embedded in the inner top wall of the inflation air bag, and the inflation air bag is filled with high-pressure carbon dioxide gas. Through the arrangement of the fire extinguishing assembly, when the lithium battery body in the explosion-proof box is on fire, carbon dioxide can be automatically sprayed to the top of the lithium battery body, so that the carbon dioxide automatically extinguishes fire of the lithium battery body on fire, and the aim of automatically retarding flame and extinguishing fire is fulfilled; and the lithium battery body is prevented from exploding due to ignition.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to an explosion-proof and flame-retardant structure of a lithium battery. Background Technique

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive and negative electrode materials and using a non-aqueous electrolyte solution. There is an existing patent for an explosion-proof and flame-retardant structure of a lithium battery, with the patent publication number CN211295231U, which includes a housing. A threaded hole is opened on the housing, and a first fixing bolt is screwed into the threaded hole. The end of the first fixing bolt is in hard contact with a breathable explosion-proof plate. The breathable explosion-proof plate is an arc-shaped breathable explosion-proof plate, and a lithium battery is sleeved on the breathable explosion-proof plate. The left side of the housing is fixed with a second slide rail by bolts, and the right side of the housing is fixed with a first slide rail by bolts. A telescopic rod is sleeved on the first slide rail and the second slide rail, and the telescopic rod is connected to the breathable explosion-proof plate by bolts. The utility model can adjust the position of the breathable explosion-proof plate in the up and down direction according to the size of the lithium battery to clamp the lithium battery. After the adjustment is completed, the breathable explosion-proof plate is clamped by screwing the handle into the first fixing bolt, and at the same time, the explosion of the lithium battery is prevented, and heat dissipation can be effectively carried out. The utility model can be applied to different models of lithium batteries and effectively achieve the effects of explosion-proof and flame-retardant.

[0003] Regarding the above related technologies, the inventor believes that there are the following defects: Although the technical solution proposed by the above patent technology can achieve the effects of flame retardancy and explosion prevention, after the lithium battery catches fire, it cannot automatically extinguish the burning lithium battery in the first place. Personnel need to use external fire-fighting equipment to extinguish the fire, and there is a risk of explosion when external personnel extinguish the fire, which poses a certain safety hazard.

[0004] Therefore, we propose an explosion-proof and flame-retardant structure of a lithium battery to solve the above problems. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides an explosion-proof and flame-retardant structure of a lithium battery, which solves the problem in the prior art that it is impossible to automatically extinguish a burning lithium battery.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: An explosion-proof and flame-retardant structure of a lithium battery, comprising:

[0007] An explosion-proof box, which is used for installing the lithium battery body, and an installation frame for installing the lithium battery body is arranged on the inner bottom wall of the explosion-proof box;

[0008] A box cover, which is used for closing the explosion-proof box, and the box cover is fixedly connected to the explosion-proof box by bolts;

[0009] Fire extinguishing component, which is used to extinguish fire when the lithium battery body catches fire. The fire extinguishing component includes a sealed cavity opened inside the box cover, and an inflatable airbag fixed inside the sealed cavity. The inner top wall of the inflatable airbag is embedded with a filling tube extending to the upper surface of the box cover, and the inside of the inflatable airbag is filled with high-pressure carbon dioxide gas. The fire extinguishing component further includes three fixed cylinders fixedly arranged on the inner bottom wall of the sealed cavity at equal intervals, and a sliding disc is slidably arranged on the inner wall of the fixed cylinder. An installation hole is opened on the upper surface of the sliding disc, a syringe is fixedly arranged on the inner wall of the installation hole, the bottom end of the syringe is fixedly provided with an atomizing nozzle, and sliding holes for the syringe to slide are opened on both the upper surface and the lower surface of the fixed cylinder. A motor for driving the sliding disc to move up and down is fixedly arranged on the inner bottom wall of the fixed cylinder. A flame sensor and a PLC controller are respectively fixedly arranged on the lower surface and the upper surface of the box cover.

[0010] Preferably, the output end of the motor is fixedly provided with a threaded column, and the top end of the threaded column is rotatably connected to the inner top wall of the fixed cylinder. A threaded hole threadedly connected to the outer surface of the threaded column is opened on the upper surface of the sliding disc.

[0011] Preferably, a limiting rod is fixedly arranged between the inner top wall and the inner bottom wall of the fixed cylinder, and a through hole slidably connected to the surface of the limiting rod is opened on the lower surface of the sliding disc.

[0012] Preferably, a sealing plug is arranged at the top end of the filling tube, and a filling one-way valve is arranged at the bottom end of the filling tube.

[0013] Preferably, both the motor and the flame sensor are electrically connected to the PLC controller through wires.

[0014] Preferably, flame retardant cavities are opened inside the four side boxes of the explosion-proof box, and melamine foam is filled inside the flame retardant cavities. Longitudinal steel bars are arranged on the inner walls of the four side boxes of the explosion-proof box.

[0015] Preferably, a number of air permeable and heat dissipating tubes are arranged in a rectangular array on both inner walls of the explosion-proof box, and the other ends of the air permeable and heat dissipating tubes extend to the outside of the explosion-proof box.

[0016] Beneficial effects

[0017] The utility model provides an explosion-proof and flame-retardant structure for a lithium battery. Compared with the prior art, the following beneficial effects are achieved:

[0018] In the explosion-proof and flame-retardant structure of the lithium battery, by arranging a fire extinguishing component, when the lithium battery body in the explosion-proof box catches fire, carbon dioxide can be automatically sprayed on the top of the lithium battery body, so that the carbon dioxide automatically extinguishes the burning lithium battery body, thereby achieving the purpose of automatic flame retardant and fire extinguishing, and avoiding the explosion of the lithium battery body due to fire. Description of the drawings

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the present utility model;

[0020] Figure 2 Schematic diagram of the sectional structure of the present utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of part A in;

[0022] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of part B in;

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the sliding disc of the present utility model.

[0024] In the figure:

[0025] 100, explosion-proof box; 101, melamine foam; 102, longitudinal steel bars;

[0026] 200, lithium battery body;

[0027] 300, mounting bracket;

[0028] 400, box cover;

[0029] 500, fire extinguishing component; 501, sealing cavity; 502, inflatable airbag; 503, filling pipe; 504, fixed cylinder; 505, sliding disc; 506, syringe; 507, atomizing nozzle; 508, motor; 509, flame sensor; 5010, PLC controller; 5011, threaded column; 5012, limiting rod; 5013, sealing plug; 5014, filling one-way valve;

[0030] 600, breathable heat dissipation pipe. Specific implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Please refer to Figures 1-5 , the present utility model provides a technical solution: an explosion-proof and flame-retardant structure for a lithium battery, including:

[0033] An explosion-proof box 100 is used for installing the lithium battery body 200. An installation frame 300 for installing the lithium battery body 200 is provided on the inner bottom wall of the explosion-proof box 100;

[0034] Flame-retardant cavities are provided inside the four side boxes of the explosion-proof box 100, and melamine foam 101 is filled inside the flame-retardant cavities. Longitudinal steel bars 102 are provided on the inner walls of the four side boxes of the explosion-proof box 100. The melamine foam 101 filled inside the flame-retardant cavities can effectively retard the spread of fire, and the setting of the longitudinal steel bars 102 effectively improves the overall strength of the explosion-proof box 100.

[0035] A number of air-permeable heat dissipation pipes 600 are arranged in a rectangular array on both inner walls of the explosion-proof box 100, and the other ends of the air-permeable heat dissipation pipes 600 extend to the outside of the explosion-proof box 100, facilitating heat dissipation when the lithium battery body 200 is operating.

[0036] Among them, in the explosion-proof and flame-retardant structure of the lithium battery, by setting the melamine foam 101 and the longitudinal steel bars 102, the four side boxes of the explosion-proof box 100 have good flame-retardant and heat-insulating properties, avoiding the situation of the explosion-proof box 100 catching fire. At the same time, the setting of the longitudinal steel bars 102 effectively improves the explosion-proof performance of the explosion-proof box 100, and the setting of the air-permeable heat dissipation pipes 600 facilitates the rapid discharge of the heat generated when the lithium battery body 200 is operating, achieving the purpose of heat dissipation.

[0037] A box cover 400 is used for closing the explosion-proof box 100, and the box cover 400 is fixedly connected to the explosion-proof box 100 by bolts;

[0038] A fire extinguishing component 500 is used for extinguishing fire when the lithium battery body 200 catches fire. The fire extinguishing component 500 includes a sealed cavity 501 opened inside the box cover 400 and an inflatable airbag 502 fixed inside the sealed cavity 501. An injection pipe 503 extending to the upper surface of the box cover 400 is embedded in the inner top wall of the inflatable airbag 502. A sealing plug 5013 is provided at the top end of the injection pipe 503, and an injection one-way valve 5014 is provided at the bottom end of the injection pipe 503, facilitating the injection of carbon dioxide gas into the inside of the inflatable airbag 502.

[0039] Moreover, the interior of the inflatable airbag 502 is filled with high-pressure carbon dioxide gas. The fire extinguishing assembly 500 further includes three fixed cylinders 504 fixedly arranged at equal intervals on the inner bottom wall of the sealed cavity 501. A sliding disk 505 is slidably arranged on the inner wall of the fixed cylinder 504. An installation hole is formed on the upper surface of the sliding disk 505. A syringe 506 is fixedly arranged on the inner wall of the installation hole. An atomizing nozzle 507 is fixedly arranged at the bottom end of the syringe 506. Sliding holes for the syringe 506 to slide through are formed on both the upper surface and the lower surface of the fixed cylinder 504. A motor 508 for driving the sliding disk 505 to move up and down is fixedly arranged on the inner bottom wall of the fixed cylinder 504. A threaded column 5011 is fixedly arranged at the output end of the motor 508, and the top end of the threaded column 5011 is rotatably connected to the inner top wall of the fixed cylinder 504. A threaded hole threadedly connected to the outer surface of the threaded column 5011 is formed on the upper surface of the sliding disk 505, which facilitates the automatic lifting and lowering of the sliding disk 505 by the rotation of the threaded column 5011.

[0040] A limiting rod 5012 is fixedly arranged between the inner top wall and the inner bottom wall of the fixed cylinder 504. A through hole slidably connected to the surface of the limiting rod 5012 is formed on the lower surface of the sliding disk 505, effectively ensuring the stability of the sliding disk 505 during lifting and lowering.

[0041] A flame sensor 509 and a PLC controller 5010 are respectively fixedly arranged on the lower surface and the upper surface of the box cover 400.

[0042] Both the motor 508 and the flame sensor 509 are electrically connected to the PLC controller 5010 through wires. The model of the flame sensor 509 is D-LX100, and the PLC controller 5010 is a Siemens PLC controller.

[0043] Among them, for the explosion-proof and flame-retardant structure of the lithium battery, by setting the fire extinguishing assembly 500, when the lithium battery body 200 in the explosion-proof box 100 catches fire, it can automatically spray carbon dioxide on the top of the lithium battery body 200, enabling the carbon dioxide to automatically extinguish the burning lithium battery body 200, thereby achieving the purpose of automatic flame retardant and fire extinguishing and avoiding the explosion of the lithium battery body 200 due to fire.

[0044] During operation, when the lithium battery body 200 in the explosion-proof box 100 catches fire, the flame sensor 509 can transmit a signal to the PLC controller 5010. The PLC controller 5010 automatically controls the motor 508 to rotate. The rotation of the motor 508 drives the threaded column 5011 to rotate. The rotation of the threaded column 5011 drives the sliding disc 505 to move upward. The upward movement of the sliding disc 505 drives the syringe 506 to move upward, so that the top of the syringe 506 passes through the sliding hole in the inner top wall of the fixed cylinder 504 and enters the inside of the sealing cavity 501, and punctures into the inside of the inflatable airbag 502. When the syringe 506 penetrates into the inside of the inflatable airbag 502, the high-pressure carbon dioxide gas in the inflatable airbag 502 can pass through the syringe 506 and be sprayed into the inside of the explosion-proof box 100 through the atomizing nozzle 507, spraying carbon dioxide on the top of the lithium battery body 200, so that the carbon dioxide automatically extinguishes the burning lithium battery body 200, thus achieving the purpose of automatic flame retardant and fire extinguishing, and avoiding the explosion of the lithium battery body 200 due to fire.

[0045] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. An explosion-proof and flame-retardant structure of a lithium battery, characterized in that: include: An explosion-proof box (100) for installing a lithium battery body (200), wherein an inner bottom wall of the explosion-proof box (100) is provided with a mounting frame (300) for installing the lithium battery body (200); A box cover (400) is used to seal the explosion-proof box (100), and the box cover (400) is fixedly connected to the explosion-proof box (100) by bolts; A fire extinguishing assembly (500) is used to extinguish a fire when a lithium battery body (200) is on fire. The fire extinguishing assembly (500) comprises a sealed cavity (501) opened inside a box cover (400), and an inflatable airbag (502) fixed inside the sealed cavity (501). A filling pipe (503) extending to the upper surface of the box cover (400) is embedded in the inner top wall of the inflatable airbag (502), and the interior of the inflatable airbag (502) is filled with high-pressure carbon dioxide gas. The fire extinguishing assembly (500) also comprises three fixed cylinders (504) fixedly arranged at equal distances on the inner bottom wall of the sealed cavity (501), and the fixed cylinders (504) ) is slidably provided with a sliding disk (505), a mounting hole is provided on the upper surface of the sliding disk (505), a needle tube (506) is fixedly provided on the inner wall of the mounting hole, an atomizing nozzle (507) is fixedly provided at the bottom end of the needle tube (506), and sliding holes for sliding the needle tube (506) are provided on the upper and lower surfaces of the fixed cylinder (504), a motor (508) for driving the sliding disk (505) to move up and down is fixedly provided on the inner bottom wall of the fixed cylinder (504), and a flame sensor (509) and a PLC controller (5010) are fixedly provided on the lower and upper surfaces of the box cover (400), respectively.

2. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: A threaded column (5011) is fixedly provided at the output end of the motor (508), and the top end of the threaded column (5011) is rotatably connected to the inner top wall of the fixed cylinder (504), and a threaded hole threadedly connected to the outer surface of the threaded column (5011) is provided on the upper surface of the sliding disk (505).

3. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The inner top wall and the inner bottom wall of the fixed cylinder (504) are fixedly provided with a limiting rod (5012), and the lower surface of the sliding plate (505) is provided with a through hole which is slidably connected to the surface of the limiting rod (5012).

4. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: A sealing plug (5013) is provided at the top end of the filling tube (503), and a filling one-way valve (5014) is provided at the bottom end of the filling tube (503).

5. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The motor (508) and the flame sensor (509) are both electrically connected to the PLC controller (5010) via wires.

6. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The four side boxes of the explosion-proof box (100) are each provided with a flame retardant cavity, and the interior of the flame retardant cavity is filled with melamine foam (101). The inner walls of the four side boxes of the explosion-proof box (100) are each provided with longitudinal steel bars (102).

7. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: A plurality of air-permeable heat-dissipating pipes (600) are arranged in a rectangular array on the inner walls of both sides of the explosion-proof box (100), and the other ends of the air-permeable heat-dissipating pipes (600) extend to the outside of the explosion-proof box (100).

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