Explosion venting plate with integrated active ignition device for energy storage power station

Abstract

The invention discloses an energy storage power station explosion venting plate with an integrated active ignition device, the energy storage power station explosion venting plate comprises an energy storage power station box body and the integrated ignition device, the exterior of the integrated ignition device is provided with thermal insulation cotton, the center of the thermal insulation cotton is provided with a square groove, and the integrated ignition device is embedded in the square groove of the thermal insulation cotton. The heat preservation cotton is sleeved with a heat preservation cotton cover, and an opening matched with the integrated ignition device in shape is formed in the center of the bottom of the heat preservation cotton cover. The integrated ignition device has the advantage of being compact in structure, the controller, the hydrogen sensor and the standby battery are integrated into the integrated ignition device and installed in the explosion venting plate, extra space of the energy storage power station is not occupied, and therefore the installation space of the explosion venting plate of the energy storage power station is reduced; when the integrated ignition device breaks down and cannot be actively started to release pressure, the explosion venting plate still has the passive explosion venting function.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery safety, and particularly to a pressure relief plate 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 been increasing 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, posing an explosion hazard to the energy storage power station.

[0003] To prevent greater harm caused by explosion accidents, pressure relief plates are generally installed in energy storage power stations for pressure relief. The pressure relief plate is a passive pressure relief device. When the internal pressure of the energy storage power station reaches the opening pressure of the pressure relief plate, the pressure relief plate 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 pressure relief plate with completely passive release needs to meet the pressure release under the maximum explosion power, which will require a large number of pressure relief plates 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 plate 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 plate 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 on 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 gasket and a lower gasket. The upper gasket is attached to the top of the strength film, and the lower 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 gasket, and the lower gasket. A first bolt is provided in the threaded hole of the upper 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 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: 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.

[0014] Second, during the use of the explosion vent panel provided by the present invention, when the integrated ignition device fails to actively open and release pressure, and 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

[0015] 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; 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; Figure 3 is a schematic cross-sectional structural diagram of the heat-insulating cotton, the heat-insulating cotton cover, and 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; Figure 4 The structural 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; Figure 5 The structural schematic 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; Figure 6 The cross-sectional structural schematic 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; Figure 7 The 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.

[0016] 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 gasket; 52, lower gasket; 6, first bolt; 7, fastening nut; 8, energy storage power station box body; 9, second bolt; 10, U-shaped gap. Specific embodiments

[0017] 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0018] 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.

[0019] In this embodiment, as Figures 1-3 shown, the outside of the integrated ignition device 4 is provided with thermal insulation cotton 2. A square groove is provided at the center of the thermal insulation cotton 2, and the integrated ignition device 4 is embedded in the square groove of the thermal insulation cotton 2. A thermal insulation cotton cover 3 is sleeved outside the thermal insulation cotton 2. An opening matching the shape of the integrated ignition device 4 is provided at the center of the bottom of the thermal insulation cotton cover 3. The integrated ignition device 4 is installed in the thermal insulation cotton 2 and is encapsulated by the thermal insulation cotton cover 3 to ensure that the thermal insulation cotton 2 and the integrated ignition device 4 will not fall off during the working process. The bottom of the thermal insulation 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. Moreover, the thermal 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.

[0020] Among them, as Figure 1 and Figure 2 shown, a strength film 1 is provided at the top of the thermal insulation cotton 2, and sealing components 5 are bonded to both the top of the strength film 1 and the bottom of the thermal 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, thereby causing the explosion vent panel to be opened passively and 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 thermal insulation cotton cover 3. A U-shaped gap 10 is provided 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 vent panel.

[0021] 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 vent panel and the energy storage power station box 8 and the thermal insulation cotton cover 3. By installing the explosion vent panel on the top, it can prevent harm to surrounding equipment and personnel during the ignition and discharge process.

[0022] Furthermore, referring to Figure 1 and Figure 4 , the integrated ignition device 4 is internally provided with a controller 43, a transformer 42, a backup battery 44, and a hydrogen sensor 45. 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 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.

[0023] 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.

[0024] As Figure 1 shown, threaded holes are provided near the edges at the tops of the thermal insulation 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 thermal insulation cotton cover 3, and the lower gasket 52, so that the thermal insulation cotton cover 3, the strength film 1, the upper gasket 51, and the lower gasket 52 can be tightly fitted and fixed together through the first bolt 6.

[0025] Further, the thermal insulation cotton cover 3 is threadedly connected to the bottom of the integrated ignition device 4 through the second bolt 9, thereby enhancing the fixing strength between the thermal insulation cotton cover 3 and the integrated ignition device 4 and preventing the integrated ignition device 4 from falling off.

[0026] 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 penetrates 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.

[0027] Referring to Figure 7 , in 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 increases. 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, reaching the maximum explosion power at an equivalence ratio of 1.2. When the integrated ignition device 4 is activated to vent the explosion under the condition of a relatively low thermal runaway concentration manually, the explosion power can be greatly reduced.

[0028] 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.

[0029] The thermal 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. The integrated ignition device 4 is installed in the square groove in the thermal insulation cotton 2. The integrated ignition device 4 is installed in the thermal insulation cotton 2 and is encapsulated by the thermal insulation cotton cover 3 to ensure that the thermal insulation cotton 2 will not fall off during the working process. The bottom of the thermal insulation 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.

[0030] 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 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 the ignition voltage for the ignition electrode 41. The ignition electrode 41 generates an electric spark through the high-voltage current to ignite the combustible gas in the air, realizing the conversion of the explosion vent 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 the energy storage container has an explosion accident. This method not only reduces the accident damage range but also can effectively reduce the installation quantity of the explosion vent panel.

[0031] In summary, the explosion vent panel provided in this embodiment has the characteristic of being structurally compact. The control system, hydrogen monitoring function, and battery are integrated inside the ignition device and installed inside the explosion vent panel, without occupying additional space in the energy storage power station.

[0032] In addition, when the integrated ignition device 4 fails and cannot actively open to release pressure, the explosion vent panel provided by the present invention still has a passive explosion venting function and can release pressure, thus enabling the energy storage power station to have reliable safety performance.

[0033] Parts not involved in the present invention are the same as the prior art or can be implemented using the prior art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood 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. An explosion venting plate for an energy storage power station with an integrated active ignition device, comprising an energy storage power station box (8) and an integrated ignition device (4), characterized in that: The integrated ignition device (4) is provided with thermal insulation cotton (2) on the outside, a square groove is provided at the center of the thermal insulation cotton (2), and the integrated ignition device (4) is embedded in the square groove of the thermal insulation cotton (2), the thermal insulation cotton (2) is provided with a thermal insulation cotton cover (3) on the outside, and an opening matching the shape of the integrated ignition device (4) is provided at the center of the bottom of the thermal insulation cotton cover (3), a strength film (1) is provided on the top of the thermal insulation cotton (2), and a sealing component (5) is bonded to the top of the strength film (1) and the bottom of the thermal insulation cotton cover (3), and the sealing component (5) is embedded in the top of the energy storage power station box (8).

2. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: The integrated ignition device (4) is internally provided with a controller (43), a transformer (42), a backup battery (44) and a hydrogen sensor (45), and the integrated ignition device (4) is externally provided with an ignition electrode (41).

3. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: The sealing assembly (5) comprises an upper sealing pad (51) and a lower sealing pad (52), wherein the upper sealing pad (51) is attached to the top of the strength membrane (1), and the lower sealing pad (52) is attached to the bottom of the thermal insulation cotton cover (3).

4. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 3, characterized in that: The thermal insulation cotton cover (3), the strength membrane (1), the upper sealing gasket (51) and the lower sealing gasket (52) are all provided with threaded holes near the edges of the tops thereof, a first bolt (6) is provided in the threaded hole of the upper sealing gasket (51), and a bottom end of the first bolt (6) passes through the threaded holes on the strength membrane (1), the thermal insulation cotton cover (3) and the lower sealing gasket (52) in sequence.

5. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 2, 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 electrode (41).

6. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: The heat-insulating cotton cover (3) is threadedly connected to the bottom of the integrated ignition device (4) via a second bolt (9).

7. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 4, characterized in that: One end of the bottom of the first bolt (6) passes through the energy storage power station box (8), and one end of the bottom of the first bolt (6) is threadedly connected to a fastening nut (7).

8. The explosion venting plate for an energy storage power station with an integrated active ignition device according to claim 1, characterized in that: A U-shaped gap (10) is provided on the top of the strength membrane (1).

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