An active explosion-proof system and method for lithium battery energy storage production equipment

Abstract

The present invention discloses an active explosion-proof system and method for lithium battery energy storage production equipment, comprising an equipment body, an explosion monitoring unit, a control system unit, an alarm unit, and a trigger suppressor unit. The explosion monitoring unit and the trigger suppressor unit are respectively connected to the equipment body, the explosion monitoring unit is connected to the control system unit, and the control system unit is respectively connected to the alarm unit and the trigger suppressor unit. When a deflagration reaction occurs inside the equipment body, the explosion monitoring unit detects an abnormal signal; the active explosion-proof system provided by the present invention integrates active monitoring and active suppression, and the entire explosion suppression action is completed in milliseconds. The active explosion-proof system detects pressure and flame changes at the initial stage of the explosion by setting an explosion monitoring unit, and timely warns and accurately suppresses the explosion at the initial stage of the explosion, thereby strangling the explosion in its infancy and ending the losses caused by the explosion of the lithium battery energy storage production equipment. The present invention is more advanced, convenient and practical than the existing technology.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion suppression, and in particular to an active explosion-proof system and method for lithium battery energy storage production equipment. Background Art

[0002] The 21st century is an era of vigorous development of new energy. With the vigorous development of the lithium battery energy storage industry in my country, the scale of lithium battery energy storage installed capacity in my country has been rapidly expanded. Compared with commonly used power sources such as thermal power and hydropower, lithium battery energy storage has the characteristics of small single-unit capacity, large number, and scattered distribution, and has significant intermittent, volatile, and random characteristics; with the large-scale development and high proportion of grid connection of lithium battery energy storage, power balance, safe and stable control will face unprecedented challenges; lithium battery energy storage will continue to maintain a rapid development momentum in the future. It is expected that wind power and solar power generation will reach a large scale in the future, and the main scale will even exceed coal-fired power, becoming the main installed capacity. With the increase in scale, the safety and explosion protection of highly active combustible dust and its dust removal system generated in the laser cutting and welding process in the lithium battery production process is particularly important.

[0003] However, the existing early warning means still use traditional smoke and temperature sensing to warn. Single ventilation or suppression means cannot fully meet the actual use requirements and are not enough to completely avoid the occurrence of safety accidents. Therefore, there is an urgent need for more effective and timely early warning systems and devices to cooperate with each other to achieve the effects of early perception, early warning, and early disposal, so as to ensure the safe and reliable operation of lithium battery energy storage production. Summary of the Invention

[0004] The object of the present invention is to provide an active explosion-proof system and method for lithium battery energy storage production equipment to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In the first aspect, the present invention provides an active explosion-proof system for lithium battery energy storage production equipment, comprising an equipment body, an explosion monitoring unit, a control system unit, an alarm unit, and a trigger suppressor unit. The explosion monitoring unit and the trigger suppressor unit are respectively connected to the equipment body, the explosion monitoring unit is connected to the control system unit, and the control system unit is respectively connected to the alarm unit and the trigger suppressor unit. When a deflagration reaction occurs inside the equipment body, the explosion monitoring unit detects an abnormal signal and transmits the signal to the control system unit. On the one hand, the control system unit transmits the signal to the alarm unit to issue an alarm, and on the other hand, activates the trigger suppressor unit to suppress the explosion inside the equipment body.

[0007] As a further solution of the present invention: the explosion monitoring unit includes a flame detection device, which converts the wavelength signal of the collected light into an electrical signal and transmits it to the control system unit.

[0008] As a further solution of the present invention: the explosion monitoring unit includes a dynamic pressure detection device, and the dynamic pressure detection device includes a pressure sensing probe and a pressure rise rate sensing probe. When the pressure sensing probe and the pressure rise rate sensing probe are both higher than the set value, a signal will be transmitted to the control system unit.

[0009] As a further solution of the present invention: the trigger suppressor unit is composed of an umbrella-shaped porous disperser device, a connecting pipe, an explosion suppression bottle device, and a trigger. One end of the umbrella-shaped porous disperser device is installed on the equipment body, and the other end is connected to the connecting pipe, the trigger and the explosion suppression bottle device in sequence. When a deflagration reaction occurs in the equipment body, the control system unit controls the trigger, starts the explosion suppression bottle device, and performs explosion suppression work inside the equipment body.

[0010] As a further solution of the present invention: a bursting disc is provided at a port of the explosion suppression bottle device close to one end of the trigger.

[0011] As a further solution of the present invention: the umbrella-shaped porous disperser device includes a disperser cover, a porous disperser and an inhibitor flow channel, and the disperser cover is connected to the outer wall of the device body through a gasket and bolts.

[0012] As a further solution of the present invention: the explosion suppression bottle device is pre-filled with an inhibitor at a pressure of 6.0 MPa.

[0013] As a further solution of the present invention: the inhibitor is one or a combination of carbon dioxide, heptafluoropropane, sodium bicarbonate, and ammonium dihydrogen phosphate.

[0014] As a further solution of the present invention: the control system unit is composed of an intelligent detection system and a control panel. The outside of the control system unit is also connected to a remote monitoring unit, which can record and remotely monitor the pressure inside the equipment, the pressure inside the explosion suppression bottle, the pipeline flame, the on-off state of the trigger, the on-off state of the flame sensor, the on-off state of the pressure sensor, etc. in real time. Once an abnormal reaction occurs, the suppressor device is activated and the alarm unit is transmitted at the same time.

[0015] As a further solution of the present invention: the control system unit is also provided with a plurality of switch output interfaces, so as to facilitate the user to realize the linkage of related equipment such as fans, dust collectors, and pipe insulation devices.

[0016] In a second aspect, the present invention provides an active explosion-proof method for the active explosion-proof system of the above-mentioned lithium battery energy storage production equipment, comprising the following steps:

[0017] Step 1: The flame detection device monitors the interior of the equipment body in real time, converts the collected light wavelength signal into an electrical signal, and transmits it to the control system unit; the dynamic pressure detection device monitors the pressure and pressure rise rate in the equipment body in real time, and sends an overpressure signal to the control system unit when both the pressure and the pressure rise rate exceed the set value;

[0018] Step 2: The control system unit automatically determines whether an explosion has occurred in the equipment body based on the information received from the flame detection device and the dynamic pressure detection device;

[0019] Step 3: If it is determined that an explosion has occurred, the control system unit sends an explosion signal to the alarm unit and the trigger;

[0020] Step 4: After receiving the trigger signal, the trigger will break the bursting disc in the explosion suppression bottle device, open the pressure relief channel, and the suppressant will be injected into the protected equipment or pipeline at high speed, thereby suppressing the explosion and stopping the explosion process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The active explosion-proof system provided by the present invention integrates active monitoring and active suppression. The entire explosion suppression action is completed in milliseconds. The active explosion-proof system detects the pressure and flame changes at the initial stage of the explosion by setting an explosion monitoring unit, and releases inhibitors to suppress and stop the explosion process before an uncontrolled explosion occurs. The inhibitor works by hindering the explosion reaction and lowering the temperature to a temperature below that required for material combustion by absorbing the heat from the flame front. The inhibitor can also form a barrier between unburned gases, solids, and liquids to prevent further heat transfer. The explosion process after suppression releases less pressure, and timely warning and precise suppression treatment are provided at the initial stage of the explosion, which can nip the explosion in the bud and terminate the losses caused by explosions to lithium battery energy storage production equipment. It is more advanced, convenient, and practical than existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of an active explosion-proof system for lithium battery energy storage production equipment.

[0024] Figure 2 This is a schematic diagram of the working process of an active explosion-proof system for lithium battery energy storage production equipment.

[0025] Figure 3 This is a schematic diagram of the installation of the trigger suppressor unit.

[0026] Figure 4 Schematic diagram of an umbrella-shaped porous disperser.

[0027] Figure 5This is the display interface diagram of the remote monitoring unit on the computer.

[0028] Figure 6 This is the layout diagram of the control system unit.

[0029] Figure 7 Schematic diagram of the explosion suppression process of the explosion-proof system.

[0030] Figure 8 This is a schematic diagram comparing the pressure changes in the equipment over time during the explosion process of lithium battery energy storage production equipment and production equipment with an active explosion protection system.

[0031] The accompanying drawings are numerals:

[0032] 1- Equipment body, 2- Explosion monitoring unit, 3- Control system unit, 4- Alarm unit, 5- Trigger suppressor unit, 6- Remote monitoring unit;

[0033] 21-flame detection device, 22-dynamic pressure detection device;

[0034] 51- umbrella-shaped porous disperser device, 52- connecting pipe, 53- explosion suppression bottle device, 54- trigger;

[0035] 55-disperser cover, 56-porous disperser, 57-inhibitor flow channel, 58-gasket, 59-bolt;

[0036] A-normal explosion process, B-explosion process after suppression. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation in the specification, and therefore cannot be understood as limiting the present invention.

[0040] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0041] See also Figure 1 This embodiment provides an active explosion-proof system for lithium battery energy storage production equipment, including an equipment body 1, an explosion monitoring unit 2, a control system unit 3, and a trigger suppressor unit 5. The equipment body 1 is respectively connected to the explosion monitoring unit 2 and the trigger suppressor unit 5, the explosion monitoring unit 2 is connected to the control system unit 3, and the control system unit 3 is connected to the trigger suppressor unit 5. When a deflagration reaction occurs inside the equipment body 1, the explosion monitoring unit 2 detects an abnormal signal and transmits the signal to the control system unit 3. The control system unit 3 transmits the signal to the alarm unit (attached) Figure 1 Not marked) sounds an alarm, and on the other hand, starts triggering the suppressor unit 5 to suppress the explosion inside the equipment body 1.

[0042] Attachment Figure 2 This is a schematic diagram of the working process of the active explosion-proof system. In this embodiment, the explosion monitoring unit 2 includes a flame detection device 21 and a dynamic pressure detection device 22. The flame detection device converts the wavelength signal of the collected light into an electrical signal and transmits it to the control system unit 3; the dynamic pressure detection device 22 includes a pressure sensing probe and a pressure rise rate sensing probe. When the pressure sensing probe and the pressure rise rate sensing probe are both higher than the set value (that is, the conditions are met at the same time), an alarm signal will be transmitted to the control system unit 3, so that no false alarm will occur.

[0043] The control system unit 3 automatically determines whether the received (flame, pressure) signal is a real explosion or an erroneous operation. If it is a real explosion, the control system unit 3 will transmit the collected explosion signal to the alarm unit 3. In this embodiment, the alarm unit 4 is preferably an audible and visual alarm, which can emit an audible and visual alarm to remind the staff; at the same time, the control system unit 3 will transmit the signal to the trigger 54 in the trigger suppressor unit 5, and the trigger 54 will break the bursting disc in the explosion suppression bottle device 53, open the pressure relief channel, and at the same time suppress the inhibitor pre-filled with 6.0MPa pressure in the bottle. The inhibitor is injected into the protected equipment or pipeline at high speed to suppress the explosion and stop the explosion process; in this embodiment, the inhibitor is a water-based explosion suppressor composed of carbon dioxide, heptafluoropropane, sodium bicarbonate, and ammonium dihydrogen phosphate, or other composite inhibitors can also be selected.

[0044] Figure 3: This is an installation diagram of the trigger suppressor unit 5. The trigger suppressor unit 5 consists of an umbrella-shaped porous disperser device 51, a connecting pipe 52, an explosion suppression bottle device 53, and a trigger 54. One end of the umbrella-shaped porous disperser device 51 is installed on the equipment body 1, and the other end is connected to the connecting pipe 52, the trigger 54 and the explosion suppression bottle device 53 in sequence. A bursting disc is provided in the explosion suppression bottle device 53, and the bursting disc is provided at the port of the explosion suppression bottle device 53 near one end of the trigger 54.

[0045] Figure 4 It is a schematic diagram of an umbrella-shaped porous disperser device, including a disperser cover 55, a porous disperser 56 and an inhibitor flow channel 57. The disperser cover 55 is connected to the outer wall of the equipment body 1 through a matching gasket 58 and a bolt 59, and the inhibitor flow channel 57 is connected to the connecting pipe 52. When a deflagration reaction occurs in the equipment body 1, the control system unit 3 controls the trigger 54, and the trigger 54 breaks through the bursting disc in the explosion suppression bottle device 53, opening the pressure relief channel. At the same time, the inhibitor is injected into the protected equipment or pipeline at high speed to suppress the explosion and stop the explosion process.

[0046] Figure 2 The control system unit 3 is composed of an intelligent detection system and a control panel. The outside of the control system unit 3 is also connected to a remote monitoring unit 6. Figure 5 It is a display interface diagram of the remote monitoring unit 6 on the computer and mobile phone APP. The monitoring content displayed on the computer and mobile phone APP can record and remotely monitor the pressure inside the equipment, the pressure inside the explosion suppression bottle, the pipeline flame, the trigger on and off, the flame sensor on and off, the pressure sensor on and off and other states in real time; once an abnormal reaction occurs, the suppressor device is activated and the alarm unit 4 is transmitted at the same time.

[0047] Figure 6 This is a layout diagram of the control system unit; it includes an acquisition module, a control module, an LCD touch screen, and a switching output module. These modules are each connected to a host computer to exchange information. The host computer can also be connected to a communication module to transmit signals to a remote monitoring unit. Those skilled in the art can use this control system layout diagram to understand how the various components of the control system are connected. The addition of a communication module also allows for real-time monitoring of the system's operating status. Multiple switching output interfaces are provided to facilitate user interaction with related equipment such as fans, dust collectors, and pipe insulation devices.

[0048] Figure 7 Schematic diagram of the explosion suppression process of the explosion-proof system, wherein:

[0049] ① is the initial stage of the explosion, when both the time and the pressure inside the equipment are 0;

[0050] ② The explosion monitoring system operates: At 20ms, the explosion monitoring unit detects an abnormality and transmits the signal to the control system unit. At this time, the pressure inside the equipment is 0.05 bar(g);

[0051] ③ Explosion suppressor action: At 35ms, the explosion suppression is initiated by triggering the suppressor unit. At this time, the pressure inside the equipment is 0.08 bar(g);

[0052] 4. Explosion suppression ends at 80ms, during which the equipment pressure is controlled at 0.2 bar(g). The entire explosion suppression process is completed in milliseconds. The suppression system detects pressure and flame changes at the initial explosion and releases suppressant to stop the explosion before an uncontrolled explosion occurs.

[0053] Figure 8 This is a comparative test conducted by the staff. It is a schematic diagram comparing the changes in pressure inside the equipment over time when explosions occur in ordinary lithium battery energy storage production equipment and production equipment with active explosion-proof systems. Curve A is the normal explosion process, and curve B is the explosion process after suppression. It can be clearly seen that the explosion pressure is significantly reduced after suppression, which greatly improves the safety and service life of the equipment.

[0054] The explosion suppression system provided by this invention is an active explosion prevention intervention method, operating and completing in milliseconds. The suppression system detects pressure and flame changes at the initial stage of an explosion and releases suppressant to halt the explosion before an uncontrolled explosion occurs. The suppressant works by hindering the explosion reaction, absorbing heat from the flame front to reduce the temperature below that required for material combustion. The suppressant also forms a barrier between unburned gases, solids, and liquids, preventing further heat transfer. Therefore, the suppression system should be considered a preferred active explosion prevention technology.

[0055] Specifically, the method for using the active explosion-proof system for lithium battery energy storage production equipment includes the following steps:

[0056] Step 1: The flame detection device 21 monitors the interior of the device body 1 in real time, converts the collected light wavelength signal into an electrical signal, and transmits it to the control system unit 3; the dynamic pressure detection device 22 monitors the pressure and pressure rise rate in the device body 1 in real time, and sends an overpressure signal to the control system unit 3 when both the pressure and the pressure rise rate exceed the set value;

[0057] Step 2: The control system unit 3 automatically determines whether an explosion has occurred in the device body 1 by combining the information received from the flame detection device 21 and the dynamic pressure detection device 22;

[0058] Step 3: If it is determined that an explosion has occurred, the control system unit 3 sends an explosion signal to the alarm unit 3 and the trigger 54;

[0059] Step 4: After receiving the trigger signal, the trigger 54 will break the bursting disc in the explosion suppression bottle device 53, open the pressure relief channel, and the suppressant will be injected into the protected equipment or pipeline at high speed, thereby suppressing the explosion and stopping the explosion process.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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. An active explosion-proof system for lithium battery energy storage production equipment, characterized by: The device comprises a device body (1), an explosion monitoring unit (2), a control system unit (3), an alarm unit (4), and a trigger suppressor unit (5); the device body (1) is respectively connected to the explosion monitoring unit (2) and the trigger suppressor unit (5); the explosion monitoring unit (2) is connected to the control system unit (3); the control system unit (3) is respectively connected to the alarm unit (4) and the trigger suppressor unit (5); when a deflagration reaction occurs inside the device body (1), the explosion monitoring unit (2) detects an abnormal signal and transmits the signal to the control system unit (3); the control system unit (3) transmits the signal to the alarm unit (4) to issue an alarm, and on the other hand, activates the trigger suppressor unit (5) to suppress the explosion inside the device body (1); The explosion monitoring unit (2) includes a flame detection device (21), which converts the wavelength signal of the collected light into an electrical signal and transmits it to the control system unit (3); The explosion monitoring unit (2) includes a dynamic pressure detection device (22), and the dynamic pressure detection device (22) includes a pressure sensing probe and a pressure rise rate sensing probe. When the pressure sensing probe and the pressure rise rate sensing probe are both higher than a set value, a signal is transmitted to the control system unit (3); The trigger suppressor unit (5) is composed of an umbrella-shaped porous disperser device (51), a connecting pipe (52), an explosion suppression bottle device (53), and a trigger (54). One end of the umbrella-shaped porous disperser device (51) is mounted on the device body (1), and the other end is sequentially connected to the connecting pipe (52), the trigger (54), and the explosion suppression bottle device (53). When a deflagration reaction occurs in the device body (1), the control system unit (3) controls the trigger (54), activates the explosion suppression bottle device (53), and performs explosion suppression work on the inside of the device body (1). The umbrella-shaped porous disperser device (51) includes a disperser cover (55), a porous disperser (56) and an inhibitor flow channel (57). The disperser cover (55) is connected to the outer wall of the device body (1) through a gasket (58) and a bolt (59).

2. The active explosion-proof system for lithium battery energy storage production equipment according to claim 1, characterized in that: The explosion suppression bottle device (53) is provided with a bursting disc at a port close to one end of the trigger (54).

3. The active explosion-proof system for lithium battery energy storage production equipment according to claim 1, characterized in that: The explosion suppression bottle device (53) is pre-filled with a suppressant at a pressure of 6.0 MPa.

4. The active explosion-proof system for lithium battery energy storage production equipment according to claim 3, characterized in that: The inhibitor is one or a combination of carbon dioxide, heptafluoropropane, sodium bicarbonate, and ammonium dihydrogen phosphate.

5. The active explosion-proof system for lithium battery energy storage production equipment according to claim 1, characterized in that: The control system unit (3) is composed of an intelligent detection system and a control panel. The control system unit (3) is also connected to a remote monitoring unit (6) on the outside, which can record and remotely monitor the pressure inside the equipment, the pressure inside the explosion suppression bottle, the flame in the pipeline, the on-off state of the trigger, the on-off state of the flame sensor, and the on-off state of the pressure sensor in real time. Once an abnormal reaction occurs, the suppressor device is activated and the alarm unit (4) is transmitted at the same time.

6. An active explosion-proof method, used in the active explosion-proof system for lithium battery energy storage production equipment according to any one of claims 1 to 5, characterized in that: The steps include: Step 1: The flame detection device (21) monitors the interior of the device body (1) in real time, and converts the wavelength signal of the collected light into an electrical signal, which is transmitted to the control system unit (3); the dynamic pressure detection device (22) monitors the pressure and the pressure rise rate in the device body (1) in real time, and sends an overpressure signal to the control system unit (3) when both the pressure and the pressure rise rate are higher than the set value; Step 2: The control system unit (3) automatically determines whether an explosion has occurred in the device body (1) by combining the information received from the flame detection device (21) and the dynamic pressure detection device (22); Step 3: If it is determined that an explosion has occurred, the control system unit (3) sends an explosion signal to the alarm unit (4) and the trigger (54); Step 4: After receiving the trigger signal, the trigger (54) breaks the bursting disc in the explosion suppression bottle device (53), opens the pressure relief channel, and the suppressant is injected into the protected equipment or pipeline at high speed, thereby suppressing the explosion and stopping the explosion process.

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