Miniature temperature-sensing automatic fire extinguishing device for electrical circuit of energy storage system

Abstract

The invention provides an energy storage system electrical circuit miniature temperature sensing automatic fire extinguishing device which comprises a fixing unit, a protection unit and a storage unit, the protection unit and the storage unit are installed on the two sides of the fixing unit respectively, the storage unit is used for storing a fire extinguishing agent, and the protection unit comprises an outer cylinder and a connecting block in the outer cylinder; the other side of the connecting block abuts against the sensing unit through the compression unit, the sensing unit is used for sensing whether a fire occurs outside or not and is installed in a limiting mode through cooperation of the outer cylinder and the fixing unit, the outer cylinder can move relative to the fixing unit, and the fixing unit, the protection unit, the compression unit and the sensing unit are all made of heat conductors. The sensing unit and the fixing unit are connected to an electrical circuit of the energy storage system through wires. The miniature temperature-sensing automatic fire extinguishing device for the electrical circuit of the energy storage system can automatically extinguish fire disasters generated in the electrical circuit without electrifying and additional energy sources, and effectively prevents the fire disasters of the electrical circuit from expanding.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire fighting and fire extinguishing, and in particular relates to a miniature temperature-sensing automatic fire extinguishing device for an electrical circuit of an energy storage system. Background Art

[0002] Energy storage is a crucial component of the Energy Internet and a key technology supporting the construction of new power systems. However, in recent years, fires caused by short circuits and overcurrent in electrical (communication) lines have become a common cause of energy storage fires. Electrical line fire monitoring devices are commonly used to detect abnormal current, temperature, and other electrical parameters that can cause electrical fire hazards. When monitoring device parameters in protected lines exceed alarm settings, they generate alarms and control signals, but they fail to promptly extinguish the fire in the abnormal line to prevent further damage. This makes monitoring ineffective and ineffective. Summary of the Invention

[0003] In view of this, the present invention aims to propose a miniature temperature-sensing automatic fire extinguishing device for the electrical circuit of an energy storage system to solve at least one of the above problems. The device does not require electricity and does not require additional energy. When a fire is sensed in the electrical circuit, the sensing unit will automatically explode and spray out the fire extinguishing agent at the same time. At the same time, the internal structure of the device is linked, so that the puncture unit punctures the storage unit, and then the storage unit sprays out the fire extinguishing agent again to autonomously extinguish the fire, effectively preventing the electrical circuit fire from spreading.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A miniature temperature-sensing automatic fire extinguishing device for the electrical circuit of an energy storage system comprises a fixed unit and protection units and storage units respectively installed on both sides thereof. The storage unit is used to store fire extinguishing agent. The protection unit comprises an outer cylinder and a connecting block inside thereof. A puncture unit is installed on one side of the connecting block. The puncture unit is used to puncture the sealing membrane of the storage unit. The other side of the connecting block contacts the sensing unit through a compression unit. The sensing unit is used to sense whether a fire occurs externally and is installed in a limited position by the outer cylinder and the fixed unit. The outer cylinder can move relative to the fixed unit. The materials of the fixed unit, protection unit, compression unit and sensing unit are all thermal conductors. The sensing unit and the fixed unit are both connected to the electrical circuit of the energy storage system through wires.

[0006] As a further solution, the storage unit includes a storage tank and a sealing film arranged above the storage tank, the storage tank is used to store the fire extinguishing agent and is sealed and stored by the sealing film.

[0007] As a further solution, a puncture channel for passing the fire extinguishing agent is provided at the center of the puncture unit.

[0008] As a further solution, the puncture unit is a puncture tube, and the thickness of the tip of the puncture tube ranges from 0.1 mm to 0.5 mm.

[0009] As a further solution, the fixing unit includes a fixing body and an inner cylinder fixedly connected to one side of the fixing body. The inner cylinder has symmetrically positioned long holes on its wall. A limiting plate is also provided at the other end of the inner cylinder. The limiting plate is annular and has a through hole No. 1 formed inside. The through hole No. 1 is used to pass through the sensing unit and limit the sensing unit.

[0010] As a further solution, the fixing unit is an integrated structure, which is convenient for integrated injection molding, thereby reducing the difficulty of production and improving production efficiency.

[0011] As a further solution, the fixed body and the inner tube are connected by welding or threading.

[0012] As a further solution, the fixed body is a hollow cylindrical structure, the interior of which is threadedly connected to the connecting unit, and a limiting ring is provided on the side close to the inner cylinder, which is used to limit the connecting unit.

[0013] As a further solution, the micro temperature-sensing automatic fire extinguishing device for the electrical circuit of the energy storage system also includes a connecting unit, which includes an upper part and a lower part of an integrated structure, the upper part is provided with an internal thread for connecting to the storage unit, and the lower part is provided with an external thread for connecting to the fixed body of the fixed unit, and a limiting step is formed at the connection between the upper and lower parts, which is used to limit the storage unit so that the sealing membrane of the storage unit is located on the inner side of the limiting step.

[0014] As a further solution, the protection unit includes an outer cylinder and a connecting block inside it. The connecting block is fixedly connected to the outer cylinder by a connecting rod. Both ends of the connecting rod extend out of the outer cylinder and are inserted into the elongated hole. The connecting rod can move axially along the elongated hole under external force. A connecting through hole is provided inside the connecting block for passing the fire extinguishing agent in the storage unit. The two sides of the connecting block are respectively connected to the puncture unit and the compression unit. The connecting through hole is connected to the puncture channel to form a fire extinguishing agent channel; the outer cylinder is sleeved on the outside of the inner cylinder, and a movable gap is provided between the two. The end of the outer cylinder away from the puncture unit is provided with a No. 2 through hole for clamping the sensing unit. The No. 2 through hole and the No. 1 through hole cooperate to enable the sensing unit to maintain balance; a number of No. 3 through holes are provided on the outer cylinder shell.

[0015] As a further solution, the connecting block is a hollow cylindrical structure, and one side is welded to the puncture unit and the other side is welded to the compression unit. The inner diameter of the connecting block is connected to the puncture channel of the puncture unit to form a fire extinguishing agent channel, which facilitates the timely spraying of the fire extinguishing agent.

[0016] As a further solution, the connecting block is a rectangular block with a through hole in the center, and one side is welded to the puncture unit and the other side is welded to the compression unit. The inner diameter of the connecting block is connected to the puncture channel of the puncture unit to form a fire extinguishing agent channel, which facilitates the timely spraying of the fire extinguishing agent.

[0017] As a further solution, the connecting block and the connecting rod are an injection-molded integral structure.

[0018] As a further solution, two symmetrical sides of the connecting block are respectively welded or threadedly connected to the connecting rod.

[0019] As a further solution, the energy storage system electrical circuit micro temperature-sensing automatic fire extinguishing device further includes an installation unit, which is connected to the fixing unit and is used to connect the fire extinguishing device to the outside.

[0020] As a further solution, the mounting unit is a clip, which is L-shaped, making it easy to clip into an external device or a wall.

[0021] As a further solution, the mounting unit is an L-shaped mounting plate with mounting holes. The mounting unit can be hung on screws of external equipment or walls through the mounting holes, or the fire extinguishing device can be connected to external equipment through bolts in conjunction with the mounting holes.

[0022] As a further solution, the compression unit is a compression spring.

[0023] As a further solution, the energy storage system electrical circuit micro temperature-sensing automatic fire extinguishing device also includes a limiting unit, one end of the limiting unit is fixedly connected to the compression unit, and the other end is in conflict with the sensing unit; a gap is formed between the compression unit and the inner cylinder.

[0024] As a further solution, the sensing unit includes an outer tube and an inner tube of an integrated structure, a protective layer is formed between the inner tube and the outer tube, the interior of the inner tube is used to store fire extinguishing agent, the surface of the outer tube is provided with a thermal conductive coating, and both ends of the outer tube are hemispherical.

[0025] As a further solution, the material of the fixing unit, the protection unit, and the compression unit is any one of copper, aluminum, iron, magnesium, graphene, and diamond.

[0026] As a further solution, the thermal conductive coating is any one of a pure copper coating, a diamond / copper composite coating, and a nano-aluminum oxide-carbon nanotube composite coating.

[0027] As a further solution, the installation unit is the dividing point, the left side is the side including the storage unit, recorded as L1, and the right side is the side including the sensing unit, recorded as L2, then the length ratio of L1:l2 ranges from 3:2-4:3, and the mass ratio is 1:1-1:2.

[0028] Compared with the prior art, the energy storage system electrical circuit miniature temperature-sensing automatic fire extinguishing device described in the present invention has the following advantages:

[0029] (1) The miniature temperature-sensing automatic fire extinguishing device for the electrical circuit of the energy storage system described in the present invention does not require electricity and does not require additional energy. When a fire is sensed in the electrical circuit, the sensing unit will automatically explode and spray out the fire extinguishing agent. At the same time, the internal structure of the device is linked so that the puncture unit punctures the storage unit, and then the storage unit sprays out the fire extinguishing agent again to extinguish the fire autonomously, effectively preventing the fire in the electrical circuit from spreading.

[0030] (2) The miniature temperature-sensing automatic fire extinguishing device for the electrical circuit of the energy storage system described in the present invention has a simple structure and is easy to install. It does not need to be connected to external equipment and can be simply installed according to the actual use location. It has strong versatility.

[0031] (3) The energy storage system electrical circuit micro temperature-sensing automatic fire extinguishing device described in the present invention stores fire extinguishing agents in both the storage unit and the sensing unit, thereby achieving the purpose of dual fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A side view of a miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to an embodiment of the present invention;

[0034] Figure 2 A cross-sectional view of a miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to an embodiment of the present invention;

[0035] Figure 3 A diagram showing the positional relationship among the protection unit, the puncture unit, and the sensing unit according to an embodiment of the present invention;

[0036] Figure 4 is a cross-sectional view of a fixing unit according to an embodiment of the present invention;

[0037] Figure 5 This is a cross-sectional view of a protection unit according to an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1-storage unit; 11-sealing membrane; 2-connecting unit; 3-fixing unit; 31-fixing body; 32-inner tube; 33-long strip hole; 34-limiting plate; 35-through hole No. 1; 36-limiting ring; 4-protection unit; 41-outer tube; 42-through hole No. 2; 43-connecting block; 44-connecting rod; 45-through hole No. 3; 5-puncture unit; 6-compression unit; 7-sensing unit; 71-outer tube; 72-inner tube; 8-limiting unit; 9-installation unit. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0044] A miniature temperature-sensing automatic fire extinguishing device for electrical circuits of energy storage systems, such as Figures 1 to 5 As shown, it includes a fixed unit 3 and a protection unit 4 and a storage unit 1 installed on both sides thereof. The storage unit 1 is used to store fire extinguishing agent. The protection unit 4 includes an outer cylinder 41 and a connecting block 43 inside it. A puncture unit 5 is installed on one side of the connecting block 43. The puncture unit 5 is used to puncture the sealing membrane of the storage unit 1 so that the fire extinguishing agent in the storage unit is sprayed out. The other side of the connecting block 43 is in contact with the sensing unit 7 through the compression unit 6. The sensing unit 7 is used to sense whether a fire occurs outside and is installed in a limited manner by the outer cylinder 41 and the fixed unit 3. The outer cylinder 41 can move relative to the fixed unit 3. The materials of the fixed unit 3, the protection unit 4, the compression unit 6 and the sensing unit 7 are all thermal conductors, which facilitates the timely transfer of heat to the sensing unit 7. The sensing unit 7 and the fixed unit are both connected to the electrical circuit of the energy storage system through wires.

[0045] The storage unit 1 includes a storage tank and a sealing film 11 disposed above the storage tank. The storage tank is used to store the fire extinguishing agent and is sealed and stored by the sealing film 11. The type of fire extinguishing agent can be changed according to the specific application scenario.

[0046] A puncture channel for passing the fire extinguishing agent is provided at the center of the puncture unit 5 .

[0047] In some embodiments, the puncture unit 5 is a puncture tube, which is used to puncture the sealing membrane 11 so that the fire extinguishing agent in the storage tank is sprayed out along the puncture tube.

[0048] In some embodiments, in order to ensure that the puncture unit 5 can quickly puncture the sealing film, the puncture tube is made of metal. Preferably, the metal is made of copper, aluminum or stainless steel, and the thickness of the tip ranges from 0.1 mm to 0.5 mm.

[0049] A miniature temperature-sensing automatic fire extinguishing device for an electrical circuit of an energy storage system further includes a connecting unit 2 , which is used to connect the storage unit 1 and the fixing unit 3 .

[0050] In some embodiments, the connecting unit 2 includes an upper part and a lower part of an integral structure, the upper part is provided with an internal thread for connecting to the storage unit 1, and the lower part is provided with an external thread for connecting to the fixed body 31 of the fixed unit 3, and a limiting step is formed at the connection between the upper and lower parts, which is used to limit the storage unit 1 so that the sealing membrane 11 of the storage unit 1 is located exactly on the inner side of the limiting step.

[0051] Since the storage unit 1 contains fire extinguishing agent, which needs to be inspected and replaced regularly, the connecting unit 2 and the storage unit 1 are connected by threads for easy maintenance and replacement, and the mounting unit 9 is connected to the outside. When maintenance or replacement is required, the storage unit 1 can be directly unscrewed without removing the entire fire extinguishing device. This effectively prevents the device from becoming loose due to frequent removal, and also prevents damage to the sensing unit 7.

[0052] The fixing unit 3 includes a fixing body 31 and an inner cylinder 32 fixedly connected to one side thereof. The inner cylinder 32 has a wall provided with symmetrically positioned long strip holes 33. The other end of the inner cylinder 32 is also provided with a limiting plate 34. The limiting plate 34 is annular and has a No. 1 through hole 35 formed inside. The No. 1 through hole 35 is used to pass through the sensing unit 7 and limit the sensing unit 7 so that the sensing unit 7 can maintain balance under the joint action of the No. 1 through hole 35 and the No. 2 through hole 42.

[0053] In some embodiments, the fixing unit 3 is an integrated structure, which facilitates integrated injection molding, thereby reducing the difficulty of production and improving production efficiency.

[0054] In some embodiments, the fixing body 31 and the inner cylinder 32 are connected by welding or threading.

[0055] In some embodiments, the fixed body 31 is a hollow cylindrical structure, internally threadedly connected to the connecting unit 2. A retaining ring 36 is provided on the side near the inner tube 32 to limit the position of the connecting unit 2. When the retaining ring 36 limits the position of the connecting unit 2, the connecting unit also limits the position of the storage unit 1. This dual position limiting mechanism effectively ensures that the sealing membrane 11 of the storage unit 1 maintains a safe distance from the puncture unit 5, preventing the storage unit 1 from being punctured by the puncture unit 5 during the manufacturing process of the automatic fire extinguishing device of the present invention, causing the fire extinguishing agent in the storage unit 1 to be sprayed out.

[0056] The protection unit 4 includes an outer cylinder 41 and a connecting block 43 inside the outer cylinder 41. The connecting block 43 is fixedly connected to the outer cylinder 41 by a connecting rod 44. Both ends of the connecting rod 44 extend out of the outer cylinder 41 and are inserted into the elongated hole 31. Under external force, it can move axially along the elongated hole 31. A connecting through hole is provided inside the connecting block 43 for passing the fire extinguishing agent in the storage unit 1. The two sides of the connecting block 43 are respectively connected to the puncture unit 5 and the compression unit 6. The connecting through hole is connected to the puncture channel to form a fire extinguishing agent channel, which facilitates the timely spraying of the fire extinguishing agent; the outer cylinder 41 is a cylindrical shell structure with an opening on one side, and is sleeved on the outside of the inner cylinder 32. A movable gap is provided between the two for relative movement. A second through hole 42 is provided at the end of the outer cylinder 41 away from the puncture unit 5. The second through hole 42 is used to clamp the sensing unit 7, and the second through hole 42 and the first through hole cooperate so that the sensing unit 7 can maintain balance under the joint action of the first through hole 35 and the second through hole 42.

[0057] In some embodiments, in order to facilitate the timely discharge of the fire extinguishing agent to the outside of the fire extinguishing device for fire extinguishing, a plurality of No. 3 through holes 45 are provided on the shell of the outer cylinder 41 .

[0058] In some embodiments, the connecting block 43 is a hollow cylindrical structure, and one side is welded to the puncture unit 5 and the other side is welded to the compression unit 6. The inner diameter of the connecting block 43 is connected to the puncture channel of the puncture unit 5 to form a fire extinguishing agent channel, which facilitates the timely spraying of the fire extinguishing agent.

[0059] In other embodiments, the connecting block 43 is a rectangular block with a through hole at the center, and one side is welded to the puncture unit 5 and the other side is welded to the compression unit 6. The inner diameter of the connecting block 43 is connected to the puncture channel of the puncture unit 5 to form a fire extinguishing agent channel, which facilitates the timely spraying of the fire extinguishing agent.

[0060] In some embodiments, the connecting block 43 and the connecting rod 44 are an integral injection-molded structure.

[0061] In other embodiments, two symmetrical sides of the connecting block 43 are respectively welded or threadedly connected to the connecting rod 44 .

[0062] A miniature temperature-sensing automatic fire extinguishing device for an electrical circuit of an energy storage system further includes an installation unit 9 , which is welded to a fixing unit 3 , and is used to connect the fire extinguishing device to the outside.

[0063] In some embodiments, the mounting unit 9 is a clip, which is L-shaped, making it easy to connect to an external device or a wall.

[0064] In other embodiments, the mounting unit 9 is an L-shaped mounting plate with mounting holes. The mounting unit 9 can be hung on screws of an external device or a wall through the mounting holes, or the fire extinguishing device can be connected to the external device through bolts in conjunction with the mounting holes.

[0065] The compression unit 6 is a compression spring.

[0066] The materials of the fixing unit 3 , the protection unit 4 , and the compression unit 6 are all metal materials with fast thermal conductivity, such as copper, aluminum, iron, or magnesium, or ultra-high thermal conductivity materials, such as graphene and diamond.

[0067] In order to ensure the stability of the fire extinguishing device during vertical installation, the installation unit 9 is used as the dividing point, the left side is the side including the storage unit 1, recorded as L1, and the right side is the side including the sensing unit 7, recorded as L2, then the length ratio of L1:l2 is in the range of 3:2-4:3.

[0068] In some embodiments, the length of L1 is 24 cm and the length of L2 is 17 cm.

[0069] In other embodiments, the length of L1 is 36 cm and the length of L2 is 20 cm.

[0070] A miniature temperature-sensing automatic fire extinguishing device for electrical circuits in an energy storage system also includes a limiting unit 8, one end of which is fixedly connected to the compression unit 6 and the other end of which contacts the sensing unit 7. A gap is formed between the compression unit 6 and the inner tube 32, allowing the limiting unit 8 to cooperate with the inner tube 32 to provide a limiting function while also avoiding friction with the inner tube 32.

[0071] In some embodiments, the cross-section of the limiting unit 8 is a hollow conical structure, and the upper bottom surface of the conical cone (i.e., the side with a smaller radius) is welded to the compression unit 6, the lower bottom surface of the conical cone is in contact with the sensing unit 7, and the diameter of the lower bottom surface of the conical cone is larger than the outer diameter of the No. 1 through hole 35, effectively ensuring that the limiting unit 8 is always located in the inner cylinder 32.

[0072] In other embodiments, the limiting unit 8 is an inclined plate, and multiple inclined plates are evenly welded on the compression unit 6 to form a trumpet-shaped structure opening outward. One end of the trumpet-shaped structure is used to be connected to the sensing unit 7, and the outer diameter of the maximum opening is larger than the outer diameter of the No. 1 through hole 35.

[0073] The working principle of the limit unit 8 is:

[0074] After the induction unit 7 explodes, the limiting unit 8 moves to the right under the elastic force of the compression unit 6 until the limiting unit 7 contacts the limiting plate 34 of the inner cylinder 32. At this time, the limiting unit 8 stops moving, that is, the inner cylinder 32 and the outer cylinder 41 are relatively stationary.

[0075] The sensing unit 7 comprises an outer tube 71 and an inner tube 72, each formed as a single unit. A protective layer forms between the inner and outer tubes 72 and 72, while the inner tube 73 stores the fire extinguishing agent. The outer tube 71 is coated with a thermally conductive coating, and both ends of the outer tube are hemispherical, which helps to disperse the stress of the fire-extinguishing glass ball.

[0076] In one embodiment, the thermal conductive coating is any one of a pure copper coating, a diamond / copper composite coating, and a nano-aluminum oxide-carbon nanotube composite coating.

[0077] Pure copper coating has extremely high thermal conductivity, ranking among the best among all metals, and can conduct heat quickly. It is usually prepared using cold spraying, thermal spraying and other technologies. Diamond / copper composite coating: combines the ultra-high thermal conductivity of diamond with the good electrical conductivity and ductility of copper. Diamond particles form a thermal conductive network in the copper matrix, which greatly improves the thermal conductivity of the coating while maintaining some of the excellent properties of copper. It is suitable for high-end electronic devices, aerospace and other fields that require extremely high thermal conductivity. Nano-alumina-carbon nanotube composite coating: It is prepared by thermal spraying and other technologies using the high hardness and high temperature resistance of nano-alumina and the ultra-high thermal conductivity and high strength of carbon nanotubes. This coating not only has good thermal conductivity, but also has certain wear resistance and corrosion resistance. It can be used in mechanical parts, chemical equipment and other fields.

[0078] In some embodiments, the fire extinguishing agent stored in inner tube 73 is perfluorohexanone, which has a boiling point of approximately 49°C. This low boiling point allows it to vaporize easily. When a fire occurs externally and the temperature is too high, it quickly transfers the heat to sensing unit 7, causing it to vaporize rapidly and explode.

[0079] Perfluorohexanone is chemically stable and resistant to decomposition at room temperature and conventional fire extinguishing temperatures (<400°C). At high temperatures (>600°C), it may decompose to produce small amounts of toxic gases such as hydrogen fluoride (HF), but the concentration of these decomposition products is below safety thresholds. As an inert compound, it does not react chemically with common materials such as metals, plastics, and rubber, and is non-corrosive to equipment. It does not support combustion and is non-flammable, exhibiting excellent flame retardancy. Its high dielectric strength, approximately 25kV / mm, makes it an ideal fire extinguishing agent for electrical equipment, leaving no residue after extinguishing a fire and not affecting normal equipment operation. It is difficult to degrade in the natural environment, but it evaporates rapidly, with an atmospheric lifetime of approximately 5 days, and does not persist in ecosystems for long periods of time.

[0080] The working principle of a miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system is as follows:

[0081] The materials of the fixed unit 3, the protection unit 4, the compression unit 6 and the induction unit 7 are all thermal conductors, which facilitates the timely transfer of heat to the induction unit 7. The induction unit 7 and the fixed unit are connected to the electrical circuit of the energy storage system through wires. When a fire occurs somewhere in the electrical circuit, the wires will transfer the heat to the surface of the fixed unit 3, the protection unit 4, the compression unit 6 and the induction unit 7 in a timely manner. The fixed unit 3, the protection unit 4, the compression unit 6 will transfer the heat to the induction unit 7 through the part in contact with the induction unit 7. During the temperature rise process, the perfluorohexanone in the inner tube 73 of the induction unit 7 quickly vaporizes after reaching the boiling point. As the temperature rises, the induction unit 7 In response to the explosion of the response unit 7 to extinguish the fire, the fixed unit 3 and the protection unit 4 move relative to each other, and the compression unit 6 undergoes elastic deformation. Since the fixed unit 3 is in a fixed state, the outer cylinder 41 moves along the inner cylinder 42 toward the fixed body 31 (moving to the left according to the positional relationship in the accompanying drawings). At this time, the connecting rod 44 moves to the left along the long hole 33. The connecting rod 44 drives the puncture unit 5 to move to the left through the connecting block 43 to puncture the sealing membrane. At this time, the fire extinguishing agent inside the storage unit 1 is discharged through the fire extinguishing agent channel, and then will be sprayed out from the fire extinguishing device through the No. 3 through hole 45, the No. 1 through hole 35 and the No. 2 through hole 42 and other gaps to automatically extinguish the fire.

[0082] The energy storage system electrical circuit micro temperature-sensing automatic fire extinguishing device of the present invention does not require electricity and does not require additional energy. When a fire is sensed in the electrical circuit, the sensing unit will automatically explode and spray out the fire extinguishing agent. At the same time, the internal structure of the device is linked, so that the puncture unit punctures the storage unit, and then the storage unit sprays out the fire extinguishing agent again to autonomously extinguish the fire, effectively preventing the electrical circuit fire from spreading.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system, characterized by: It includes a fixed unit and a protection unit and a storage unit installed on both sides thereof. The storage unit is used to store fire extinguishing agent. The protection unit includes an outer cylinder and a connecting block inside it. A puncture unit is installed on one side of the connecting block. The puncture unit is used to puncture the sealing membrane of the storage unit. The other side of the connecting block is in contact with the sensing unit through the compression unit. The sensing unit is used to sense whether a fire occurs outside and is installed in a limited manner by the outer cylinder and the fixed unit. The outer cylinder can move relative to the fixed unit. The materials of the fixed unit, protection unit, compression unit and sensing unit are all thermal conductors. The sensing unit and the fixed unit are connected to the electrical circuit of the energy storage system through wires.

2. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 1, characterized in that: The storage unit comprises a storage tank and a sealing film arranged above the storage tank. The storage tank is used to store the fire extinguishing agent and is sealed and stored by the sealing film.

3. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 1, characterized in that: The puncture unit is a puncture tube, and the thickness of the tip of the puncture tube ranges from 0.1 mm to 0.5 mm.

4. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 2, characterized in that: The fixing unit includes a fixing body and an inner cylinder fixedly connected to one side thereof. The inner cylinder wall is provided with symmetrically positioned long holes. A limiting plate is also provided at the other end of the inner cylinder. The limiting plate is annular and has a No. 1 through hole formed inside. The No. 1 through hole is used to pass through the sensing unit and limit the sensing unit.

5. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 4, characterized in that: It also includes a connecting unit, which includes an upper part and a lower part of an integral structure, the upper part is provided with an internal thread for connecting to the storage unit, and the lower part is provided with an external thread for connecting to the fixed body of the fixed unit, and a limiting step is formed at the connection between the upper and lower parts, which is used to limit the storage unit so that the sealing membrane of the storage unit is located on the inner side of the limiting step.

6. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 4, characterized in that: The protection unit includes an outer cylinder and a connecting block inside it. The connecting block is fixedly connected to the outer cylinder by a connecting rod. Both ends of the connecting rod extend out of the outer cylinder and are inserted into the elongated hole. The connecting rod can move axially along the elongated hole under external force. A connecting through hole is provided inside the connecting block for passing the fire extinguishing agent in the storage unit. The two sides of the connecting block are respectively connected to the puncture unit and the compression unit. The connecting through hole is connected to the puncture channel to form a fire extinguishing agent channel; the outer cylinder is sleeved on the outside of the inner cylinder, and a movable gap is provided between the two. A No. 2 through hole is provided at the end of the outer cylinder away from the puncture unit for clamping the sensing unit. The No. 2 through hole and the No. 1 through hole cooperate to enable the sensing unit to maintain balance; a number of No. 3 through holes are provided on the outer cylinder shell.

7. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 6, characterized in that: It also includes an installation unit, which is connected to the fixing unit and is used to connect the fire extinguishing device to the outside. The installation unit serves as a dividing point, the left side is the side including the storage unit, recorded as L1, and the right side is the side including the sensing unit, recorded as L2. The length ratio of L1:l2 is in the range of 3:2-4:

3.

8. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 6, characterized in that: It also includes a limiting unit, one end of which is fixedly connected to the compression unit, and the other end of which is in conflict with the sensing unit; a gap is formed between the compression unit and the inner cylinder.

9. The energy storage system electrical circuit miniature temperature-sensing automatic fire extinguishing device according to claim 1, characterized in that: The sensing unit includes an outer tube and an inner tube of an integrated structure. A protective layer is formed between the inner tube and the outer tube. The interior of the inner tube is used to store fire extinguishing agent. The surface of the outer tube is provided with a thermal conductive coating, and both ends of the outer tube are hemispherical.

10. The miniature temperature-sensing automatic fire extinguishing device for electrical circuits of an energy storage system according to claim 1, characterized in that: The material of the fixing unit, the protection unit and the compression unit is any one of copper, aluminum, iron, magnesium, graphene and diamond.

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