An explosion vent panel for an energy storage power station with an integrated active ignition device

Abstract

The present invention discloses a pressure relief panel for an energy storage power station with an integrated active ignition device, which includes an energy storage power station box body and an integrated ignition device. The outside of the integrated ignition device is provided with heat-insulating cotton, and a square groove is provided at the center of the heat-insulating cotton. The integrated ignition device is embedded in the square groove of the heat-insulating cotton. The outside of the heat-insulating cotton is sleeved with a heat-insulating cotton cover, and an opening matching the shape of the integrated ignition device is provided at the center of the bottom of the heat-insulating cotton cover; the present invention has the characteristics of compact structure. The controller, hydrogen sensor and backup battery are integrated inside the integrated ignition device and installed inside the pressure relief panel, which will not occupy additional space in the energy storage power station, thus reducing the installation space of the pressure relief panel of the energy storage power station. In addition, when the integrated ignition device fails to actively open and release pressure, the pressure relief panel still has a passive pressure relief function.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery safety, and specifically to a pressure relief panel for an energy storage power station with an integrated active ignition device. Background Art

[0002] With the vigorous development of the new energy industry, the installed capacity of energy storage power stations based on lithium-ion batteries has increased year by year and has become the main force of new energy storage technologies. However, due to factors such as overcharging, overheating, or impact, lithium batteries may experience thermal runaway accidents, and a large amount of combustible gas will accumulate inside the energy storage power station, causing an explosion hazard to the energy storage power station.

[0003] In order to prevent greater harm caused by explosion accidents, pressure relief panels are generally installed in energy storage power stations for pressure relief. The pressure relief panel is a passive pressure relief device. When the internal pressure of the energy storage power station reaches the opening pressure of the pressure relief panel, the pressure relief panel will be forced to open to direct the release of the internal pressure of the pressure vessel, thereby ensuring the integrity of the cabinet and reducing the harm to surrounding equipment and personnel. However, this pressure relief method still has two major drawbacks. First, the design of the completely passive pressure relief panel needs to meet the pressure relief under the maximum explosion power, which will require a large number of pressure relief panels in the energy storage power station. This will not only increase the cost of energy storage equipment, but also the structure of the energy storage container is very compact, making it difficult to arrange such a large number of pressure relief devices. Second, if there is no ignition source and the energy storage power station does not explode, the pressure relief port will not open, and a large amount of combustible gas will accumulate inside the energy storage power station, making the energy storage power station a "time bomb" with major safety hazards and seriously endangering the safety of surrounding personnel and equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressure relief panel for an energy storage power station with an integrated active ignition device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A pressure relief panel for an energy storage power station with an integrated active ignition device, including an energy storage power station box body and an integrated ignition device. The outside of the integrated ignition device is provided with heat insulation cotton, and a square groove is provided at the center of the heat insulation cotton. The integrated ignition device is embedded in the square groove of the heat insulation cotton. The outside of the heat insulation cotton is sleeved with a heat insulation cotton cover. An opening matching the shape of the integrated ignition device is provided at the center of the bottom of the heat insulation cotton cover. A strength film is provided at the top of the heat insulation cotton, and sealing components are bonded to the top of the strength film and the bottom of the heat insulation cotton cover. The sealing components are embedded in the top of the energy storage power station box body.

[0006] Preferably, the integrated ignition device internally includes a controller, a transformer, a backup battery, and a hydrogen sensor, and an ignition electrode is installed outside the integrated ignition device.

[0007] Preferably, the sealing assembly includes an upper sealing gasket and a lower sealing gasket. The upper sealing gasket is attached to the top of the strength film, and the lower sealing gasket is attached to the bottom of the heat-insulating cotton cover.

[0008] Preferably, threaded holes are provided near the edges at the top of the heat-insulating cotton cover, the strength film, the upper sealing gasket, and the lower sealing gasket. A first bolt is provided in the threaded hole of the upper sealing gasket, and the bottom end of the first bolt sequentially passes through the threaded holes in the strength film, the heat-insulating cotton cover, and the lower sealing gasket.

[0009] Preferably, the hydrogen sensor is signal-connected to the controller, and the controller is electrically connected to the backup battery, the transformer, and the ignition electrode.

[0010] Preferably, the heat-insulating cotton cover is threadedly connected to the bottom of the integrated ignition device by a second bolt.

[0011] Preferably, the bottom end of the first bolt passes through the energy storage power station box body, and a fastening nut is threadedly connected to the bottom end of the first bolt.

[0012] Preferably, a U-shaped gap is provided at the top of the strength film.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] First, the present invention has the characteristic of a compact structure. The controller, the hydrogen sensor, and the backup battery are integrated inside the integrated ignition device and installed inside the explosion vent panel, without occupying additional space in the energy storage power station, thereby saving the installation space of the explosion vent panel in the energy storage power station.

[0015] Second, during the use of the explosion vent panel provided by the present invention, when the integrated ignition device fails and cannot actively open to release pressure, and when the internal pressure of the energy storage power station is too high, the strength film will rupture or deform due to pressure changes, and the explosion vent panel will be opened passively to release pressure, so that the explosion vent panel still has a passive explosion vent function, thus enabling the energy storage power station to have reliable safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0017] Figure 2 is a schematic cross-sectional structural diagram of the sealing assembly and the first bolt in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0018] Figure 3Schematic cross-sectional structure diagram of the thermal insulation cotton, thermal insulation cotton cover and integrated ignition device in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0019] Figure 4 Block diagram of the integrated ignition device in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0020] Figure 5 Schematic structure diagram of the explosion vent panel installed on the energy storage power station box body in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0021] Figure 6 Schematic cross-sectional structure diagram of the explosion vent panel installed on the energy storage power station box body in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention;

[0022] Figure 7 Schematic diagram of the active ignition and pressure relief of the explosion vent panel in the explosion vent panel for an energy storage power station with an integrated active ignition device according to the present invention.

[0023] In the figure: 1, strength film; 2, thermal insulation cotton; 3, thermal insulation cotton cover; 4, integrated ignition device; 41, ignition electrode; 42, transformer; 43, controller; 44, backup battery; 45, hydrogen sensor; 5, sealing component; 51, upper sealing gasket; 52, lower sealing gasket; 6, first bolt; 7, fastening nut; 8, energy storage power station box body; 9, second bolt; 10, U-shaped gap. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1 , the embodiment of the present invention provides an explosion vent panel for an energy storage power station with an integrated active ignition device, including: an energy storage power station box body 8 and an integrated ignition device 4.

[0026] In this embodiment, as Figures 1 - 3As shown, there is a heat insulation cotton 2 outside the integrated ignition device 4. There is a square groove at the center of the heat insulation cotton 2, and the integrated ignition device 4 is embedded in the square groove of the heat insulation cotton 2. A heat insulation cotton cover 3 is sleeved outside the heat insulation cotton 2. There is an opening matching the shape of the integrated ignition device 4 at the center of the bottom of the heat insulation cotton cover 3. The integrated ignition device 4 is installed in the heat insulation cotton 2 and is encapsulated by the heat insulation cotton cover 3 to ensure that the heat insulation cotton 2 and the integrated ignition device 4 will not fall off during the working process. There is an opening matching the shape of the integrated ignition device 4 at the bottom of the heat insulation cotton cover 3 to ensure the normal operation of the ignition device. Moreover, the heat insulation cotton 2 is made of a material with a low thermal conductivity coefficient, effectively isolating the influence of the external environment temperature on the inside of the energy storage power station and ensuring the stable operation of the equipment.

[0027] Among them, as Figure 1 and Figure 2 shown, there is a strength film 1 at the top of the heat insulation cotton 2. Sealing components 5 are bonded to the top of the strength film 1 and the bottom of the heat insulation cotton cover 3. When the internal pressure of the energy storage power station is too high, the strength film 1 will rupture or deform due to the pressure change, and then the explosion relief plate will be opened passively to release the pressure, preventing more serious damage to the equipment. The sealing component 5 includes an upper gasket 51 and a lower gasket 52. The upper gasket 51 fits on the top of the strength film 1, and the lower gasket 52 fits on the bottom of the heat insulation cotton cover 3. There is a U-shaped gap 10 at the top of the strength film 1. Among them, the upper gasket 51 is coated with adhesive and can be pasted on the strength film 1 and cover the U-shaped gap 10 on the strength film to ensure the waterproof performance of the explosion relief plate.

[0028] Referring to Figure 5 and Figure 6 , the sealing component 5 is embedded in the top of the energy storage power station box 8. The upper gasket 51 ensures the sealing between the explosion relief plate and the energy storage power station box 8 and the heat insulation cotton cover 3. By installing the explosion relief plate at the top, it can prevent harm to the surrounding equipment and personnel during the ignition and discharge process.

[0029] Furthermore, referring to Figure 1 and Figure 4 , there is a controller 43, a transformer 42, a backup battery 44 and a hydrogen sensor 45 inside the integrated ignition device 4. An ignition electrode 41 is installed outside the integrated ignition device 4. The hydrogen sensor 45 is signal-connected to the controller 43, and the controller 43 is electrically connected to the backup battery 44, the transformer 42 and the ignition electrode 41. The hydrogen sensor 45 in the integrated ignition device 4 is responsible for monitoring the hydrogen concentration in the environment and transmitting the data to the controller 43. The controller 43 judges the ignition timing according to the preset program or communicates with the main system of the energy storage power station, and raises the voltage through the transformer 42 to provide an ignition voltage for the ignition electrode 41. The ignition electrode 41 generates an electric spark through a high-voltage current to ignite the combustible gas in the air.

[0030] It should be noted that the backup battery 44 can enable the integrated ignition device 4 to continue working for a period of time when the main system of the energy storage power station is powered off.

[0031] As Figure 1 shown, threaded holes are provided at the top near the edges of the heat-insulating cotton cover 3, the strength film 1, the upper gasket 51 and the lower gasket 52. A first bolt 6 is provided in the threaded hole of the upper gasket 51. The bottom end of the first bolt 6 sequentially passes through the threaded holes in the strength film 1, the heat-insulating cotton cover 3 and the lower gasket 52, so that the heat-insulating cotton cover 3, the strength film 1, the upper gasket 51 and the lower gasket 52 can be tightly fitted and fixed to each other through the first bolt 6.

[0032] Furthermore, the heat-insulating cotton cover 3 is threadedly connected to the bottom of the integrated ignition device 4 through a second bolt 9, thereby enhancing the fixing strength between the heat-insulating cotton cover 3 and the integrated ignition device 4 and preventing the integrated ignition device 4 from falling off.

[0033] Referring to Figure 2 , when the explosion vent panel is installed on the energy storage power station, the bottom end of the first bolt 6 passes through the energy storage power station box body 8, and a fastening nut 7 is threadedly connected to the bottom end of the first bolt 6.

[0034] Referring to Figure 7 , in the actual use of the explosion vent panel for the energy storage power station with an integrated active ignition device provided in this embodiment, as the battery thermal runaway occurs, the gas density inside the energy storage power station box body 8 gradually rises. The density of each component in the combustible gas is different from that of air, but due to its too small density, hydrogen will accumulate in the upper part of the energy storage power station. And with the ignition position unchanged, the explosion power first increases and then decreases as the gas concentration increases, and reaches the maximum explosion power at an equivalence ratio of 1.2. Starting the integrated ignition device 4 to vent the explosion under the condition of a relatively low thermal runaway concentration by artificial can greatly reduce the explosion power.

[0035] Summarize and sort out the working steps of this solution according to the above technical solution: During use, when the internal pressure of the energy storage power station is too high, the strength film 1 will rupture or deform due to the pressure change, and then the explosion vent panel will be opened passively to release the pressure, preventing more serious damage to the equipment.

[0036] The heat-insulating cotton 2 is made of a material with a low thermal conductivity coefficient, effectively isolating the influence of the external environment temperature on the inside of the energy storage power station and ensuring the stable operation of the equipment. The integrated ignition device 4 is installed in the square groove in the heat-insulating cotton 2. The integrated ignition device 4 is installed in the heat-insulating cotton 2 and is encapsulated by the heat-insulating cotton cover 3 to ensure that the heat-insulating cotton 2 will not fall off during the working process. The bottom of the heat-insulating cotton cover 3 is provided with an opening matching the shape of the integrated ignition device 4 to ensure the normal operation of the ignition device.

[0037] Among them, the hydrogen sensor 45 in the integrated ignition device 4 is responsible for monitoring the hydrogen concentration in the environment and transmitting the data to the controller 43. The controller 43 determines the ignition timing according to a preset program or communicates with the main system of the energy storage power station, and increases the voltage through the transformer 42 to provide an ignition voltage for the ignition electrode 41. The ignition electrode 41 generates an electric spark through a high-voltage current to ignite the combustible gas in the air, realizing the conversion of the explosion relief panel from a passive pressure relief device to an active pressure relief device, controlling the ignition time and ignition position, and thus controlling the power when an explosion accident occurs in the energy storage container. This method not only reduces the accident damage range but also effectively reduces the installation quantity of the explosion relief panel.

[0038] In summary, the explosion relief panel provided in this embodiment has the characteristics of a compact structure. The control system, hydrogen monitoring function, and battery are integrated inside the ignition device and installed inside the explosion relief panel, without occupying additional space in the energy storage power station.

[0039] In addition, when the integrated ignition device 4 fails and cannot actively open to release pressure, the explosion relief panel provided by the present invention still has a passive explosion relief function and can release pressure, so that the energy storage power station has reliable safety performance.

[0040] Parts not involved in the present invention are the same as or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure relief panel for an energy storage power station with an integrated active ignition device, comprising an energy storage power station box body (8) and an integrated ignition device (4), characterized in that: The outside of the integrated ignition device (4) is provided with heat-insulating cotton (2). A square groove is provided at the center of the heat-insulating cotton (2), and the integrated ignition device (4) is embedded in the square groove of the heat-insulating cotton (2). The outside of the heat-insulating cotton (2) is sleeved with a heat-insulating cotton cover (3). An opening matching the shape of the integrated ignition device (4) is provided at the center of the bottom of the heat-insulating cotton cover (3). A strength film (1) is provided at the top of the heat-insulating cotton (2). Sealing components (5) are bonded to the top of the strength film (1) and the bottom of the heat-insulating cotton cover (3). The sealing components (5) are embedded in the top of the energy storage power station box body (8). A controller (43), a transformer (42), a backup battery (44) and a hydrogen sensor (45) are provided inside the integrated ignition device (4). Ignition electrodes (41) are installed outside the integrated ignition device (4).

2. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: The sealing component (5) includes an upper sealing gasket (51) and a lower sealing gasket (52). The upper sealing gasket (51) is attached to the top of the strength film (1), and the lower sealing gasket (52) is attached to the bottom of the heat-insulating cotton cover (3).

3. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 2, characterized in that: Threaded holes are provided at the top of the heat-insulating cotton cover (3), the strength film (1), the upper sealing gasket (51) and the lower sealing gasket (52) near the edge. A first bolt (6) is provided in the threaded hole of the upper sealing gasket (51). The bottom end of the first bolt (6) sequentially passes through the threaded holes in the strength film (1), the heat-insulating cotton cover (3) and the lower sealing gasket (52).

4. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: The hydrogen sensor (45) is signal-connected to the controller (43), and the controller (43) is electrically connected to the backup battery (44), the transformer (42) and the ignition electrodes (41).

5. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 1, wherein: The heat-insulating cotton cover (3) is threadedly connected to the bottom of the integrated ignition device (4) through a second bolt (9).

6. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 3, characterized in that: The bottom end of the first bolt (6) passes through the energy storage power station box body (8), and the bottom end of the first bolt (6) is threadedly connected with a fastening nut (7).

7. The explosion vent panel for an energy storage power station with an integrated active ignition device according to claim 1, wherein: A U-shaped gap (10) is provided at the top of the strength film (1).

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