energy storage system

Abstract

The utility model relates to the technical field of energy storage, disclose an energy storage system, include: box, explosion -proof valve is located the box, fire control pipeline at least partial intrudes into to the box and forms the fusible end, the fusible end is close to the explosion -proof valve setting. The utility model will set up the fusible end of fire control pipeline near the explosion -proof valve, when the heat runaway occurs, high temperature and high pressure gas causes the pressure to rise in the box, when the air pressure in the box reaches the explosion -proof valve opening threshold, the explosion -proof valve opens, and high temperature and high pressure gas spouts from the explosion -proof valve to the box, at this moment, the fusible end located in the explosion -proof valve front melts rapidly under the action of high temperature and high pressure gas, and the fire control medium bursts through the blocking of the fusible end and spouts, and fills the box rapidly, makes the temperature in the box reduce rapidly, thereby avoided the further spread of heat runaway, avoided the influence of surrounding other components or the box, and the fire extinguishing mode is simple and reliable.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and specifically to energy storage systems. Background Technology

[0002] With the rapid development of the new energy industry, energy storage devices are being used more and more widely in the energy sector. However, the safety issues of energy storage devices are also becoming increasingly prominent, with fire protection being particularly important. Traditional fire protection for energy storage packs typically relies on sensors to detect the temperature or flammable gas concentration inside the enclosure. When a threshold is reached, the fire suppression pipeline valves are opened to inject extinguishing agents for fire suppression and cooling. Since these sensors may not be used for extended periods, their reliability is difficult to test. A sensor malfunction will lead to fire suppression failure, resulting in low reliability of the fire suppression method. Utility Model Content

[0003] In view of this, the present invention provides an energy storage system to solve the problem of low reliability of fire extinguishing methods in existing energy storage systems.

[0004] This utility model provides an energy storage system, including: a housing; an explosion-proof valve disposed on the housing; and a fire-fighting pipeline, at least partially extending into the housing and forming a fusible end, the fusible end being disposed near the explosion-proof valve.

[0005] Beneficial effects: By placing the fusible end of the fire-fighting pipeline near the explosion-proof valve, in the event of thermal runaway, the high-temperature and high-pressure gas causes the pressure inside the chamber to rise. When the gas pressure inside the chamber reaches the opening threshold of the explosion-proof valve, the explosion-proof valve opens, and the high-temperature and high-pressure gas is ejected from the explosion-proof valve to the outside of the chamber. At this time, the fusible end located in front of the explosion-proof valve melts rapidly under the action of the high-temperature and high-pressure gas, and the fire-fighting medium breaks through the seal of the fusible end and gushes out, quickly filling the chamber and causing the temperature inside the chamber to drop rapidly. This prevents further spread of thermal runaway and avoids affecting other surrounding components or the chamber itself. The fire extinguishing method is simple and reliable.

[0006] In one optional embodiment, the side of the housing where the explosion-proof valve is installed is a first wall surface. An installation range surface is formed on the first wall surface with the center of the explosion-proof valve as the center and r as the radius, where the value of r satisfies r≤50mm. The orthographic projection of the fusible end on the first wall surface falls within the installation range surface.

[0007] Beneficial effects: Avoids excessive distance between the fusible end and the explosion-proof valve, and increases the melting rate of the fusible end during thermal runaway.

[0008] In one alternative embodiment, the distance between the fusible end and the mounting area surface in the direction perpendicular to the first wall surface is d, satisfying 0 < d ≤ 100 mm.

[0009] Beneficial effects: Avoids excessive distance between the fusible end and the explosion-proof valve, and increases the melting rate of the fusible end during thermal runaway.

[0010] In one optional embodiment, the fire-fighting pipeline includes a pipeline body and a fusible nozzle, wherein the fusible nozzle is connected to one end of the pipeline body located inside the housing.

[0011] In one optional embodiment, several boxes are arranged in a row, and each box is equipped with the explosion-proof valve and the fire-fighting pipeline.

[0012] In one optional embodiment, the pipeline body includes a main pipeline and branch pipelines. The main pipeline is located outside a plurality of the boxes and is adapted to connect to the fire-fighting medium. A plurality of branch pipelines are provided, each of which is connected to the main pipeline and extends into a plurality of the boxes. The fusible nozzle is connected to the end of the branch pipeline located inside the box.

[0013] In one alternative embodiment, the fire-fighting pipeline further includes a switching valve disposed on the main pipeline.

[0014] In one alternative implementation, the meltable nozzle is a hot melt nozzle.

[0015] Beneficial effects: The high temperature of the gas allows the fusible nozzle to melt rapidly, making it simple and reliable.

[0016] In one alternative embodiment, the explosion-proof valve is disposed on the side wall of the enclosure and positioned vertically above the side wall.

[0017] Beneficial effects: By placing the explosion-proof valve in a high position, the fire-fighting medium can be positioned high enough to submerge the components inside the enclosure, thus ensuring effective fire suppression.

[0018] In one alternative embodiment, the energy storage system further includes a battery unit disposed within the housing. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an energy storage system according to an embodiment of the present invention; Figure 2 for Figure 1 The image shows the front view of the energy storage system. Figure 3 for Figure 2 Partial cross-sectional view of the medium-capacity energy storage system along the AA direction; Figure 4 for Figure 3 Partial cross-sectional view of the medium-capacity energy storage system in the BB direction.

[0021] Explanation of reference numerals in the attached figures: 1. Enclosure; 11. First wall surface; 111. Installation area surface; 2. Explosion-proof valve; 3. Fire protection pipeline; 31. Pipeline body; 311. Main pipeline; 312. Branch pipeline; 32. Fusible nozzle; 33. Switch valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0024] According to an embodiment of the present invention, an energy storage system is provided, comprising: a housing 1; an explosion-proof valve 2 disposed on the housing 1; and a fire-fighting pipeline 3, at least partially extending into the housing 1 and forming a fusible end, the fusible end being disposed near the explosion-proof valve 2.

[0025] In the energy storage system of this embodiment, the fusible end of the fire-fighting pipeline 3 is located near the explosion-proof valve 2. When thermal runaway occurs, the high-temperature and high-pressure gas causes the pressure inside the box 1 to rise. When the gas pressure inside the box 1 reaches the opening threshold of the explosion-proof valve 2, the explosion-proof valve 2 opens, and the high-temperature and high-pressure gas is ejected from the explosion-proof valve 2 to the outside of the box 1. At this time, the fusible end located in front of the explosion-proof valve 2 melts rapidly under the action of the high-temperature and high-pressure gas. The fire-fighting medium breaks through the blockage of the fusible end and gushes out, quickly filling the box 1, causing the temperature inside the box 1 to drop rapidly, thereby preventing the further spread of thermal runaway and preventing other surrounding components or the box 1 from being affected. The fire extinguishing method is simple and reliable.

[0026] It is worth noting that in the relevant technology, a sensor is used to sense the temperature or concentration of combustible gas inside the enclosure 1. However, if the sensor is installed in a fixed position, when a cell in the battery pack heats up or catches fire, the heat generated is not enough to raise the air temperature in the entire space to the trigger temperature of the sprinkler head. In other words, the existing sprinkler head cannot meet the requirements for precise cooling and fire extinguishing of specific objects such as energy storage battery packs in terms of triggering method.

[0027] In the energy storage system of this embodiment, the operation of the fire-fighting pipeline 3 does not rely on sensors. As long as thermal runaway occurs inside the box 1, the fusible end can be melted to extinguish the fire in time, making the fire-fighting more reliable.

[0028] It is worth noting that fire-fighting pipeline 3 is connected to the fire-fighting medium storage container. The fire-fighting medium can be water, or other liquids, gases, or solids (such as powders, granules, etc.) that can cool and extinguish fires.

[0029] Furthermore, in one embodiment, such as Figure 4 As shown, the side of the housing 1 where the explosion-proof valve 2 is installed is the first wall surface 11. An installation range surface 111 is formed on the first wall surface 11 with the center of the explosion-proof valve 2 as the center and radius r as the radius. The value of r satisfies r ≤ 50 mm. The orthographic projection of the fusible end onto the first wall surface 11 falls within the installation range surface 111. This design avoids the fusible end being too far from the explosion-proof valve 2, thereby increasing the melting rate of the fusible end in the event of thermal runaway.

[0030] It should be noted that the fusible end has a fusible portion and may also have a non-fusible portion (e.g., for mounting and supporting the fusible portion). The orthogonal projection of the fusible portion of the fusible end onto the first wall surface 11 should fall within the mounting range surface 111.

[0031] Furthermore, in one embodiment, such as Figure 4 As shown, in the direction perpendicular to the first wall surface 11, the distance between the fusible end and the installation area surface 111 is d, which satisfies 0 < d ≤ 100 mm. This setting avoids the fusible end being too far from the explosion-proof valve 2, thereby increasing the melting rate of the fusible end in the event of thermal runaway.

[0032] It should be noted that the fusible end has a fusible portion and may also have a non-fusible portion (e.g., for mounting support of the fusible portion). The distance between the fusible portion of the fusible end and the mounting surface 111 should be at least d.

[0033] It is worth noting that by limiting the distance between the fusible end and the explosion-proof valve 2, the fusible end can be located near the front of the explosion-proof valve 2, further improving the reliability of fire extinguishing.

[0034] In one embodiment, such as Figure 3and Figure 4 As shown, the fire-fighting pipeline 3 includes a pipeline body 31 and a fusible nozzle 32, with the fusible nozzle 32 connected to one end of the pipeline body 31 located inside the housing 1. Therefore, the fusible nozzle 32 can serve as the fusible end.

[0035] Furthermore, the fusible nozzle 32 can be detachably connected to the pipeline body 31, which facilitates the maintenance and replacement of the fusible nozzle 32.

[0036] In one embodiment, such as Figure 1 and Figure 2 As shown, several enclosures 1 are arranged in a row, and each enclosure 1 is equipped with an explosion-proof valve 2 and a fire-fighting pipeline 3. Therefore, each enclosure 1 can be fire-fighted independently, reducing losses and preventing the spread of heat runaway from affecting other enclosures 1.

[0037] It is worth noting that several boxes 1 can be stacked vertically and / or arranged side by side horizontally.

[0038] Furthermore, in one embodiment, such as Figure 1 and Figure 2 As shown, the main pipeline 31 includes a main pipeline 311 and branch pipelines 312. The main pipeline 311 is located outside several boxes 1 and is suitable for connecting fire-fighting media. Several branch pipelines 312 are provided, and each branch pipeline 312 is connected to the main pipeline 311. The branch pipelines 312 extend into several boxes 1 respectively. The fusible nozzle 32 is connected to the end of the branch pipeline 312 located inside the box 1.

[0039] It is worth noting that, such as Figure 1 and Figure 2 As shown, the main pipeline 311 extends along the arrangement direction of several boxes 1. The first end of the branch pipeline 312 is connected to the main pipeline 311, and the second end of the branch pipeline 312 extends into the corresponding box 1. The fusible nozzle 32 is connected to the second end of the branch pipeline 312. Specifically, in this embodiment, several boxes 1 are stacked vertically. Therefore, the main pipeline 311 extends vertically, and the lower end of the main pipeline 311 forms the fire-fighting medium inlet.

[0040] In one embodiment, such as Figure 1 As shown, the fire protection pipeline 3 also includes a switch valve 33, which is installed on the main pipeline 311. Furthermore, the switch valve 33 is installed near the fire protection medium inlet end of the main pipeline 311.

[0041] Understandably, the switch valve 33 is a normally open valve. When thermal runaway does not occur, the fusible nozzle 32 remains sealed off the main pipeline 31. In the event of thermal runaway, the fusible nozzle 32 melts, allowing the fire-fighting medium to enter the housing 1 through the main pipeline 311 and the corresponding branch pipeline 312 of the thermal runaway housing 1 for fire suppression. When maintenance of the energy storage system is required, the switch valve 33 can be closed.

[0042] In one embodiment, the fusible nozzle 32 is a thermal fusion nozzle. The high temperature of the gas allows the fusible nozzle 32 to melt rapidly, making it simple and reliable.

[0043] Specifically, the hot melt nozzle can be a metal hot melt nozzle or a glass hot melt nozzle.

[0044] As an alternative implementation, the meltable nozzle 32 can also be a nozzle that opens under high pressure.

[0045] In one embodiment, such as Figure 3 and Figure 4 As shown, the explosion-proof valve 2 is installed on the side wall of the enclosure 1 and is positioned vertically near the top of the side wall. By placing the explosion-proof valve 2 at a high position, the fire-fighting medium can be introduced into the enclosure 1, ensuring a sufficiently high fire-fighting water level to submerge the components inside the enclosure 1 and guaranteeing effective fire suppression.

[0046] It is worth noting that when the high-temperature and high-pressure gas ruptures the explosion-proof valve 2, it is equivalent to forming an opening in the housing 1. If the explosion-proof valve 2 is installed too low on the side wall of the housing 1, the fire-fighting medium will flow out through the opening formed by the explosion-proof valve 2, and the water level of the fire-fighting medium in the housing 1 will not reach the height to submerge the battery unit, affecting the fire-fighting effect.

[0047] It should be noted that the enclosure 1 is usually a rectangular structure, and the side walls are the four peripheral walls that surround the bottom wall and / or the top wall. The explosion-proof valve 2 can be installed on one of the peripheral walls.

[0048] In one embodiment, the energy storage system further includes battery cells disposed within the housing 1. Furthermore, each housing 1 may contain a plurality of battery cells.

[0049] When the battery cell inside the enclosure 1 experiences thermal runaway, high-temperature and high-pressure gas is ejected from the battery cell, causing the gas pressure inside the enclosure 1 to rise. When the gas pressure inside the enclosure 1 reaches the opening threshold of the explosion-proof valve 2, the high-temperature and high-pressure gas breaks through the explosion-proof valve 2 and is ejected from the explosion-proof valve 2 out of the enclosure 1. As the high-temperature and high-pressure gas flows toward the explosion-proof valve 2, it can quickly melt the fusible nozzle 32 located in front of the explosion-proof valve 2 to remove the blockage on the main body of the pipeline 31. The switch valve 33 is in the open state, and the fire-fighting medium is ejected from the melted fusible nozzle 32 and quickly fills the entire enclosure 1, submerging the battery cell and causing the temperature inside the enclosure 1 to drop rapidly, preventing the occurrence of heat spread.

[0050] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An energy storage system, characterized in that, include: Box (1); An explosion-proof valve (2) is installed on the housing (1); The fire-fighting pipe (3) extends at least partially into the housing (1) and forms a fusible end, which is located near the explosion-proof valve (2).

2. The energy storage system according to claim 1, characterized in that, The side of the housing (1) on which the explosion-proof valve (2) is installed is the first wall surface (11). An installation range surface (111) is formed on the first wall surface (11) with the center of the explosion-proof valve (2) as the center and r as the radius. The value of r satisfies r≤50mm. The orthographic projection of the fusible end on the first wall surface (11) falls into the installation range surface (111).

3. The energy storage system according to claim 2, characterized in that, In the direction perpendicular to the first wall surface (11), the distance between the fusible end and the mounting range surface (111) is d, which satisfies 0 < d ≤ 100 mm.

4. The energy storage system according to any one of claims 1 to 3, characterized in that, The fire-fighting pipeline (3) includes a pipeline body (31) and a fusible nozzle (32), wherein the fusible nozzle (32) is connected to one end of the pipeline body (31) located inside the box (1).

5. The energy storage system according to claim 4, characterized in that, The enclosures (1) are arranged in a plurality of units, and each enclosure (1) is provided with an explosion-proof valve (2) and a fire-fighting pipeline (3).

6. The energy storage system according to claim 5, characterized in that, The main pipeline (31) includes a main pipeline (311) and branch pipelines (312). The main pipeline (311) is located outside of several boxes (1) and is suitable for connecting fire-fighting media. Several branch pipelines (312) are provided, and each branch pipeline (312) is connected to the main pipeline (311). The branch pipelines (312) extend into several boxes (1) respectively. The fusible nozzle (32) is connected to the end of the branch pipeline (312) located inside the box (1).

7. The energy storage system according to claim 6, characterized in that, The fire-fighting pipeline (3) also includes a switch valve (33), which is located on the main pipeline (311).

8. The energy storage system according to claim 4, characterized in that, The fusible nozzle (32) is a hot melt nozzle.

9. The energy storage system according to any one of claims 1 to 3, characterized in that, The explosion-proof valve (2) is disposed on the side wall of the housing (1) and is positioned vertically above the side wall.

10. The energy storage system according to any one of claims 1 to 3, characterized in that, The energy storage system also includes a battery unit, which is disposed inside the housing (1).

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