Battery test fire and explosion-proof container

Abstract

This utility model discloses a fireproof and explosion-proof container for battery testing, including a box body. The interior of the box body is lined with an automatic fire extinguishing material. The box body has mounting holes, and flame-retardant protective coils are installed within these holes. Flame-retardant sealant is filled between the edge of the flame-retardant protective coil and the circumferential edge of the mounting hole. This utility model features a non-sealed opening at the bottom of the box body, allowing for safe cable passage and flame isolation through the flame-retardant protective coil, preventing cable abrasion. Simultaneously, the box body is pre-filled with automatic fire extinguishing material, which rapidly releases during the initial stages of thermal runaway, using its vaporization heat absorption and free radical capture properties to suppress the fire without relying on complex pressure relief structures, thus avoiding the risk of fragmentation caused by high-pressure gas impact. This design ensures cable passage while simultaneously addressing flame retardancy, explosion suppression, and heat dissipation requirements, providing a more flexible and reliable safety protection solution for high-energy-density battery testing.

Description

Technical Field

[0001] This utility model relates to tools for battery testing, and in particular to a fireproof and explosion-proof container for battery testing. Background Technology

[0002] With the development of new energy technologies, lithium-ion batteries are widely used. However, due to the nature of their composition and system, lithium-ion batteries inherently contain oxygen. When a lithium-ion battery experiences thermal runaway, the internal chemical reactions can provide the necessary oxygen, making it extremely difficult to extinguish through normal means and posing a significant fire hazard. Therefore, all lithium-ion batteries must undergo fire and explosion protection testing before leaving the factory.

[0003] Currently, explosion-proof boxes used for testing the fire and explosion resistance of lithium-ion batteries generally suffer from problems of limited functionality and insufficient adaptability to different scenarios. On the one hand, existing products mostly adopt a fully sealed structure to prevent flame leakage, but the completely enclosed shell requires additional openings for cable routing. These openings are often sealed only with ordinary rubber rings, which have poor flame retardant properties, and high-temperature gases or sparks can easily ignite secondary flames through the holes. On the other hand, some explosion-proof boxes rely on pressure relief valves to balance internal pressure, but in the event of battery thermal runaway, the pressure relief valves may fail to open in time due to response delays or mechanical failures, exacerbating the risk of box explosion. In addition, traditional materials mostly use ordinary engineering plastics or thin steel plates, which have low flame retardant limits and are unable to suppress the chain reaction of electrolyte combustion, and lack the ability to actively dilute flammable gases. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a fireproof and explosion-proof container for battery testing.

[0005] The objective of this invention is achieved through the following technical solution: A fireproof and explosion-proof container for battery testing, comprising a housing, the interior of which is coated with an automatic fire extinguishing material, namely perfluorohexanone. The housing has mounting holes, within which a flame-retardant protective coil is installed. Flame-retardant sealant is filled between the edge of the flame-retardant protective coil and the circumferential edge of the mounting hole. When a battery spontaneously combusts, perfluorohexanone decomposes into highly reactive free radicals. These free radicals react with reactive free radicals generated during combustion (such as hydroxyl radicals and peroxide radicals), effectively interrupting the chain reaction of combustion and thus inhibiting flame propagation. Upon contact with flames or high temperatures, it rapidly vaporizes and absorbs a large amount of heat, lowering the surface temperature of the burning material and disrupting the thermodynamic conditions of combustion. The gaseous products produced after decomposition (such as carbon dioxide and hydrogen fluoride) can partially dilute the oxygen concentration in the combustion zone, reducing the supply of oxidizers and assisting in fire extinguishing.

[0006] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, the flame-retardant protective coil has a groove on its circumference. The groove is engaged with the edge of the mounting hole, and the flame-retardant sealant is filled between the side wall of the groove and the circumferential edge of the mounting hole. The groove design allows the upper and lower layers of the flame-retardant protective coil to wrap around the edge of the mounting hole at the bottom of the box, improving the stability of the installation.

[0007] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, the flame-retardant protective coil is provided with a wire passage in the middle, and the power cord passes through the wire passage into the box body.

[0008] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, the flame-retardant protective coil is made of fireproof material, and the flame-retardant sealant is a composite of a flame retardant and a sealant. The flame retardant includes inorganic flame retardants, organic flame retardants, or cellulose, with the inorganic flame retardant being aluminum silicate or ammonium phosphate. The flame-retardant protective coil uses a novel fireproof material, achieving both wire passage and heat conduction. Flame-retardant sealant is filled between the flame-retardant protective coil and the housing, achieving a double sealing and heat insulation effect.

[0009] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, it also includes a top cover. One side of the top cover is movably connected to the upper side of the box body via a hinge. The other side of the top cover is provided with a locking hook, and the other side of the upper end of the box body is provided with a locking buckle. The locking buckle is provided with a control handle. When the locking buckle is engaged with the locking hook, pressing the control handle can tighten the connection between the locking buckle and the locking hook. In the event of an internal explosion, the locking buckle and locking hook can firmly lock the box body and the top cover, preventing high-pressure gas and fragments from impacting the outside world; it also facilitates replacement and removal during battery testing.

[0010] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, the top cover is provided with a handle. The handle design makes it convenient to carry the device.

[0011] As an improvement to the fireproof and explosion-proof container for battery testing of this utility model, the top cover has a edging edge, the top cover covers the upper open opening of the box body, and the edging edge wraps around the upper outer side of the box body.

[0012] As an improvement to the fireproof and explosion-proof container for battery testing according to this utility model, the box body is made of a robust, fireproof, insulating material. The robust, fireproof insulating material can be cold-rolled steel sheet with paint or other insulating materials integrally stamped. When an explosion occurs inside the box, the box body absorbs energy through deformation, suppressing the blast shock wave; the flame-retardant protective coil blocks the internal ignition source from contacting external oxygen, preventing secondary ignition.

[0013] The beneficial effects of this invention are as follows: The bottom of the housing is designed with a non-sealed opening, allowing for safe cable passage and flame isolation via a flame-retardant protective coil, preventing cable abrasion. Simultaneously, the housing is pre-filled with perfluorohexanone extinguishing agent, which is rapidly released in the early stages of thermal runaway, utilizing its vaporization endothermic and free radical capture properties to suppress the fire without relying on a complex pressure relief structure, thus avoiding the risk of fragmentation caused by high-pressure gas impact. This design ensures cable passage while simultaneously addressing flame retardancy, explosion suppression, and heat dissipation requirements, providing a more flexible and reliable safety protection solution for high-energy-density battery testing. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a perspective view of the present invention from another angle;

[0017] Figure 4 This is a schematic diagram of the installation structure of the flame-retardant protective coil of this utility model installed at the bottom of the box;

[0018] The attached diagram is labeled as follows: 1. Box body, 2. Automatic fire extinguishing material, 3. Mounting hole, 4. Flame-retardant protective coil, 5. Flame-retardant sealant, 6. Top cover, 7. Hinge, 8. Locking hook, 9. Locking buckle, 10. Control handle, 11. Handle, 12. Edge binding, 41. Slot, 42. Cable passage. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] like Figures 1-4 As shown, a fireproof and explosion-proof container for battery testing includes a housing 1. The interior of the housing 1 is coated with an automatic fire extinguishing material 2, which is perfluorohexanone. The housing 1 has mounting holes 3, and flame-retardant protective coils 4 are installed within these holes. Flame-retardant sealant 5 is filled between the edge of the flame-retardant protective coil and the circumferential edge of the mounting hole 3. When the battery spontaneously combusts, the perfluorohexanone patch 2 decomposes highly reactive free radicals. By reacting with reactive free radicals (such as hydroxyl radicals and peroxide radicals) generated during combustion, it effectively interrupts the chain reaction of combustion, thereby inhibiting flame propagation. Upon contact with flames or high temperatures, it rapidly vaporizes and absorbs a large amount of heat, reducing the surface temperature of the burning material and disrupting the thermodynamic conditions of combustion. The gaseous products produced after decomposition (such as carbon dioxide and hydrogen fluoride) can partially dilute the oxygen concentration in the combustion zone, reducing the supply of oxidizers and assisting in fire extinguishing.

[0023] Preferably, the flame-retardant protective coil 4 has a groove 41 around its circumference. The groove 41 is engaged with the edge of the mounting hole 3, and the flame-retardant sealant 5 is filled between the side wall of the groove 41 and the circumferential edge of the mounting hole 3. The design of the groove 41 allows the upper and lower layers of the flame-retardant protective coil 4 to wrap around the edge of the mounting hole at the bottom of the housing, improving the stability of the installation.

[0024] Preferably, the flame-retardant protective coil 4 has a wire passage 42 in the middle, and the power cord passes through the wire passage 42 into the housing 1.

[0025] Preferably, the flame-retardant coil guard 4 is made of fire-retardant material, which can be synthetic rubber. The flame-retardant sealant 5 is a composite of a flame retardant and a sealant. The flame retardant includes inorganic flame retardants, organic flame retardants, or cellulose. The inorganic flame retardant is aluminum silicate or ammonium phosphate. The flame-retardant coil guard 4 uses a new type of fire-retardant material, which can both carry wires and conduct heat. The flame-retardant sealant 5 is filled between the flame-retardant coil guard 4 and the housing 1 to achieve a double sealing and heat insulation effect.

[0026] Preferably, the enclosure also includes a top cover 6, one side of which is movably connected to the upper side of the housing 1 via a hinge 7. The other side of the top cover 6 is provided with a locking hook 8, and the other side of the upper end of the housing 1 is provided with a locking buckle 9. A control handle 10 is provided on the locking buckle 9. When the locking buckle 9 is hooked onto the locking hook 8, pressing the control handle 10 can tighten the connection between the locking buckle 9 and the locking hook 8. In the event of an internal explosion, the locking buckle 9 and the locking hook 8 can firmly lock the housing 1 and the top cover 6, preventing high-pressure gas and debris from impacting the outside environment; it also facilitates battery replacement and removal during testing.

[0027] Preferably, the top cover 6 is provided with a handle 11. The handle 11 is designed to make the device easy to carry.

[0028] Preferably, the top cover 6 has a edging 12 on its edge, and the top cover 1 covers the upper open end of the box body 1, with the edging 12 wrapping around the upper outer side of the box body 1.

[0029] Preferably, the enclosure 1 is made of a robust, fire-resistant insulating material. This robust, fire-resistant insulating material can be cold-rolled steel sheet with a painted finish or other insulating materials, integrally stamped. When an explosion occurs inside the enclosure 1, the enclosure absorbs energy through deformation, suppressing the blast shock wave; the flame-retardant protective coil 4 blocks the internal ignition source from contacting external oxygen, preventing secondary ignition. Perfluorohexanone extinguishing agent primarily extinguishes fires through the following three steps:

[0030] Cooling and temperature reduction: After perfluorohexanone fire extinguishing agent is converted into a gaseous state, it absorbs the heat generated by the battery, rapidly reducing the temperature of the battery cell and eliminating the ignition source (temperature) of the three elements of a fire, thus playing a role in extinguishing the fire. Its boiling point is 49.2°C, its heat of vaporization is 88.0 kJ / kg, and its heat of evaporation is only 1 / 25 of that of water. Even at room temperature, it is easy to vaporize and has a significant cooling effect.

[0031] Isolating oxygen: Perfluorohexanone extinguishing agent has a density of 1600 kg / m³. After vaporization, the perfluorohexanone expands in volume and covers the entire cavity of the box, which can isolate oxygen and reduce the content of the oxidizer (oxygen) in the three elements of fire, so that it reaches below the combustion concentration to complete the fire extinguishing effect.

[0032] Chemical inhibition: Perfluorohexanone fire extinguishing agent has strong stability. When the temperature inside the box rises, it will undergo chemical decomposition. Some bonds in the fire extinguishing agent molecule break and combine with active free radicals generated during the flame combustion process, blocking the chain reaction of combustion and playing a role in chemical inhibition and fire extinguishing.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fireproof and explosion-proof container for battery testing, characterized in that, The device includes a housing, the interior of which is covered with automatic fire extinguishing material. The housing has mounting holes, and flame-retardant protective coils are installed inside the mounting holes. Flame-retardant sealant is used to fill the space between the edge of the flame-retardant protective coils and the circumferential edge of the mounting holes.

2. The fireproof and explosion-proof container for battery testing according to claim 1, characterized in that, The flame-retardant protective coil has a groove around its periphery, which is engaged with the edge of the mounting hole. The flame-retardant sealant is filled between the side wall of the groove and the circumferential edge of the mounting hole.

3. The fireproof and explosion-proof container for battery testing according to claim 2, characterized in that, The flame-retardant coil has a wire passage in the middle, through which the power cord passes into the housing.

4. The fireproof and explosion-proof container for battery testing according to claim 1, characterized in that, It also includes a top cover, one side of which is movably connected to the upper side of the box body via a hinge, and the other side of the top cover is provided with a locking hook. The other side of the upper end of the box body is provided with a lock, and the lock is provided with a control handle. When the lock is attached to the locking hook, pressing the control handle can tighten the connection between the lock and the locking hook.

5. The fireproof and explosion-proof container for battery testing according to claim 4, characterized in that, The top cover is equipped with a handle.

6. The fireproof and explosion-proof container for battery testing according to claim 5, characterized in that, The top cover has a edging, and the top cover covers the upper opening of the box body, with the edging wrapping around the outer side of the upper end of the box body.

7. The fireproof and explosion-proof container for battery testing according to claim 1, characterized in that, The enclosure is made of sturdy, fire-resistant insulating material.

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