Safety monitoring equipment for photovoltaic power generation energy storage equipment

Abstract

The invention relates to the technical field of new energy storage safety monitoring, in particular to photovoltaic power generation energy storage equipment safety monitoring equipment which comprises a monitoring box, two alarm lamps are symmetrically installed on the upper end face of the monitoring box, the alarm lamps are electrically connected with a controller, one side of the monitoring box is communicated with an external pipe, and the external pipe is connected with the controller. The external pipe is connected with an air extractor; the negative air pressure assembly comprises lifting frames which are symmetrically arranged in the monitoring box, and the lifting frames are driven to ascend and descend in the monitoring box. Through the collaborative design of the negative pressure assembly and the pigment flowing of the transparent tube, double visual monitoring of the sealing performance of the energy storage equipment is realized, when the battery pack leaks, the negative pressure in the monitoring space is formed to drive the lifting frame to rebound, so that the pigment in the air bag flows back to the transparent tube, and the sealing performance of the energy storage equipment is ensured. Operators can intuitively and quickly judge faults according to the change of the liquid level of the pigment.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy storage safety monitoring, and in particular to a photovoltaic power generation energy storage equipment safety monitoring device. Background Art

[0002] Photovoltaic power generation and energy storage equipment is a device that stores and manages the electrical energy generated by a photovoltaic power generation system. It is usually composed of a battery pack (such as lithium-ion batteries, lead-acid batteries, etc.), a battery management system, an energy conversion system, and supporting control and protection equipment.

[0003] Sealing monitoring is the core link of battery pack safety monitoring. It mainly focuses on key parts such as battery pack shell, sealing ring, weld and internal gas environment. Through airtightness test, gas composition analysis, pressure and humidity monitoring and other means, the sealing performance is evaluated in real time to prevent the risk of electrolyte decomposition, metal corrosion or thermal runaway caused by the intrusion of external oxygen, water vapor and other gases, and avoid safety and environmental problems caused by the leakage of internal harmful substances. With the rapid development of photovoltaic energy storage technology, battery pack sealing monitoring has become a core link to ensure the safe operation of energy storage systems. Traditional detection methods mostly use water immersion airtightness detection, such as a dry and wet sealing detection instrument for new energy battery boxes disclosed in Publication No. CN113432814B. The sealing is verified by injecting gas into the battery pack and then immersing it in water to observe bubbles. However, the immersion operation may cause moisture to penetrate into the battery pack. Although the battery pack leaks, the internal batteries can continue to be used. After the moisture enters, it may affect the normal operation of the battery, resulting in a decrease in the charging and discharging efficiency of the battery. Moreover, after the monitoring is completed, if the moisture attached to the outer wall of the battery pack is not completely dried, it is easy to cause corrosion of metal parts, circuit short circuit or insulation performance degradation, which will instead form a safety hazard. In addition, it is difficult to accurately identify tiny leaks (such as cracks <0.1mm) or slow leaks (such as microporous gas seepage) by relying on naked eye observation of bubbles to judge leakage, and the missed detection rate is high. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a photovoltaic power generation and energy storage equipment safety monitoring device, which can effectively solve the problem that the water immersion operation in the prior art may cause water to enter the battery pack and cause corrosion.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a photovoltaic power generation and energy storage equipment safety monitoring device, comprising: A monitoring box, wherein two alarm lights are symmetrically mounted on the upper end surface of the monitoring box, the alarm lights are electrically connected to a controller, one side of the monitoring box is connected to an external pipe, and the external pipe is connected to a gas extraction device; A negative air pressure component, the negative air pressure component includes a lifting frame symmetrically arranged inside the monitoring box, the lifting frame is driven to lift inside the monitoring box, an air bag is fixedly installed on the inner wall of the lifting frame, the air bag has an upper air cavity and a lower air cavity, a gas sensor is fixedly installed on the inner wall of the upper air cavity, the gas sensor is electrically connected to the controller, and two transparent tubes are arranged on one side of the monitoring box and below the external tube, and the transparent tubes are filled with pigment; The monitoring component includes a partition block fixed on the inner wall of the monitoring box, the partition block divides the interior of the monitoring box into two monitoring spaces, an inner cavity is opened inside the partition block, through holes are opened on the inner walls on both sides of the inner cavity, and blocks driven to rise and fall are arranged on the inner wall of the inner cavity at the positions corresponding to the through holes.

[0006] Preferably, a slide groove is symmetrically provided on the upper end surface of the monitoring box, the lifting frame is airtightly slidably connected to the slide groove, an external fixing frame is fixedly installed on the upper end surface of the monitoring box at the position corresponding to the slide groove, an internal fixing frame is fixedly installed on the inner top end of the monitoring box at the corresponding slide groove, the lifting frame is slidably connected to the external fixing frame and the internal fixing frame, a compression tank is embedded in the inner bottom end of the internal fixing frame, a first spring is fixedly installed between the compression tank and the lifting frame, the lower end surface of the airbag is connected to a delivery pipe, the lower end of the delivery pipe passes through the lifting frame, the compression tank, the monitoring box and is connected to a transparent tube.

[0007] Preferably, a fixing frame is symmetrically installed on the outer wall of the monitoring box, and the fixing frame is fixedly connected to the outer wall of the transparent tube. Two pairs of rotating seats are symmetrically fixedly installed on the upper end surface of the monitoring box and on both sides of the external fixing frame. A rotating shaft is rotatably installed between each pair of the rotating seats. A sealing plate is fixedly installed on the outer wall of the rotating shaft, and iron sheets are fixedly installed on both sides of the sealing plate. A magnetic strip is embedded on the upper end surface of the monitoring box and at the position corresponding to the iron sheet. A mounting ring is fixedly installed on the opposite side of the rotating seat, and a coil spring is arranged inside the mounting ring. The inner and outer ends of the coil spring are respectively fixedly connected to the mounting ring and the rotating shaft.

[0008] Preferably, a spring retaining switch is fixedly installed at the inner bottom end of the inner fixed frame, and the spring retaining switch is electrically connected to the controller. A sliding baffle is fixedly installed on the inner wall of the inner cavity and at the corresponding through hole. An air inlet hole is opened at the lower position of the outer wall of the sliding baffle. The blocking block is air-tightly slidably connected to the sliding baffle, and a second spring is fixedly installed between the blocking block and the sliding baffle.

[0009] Preferably, a lifting box is fixedly installed on the inner top end of the monitoring box, a lifting plate is airtightly slidably installed on the inner wall of the lifting box, a sealing baffle is fixedly installed on the upper end surface of the lifting plate, the sealing baffle is airtightly slidably connected to the lifting box, two cavities are symmetrically opened inside the partition block and above the inner cavity, a bellows is fixedly installed on the inner wall of the cavity, the interior of the bellows is filled with gas, the upper position of the outer wall of the bellows is fixedly connected to the lifting plate, the upper end surface of the bellows is connected with a connecting pipe, the upper end of the connecting pipe passes through the partition block and the monitoring box and is installed with a valve, the bellows is connected to the sliding baffle through a ventilation pipe.

[0010] Preferably, air inlets are provided inside the monitoring box and the lifting box, a third spring is fixedly installed between the lifting plate and the lifting box, the outer wall of the ventilation pipe is connected with a connecting pipe, the upper end of the connecting pipe passes through the spacer, the lifting frame, the airbag and is connected with the upper air cavity.

[0011] Preferably, a support rod is fixedly installed on the inner top of the lifting box, an electromagnet is fixedly installed on the lower end of the support rod, the electromagnet is electrically connected to the controller, and the electromagnet is magnetically matched with the lifting plate.

[0012] Preferably, it also includes a fixing component, which includes a base fixed on the lower end surface of the monitoring box, a partition plate fixedly installed between the base and the monitoring box, a slide rail symmetrically installed on the upper end surface of the base, a bearing frame slidably installed on the upper end surface of the slide rail, a fixed pipe is connected to the lower end surface of the monitoring box at a position corresponding to the bearing frame, a lifting pipe is limitedly slidably installed on the outer wall of the fixing pipe, and a conical sleeve is threadedly installed on the outer wall of the lifting pipe.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: First, through the coordinated design of the negative air pressure component and the transparent tube pigment flow, dual visual monitoring of the sealing of the energy storage equipment is achieved. When the battery pack leaks, the negative pressure formed in the monitoring space will drive the lifting frame to rebound, causing the pigment in the airbag to flow back to the transparent tube. The operator can quickly judge the fault through the changes in the pigment liquid level. At the same time, the corrugated telescopic tube can convert the negative pressure into chemical gas flow, triggering the secondary alarm through the gas sensor, forming a dual protection mechanism of mechanical indication and electronic monitoring, which greatly improves the reliability of the detection results and the timeliness of abnormal response.

[0014] Second, the monitoring box is divided into two monitoring spaces by a spacer, which can simultaneously monitor the sealing status of two battery packs. The threaded matching design of the conical sleeve and the lifting tube in the fixed component can not only adapt to the sizes of battery filling ports of different specifications, but also effectively prevent external gas interference through conical surface sealing. Combined with the sealing plate driven by the coil spring and the magnetic suction structure, multiple airtight protections are formed during the vacuum stage to ensure the stability of the air pressure in the detection environment, so that even tiny leaks can be accurately captured, which significantly improves the safety monitoring accuracy of the photovoltaic energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the monitoring box of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the negative air pressure component of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at A in the middle.

[0017] Figure 5 It is a structural schematic diagram of the monitoring component of the present invention; Figure 6 It is a structural schematic diagram of the fixing assembly of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the fixed tube of the present invention.

[0018] Figure numerals: 1, monitoring box; 101, external pipe; 102, warning light; 2, negative air pressure assembly; 201, external fixing frame; 202, internal fixing frame; 203, lifting frame; 204, air bag; 205, compression tank; 206, first spring; 207, delivery pipe; 208, fixing frame; 209, transparent tube; 210, rotating seat; 211, rotating shaft; 212, sealing plate; 213, mounting ring; 214, magnetic strip; 215, iron sheet; 3, monitoring assembly; 301, spring holding switch; 302, spacer; 303, inner cavity; 304 , sliding baffle; 305, block; 306, second spring; 307, lifting box; 308, lifting plate; 309, third spring; 310, support rod; 311, electromagnet; 312, cavity; 313, bellows; 314, connecting pipe; 315, valve; 316, vent pipe; 317, connecting pipe; 318, air inlet; 319, sealing baffle; 4, fixed assembly; 401, base; 402, partition plate; 403, slide rail; 404, bearing frame; 405, fixed pipe; 406, lifting pipe; 407, tapered sleeve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described below in conjunction with the embodiments.

[0021] Example: Refer to Figures 1 to 7 , a photovoltaic power generation energy storage equipment safety monitoring device, comprising: Monitoring box 1, two alarm lights 102 are symmetrically installed on the upper end surface of the monitoring box 1, and the alarm lights 102 are electrically connected to the controller. One side of the monitoring box 1 is connected to an external pipe 101, and the external pipe 101 is connected to an exhaust device. The exhaust device adopts a self-sealing vacuum pump. The core design of the self-sealing vacuum pump is to integrate a mechanical sealing structure inside the pump. When the pump stops working, the sealing structure automatically closes the air inlet; The negative air pressure component 2 includes a lifting frame 203 symmetrically arranged inside the monitoring box 1. The lifting frame 203 is driven to lift inside the monitoring box 1. An air bag 204 is fixedly installed on the inner wall of the lifting frame 203. The air bag 204 has an upper air cavity and a lower air cavity. A gas sensor is fixedly installed on the inner wall of the upper air cavity. The gas sensor adopts an existing carbon dioxide sensor for use. The carbon dioxide sensor is a detection device based on the principle of electrochemical reaction, which can convert the concentration of the target chemical substance into a measurable electrical signal (such as current, voltage or resistance). The gas sensor is electrically connected to the controller. Two transparent tubes 209 are arranged on one side of the monitoring box 1 and below the external pipe 101. The transparent tubes 209 are filled with pigments. The setting of the pigments can effectively allow operators to observe during the flow process, and the pigments adopt inorganic pigments so as to maintain a long-term flow state in a sealed environment. The monitoring component 3 includes a partition block 302 fixed on the inner wall of the monitoring box 1, the partition block 302 divides the interior of the monitoring box 1 into two monitoring spaces, an inner cavity 303 is provided inside the partition block 302, through holes are provided on the inner walls on both sides of the inner cavity 303, and a blocking block 305 that is driven to rise and fall is provided on the inner wall of the inner cavity 303 and at the corresponding through holes.

[0022] Reference Figures 2 to 4The upper end surface of the monitoring box 1 is symmetrically provided with a slide groove, and the lifting frame 203 is airtightly slidably connected with the slide groove. The upper end surface of the monitoring box 1 is fixedly installed with an external fixing frame 201 at the corresponding slide groove position, and the inner top of the monitoring box 1 is fixedly installed with an inner fixing frame 202 at the corresponding slide groove. The lifting frame 203 is slidably connected with the external fixing frame 201 and the inner fixing frame 202. A compression tank 205 is embedded in the inner bottom end of the inner fixing frame 202. A first spring 206 is fixedly installed between the compression tank 205 and the lifting frame 203. The lower end surface of the airbag 204 is connected with a conveying pipe 207. The lower end of the conveying pipe 207 passes through the lifting frame 203, the compression tank 205, the monitoring box 1 and is connected with a transparent tube 209. When the airbag 204 is expanded by negative pressure in the monitoring space, the paint in the transparent tube 209 is drawn into it through the conveying pipe 207, and the transparent tube 209 adopts fluorinated ethylene propylene The olefin copolymer material has similar low surface energy and chemical stability, and at the same time has higher transparency, which can prevent the pigment from sticking to the inner wall of the transparent tube 209. The outer wall of the monitoring box 1 is symmetrically installed with a fixing frame 208, and the fixing frame 208 is fixedly connected to the outer wall of the transparent tube 209. The upper end surface of the monitoring box 1 and on both sides of the external fixing frame 201 are symmetrically fixedly installed with two pairs of rotating seats 210, and a rotating shaft 211 is rotatably installed between each pair of rotating seats 210. A sealing plate 212 is fixedly installed on the outer wall of the rotating shaft 211, and iron sheets 215 are fixedly installed on both sides of the sealing plate 212. A magnetic strip 214 is embedded on the upper end surface of the monitoring box 1 and at the position corresponding to the iron sheet 215. A mounting ring 213 is fixedly installed on the opposite side of the rotating seat 210, and a coil spring is arranged inside the mounting ring 213. The inner and outer ends of the coil spring are respectively fixedly connected to the mounting ring 213 and the rotating shaft 211.

[0023] Reference Figures 3 to 6A spring-held switch 301 is fixedly installed at the inner bottom end of the inner fixing frame 202. The spring-held switch 301 is a device that uses the mechanical characteristics of a spring to realize a switch function. The on and off states of the switch are controlled by the compression or extension of the spring. When an external force acts on the switch, the spring is compressed or stretched, the switch contacts are closed, and the circuit is connected. When the external force is removed, the spring returns to its original state, the switch contacts are disconnected, and the circuit is disconnected. The spring-held switch 301 is electrically connected to the controller. A sliding baffle 304 is fixedly installed on the inner wall of the inner cavity 303 and at the corresponding through hole. An air inlet hole is opened at the lower position of the outer wall of the sliding baffle 304. The blocking block 305 is connected to the sliding baffle 30 4 is airtightly slidably connected, a second spring 306 is fixedly installed between the block 305 and the sliding baffle 304, a lifting box 307 is fixedly installed on the inner top of the monitoring box 1, a lifting plate 308 is airtightly slidably installed on the inner wall of the lifting box 307, a sealing baffle 319 is fixedly installed on the upper end surface of the lifting plate 308, and the sealing baffle 319 is airtightly slidably connected to the lifting box 307, two cavities 312 are symmetrically opened inside the spacer 302 and above the inner cavity 303, a bellows telescopic tube 313 is fixedly installed on the inner wall of the cavity 312, and the bellows telescopic tube 313 is filled with gas, and the gas can use carbon dioxide, which is non-toxic and harmless, cheap, and the existing gas The body sensor technology is mature and has high detection accuracy. It can effectively detect the carbon dioxide entering the upper air cavity. The outer wall of the bellows expansion tube 313 is fixedly connected to the lifting plate 308 at the upper position. The upper end surface of the bellows expansion tube 313 is connected with a connecting pipe 314. The upper end of the connecting pipe 314 passes through the spacer 302 and the monitoring box 1 and is installed with a valve 315. The valve 315 adopts an existing stop valve. This stop valve can drive the valve stem to move linearly by rotating the hand wheel, so that the valve disc (valve core) contacts or separates from the valve seat, thereby realizing the opening and closing of the valve. The bellows expansion tube 313 is connected to the sliding baffle 304 through a vent pipe 316. The monitoring box 1 and the inside of the lifting box 307 are connected. An air inlet 318 is provided, and a third spring 309 is fixedly installed between the lifting plate 308 and the lifting box 307. The outer wall of the ventilation pipe 316 is connected with a connecting pipe 317. The upper end of the connecting pipe 317 passes through the partition block 302, the lifting frame 203, the airbag 204 and is connected with the upper air cavity. A support rod 310 is fixedly installed on the inner top of the lifting box 307, and an electromagnet 311 is fixedly installed on the lower end of the support rod 310. The electromagnet 311 is electrically connected to the controller, and the electromagnet 311 is magnetically matched with the lifting plate 308. The electromagnet 311 is a device that uses current to pass through a coil to generate a magnetic field, and can convert electrical energy into magnetic energy, thereby achieving attraction or repulsion of magnetic materials.

[0024] Reference Figure 7, also includes a fixing component 4, the fixing component 4 includes a base 401 fixed on the lower end surface of the monitoring box 1, a partition plate 402 is fixedly installed between the base 401 and the monitoring box 1, a slide rail 403 is symmetrically installed on the upper end surface of the base 401, a bearing frame 404 is slidably installed on the upper end surface of the slide rail 403, the bearing frame 404 can carry the battery pack and move, the lower end surface of the monitoring box 1 is connected with a fixing tube 405 at the position corresponding to the bearing frame 404, the outer wall of the fixing tube 405 is limitedly slidably installed with a lifting tube 406, the outer wall of the lifting tube 406 is threadedly installed with a conical sleeve 407, the lower end of the lifting tube 406 is provided with a conical structure, when the conical sleeve 407 rotates and descends, the conical structure provided at the lower end of the conical sleeve 407 will overlap with the lower end of the lifting tube 406, so as to fix the battery pack filling port.

[0025] The working principle of the present invention is as follows: 1. Fix the battery pack and evacuate the air: Pull the carrier frame 404 out from the upper end of the slide rail 403, place the battery pack to be monitored on the carrier frame 404, pull the lifting tube 406 to slide on the outer wall of the fixing tube 405, align it with the liquid injection port of the battery pack, rotate the conical sleeve 407 to make the conical sleeve 407 descend on the outer wall of the lifting tube 406, and fix the periphery of the liquid injection port of the battery pack by overlapping the lower end of the conical sleeve 407 with the lower end of the lifting tube 406 with the cone, and open the exhaust device at a fixed time. The exhaust device extracts the gas inside the inner cavity 303 and the monitoring box 1 through the external pipe 101, so that the air pressure inside the inner cavity 303 and the monitoring space is reduced to a preset negative pressure; 2. Level 1 monitoring: After the air pressure in the monitoring space is reduced to a preset negative pressure, the lifting frame 203 slides into the monitoring space (i.e., the monitoring box 1) between the outer fixing frame 201 and the inner fixing frame 202 through the slide groove, and the lifting frame 203 will drive the airbag 204 to slide into the monitoring box 1 during the sliding process (in the process of the airbag 204 sliding into the monitoring box 1, the airbag 204 will expand due to the reduction of the air pressure in the monitoring space, and in the process of the airbag 204 expanding, it will be in airtight contact with the inner wall of the slide groove, so that the outside air will not pass through During the descent process, the gap between the airbag 204 and the slide groove enters the interior of the monitoring box 1), compresses the first spring 206, and presses the first spring 206 into the compression tank 205 in a compressed state. During the descent process of the airbag 204 into the monitoring space, the airbag 204 expands as the air pressure inside the monitoring space continues to decrease. During the expansion process of the airbag 204, the paint in the transparent tube 209 is drawn into the lower air cavity through the delivery pipe 207. As the air pressure inside the monitoring box 1 continues to decrease, the lower end surface of the lifting frame 203 contacts the inner end of the inner fixing frame 202, and the lifting frame 203 squeezes the spring to keep The switch 301 is turned on, and the lifting frame 203 will press the connecting pipe 317 when it moves down, so that the gas cannot flow. The controller will control the disconnection of the voltage on the electromagnet 311 and the air extraction device through the spring to keep the switch 301 triggered. The air extraction device will stop extracting gas, and the electromagnet 311 will not generate magnetism. The set lifting plate 308 will slide down on the inner wall of the lifting box 307 (the inner wall of the lifting box 307 is connected to the outside world through the air inlet 318 above the lifting plate 308) because the air pressure in the monitoring box 1 is greater than the external air pressure, and the third spring 309 is stretched, and the sliding lifting plate 308 is lowered. 8 will drive the bellows expansion tube 313 to compress, so that the chemical gas inside the bellows expansion tube 313 enters between the block 305 and the sliding baffle 304 through the vent pipe 316 to increase the air pressure, and squeezes the block 305 to slide down inside the sliding baffle 304, blocking the air inlet and the opening, so that the exhaust device can no longer exhaust air, and the air pressure in the two monitoring spaces set inside the monitoring box 1 will be maintained at a constant low pressure. It should be noted that in the process of exhausting air to reduce the air pressure inside the monitoring box 1, it is necessary to operate at room temperature. Temperature changes will cause unstable air pressure values; It should also be noted that, when the lifting plate 308 is driven to slide downward, the sealing baffle 319 will be driven to slide airtightly on the outer wall of the lifting box 307 to prevent external air from entering the monitoring box 1. When the lifting frame 203 is driven downward by the vacuum device to evacuate air, the sealing plate 212 will rotate relatively due to the elastic force of the coil spring and contact the upper end surface of the monitoring box 1, and the iron sheet 215 will be adsorbed together with the magnetic strip 214, which can effectively prevent external air from entering the monitoring box 1 and causing the internal air pressure of the monitoring box 1 to change. When the air pressure values ​​in the two monitoring spaces set inside the monitoring box 1 are maintained at a constant low pressure, if the air pressure in the monitoring space does not change, it means that the fixed battery pack has no leakage and the sealing performance of the battery pack is good. When the air pressure in the monitoring space increases, it means that the battery pack has leakage and there is a problem with the sealing performance of the battery pack. After the air pressure in the monitoring space changes, the difference with the external air pressure gradually decreases. The air pressure in the monitoring space cannot overcome the elastic force of the first spring 206 to keep the lifting frame 203 and the airbag 204 inside the monitoring box 1. The lifting frame 203 and the airbag 204 will slide to the outside of the monitoring box 1 through the slide groove and stop squeezing the connecting tube 317. The volume of the airbag 204 will decrease accordingly due to the gradual decrease in the difference between the air pressure in the monitoring space and the external air pressure. The pigment drawn into the interior due to the expansion of the airbag 204 will flow back from the inside of the airbag 204 through the conveying pipe 207 to the transparent tube 209 due to the decrease in the air pressure in the airbag 204. Therefore, it is possible to judge whether the battery pack fixedly installed in the corresponding monitoring space is leaking by observing the flow rate of the pigment in the transparent tube 209, and the flow rate of the pigment is proportional to the air pressure in the monitoring space and the leakage condition of the battery pack. 3. Secondary monitoring: When the air pressure in the monitoring space changes, the third spring 309 stretched by the change in air pressure will drive the lifting plate 308 to slide upward in the lifting box 307 in an airtight manner, and drive the bellows expansion tube 313 to extend and expand. The chemical gas discharged into the space between the block 305 and the sliding baffle 304 through the vent pipe 316 will flow into the upper air cavity through the connecting pipe 317. The gas sensor arranged in the upper air cavity will detect the chemical gas and generate an electrical signal. The controller controls the alarm light 102 to sound an alarm through the generated electrical signal, thereby judging the change in the air pressure in the monitoring space and judging the leakage of the battery pack. It should be emphasized that before the air pressure in the monitoring space is reduced and the lifting frame 203 is driven to slide and descend on the inner walls of the outer fixing frame 201 and the inner fixing frame 202 to squeeze the connecting tube 317, the carbon dioxide gas has not entered the bellows expansion tube 313 (the connecting tube 317 is squeezed and the gas cannot flow). After the lifting frame 203 slides and descends on the inner walls of the outer fixing frame 201 and the inner fixing frame 202 to squeeze the connecting tube 317, the valve 315 is opened to inject carbon dioxide gas into the bellows expansion tube 313 through the connecting tube 314, and then the valve 315 is closed. In the case where the air pressure in the monitoring space increases due to leakage of the battery pack, the lifting frame 203 will drive the airbag 204 to slide and rise on the inner walls of the outer fixing frame 201 and the inner fixing frame 202 due to the increase in air pressure, and the lifting plate 308 will also slide and rise in the lifting box 307 due to the increase in air pressure in the monitoring space. The resilience of the spring 309 is lower than that of the first spring 206 (the third spring 309 can be made of a high damping alloy material. The alloy or composite material with a high damping property can absorb more energy, thereby slowing down the rebound speed of the third spring 309. These materials can effectively consume part of the energy when subjected to force, reduce the rebound speed, and slow down the rebound speed in the process of releasing the compressed kinetic energy due to the significant material damping effect or energy dissipation mechanism), the rising speed of the lifting plate 308 is lower than the rising speed of the lifting frame 203, and the bellows 313 will be in a compressed state due to the slow rising speed of the lifting plate 308. When the internal air pressure of the monitoring box 1 decreases, the chemical gas between the block 305 and the sliding baffle 304 will preferentially enter the upper air cavity of the airbag 204 through the connecting pipe 317, and then be detected by the gas sensor to determine whether the battery pack has a leak. By monitoring the battery pack leakage device; First, the pigment is driven to flow in the transparent tube 209 by the change of negative pressure, and the operator can directly observe the change of liquid level to judge the fault; Second, it combines mechanical (pigment flow) and electronic (gas sensor) dual detection: pigment flow provides a preliminary leak indication, and the gas sensor triggers a secondary alarm, which can form a redundant protection. By linking the gas sensor with the controller, changes in gas composition in the upper air cavity of the airbag can be monitored in real time. When a battery pack leaks and causes negative pressure imbalance in the monitoring space, gas (such as carbon dioxide) enters the upper air cavity through the connecting tube. The gas sensor immediately identifies abnormal gas concentration and triggers a secondary electronic alarm. This design enables accurate qualitative analysis of leaked gas and can effectively distinguish between environmental interference and real leakage events.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photovoltaic power generation and energy storage equipment safety monitoring device, characterized in that: include: A monitoring box (1), wherein two alarm lights (102) are symmetrically mounted on an upper end surface of the monitoring box (1), the alarm lights (102) being electrically connected to a controller, and one side of the monitoring box (1) being connected to an external pipe (101), the external pipe (101) being connected to an exhaust device; A negative air pressure component (2), the negative air pressure component (2) comprising a lifting frame (203) symmetrically arranged inside the monitoring box (1), the lifting frame (203) being driven to be lifted inside the monitoring box (1), an air bag (204) being fixedly mounted on the inner wall of the lifting frame (203), the air bag (204) having an upper air cavity and a lower air cavity, a gas sensor being fixedly mounted on the inner wall of the upper air cavity, the gas sensor being electrically connected to a controller, two transparent tubes (209) being arranged on one side of the monitoring box (1) and below the external tube (101), the transparent tubes (209) being filled with pigment; A monitoring component (3), the monitoring component (3) comprising a partition block (302) fixed to the inner wall of the monitoring box (1), the partition block (302) dividing the interior of the monitoring box (1) into two monitoring spaces, an inner cavity (303) is provided inside the partition block (302), through holes are provided on the inner walls on both sides of the inner cavity (303), and a blocking block (305) driven to rise and fall is provided on the inner wall of the inner cavity (303) and at a position corresponding to the through hole.

2. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 1, characterized in that: The upper end surface of the monitoring box (1) is symmetrically provided with a slide groove, the lifting frame (203) is airtightly slidably connected to the slide groove, an external fixing frame (201) is fixedly installed on the upper end surface of the monitoring box (1) at a position corresponding to the slide groove, an internal fixing frame (202) is fixedly installed on the inner top of the monitoring box (1) at a position corresponding to the slide groove, the lifting frame (203) is slidably connected to the external fixing frame (201) and the internal fixing frame (202), a compression tank (205) is embedded in the inner bottom end of the internal fixing frame (202), a first spring (206) is fixedly installed between the compression tank (205) and the lifting frame (203), the lower end surface of the airbag (204) is connected to a delivery pipe (207), the lower end of the delivery pipe (207) passes through the lifting frame (203), the compression tank (205), the monitoring box (1) and is connected to a transparent tube (209).

3. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 2, characterized in that: A fixing frame (208) is symmetrically mounted on the outer wall of the monitoring box (1), and the fixing frame (208) is fixedly connected to the outer wall of the transparent tube (209). Two pairs of rotating seats (210) are symmetrically fixedly mounted on the upper end surface of the monitoring box (1) and on both sides of the outer fixing frame (201). A rotating shaft (211) is rotatably mounted between each pair of the rotating seats (210). A sealing plate (212) is fixedly mounted on the outer wall of the rotating shaft (211). Iron sheets (215) are fixedly mounted on both sides of the sealing plate (212). A magnetic strip (214) is embedded on the upper end surface of the monitoring box (1) and at a position corresponding to the iron sheet (215). A mounting ring (213) is fixedly mounted on the opposite side of the rotating seat (210), and a coil spring is arranged inside the mounting ring (213). The inner and outer ends of the coil spring are respectively fixedly connected to the mounting ring (213) and the rotating shaft (211).

4. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 3, characterized in that: A spring retaining switch (301) is fixedly installed at the inner bottom end of the inner fixing frame (202), and the spring retaining switch (301) is electrically connected to the controller. A sliding baffle (304) is fixedly installed on the inner wall of the inner cavity (303) and at the corresponding through hole. An air inlet hole is opened at the lower position of the outer wall of the sliding baffle (304). The blocking block (305) is airtightly slidably connected to the sliding baffle (304), and a second spring (306) is fixedly installed between the blocking block (305) and the sliding baffle (304).

5. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 4, characterized in that: A lifting box (307) is fixedly mounted on the inner top of the monitoring box (1); a lifting plate (308) is airtightly slidably mounted on the inner wall of the lifting box (307); a sealing baffle (319) is fixedly mounted on the upper end surface of the lifting plate (308); the sealing baffle (319) is airtightly slidably connected to the lifting box (307); two cavities (312) are symmetrically formed inside the spacer (302) and above the inner cavity (303); and a corrugated A telescopic tube (313), the interior of the bellows telescopic tube (313) is filled with gas, the outer wall of the bellows telescopic tube (313) is fixedly connected to the lifting plate (308) at an upper position, the upper end surface of the bellows telescopic tube (313) is connected to a connecting tube (314), the upper end of the connecting tube (314) passes through the spacer (302) and the monitoring box (1) and is installed with a valve (315), and the bellows telescopic tube (313) is connected to the sliding baffle (304) via a vent pipe (316).

6. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 5, characterized in that: An air inlet (318) is provided inside the monitoring box (1) and the lifting box (307); a third spring (309) is fixedly installed between the lifting plate (308) and the lifting box (307); an outer wall of the ventilation pipe (316) is connected to a connecting pipe (317); an upper end of the connecting pipe (317) passes through the spacer (302), the lifting frame (203), the air bag (204), and is connected to the upper air cavity.

7. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 6, characterized in that: A support rod (310) is fixedly mounted on the inner top end of the lifting box (307), an electromagnet (311) is fixedly mounted on the lower end of the support rod (310), the electromagnet (311) is electrically connected to the controller, and the electromagnet (311) is magnetically matched with the lifting plate (308).

8. A photovoltaic power generation and energy storage equipment safety monitoring device according to claim 1, characterized in that: The monitoring box (1) further comprises a fixing assembly (4), the fixing assembly (4) comprising a base (401) fixed to the lower end surface of the monitoring box (1), a partition plate (402) fixedly mounted between the base (401) and the monitoring box (1), a slide rail (403) symmetrically mounted on the upper end surface of the base (401), a bearing frame (404) slidably mounted on the upper end surface of the slide rail (403), a fixing pipe (405) connected to the lower end surface of the monitoring box (1) at a position corresponding to the bearing frame (404), a lifting pipe (406) slidably mounted on the outer wall of the fixing pipe (405), and a conical sleeve (407) threadedly mounted on the outer wall of the lifting pipe (406).

Images