A plastic shell with flame retardant and explosion proof mechanism for automobile starting battery

Abstract

The invention discloses a plastic shell with a flame suppression and explosion proof mechanism for a car starting battery, belonging to the field of automobile plastic accessories. The plastic shell with a flame suppression and explosion proof mechanism for a car starting battery comprises a battery plastic shell, a sealing cover plate is arranged at the upper end of the battery plastic shell, bolts are arranged at four corners of the sealing cover plate, the sealing cover plate is fixed to the battery plastic shell by the bolts, a pair of electrode columns are arranged at the upper end of the sealing cover plate, a pair of L-shaped air vents are arranged on both sides of the sealing cover plate, a sealing leather plug is embedded at one end of the pair of L-shaped air vents, a flame suppression mechanism and an explosion proof interception mechanism are fixedly connected to the inner bottom end of the battery plastic shell, and a battery core stacking grid is fixedly connected to the upper end of the flame suppression mechanism, so that the battery core is not prone to combustion and explosion during charging, and the possibility of combustion or even explosion of the battery core can be reduced to avoid igniting surrounding objects and causing immeasurable economic losses.

Description

Technical Field

[0001] The invention relates to the field of automobile plastic accessories, and more particularly to a plastic shell with a flame suppression and explosion proof mechanism for an automobile starting battery. Background Art

[0002] A car is a power-driven, non-track-borne vehicle with four or more wheels, mainly used for: carrying people and (or) goods; towing vehicles carrying people and (or) goods; special purposes. A car needs a battery when starting. A starting battery is a lithium-ion battery / lead-acid battery / nickel-metal hydride or nickel-cadmium battery specially used for starting, lighting, ignition and power supply of vehicles, ships and aircraft. It generally refers to a car battery, or a car starting battery. Most of them have a rated capacity C of about 36 to 210A·h, forming a series with a specific energy of 35 to 45W·h / kg (measured at a 20h discharge rate energy), which can be discharged several times at a C discharge rate. The casing of a car starting battery is generally made of plastic.

[0003] There is a phenomenon in the existing society. After the Spring Festival, people drive back to the city from their hometown to work, and generally park their vehicles on the roadside or in the community until they start them again when they return home next year. When the vehicle is parked for a long time, the car engine anti-theft system, the door anti-theft system and various sensors are consuming power. Under normal circumstances, even for low-end cars, the car will be completely powered off after being parked for about five months. For the phenomenon of starting the car before returning home, the car starting battery will be in a state of power loss for a long time, which will cause irreversible damage to the battery. Later, when people need to start the car to return home and find that the car battery is out of power and take it to charge, it is not easy to see whether the battery is damaged from the appearance of the battery alone. When the real charging starts, if the battery is indeed damaged, the battery will gradually heat up after charging for a period of time, and then quickly swell. If the person is not present at this time, the battery will continue to heat up until spontaneous combustion or even explosion occurs inside. The burning or even exploding battery is easy to ignite surrounding objects, which may cause immeasurable economic losses. Therefore, the present invention provides a plastic shell with a flame retardant and explosion-proof mechanism for a car starting battery. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a plastic shell with a flame suppression and explosion-proof mechanism for a car starting battery, which can realize that when the battery bulges during charging, the battery core expands first, which causes the battery plastic shell to bulge, and the expanded battery core will squeeze the flame suppression mechanism, and the flame suppression mechanism will release a large amount of carbon dioxide gas. The gas in the battery plastic shell suddenly increases, and the gas will push out the sealing leather plug, and the excess gas will be discharged to the outside through the L-shaped vent. Since the density of carbon dioxide gas is greater than that of air, and carbon dioxide gas is released from the bottom of the battery plastic shell, the discharged excess gas is air, and the carbon dioxide gas will remain in the battery plastic shell and fully wrap the internal battery core. Lacking the combustion-supporting oxygen in the air, the battery core is not easy to spontaneously combust. If personnel have not discovered it in time at this time, the charging current will continue to be output to the battery, and the temperature of the battery core will increase. As the temperature further increases, the spring-shaped deformation memory metal rod will be deformed by the heat and thus deformed into a vertical rod shape. The deformation memory metal rod deformed into a vertical rod shape will push up the force support frame, and the force support frame will extend the metal fiber woven mesh during the upward movement. Four metal fiber woven meshes will surround the outside of the battery cell. If the battery cell explodes, the metal fiber woven mesh will intercept the fragments generated by the explosion of the battery cell. The kinetic energy of the fragments will be reduced, and it will not be easy to break through the plastic shell of the battery to prevent the scattered high-temperature fragments from igniting surrounding items and causing immeasurable economic losses. In addition, in the process of the force support frame moving upward, the elastic anti-blocking block can block the L-shaped vent hole. The L-shaped vent hole is blocked to reduce the loss of carbon dioxide gas. Carbon dioxide gas always exists around the battery cell. Without combustion-supporting adjustment, the battery cell is always not prone to combustion and explosion, which can reduce the possibility of combustion or even explosion of the battery cell.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A plastic shell with a flame suppression and explosion proof mechanism for a car starting battery, comprising a battery plastic shell, a sealing cover plate is arranged at the upper end of the battery plastic shell, bolts are arranged at the four corners of the sealing cover plate, the sealing cover plate is fixed to the battery plastic shell by the bolts, a pair of electrode columns are also arranged at the upper end of the sealing cover plate, an L-shaped vent hole is opened on both sides of the sealing cover plate, and a sealing leather plug is embedded at one end of the pair of L-shaped vent holes;

[0009] The inner bottom end of the battery plastic shell is fixedly connected with a flame suppression mechanism and an explosion-proof interception mechanism, the upper end of the flame suppression mechanism is fixedly connected with a battery core stacking grid, and the explosion-proof interception mechanism is sleeved on the outer side of the battery core stacking grid.

[0010] Furthermore, the flame retardant mechanism includes a rectangular mesh storage tray, a plastic circular connecting frame, a metal pressure plate, calcium carbonate powder, hollow isolation balls and a hydrochloric acid solution. The rectangular mesh storage tray is fixedly connected to the inner bottom end of the battery plastic shell, the inner wall of the rectangular mesh storage tray is fixedly connected to the plastic circular connecting frame, the inner wall of the plastic circular connecting frame is fixedly connected to the metal pressure plate, the plastic circular connecting frame is filled with calcium carbonate powder and hollow isolation balls, and the hollow isolation balls are filled with a hydrochloric acid solution.

[0011] Furthermore, the hollow isolation sphere is made of glass material.

[0012] Furthermore, a waterproof breathable membrane is fixedly connected to the inner wall of the rectangular mesh storage tray.

[0013] Furthermore, the outer spherical surface of the hollow isolation ball is provided with a flexible protective layer, and the surface of the flexible protective layer is provided with a plurality of evenly distributed through holes.

[0014] Furthermore, the explosion-proof interception mechanism includes a force-bearing support frame, a deformation memory metal rod, a metal fiber woven mesh and an elastic anti-blocking block. The force-bearing support frame is arranged on the outside of the battery core stacking grid, and the four corners of the lower end of the force-bearing support frame are fixedly connected with the deformation memory metal rods, and the lower ends of the four deformation memory metal rods are fixed to the inner bottom end of the battery plastic shell, and the four side edges of the lower end of the force-bearing support frame are fixedly connected with the metal fiber woven mesh, and the lower ends of the four metal fiber woven meshes are fixed to the inner bottom end of the battery plastic shell, and the upper end of the force-bearing support frame is fixedly connected with a pair of elastic anti-blocking blocks, and the elastic anti-blocking blocks are located directly below the L-shaped vent.

[0015] Furthermore, the deformation memory metal rod is made of nickel-titanium memory metal, and the initial state of the deformation memory metal rod is spring-shaped.

[0016] Furthermore, the force-bearing support frame is specifically sleeved on the outside of the battery cell stacking grid, and there is a 1mm gap between the inner wall of the force-bearing support frame and the outer wall of the battery cell stacking grid. The surface area of ​​the elastic anti-blocking block is much larger than the aperture size of the L-shaped vent.

[0017] Furthermore, the four inner corners of the battery plastic shell are fixedly connected with reinforcement rods, and the upper end of the battery plastic shell can be provided with a threaded hole in cooperation with the reinforcement rods.

[0018] Furthermore, a concave groove is provided at the upper end of the sealing cover plate, and a handle is rotatably connected to the inner wall of the concave groove.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. In this scheme, when the battery bulges during charging, the battery core expands first, which causes the battery plastic shell to bulge. The expanded battery core will squeeze the metal pressure plate. As the pressure increases, the plastic return-shaped connection frame connecting the extruded metal pressure plate and the rectangular mesh storage tray will break, and the extruded metal pressure plate will press down instantly, thereby crushing the hollow isolation ball. The hydrochloric acid solution in the hollow isolation ball will contact and react with the calcium carbonate powder to release a large amount of carbon dioxide gas. As the gas in the battery plastic shell suddenly increases, the gas will push out the sealing leather plug, and the excess gas will be discharged to the outside from the L-shaped vent. Since the density of carbon dioxide gas is greater than that of air, and carbon dioxide gas is released from the bottom of the battery plastic shell, the discharged excess gas is air, and the carbon dioxide gas will remain in the battery plastic shell and fully wrap the internal battery core. Without the combustion-supporting oxygen in the air, the battery core is not prone to spontaneous combustion.

[0022] 2. In this scheme, if personnel have not discovered it in time at this time, the charging current continues to be output into the battery, the temperature of the battery cell further increases, and the spring-shaped deformation memory metal rod will be deformed by the heat, thus deforming into a vertical rod shape. The deformation memory metal rod deformed into the vertical rod shape will push up the force support frame, and the force support frame will extend the metal fiber woven mesh during the upward movement. Four metal fiber woven meshes will surround the outside of the battery cell. If the battery cell explodes, the metal fiber woven mesh will intercept the fragments generated by the explosion of the battery cell. The kinetic energy of the fragments will be reduced, and it will not be easy to break through the plastic shell of the battery, so as to prevent the scattered high-temperature fragments from igniting surrounding items.

[0023] 3. In the process of the load-bearing support frame moving upward, the elastic anti-blocking block can block the L-shaped vent hole. The L-shaped vent hole is blocked to reduce the loss of carbon dioxide gas. Carbon dioxide gas always exists around the battery cell. Due to the lack of combustion-supporting regulation, the battery cell is always not prone to combustion and explosion, which can reduce the possibility of combustion or even explosion of the battery cell.

[0024] 4. The only possibility for the battery cell to burn or even explode in this scheme is that the pressure inside the battery plastic shell increases, and the pressure breaks the battery plastic shell or pushes open the sealing cover, causing air to enter the battery plastic shell, and the battery cell will burn or even explode. Breaking the battery plastic shell or opening the sealing cover will produce a noise, and there will be no splashing of burning materials. The sound can also alert surrounding personnel to discover it in time. Then, with the entry of air, even if the battery cell burns or even explodes, the metal fiber woven mesh will intercept the scattered high-temperature fragments to prevent ignition of surrounding objects and cause immeasurable economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic structural diagram of the sealing cover plate of the present invention in a disassembled state;

[0027] Figure 3 This is a schematic diagram of the cross-section structure of the battery plastic shell of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the metal fiber braided mesh in an extended state of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the flame suppression mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the cross-section structure of the flame suppression mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the sealing cover plate structure of the present invention;

[0032] Figure 8 It is a bottom view structural schematic diagram of the sealing cover plate of the present invention;

[0033] Fig. 9 It is a schematic diagram of the cross-sectional structure of the hollow isolation ball of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1. Battery plastic shell; 11. Reinforcement rod; 12. Threaded hole; 2. Sealing cover plate; 21. Concave groove; 22. Handle; 3. Bolt; 4. Electrode column; 5. L-shaped vent; 6. Sealing leather plug; 7. Flame suppression mechanism; 71. Rectangular mesh storage tray; 711. Waterproof breathable membrane; 72. Plastic circular connection frame; 73. Metal pressure plate; 74. Calcium carbonate powder; 75. Hollow isolation ball; 751. Flexible protective layer; 752. Through hole; 76. Hydrochloric acid solution; 8. Explosion-proof interception mechanism; 81. Force support frame; 82. Deformation memory metal rod; 83. Metal fiber woven mesh; 84. Elastic anti-blocking block; 9. Battery core stacking grid. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Example:

[0040] See also Figure 1-9 A plastic shell with a flame suppression and explosion proof mechanism for a car starting battery comprises a battery plastic shell 1, a sealing cover plate 2 is arranged at the upper end of the battery plastic shell 1, bolts 3 are arranged at the four corners of the sealing cover plate 2, the sealing cover plate 2 is fixed to the battery plastic shell 1 by the bolts 3, a pair of electrode columns 4 are also arranged at the upper end of the sealing cover plate 2, an L-shaped vent hole 5 is opened on both sides of the sealing cover plate 2, and a sealing leather plug 6 is embedded at one end of the pair of L-shaped vent holes 5;

[0041] The inner bottom end of the battery plastic shell 1 is fixedly connected with a flame suppression mechanism 7 and an explosion-proof interception mechanism 8, the upper end of the flame suppression mechanism 7 is fixedly connected with a battery core stacking grid 9, and the explosion-proof interception mechanism 8 is sleeved on the outer side of the battery core stacking grid 9;

[0042] During the use of this solution, when the battery bulges during charging, the battery core expands first, which causes the battery plastic shell 1 to bulge. The expanded battery core will squeeze the combustion suppression mechanism 7, and the combustion suppression mechanism 7 will release a large amount of carbon dioxide gas. The gas in the battery plastic shell 1 suddenly increases, and the gas will push out the sealing leather plug 6, and the excess gas will be discharged to the outside through the L-shaped vent 5. Since the density of carbon dioxide gas is greater than that of air, and the carbon dioxide gas is released from the bottom of the battery plastic shell 1, the discharged excess gas is air. The carbon dioxide gas will remain in the battery plastic shell 1 and fully wrap the internal battery core. The lack of oxygen in the air to assist combustion makes the battery core less likely to spontaneously combust. If the personnel have not discovered it in time at this time, the charging current will continue to be output to the battery, the temperature of the battery core will further increase, and the spring-shaped deformation memory metal rod 82 will The deformation memory metal rod 82 deformed into a vertical rod shape will push up the force support frame 81, and the force support frame 81 will extend the metal fiber woven mesh 83 during the upward movement. The four metal fiber woven meshes 83 will surround the outside of the battery cell. If the battery cell explodes, the metal fiber woven mesh 83 will intercept the fragments generated by the explosion of the battery cell. The kinetic energy of the fragments will be reduced, and it will not be easy to break through the battery plastic shell 1, so as to prevent the scattered high-temperature fragments from igniting surrounding items. In addition, during the upward movement of the force support frame 81, the elastic anti-blocking block 84 can block the L-shaped vent 5. The L-shaped vent 5 is blocked to reduce the loss of carbon dioxide gas. Carbon dioxide gas always exists around the battery cell. In the absence of combustion-supporting regulation, the battery cell is always not easy to burn or explode, which can reduce the possibility of combustion or even explosion of the battery cell.

[0043] Among them, the only possibility for the battery core to burn or even explode is that the pressure in the battery plastic shell 1 increases, and the pressure breaks the battery plastic shell 1 or pushes open the sealing cover 2, causing air to enter the battery plastic shell 1, and the battery core will burn or even explode. Breaking the battery plastic shell 1 or pushing open the sealing cover 2 will produce a sound, and there will be no splashing of burning materials. Moreover, the sound can also alert surrounding personnel to discover it in time. Then, with the entry of air, even if the battery core burns or even explodes, the metal fiber woven mesh 83 will intercept the scattered high-temperature fragments to avoid igniting surrounding objects and causing immeasurable economic losses.

[0044] See also Figure 1-6and 9, the flame suppression mechanism 7 comprises a rectangular mesh storage tray 71, a plastic return-shaped connection frame 72, a metal pressure plate 73, calcium carbonate powder 74, a hollow isolation ball 75 and a hydrochloric acid solution 76, the rectangular mesh storage tray 71 is fixedly connected to the inner bottom end of the battery plastic shell 1, the inner wall of the rectangular mesh storage tray 71 is fixedly connected with a plastic return-shaped connection frame 72, the inner wall of the plastic return-shaped connection frame 72 is fixedly connected with a metal pressure plate 73, the plastic return-shaped connection frame 72 is filled with calcium carbonate powder 74 and hollow isolation balls 75, and the hollow isolation balls 75 are filled with hydrochloric acid solution 76;

[0045] During the use of this solution, when the battery bulges during charging, the battery core expands first, which causes the battery plastic shell 1 to bulge. The expanded battery core will squeeze the metal pressing plate 73. As the pressure increases, the plastic return-shaped connecting frame 72 connecting the extruded metal pressing plate 73 and the rectangular mesh storage tray 71 will break, and the extruded metal pressing plate 73 will be pressed down instantly, thereby crushing the hollow isolation ball 75. The hydrochloric acid solution 76 in the hollow isolation ball 75 will react with the calcium carbonate powder 74 to release a large amount of carbon dioxide gas. As the gas in the battery plastic shell 1 suddenly increases, the gas will push out the sealing leather plug 6, and the excess gas will be discharged to the outside from the L-shaped vent 5. Since the density of carbon dioxide gas is greater than that of air, and the carbon dioxide gas is released from the bottom of the battery plastic shell 1, the discharged excess gas is air, and the carbon dioxide gas will remain in the battery plastic shell 1 and fully wrap the internal battery core. Without the combustion-supporting oxygen in the air, the battery core is not prone to spontaneous combustion.

[0046] See also Fig. 9 , the hollow isolation ball 75 is made of glass material;

[0047] During use of the present solution, the hollow isolation ball 75 made of glass material has stable chemical properties, is not easily corroded by the hydrochloric acid solution 76, can store replaceable hydrochloric acid solution 76, and will break when squeezed by the metal pressure plate 73, so that the hydrochloric acid solution 76 can flow out easily.

[0048] See also Figure 5-6 , the inner wall of the rectangular mesh storage tray 71 is fixedly connected with a waterproof breathable membrane 711;

[0049] During use of this solution, the four sides of the rectangular mesh storage tray 71 can allow carbon dioxide gas to pass through, thereby improving the release effect of carbon dioxide gas. The waterproof breathable membrane 711 can not only ensure the release effect of carbon dioxide gas, but also prevent the calcium carbonate powder 74 from getting wet.

[0050] See also Fig. 9 The outer spherical surface of the hollow isolation ball 75 is provided with a flexible protective layer 751, and the surface of the flexible protective layer 751 is provided with a plurality of evenly distributed through holes 752;

[0051] During use of this solution, when a person moves the portable battery, the flexible protective layer 751 prevents the hollow isolation ball 75 from being broken in the event of a collision. When the hollow isolation ball 75 is squeezed and broken, the through hole 752 allows the hydrochloric acid solution 76 to flow out.

[0052] See also Figure 1-4 8, the explosion-proof interception mechanism 8 includes a force-bearing support frame 81, a deformation memory metal rod 82, a metal fiber woven mesh 83 and an elastic anti-blocking block 84, the force-bearing support frame 81 is arranged on the outside of the battery core stacking grid 9, the four corners of the lower end of the force-bearing support frame 81 are fixedly connected with the deformation memory metal rod 82, the lower ends of the four deformation memory metal rods 82 are fixed to the inner bottom end of the battery plastic shell 1, the four side edges of the lower end of the force-bearing support frame 81 are fixedly connected with the metal fiber woven mesh 83, the lower ends of the four metal fiber woven meshes 83 are fixed to the inner bottom end of the battery plastic shell 1, the upper end of the force-bearing support frame 81 is fixedly connected with a pair of elastic anti-blocking blocks 84, the elastic anti-blocking blocks 84 are located directly below the L-shaped vent 5, the deformation memory metal rod 82 is made of nickel-titanium memory metal, and the initial state of the deformation memory metal rod 82 is spring-shaped;

[0053] During the use of this solution, if the personnel have not discovered it in time, the charging current continues to be output to the battery, the temperature of the battery cell further increases, and the spring-shaped deformation memory metal rod 82 will be deformed by heat, and thus deformed into a vertical rod shape. The deformation memory metal rod 82 deformed into a vertical rod shape will push up the force support frame 81, and the force support frame 81 will extend the metal fiber braided mesh 83 during the upward movement. The four metal fiber braided meshes 83 will surround the outside of the battery cell. If the battery cell explodes, the metal fiber braided mesh 83 will intercept the fragments generated by the explosion of the battery cell, and the kinetic energy of the fragments will be reduced, and it will not be easy to break through the battery plastic shell 1, so as to prevent the scattered high-temperature fragments from igniting surrounding objects;

[0054] During the upward movement of the force-bearing support frame 81, the elastic anti-blocking block 84 can block the L-shaped vent 5. The L-shaped vent 5 is blocked to reduce the loss of carbon dioxide gas. The carbon dioxide gas always exists around the battery cell. Due to the lack of combustion-supporting regulation, the battery cell is always not prone to combustion and explosion, which can reduce the possibility of combustion or even explosion of the battery cell.

[0055] See also Figure 3-4 8, the force support frame 81 is specifically sleeved on the outside of the battery core stacking grid 9, and there is a 1mm gap between the inner wall of the force support frame 81 and the outer wall of the battery core stacking grid 9, and the surface area of ​​the elastic anti-blocking block 84 is much larger than the aperture size of the L-shaped vent hole 5;

[0056] During use of the present solution, the force-bearing support frame 81 is not easily offset during its upward movement due to the guidance of the battery cell stacking grid 9. The 1 mm gap prevents the force-bearing support frame 81 from rubbing against the battery cell stacking grid 9 during its upward movement. Moreover, the surface area of ​​the elastic anti-blocking block 84 is large enough, and the 1 mm gap is not enough to cause a large offset of the force-bearing support frame 81, thereby ensuring that the elastic anti-blocking block 84 can block the L-shaped vent 5.

[0057] See also Figure 2-3 The four inner corners of the battery plastic shell 1 are fixedly connected with reinforcement rods 11, and the upper end of the battery plastic shell 1 can be provided with a threaded hole 12 in cooperation with the reinforcement rods 11;

[0058] During use of this solution, the reinforcing rod 11 can improve the overall strength of the battery plastic shell 1 on the one hand, and cooperate with the battery plastic shell 1 on the other hand so that there is enough space at the upper corner of the battery plastic shell 1 to open the threaded hole 12.

[0059] See also Figure 7 The upper end of the sealing cover plate 2 is provided with a concave groove 21, and the inner wall of the concave groove 21 is rotatably connected with a handle 22;

[0060] During use of the present invention, the handle 22 facilitates people to carry the battery. When the battery is in use, the handle 22 can be rotated and stored in the concave groove 21 without occupying too much space.

[0061] In the present invention, when the battery bulges during charging, the battery core expands first, which causes the battery plastic shell 1 to bulge. The expanded battery core will squeeze the metal pressing plate 73. As the pressure increases, the plastic return-shaped connecting frame 72 connecting the extruded metal pressing plate 73 and the rectangular mesh storage tray 71 will break, and the extruded metal pressing plate 73 will be pressed down instantly, thereby crushing the hollow isolation ball 75. The hydrochloric acid solution 76 in the hollow isolation ball 75 will contact and react with the calcium carbonate powder 74 to release a large amount of carbon dioxide gas. As the gas in the battery plastic shell 1 suddenly increases, the gas will push out the sealing leather plug 6, and the excess gas will flow out from the L-shaped vent hole 5 to the outside. The carbon dioxide gas is discharged from the outside world. Since the density of carbon dioxide gas is greater than that of air, and carbon dioxide gas is released from the bottom of the battery plastic shell 1, the excess gas discharged is air. The carbon dioxide gas will remain in the battery plastic shell 1 and fully wrap the internal battery core. Without the combustion support of oxygen in the air, the battery core is not easy to spontaneously combust. If personnel have not discovered it in time at this time, the charging current will continue to be output to the battery, and the temperature of the battery core will further increase. The spring-shaped deformation memory metal rod 82 will be deformed by heat, and thus deformed into a vertical rod shape. The deformation memory metal rod 82 deformed into a vertical rod shape will push up the force support frame 81, and the force support frame 81 will be lifted. The frame 81 will extend the metal fiber woven mesh 83 during the upward movement, and the four metal fiber woven meshes 83 will surround the outside of the battery cell. If the battery cell explodes, the metal fiber woven mesh 83 will intercept the fragments generated by the explosion of the battery cell. The kinetic energy of the fragments will be reduced, and it will not be easy to break through the plastic shell 1 of the battery to prevent the scattered high-temperature fragments from igniting surrounding items. In the process of the force-supporting frame 81 moving upward, the elastic anti-blocking block 84 can block the L-shaped vent 5. The L-shaped vent 5 is blocked to reduce the loss of carbon dioxide gas. Carbon dioxide gas always exists around the battery cell. Without combustion-supporting regulation, the battery cell is always not easy to burn and explode, which can reduce The possibility of combustion or even explosion of the battery cell is reduced. The only possibility of combustion or even explosion of the battery cell is that the pressure in the battery plastic shell 1 increases, and the pressure breaks the battery plastic shell 1 or opens the sealing cover 2, causing air to enter the battery plastic shell 1, and the battery cell will burn or even explode. Breaking the battery plastic shell 1 or opening the sealing cover 2 will produce a sound, and there will be no splashing of burning materials. Moreover, the sound can also alert surrounding personnel to discover it in time. Then, with the entry of air, even if the battery cell burns or even explodes, the metal fiber woven mesh 83 will intercept the scattered high-temperature fragments to avoid igniting surrounding objects and causing immeasurable economic losses.

[0062] The above is only a preferred specific implementation of the present invention; however, 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 solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic casing with a flame retardant and explosion proof mechanism for a vehicle starting battery, comprising a battery plastic casing (1), characterized in that: A sealing cover plate (2) is provided at the upper end of the battery plastic shell (1), bolts (3) are provided at the four corners of the sealing cover plate (2), the sealing cover plate (2) is fixed to the battery plastic shell (1) by means of the bolts (3), a pair of electrode columns (4) are also provided at the upper end of the sealing cover plate (2), an L-shaped vent (5) is provided on both sides of the sealing cover plate (2), the L-shaped vent (5) has two openings, the lower opening is vertically connected to the inner cavity of the shell (1), and the upper opening is transversely opened on the side wall of the sealing cover plate (2), the two openings are connected to form a bent L-shaped vent (5), and a sealing plug (6) is embedded at one end of the pair of L-shaped vents (5); The inner bottom end of the battery plastic shell (1) is fixedly connected to a flame suppression mechanism (7) and an explosion-proof interception mechanism (8); the upper end of the flame suppression mechanism (7) is fixedly connected to a battery core stacking grid (9); and the explosion-proof interception mechanism (8) is sleeved on the outside of the battery core stacking grid (9); The flame suppression mechanism (7) comprises a rectangular mesh storage tray (71), a plastic circular connection frame (72), a metal pressure plate (73), calcium carbonate powder (74), hollow isolation balls (75) and a hydrochloric acid solution (76); the rectangular mesh storage tray (71) is fixedly connected to the inner bottom end of the battery plastic shell (1); the inner wall of the rectangular mesh storage tray (71) is fixedly connected to the plastic circular connection frame (72); the inner wall of the plastic circular connection frame (72) is fixedly connected to the metal pressure plate (73); the plastic circular connection frame (72) is filled with calcium carbonate powder (74) and hollow isolation balls (75); and the hollow isolation balls (75) are filled with the hydrochloric acid solution (76); The explosion-proof interception mechanism (8) comprises a force-bearing support frame (81), a deformation memory metal rod (82), a metal fiber braided mesh (83) and an elastic anti-blocking block (84). The force-bearing support frame (81) is arranged on the outside of the battery core stacking grid (9). The four corners of the lower end of the force-bearing support frame (81) are fixedly connected to the deformation memory metal rod (82). The lower ends of the four deformation memory metal rods (82) are fixed to the inner bottom end of the battery plastic shell (1). The four side edges of the lower end of the force-bearing support frame (81) are fixedly connected to the metal fiber braided mesh (83). The lower ends of the four metal fiber braided mesh (83) are fixed to the inner bottom end of the battery plastic shell (1). The upper end of the force-bearing support frame (81) is fixedly connected to a pair of elastic anti-blocking blocks (84). The elastic anti-blocking blocks (84) are located directly below the L-shaped vent hole (5).

2. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The hollow isolation ball (75) is made of glass material.

3. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The inner wall of the rectangular mesh storage tray (71) is fixedly connected with a waterproof breathable membrane (711).

4. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The outer spherical surface of the hollow isolation ball (75) is provided with a flexible protective layer (751), and the surface of the flexible protective layer (751) is provided with a plurality of evenly distributed through holes (752).

5. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The deformation memory metal rod (82) is made of nickel-titanium memory metal, and the initial state of the deformation memory metal rod (82) is in a spring shape.

6. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The force-bearing support frame (81) is specifically sleeved on the outside of the battery core stacking grid (9), and there is a 1 mm gap between the inner wall of the force-bearing support frame (81) and the outer wall of the battery core stacking grid (9).

7. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: The four inner corners of the battery plastic shell (1) are all fixedly connected with reinforcement rods (11).

8. The plastic shell with a flame retardant and explosion proof mechanism for a vehicle starting battery according to claim 1, characterized in that: A concave groove (21) is formed at the upper end of the sealing cover plate (2), and a handle (22) is rotatably connected to the inner wall of the concave groove (21).

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