Intelligent lithium battery storage fire-fighting water tank system and fire-fighting water tank

Abstract

The invention discloses an intelligent lithium battery storage fire-fighting water tank system and a fire-fighting water tank, and relates to the technical field of lithium battery thermal management, and the intelligent lithium battery storage fire-fighting water tank system comprises a place where a suspected fire hazard is found; the stacking machine is moved to the place with the fire hazard for shooting; judging whether a fire disaster exists according to the shooting content; determining that the fire occurs in the place with the fire hazard; the stacking machine forks the fire source battery and puts the fire source battery into the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished. According to the technical scheme, the fire handling efficiency and handling capacity in lithium battery storage are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery thermal management, in particular to an intelligent lithium battery storage fire-fighting water tank system and a fire-fighting water tank. BACKGROUND

[0002] With the rapid development of new energy industry, lithium batteries are widely used in energy storage systems, electric vehicles and various portable electronic devices due to their high energy density, long cycle life and other advantages. Correspondingly, the safety problem of lithium batteries in the storage, transportation and centralized storage links is increasingly prominent. Since lithium batteries themselves use organic electrolyte and contain high-activity electrode materials, they are prone to cause severe burning or even explosion under thermal runaway conditions, and their fire shows completely different combustion characteristics from traditional flammable materials: high combustion temperature, accompanied by the release of a large amount of toxic gas, easy to cause chain reaction to form a "domino effect", leading to rapid spread of fire in a short time.

[0003] At present, the fire-fighting means for lithium battery storage still mainly relies on traditional fire-fighting systems, mainly including gas fire extinguishing system, water spray system and foam fire extinguishing system, etc. However, these traditional schemes have exposed significant defects in actual application. The three modules of detection, alarm and fire extinguishing run independently, cannot realize data sharing and linkage response, resulting in low efficiency in dealing with fire. SUMMARY

[0004] The main purpose of the present application is to provide an intelligent lithium battery storage fire-fighting water tank system, which aims to improve the disposal efficiency of fire in lithium battery storage.

[0005] To achieve the above purpose, the intelligent lithium battery storage fire-fighting water tank system provided by the present application comprises:

[0006] finding a place suspected to have fire hazards;

[0007] moving the stacker to the place with fire hazards to take pictures;

[0008] judging whether there is fire according to the shooting content;

[0009] determining that the place with fire hazards has a fire;

[0010] putting the fire source battery into the fire-fighting water tank by the stacker fork to extinguish the fire until the fire source battery is extinguished.

[0011] In an embodiment, the step of finding a place suspected to have fire hazards comprises:

[0012] sensing whether the temperature in the storage library abnormally changes;

[0013] sensing whether smoke is generated in the storage library;

[0014] The intelligent AI camera automatically captures a suspected fire scene and performs zoom-in analysis.

[0015] In an embodiment, the step of determining whether a fire exists according to the captured content comprises:

[0016] The central control system determines whether a fire exists;

[0017] Manual intervention determines whether a fire exists.

[0018] In an embodiment, the step of the stacker picking up the fire source battery and placing it into the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished comprises:

[0019] The stacker picks up the fire source battery and places it into the fire-fighting water tank, while water is injected into the fire-fighting water tank;

[0020] The fire source battery is placed into the water in the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished.

[0021] In an embodiment, the step of the stacker picking up the fire source battery and placing it into the fire-fighting water tank, while water is injected into the fire-fighting water tank comprises:

[0022] The fire-fighting water tank is injected with water to a first liquid level;

[0023] The step of the fire source battery being placed into the water in the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished comprises:

[0024] The fire-fighting water tank bracket falls, the fire source battery is placed into the water, and the fire-fighting water tank is injected with water to a second liquid level.

[0025] In an embodiment, the step of the fire source battery being placed into the water in the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished comprises:

[0026] The water temperature in the fire-fighting water tank reaches a critical value, the upper part of the fire-fighting water tank is injected with normal temperature water, and the lower part of the fire-fighting water tank is drained.

[0027] The application also provides a fire-fighting water tank applied to the intelligent lithium battery storage fire-fighting water tank system, which comprises a tank body, a water injection electromagnetic valve, a drainage electromagnetic valve, and a bracket.

[0028] In an embodiment, the fire-fighting water tank further comprises a tank cover, which is detachably connected to the bracket and is configured to completely cover the opening of the tank body after the bracket enters the tank body.

[0029] In an embodiment, the fire-fighting water tank further comprises a liquid level sensor and a temperature sensor, both of which are arranged in the tank body; the liquid level sensor is electrically connected to the water filling electromagnetic valve, and the temperature sensor is electrically connected to the water filling electromagnetic valve and the water draining electromagnetic valve respectively.

[0030] In an embodiment, the fire-fighting water tank further comprises a liquid level observation window, which is arranged in the tank body and is configured to allow a user to observe the water level in the tank body.

[0031] In the technical solution of the present application, the intelligent lithium battery storage fire-fighting water tank system includes discovering a location suspected to have a fire hazard; a stacker moves to the location suspected to have a fire hazard to take a picture; it is determined whether there is a fire according to the picture content; it is determined that a fire has occurred at the location suspected to have a fire hazard; the stacker forks the fire source battery and puts it into the fire-fighting water tank for fire extinguishing until the fire source battery is extinguished. In the technical solution of the present application, the intelligent lithium battery storage fire-fighting water tank system realizes fire detection and fire extinguishing through multiple steps. First, the system discovers a location suspected to have a fire hazard through temperature sensing and smoke sensing devices. When an abnormality is detected, the stacker automatically moves to the location to take a picture. The picture content is transmitted to the central control system or a manual operator for analysis to determine whether there is indeed a fire. If it is determined that a fire has occurred, the stacker will fork the fire source and put it into the fire-fighting water tank for fire extinguishing. The fire-fighting water tank is filled with water and the fire source is submerged until the fire source is completely extinguished. The present application realizes rapid detection and accurate fire extinguishing of lithium battery storage fires. The system integrates environmental monitoring, mobile fire extinguishing, and immersion cooling functions, greatly shortening the fire confirmation and response time. The mobility of the stacker enables the fire extinguishing equipment to accurately reach the fire source location, avoiding the problem of insufficient coverage of traditional fixed fire extinguishing systems. Submerging the fire battery completely in the cooling liquid can effectively block the supply of oxygen and rapidly cool down, preventing the spread of thermal runaway. This targeted fire extinguishing method improves the fire extinguishing efficiency, and the entire process is highly automated, reducing human judgment errors and operation delays, providing more reliable protection for lithium battery storage safety. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings from the structures shown in these drawings without creative labor.

[0033] Figure 1 Flow chart of an embodiment of the intelligent lithium battery storage fire-fighting water tank system provided by the present application;

[0034] Figure 2 Structural schematic diagram of an embodiment of the fire-fighting water tank provided by the present application.

[0035] Explanation of reference numerals:

[0036] 1000 Fire water tank 5 Water level viewing window 1 Tank body 6 Tank lid 1a Water filling port 7 Cylinder 1b Drain port 8 Overflow pipe 2 Water filling solenoid valve 9 Water level sensor 3 Drain solenoid valve a Fire source battery 4 Carriage

[0037] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0040] In addition, if the embodiments of the present application involve descriptions such as “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope of the present application.

[0041] With the rapid development of new energy industry, lithium batteries are widely used in energy storage systems, electric vehicles and various portable electronic devices due to their high energy density, long cycle life and other advantages. Correspondingly, the safety problem of lithium batteries in the process of storage, transportation and centralized storage is increasingly prominent. Because lithium batteries themselves use organic electrolyte and contain high-activity electrode materials, they are prone to cause severe combustion or even explosion under thermal runaway conditions, and their fire shows completely different combustion characteristics from traditional combustible materials: high combustion temperature, accompanied by release of a large amount of toxic gas, easy to cause chain reaction to form "domino effect", leading to rapid spread of fire in a short time.

[0042] At present, the fire-fighting means for lithium battery storage is still mainly based on traditional fire-fighting system, mainly including gas fire extinguishing system, water spray system and foam fire extinguishing system. However, these traditional schemes have exposed significant defects in actual application. The three modules of detection, alarm and fire extinguishing operate independently, cannot realize data sharing and linkage response, resulting in low efficiency of dealing with fire.

[0043] To solve the above problems, the present application provides an intelligent lithium battery storage fire-fighting water tank system, Figure 1 The structure diagram of the embodiment of the intelligent lithium battery storage fire-fighting water tank system provided by the present application is shown.

[0044] Please refer to Figure 1 The present application provides an intelligent lithium battery storage fire-fighting water tank system, which includes discovering a place suspected to have fire hazards; moving a stacker to the place with fire hazards to take pictures; judging whether there is fire according to the picture content; determining that the place with fire hazards has a fire; and putting the fire source battery a into the fire-fighting water tank 1000 by the stacker fork to extinguish the fire until the fire source battery a is extinguished.

[0045] Among them, discovering a place suspected to have fire hazards means locating the potential fire position through a sensor network, which can be realized by monitoring temperature abnormal fluctuation with a temperature sensor and detecting smoke concentration change with a smoke sensor, and the cross verification of multi-dimensional environmental parameters can improve the accuracy of fire warning.

[0046] Among them, moving the stacker to the place with fire hazards to take pictures means implementing fire review through automatic equipment, which can be realized by controlling the stacker travel path with a laser navigation system and carrying out multi-angle image acquisition with a high-definition camera to ensure obtaining real-time visual data on the scene.

[0047] Among them, judging whether there is fire according to the picture content means establishing a double verification mechanism, which can be realized by analyzing flame characteristics with a computer vision algorithm and manually reviewing thermal imaging data remotely to reduce the misjudgment rate through man-machine collaborative decision-making.

[0048] Wherein, the fire hazard location is determined to be on fire refers to establishing a closed-loop confirmation process, which can be achieved by temperature gradient mutation detection and smoke diffusion model to predict the development trend of fire, to ensure the time sequence continuity of fire determination.

[0049] Wherein, the forklift takes the fire source battery a and puts it into the fire-fighting water tank 1000 for extinguishing until it is extinguished refers to implementing a physical isolation fire extinguishing strategy, which can be achieved by using a mechanical arm to accurately position the fire source and a sealed water tank to inject water to submerge the burning object, to terminate the combustion reaction by blocking oxygen supply and rapid cooling.

[0050] In the technical solution of the present application, the intelligent lithium battery storage fire-fighting water tank system realizes fire detection and extinguishing through multiple steps. First, the system discovers a location suspected to have a fire hazard through temperature sensing and smoke sensing devices. When an anomaly is detected, the forklift automatically moves to the location to take a picture. The picture content is transmitted to the central control system or human operators for analysis to determine whether there is indeed a fire. If it is determined that a fire has occurred, the forklift will fork the fire source and put it into the fire-fighting water tank 1000 for extinguishing. The fire-fighting water tank 1000 is filled with water and the fire source is submerged until the fire source is completely extinguished. The present application realizes rapid detection and accurate extinguishing of lithium battery storage fires. The system integrates environmental monitoring, mobile fire extinguishing, and immersion cooling functions, significantly shortening the fire confirmation and response time. The mobility of the forklift enables the fire extinguishing equipment to accurately reach the fire source location, avoiding the problem of insufficient coverage of traditional fixed fire extinguishing systems. Submerging the burning battery completely in the cooling liquid can effectively block oxygen supply and rapidly cool down, preventing thermal runaway from spreading. This targeted fire extinguishing method improves the efficiency of fire extinguishing, the entire process is highly automated, reduces human judgment errors and operation delays, and provides more reliable protection for lithium battery storage safety.

[0051] In an embodiment of the present application, the step of discovering a location suspected to have a fire hazard includes sensing whether the temperature in the storage library abnormally changes; sensing whether smoke is generated in the storage library; an intelligent AI camera automatically takes a picture of the suspected fire scene and performs magnification analysis.

[0052] The temperature sensing is achieved by real-time collection of temperature data in the warehouse through temperature sensors, and a signal is triggered when the temperature change rate exceeds the set threshold or the absolute value reaches the critical value. The smoke sensing is achieved by detecting the concentration of suspended particles in the air through a photoelectric smoke detector, and an alarm signal is generated when the light blocking rate of smoke particles exceeds the preset value. The temperature sensing and smoke sensing use independent circuit arrangements, and the signals are transmitted synchronously to the central control system through a logic AND gate circuit, and only when both temperature and smoke are abnormal at the same time is it determined as a suspected fire. The intelligent AI camera obtains real-time images of the suspected area through the image acquisition module, and further identifies the heat source distribution, flame profile and smoke diffusion pattern in the image through image processing algorithms. The magnification analysis focuses on the abnormal area using digital zoom technology, and combines edge detection and texture analysis to extract high-resolution detail information, such as local temperature gradient changes or combustion product particle characteristics.

[0053] Specifically, the temperature sensor is installed at the gap between the top of the shelf and the lithium battery stack, and the monitoring point spacing is not more than two meters. When it is detected that the temperature in the local area rises by more than twenty degrees Celsius in five minutes or the absolute value reaches sixty degrees Celsius, a temperature sensing abnormal signal is triggered. The smoke detector is arranged below the ventilation opening at the top of the warehouse, and uses a scattered light detection principle. When the smoke particle concentration causes the light attenuation rate to exceed 5%, a smoke sensing abnormal signal is triggered. After comparing the temperature sensing signal and the smoke sensing signal through the central control system, if both signals are triggered within thirty seconds, it is determined that there is a fire hazard, and the stacker moving program is started. Through the double detection mechanism, single signal abnormalities caused by equipment false triggering or environmental interference are effectively excluded, improving the accuracy and timeliness of fire identification. When the temperature sensing or smoke sensing triggers a warning signal, the intelligent AI camera immediately starts the shooting program, its wide-angle lens covers the preset monitoring area, and the optical sensor captures dynamic images at a rate of 30 frames per second. The image processing unit performs motion detection on consecutive frames, locks the temperature abnormal area, and starts 10 times digital zoom to increase the pixel density of the target area to 400 dpi. The magnified image is analyzed by a convolutional neural network to identify the characteristic jet-shaped flame pattern and white smoke characteristics of lithium battery thermal runaway, generating a fire determination result with a confidence level of more than 85%. The visual data and temperature sensing and smoke sensing data are multi-modal fused in the central control system, reducing the fire confirmation response time to within 8 seconds and the false alarm rate to below 2%.

[0054] The steps of finding the location suspected to have fire hazards include sensing abnormal temperature changes in the warehouse. Multiple temperature sensors are installed in the warehouse, distributed in different areas and heights. The temperature sensors monitor the ambient temperature in real time and transmit the data to the central control system. The central control system sets a normal temperature range, for example, 15-30℃. When any sensor detects a temperature beyond this range and the temperature change rate exceeds a preset threshold (such as 1℃ per minute), the system determines that there is an abnormal temperature change. Smoke sensing whether smoke is generated in the warehouse. Photoelectric smoke detectors are installed in the warehouse. The detectors detect smoke particles in the air to determine whether smoke is generated. When the concentration of smoke particles reaches a certain level, for example, 0.1 mg per cubic meter of air, the smoke detector sends an alarm signal. Through the above technical solutions, the application can timely find the fire hazards in the warehouse. The dual monitoring of temperature sensing and smoke sensing improves the accuracy of fire warning and reduces the possibility of false alarms. At the same time, real-time monitoring and automatic alarm functions shorten the time of discovering fire, gain valuable time for the implementation of subsequent fire extinguishing measures, and effectively reduce the loss risk caused by fire. The intelligent AI camera can be installed on the top or wall of the warehouse to cover the entire warehouse space. When the temperature sensing or smoke sensing device detects an anomaly, the intelligent AI camera will automatically start and take pictures of the suspected fire area. After taking pictures, the camera will transmit the images to the image processing unit. The image processing unit first preprocesses the original images, including denoising, contrast enhancement, etc. Then, the image magnification algorithm is used to magnify the suspected fire source area to obtain more detailed information. The magnified image will be sent to the fire identification model for analysis. The model is trained on a large amount of fire scene data and can identify fire features such as flames and smoke. Finally, the analysis result will be sent to the central control system as one of the important bases for judging whether there is a fire. Through the above technical solutions, the application can improve the accuracy and timeliness of fire detection. The automatic shooting function of the intelligent AI camera can quickly capture suspected fire scenes, and the image magnification analysis can provide more detailed information, which helps to accurately determine whether there is a fire. This method can reduce the false alarm rate and also can discover potential fire hazards earlier to gain valuable time for subsequent fire extinguishing operations. In addition, this scheme can reduce the need for manual inspection, improve the efficiency and safety of warehouse management.

[0055] In an embodiment of the application, the step of determining whether there is a fire according to the shooting content includes determining whether there is a fire by the central control system and determining whether there is a fire by manual intervention.

[0056] The central control system analyzes the flame features and smoke patterns in the shooting content through an image recognition algorithm to generate a preliminary judgment result, and the manual intervention receives the alarm information through the terminal device and retrieves the real-time image for review and confirmation. The two form a double verification mechanism, and the central control system and the manual terminal realize information synchronous transmission through a data interface. When the system judgment confidence is lower than the set threshold, the manual review process is automatically triggered.

[0057] Specifically, after the image data shot by the stacker is uploaded to the central control system in real time, the system first extracts the flame color distribution, smoke diffusion speed and other characteristic parameters, and compares and analyzes them with the preset fire model. If the feature matching degree reaches more than 85%, it is determined that there is a fire, at which time the system sends a start command to the fire water tank 1000; if the matching degree is in the interval of 60% to 85%, the system pushes the alarm information and image data to the manual terminal, and the operator observes the burning material pattern change trajectory through magnification, and finally confirms it combined with the warehouse environment parameters. When the system determines that the matching degree is lower than 60%, the possibility of fire is automatically excluded to avoid false triggering of the fire extinguishing program. This judgment mechanism triggers the corresponding response mode by setting different confidence intervals, which not only ensures the timeliness of fire identification, but also effectively prevents false operation through manual review.

[0058] According to the shooting content, whether there is a fire includes two steps: the central control system determines whether there is a fire and manual intervention determines whether there is a fire. Specifically, the central control system first receives the image data shot by the stacker. The central control system has an image recognition algorithm built-in, which analyzes and processes the received image. The algorithm preliminarily determines whether there is a fire by detecting features such as flames and smoke in the image. Further, if the central control system's judgment result is uncertain, the system will transmit the image to the monitoring center for manual judgment by the on-duty personnel. The on-duty personnel can view the image details through the high-definition display screen and make a final judgment on whether there is a fire based on experience. Therefore, by combining automatic judgment by the central control system with manual intervention, the accuracy and reliability of fire judgment can be improved. Through the above technical solution, the accuracy and timeliness of fire judgment can be effectively improved. The automatic judgment of the central control system can quickly process a large amount of image data, realizing rapid preliminary screening of fires. Manual intervention can review and supplement the system's judgment results to avoid misjudgment and omission. The combination of the two ensures the judgment efficiency and improves the judgment accuracy, thereby providing a reliable basis for the timely implementation of subsequent fire extinguishing measures.

[0059] In an embodiment of the present application, the step of placing the fire source battery a into the fire water tank 1000 by the stacker fork to extinguish the fire until the fire source battery a is extinguished includes placing the fire source battery a into the fire water tank 1000 by the stacker fork, and simultaneously injecting water into the fire water tank 1000; placing the fire source battery a into the water in the fire water tank 1000 to extinguish the fire until the fire source battery a is extinguished.

[0060] Wherein the fire-fighting water tank 1000 is filled with water to the first water level to ensure the initial submersion of the fire source; after the bracket 4 falls, the fire source sinks further, at which time the water is filled to the second water level to make the fire source completely submerged. When the water temperature reaches the critical value, the upper part injects normal temperature water to lower the temperature, and the lower part discharges high temperature water to maintain the stability of the fire extinguishing environment.

[0061] Specifically, after the stacker puts the fire source into the water tank, the water injection electromagnetic valve 2 is opened to inject water into the tank 1 to the first water level, at which time the fire source is partially submerged in water. The bracket 4 automatically falls under the action of gravity, and the fire source sinks to a deeper position, and the water injection electromagnetic valve 2 continues to work until the water level rises to the second water level to ensure that the fire source is completely covered with water. During the fire extinguishing process, the temperature sensor monitors the water temperature in real time, and if it exceeds the preset critical value, the water injection electromagnetic valve 2 opens the upper water inlet to inject normal temperature water, and the water discharge electromagnetic valve 3 synchronously opens the lower water outlet 1b to discharge high temperature water. By dynamically adjusting the water temperature, the fire source is prevented from reigniting due to local high temperature, and at the same time the water circulation in the water tank is maintained to improve the fire extinguishing efficiency.

[0062] The stacker fork takes the fire source battery a and puts it into the fire-fighting water tank 1000, and at the same time the fire-fighting water tank 1000 is filled with water. Specifically, the stacker moves to the fire location and grabs the burning lithium battery through the fork arm. The fire-fighting water tank 1000 is moved to the designated position in advance and starts to fill water. The stacker puts the fire source into the fire-fighting water tank 1000, and the water level gradually rises. The fire source battery a is extinguished by being put into the water in the fire-fighting water tank 1000. Further, the water level in the fire-fighting water tank 1000 continues to rise to completely submerge the fire source. A temperature sensor is arranged in the water tank to monitor the water temperature in real time. When the water temperature reaches the preset threshold, normal temperature water is injected into the upper part and high temperature water is discharged from the lower part to form a circulating cooling. The fire extinguishing process continues until the fire source is completely extinguished and no smoke or bubbles are generated. Through the above technical solution, the present application realizes rapid positioning and accurate fire extinguishing of the lithium battery fire. The stacker can quickly reach the fire location and transfer the fire source to the fire-fighting water tank 1000, avoiding the spread of the fire. The water in the fire-fighting water tank 1000 submerges the fire source, effectively isolating oxygen and absorbing heat. The circulating cooling mechanism of the water tank continuously lowers the temperature of the fire source to prevent reignition. Compared with the traditional spraying or gas fire extinguishing system, this method is more targeted, uses less water, and reduces water damage. Therefore, the present application improves the efficiency and reliability of lithium battery storage fire fighting.

[0063] In an embodiment of the present application, the step of putting the fire source battery a into the water in the fire-fighting water tank 1000 to extinguish the fire source battery a includes that the water temperature in the fire-fighting water tank 1000 reaches a critical value, the upper part of the fire-fighting water tank 1000 injects normal temperature water, and the lower part of the fire-fighting water tank 1000 discharges water.

[0064] The temperature sensor monitors the water temperature in the water tank in real time. When the detected water temperature exceeds the preset critical value, the water injection electromagnetic valve 2 is triggered to open the upper water injection port 1a, and the external water source injects normal temperature water into the upper part of the water tank through the water injection port 1a. At the same time, the drain electromagnetic valve 3 is triggered to open the lower drain port 1b, and the high-temperature water is discharged from the bottom of the water tank. The critical value is set to 60-80℃, and the specific value is adjusted according to the lithium battery combustion characteristics. The upper water injection and the lower water discharge form a dynamic cycle, and the overall water temperature is reduced through the layered displacement of cold and hot water. Specifically, the temperature sensor, the water injection electromagnetic valve 2 and the drain electromagnetic valve 3 form a closed loop control. When the water temperature in the water tank reaches the critical value due to the accumulation of heat from the fire source, the temperature sensor sends a signal to the control system, the water injection electromagnetic valve 2 is opened to make the normal temperature water flow into the top of the water tank, and at the same time the drain electromagnetic valve 3 is opened to make the high-temperature water discharge from the bottom. During the layered displacement process of cold and hot water, the injected normal temperature water covers the surface of the fire source to form a cooling layer, and continuously absorbs heat until the fire source is extinguished. This process maintains the water temperature in the water tank within a safe range, avoids the decrease of fire extinguishing efficiency or the damage of the tank body 1 structure due to the high water temperature, and prevents the diffusion of high-temperature water vapor to cause secondary risks.

[0065] The water temperature in the fire-fighting water tank 1000 is monitored in real time by the temperature sensor. When the water temperature reaches the preset critical value, for example, 85℃, the control system automatically triggers the water injection and drainage program. The water injection electromagnetic valve 2 at the upper part of the fire-fighting water tank 1000 is opened, and the normal temperature water flows in from the water injection port 1a. At the same time, the drain electromagnetic valve 3 at the lower part of the fire-fighting water tank 1000 is also opened, and the high-temperature water is discharged from the drain port 1b. The flow rates of water injection and drainage are kept balanced to maintain the water level in the water tank stable. This process continues until the water temperature drops to a safe range, for example, below 50℃. The entire cooling cycle is automatically managed by the control system without manual intervention. Through the above technical solution, the application realizes the automatic adjustment of the water temperature in the fire-fighting water tank 1000. When the water temperature is too high, the overall temperature in the water tank is quickly reduced by injecting normal temperature water and discharging high-temperature water. This method avoids the evaporation loss and pressure increase that may be caused by the continuous increase of water temperature, and ensures the continuous progress of the fire extinguishing process. At the same time, the stable water temperature also helps to prevent the lithium battery from re-thermal runaway, and improves the efficiency and safety of fire extinguishing.

[0066] The application also proposes a fire-fighting water tank 1000 which is applied to the intelligent lithium battery storage fire-fighting water tank system proposed in the application. Other embodiments or specific implementation manners of the fire-fighting water tank 1000 of the application can refer to the above-mentioned method embodiments, which will not be described here again.

[0067] Please refer to Figure 2In an embodiment of the present application, the fire-fighting water tank 1000 comprises a tank body 1, a water filling electromagnetic valve 2, and a water draining electromagnetic valve 3. The tank body 1 is provided with a water filling port 1a and a water draining port 1b. The water filling port 1a is used to connect an external water source, and the water draining port 1b is used to drain water in the tank body 1. The water filling electromagnetic valve 2 is arranged at the water filling port 1a and is used to control the opening and closing of the water filling port 1a. The water draining electromagnetic valve 3 is arranged at the water draining port 1b and is used to control the opening and closing of the water draining port 1b.

[0068] The tank body 1 is connected to an external water supply pipeline through the water filling port 1a, and the water draining port 1b is connected to a waste water discharge channel. The water filling electromagnetic valve 2 adopts a bidirectional electromagnetic driving structure, and its opening and closing action is triggered by a pulse signal sent by a liquid level sensor. The water draining electromagnetic valve 3 contains a pressure balancing device, which can automatically release pressure when the pressure difference between the inside and outside of the tank body 1 exceeds a threshold value. The liquid level sensor contains two independent probes corresponding to the detection heights of the first liquid level and the second liquid level, and the distance between the two probes is 15% to 20% of the height of the tank body 1. The temperature sensor is arranged in the form of a thermocouple array on the inner wall of the tank body 1, the distance between the measurement points is 10 cm, and the measurement error is controlled within ±2℃.

[0069] Specifically, when the fire source battery a is put into the tank body 1, the liquid level sensor monitors the water level change in real time and sends instructions to the water filling electromagnetic valve 2. When the water level is lower than the preset first liquid level, the water filling electromagnetic valve 2 is opened to replenish water; when the second liquid level is reached, the water filling electromagnetic valve 2 is closed to stop water filling. The temperature sensor continuously monitors the water temperature in the tank, and when it is detected that the water temperature exceeds a critical value, the water filling electromagnetic valve 2 is opened to inject normal temperature water, and at the same time the water draining electromagnetic valve 3 is opened to drain high temperature water. In this process, the data of the liquid level sensor and the temperature sensor are transmitted to the electromagnetic valve controller through parallel signals to ensure the timing synchronization of the water filling and water draining actions. For example, when the water temperature reaches 80℃, the water filling electromagnetic valve 2 injects 20℃ normal temperature water at a flow rate of 5L / min, and the water draining electromagnetic valve 3 drains high temperature water at the same flow rate, until the water temperature falls below 50℃. This linkage control mechanism keeps the water temperature in the tank body 1 within the effective range of fire extinguishing at all times, avoiding the risk of rekindling due to excessively high water temperature.

[0070] As a preferred embodiment, the scheme of the application is implemented as follows: the box 1 is made of 304 stainless steel, the top is provided with a cylindrical water inlet 1a, and the bottom of the side wall is provided with a trapezoidal water outlet 1b. The water injection electromagnetic valve 2 is connected to the front end of the water inlet 1a through a flange, and the coil winding thereof is electrically connected with the PLC controller; the water drainage electromagnetic valve 3 adopts a butterfly valve structure and is fixed at the end of the water outlet 1b through bolts. The liquid level sensor adopts a capacitive sensing probe and is vertically installed on the inner side wall of the box 1, with the probe bottom being 10 cm away from the bottom surface of the box 1; the temperature sensor selects a PT100 platinum resistance and is horizontally fixed on the middle part of the inner wall of the box 1. The signal output end of the liquid level sensor is connected with the relay module of the water injection electromagnetic valve 2 through a shielded cable, and the signal line of the temperature sensor is connected with the PID control module of the water injection electromagnetic valve 2 and the water drainage electromagnetic valve 3 respectively. When the liquid level is lower than the set threshold, the liquid level sensor triggers the water injection electromagnetic valve 2 to open; when the water temperature exceeds 60℃, the temperature sensor synchronously starts the water injection electromagnetic valve 2 to inject normal temperature water and activates the water drainage electromagnetic valve 3 to drain the high temperature water at the bottom.

[0071] Through the above technical scheme, the application realizes the automatic water level and temperature regulation of the fire-fighting water tank 1000, and solves the problem of low fire extinguishing efficiency caused by the fact that the traditional fire-fighting water tank 1000 cannot monitor the water state in real time. The linkage of the liquid level sensor and the electromagnetic valve ensures that the water level covers the fire source during the fire extinguishing process, avoiding the risk of rekindling caused by insufficient water quantity; the cooperative control of the temperature sensor and the double electromagnetic valves effectively reduces the water temperature in the tank, preventing high temperature from causing secondary thermal runaway. The control mode of directly driving the actuator by the sensor signal eliminates the response delay of manual intervention, and forms a closed loop control in the fire extinguishing process.

[0072] In an embodiment of the application, the fire-fighting water tank 1000 further comprises a liquid level sensor and a temperature sensor, both of which are arranged in the box 1; the liquid level sensor is electrically connected with the water injection electromagnetic valve 2, and the temperature sensor is electrically connected with the water injection electromagnetic valve 2 and the water drainage electromagnetic valve 3 respectively; the bracket 4 is movably connected to the box and is configured to lift the fire source battery a to go in and out of the box 1.

[0073] Among them, the liquid level sensor is installed on the side wall or the bottom of the box 1, adopts a capacitive or ultrasonic sensing element, and is used for real-time detection of the water level height in the box 1. The temperature sensor is installed on the bottom or the side wall of the box 1 near the bracket 4 area, adopts a thermocouple or thermistor type sensing element, and is used for monitoring the water temperature change in the fire extinguishing process. The water injection electromagnetic valve 2 is connected with the external water supply pipeline through a flange, and the water drainage electromagnetic valve 3 is connected to the external wastewater treatment system through a pipeline. The output signal of the liquid level sensor forms a closed loop control with the water injection electromagnetic valve 2 through the PLC controller, and the temperature sensor signal controls the opening and closing timing of the water injection electromagnetic valve 2 and the water drainage electromagnetic valve 3 through the PID algorithm.

[0074] The first liquid level is the water level height that can submerge the fire source. When the fire source is detected, water injection to the first liquid level is immediately started. When the fire source is put into the fire-fighting water tank 1000, the water surface is guaranteed to reach the second liquid level, otherwise water injection to the second liquid level is started. The temperature sensor monitors the water temperature in real time. When the temperature exceeds the set critical temperature threshold, the water injection electromagnetic valve 2 is started to inject normal temperature water and the drainage electromagnetic valve 3 is opened to drain the high-temperature water. The data of the liquid level sensor and the temperature sensor are transmitted to the central control system through the RS485 communication protocol, realizing the double-parameter cooperative control of the water level and the water temperature in the fire extinguishing process, effectively preventing the rekindling phenomenon caused by local high temperature, and avoiding the waste of resources caused by excessive water injection.

[0075] The above technical solution realizes real-time closed-loop control of the water level of the fire-fighting water tank 1000 and the water temperature in the fire extinguishing process. When the water consumption in the water tank is caused by the fire extinguishing operation, the liquid level sensor can automatically trigger the water injection operation to ensure sufficient fire extinguishing water. When the water temperature is increased due to continuous fire extinguishing, the temperature sensor can start the water circulation system in time to avoid the decrease of fire extinguishing efficiency caused by the high water temperature. The scheme effectively solves the technical defects that the traditional fire-fighting water tank 1000 cannot dynamically adjust the water level and the water temperature according to the fire extinguishing process. Through the direct linkage control of the sensor and the actuator, the cooling efficiency and the reliability of the fire extinguishing agent supply in the process of lithium battery fire extinguishing are significantly improved.

[0076] In an embodiment of the present application, the fire-fighting water tank 1000 further comprises a tank cover 6, which is detachably connected with the bracket and is configured to cover the opening of the tank body 1 after the bracket 4 enters the tank body 1.

[0077] The tank cover 6 can be quickly opened or removed during fire extinguishing, ensuring the smooth entry of the fire source battery a, and taking into account the flexible switching of daily protection and emergency response, thereby improving the environmental adaptability and reliability of the system. When the bracket 4 carries the fire source battery a into the tank body 1 for fire extinguishing, the tank cover 6 completely covers the opening of the tank body 1, which can isolate the inside of the tank body 1 and prevent external air from entering the tank body 1 to provide oxygen for the fire source battery a to continue burning, thereby enabling faster fire extinguishing. At the same time, since the fire source battery a has the possibility of explosion during fire extinguishing, the tank cover 6 completely covers the opening of the tank body 1, which can provide safety protection to prevent the explosion of the fire source battery a from causing harm to persons or property.

[0078] In an embodiment of the present application, the fire-fighting water tank 1000 further comprises a liquid level observation window 5, which is arranged in the tank body 1 and is configured to enable a user to observe the water level in the tank body 1.

[0079] When the liquid level sensor 9 fails or the electromagnetic valve control fails, the user can visually confirm the water level through the liquid level observation window to avoid misjudgment caused by relying on the electronic system, such as the water level not reaching the fire extinguishing requirement or excessive water injection. The liquid level sensor 9 forms a fire "electronic + manual" double monitoring to improve system reliability.

[0080] In an embodiment of the present application, the box 1 is also provided with an overflow pipe 8, and the overflow pipe 8 is connected to the drain 1b.

[0081] When the liquid level sensor 9 or the water injection electromagnetic valve 2 fails to cause continuous water injection, the water level may exceed the design upper limit; the overflow pipe 8 serves as a physical pressure relief channel and automatically overflows when the water pressure in the box 1 reaches a critical value, which can prevent the box 1 from being deformed or ruptured due to overpressure and prevent secondary risks caused by the accumulation of high-temperature water vapor. If the lithium battery thermal runaway causes the water to boil violently or generate a large amount of steam, the overflow pipe 8 can quickly release the expanding water to prevent the box 1 from overflowing and affecting the storage environment. When the user discovers that the water level is abnormal through the liquid level observation window 5, the user can manually trigger the drainage (drainage electromagnetic valve 3), and the overflow pipe 8 serves as a passive auxiliary drainage channel to accelerate the drainage efficiency.

[0082] In an embodiment of the present application, the fire-fighting water tank 1000 further comprises a bracket and two air cylinders 7, the box 1 is arranged on the bracket, and the two air cylinders 7 are arranged on the bracket and located on opposite sides of the bracket 4; the two air cylinders 7 are configured to synchronously drive the bracket 4 to ascend and descend. The two air cylinders 7 are symmetrically arranged on the two sides of the bracket 4 and synchronously drive the bracket 4 to ascend and descend, so that the fire source battery a is stably and accurately lowered and lifted, and tilting or jamming caused by unilateral stress is avoided; at the same time, the air cylinder 7 can lock the height of the bracket 4, so that the fire source is always in the best immersion position during the fire extinguishing process, and the stability of the mechanical action and the fire extinguishing efficiency are improved.

[0083] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or system that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or system. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or system that includes the element.

[0084] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0085] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and necessary general hardware platform, of course, they can also be realized by hardware, but in many cases the former is a better embodiment.

[0086] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made under the technical concept of the present application, and based on the content of the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. An intelligent lithium battery warehouse fire-fighting water tank system, characterized in that, The application relates to a fire-fighting system for a lithium battery warehouse. The system comprises the following steps: Finding a location suspected of having a fire hazard; Moving a stacker to the location suspected of having a fire hazard to take a picture; Judging whether there is a fire according to the picture; Determining that the location suspected of having a fire hazard has caught fire; 2. The intelligent lithium battery warehouse fire-fighting water tank system of claim 1, wherein, Using the stacker to pick up a fire source battery and put it into a fire-fighting water tank to extinguish the fire until the fire source battery is extinguished. The step of finding a location suspected of having a fire hazard comprises the following steps: Sensing whether the temperature in the warehouse changes abnormally; Sensing whether smoke is generated in the warehouse; 3. The intelligent lithium battery storage fire water tank system of claim 1, wherein, Using an intelligent AI camera to automatically take a picture of a suspected fire scene and perform magnification analysis. The step of judging whether there is a fire according to the picture comprises the following steps: Using a central control system to judge whether there is a fire; 4. The intelligent lithium battery storage fire water tank system of claim 1, wherein, Using manual intervention to judge whether there is a fire. The step of using the stacker to pick up a fire source battery and put it into a fire-fighting water tank to extinguish the fire until the fire source battery is extinguished comprises the following steps: Using the stacker to pick up a fire source battery and put it into a fire-fighting water tank while water is injected into the fire-fighting water tank; 5. The intelligent lithium battery storage fire water tank system of claim 4, wherein, Putting the fire source battery into water in the fire-fighting water tank to extinguish the fire until the fire source battery is extinguished. The step of using the stacker to pick up a fire source battery and put it into a fire-fighting water tank while water is injected into the fire-fighting water tank comprises the following steps: Injecting water into the fire-fighting water tank to a first liquid level. The step of putting the fire source battery into water in the fire-fighting water tank to extinguish the fire until the fire source battery is extinguished comprises the following steps:

6. The intelligent lithium battery storage fire water tank system of claim 4, wherein, Lowering a bracket of the fire-fighting water tank, putting the fire source battery into water, and injecting water into the fire-fighting water tank to a second liquid level. The step of putting the fire source battery into water in the fire-fighting water tank to extinguish the fire until the fire source battery is extinguished comprises the following steps:

7. A fire fighting water tank characterized by, Reaching a critical value of water temperature in the fire-fighting water tank, injecting normal-temperature water into an upper part of the fire-fighting water tank, and draining water from a lower part of the fire-fighting water tank.

8. The fire fighting water tank of claim 7, wherein, The fire-fighting water tank is applied to the intelligent lithium battery warehouse fire-fighting water tank system according to any one of claims 1 to 6; the fire-fighting water tank comprises a tank body, a water injection electromagnetic valve, a water drainage electromagnetic valve, and a bracket; the tank body is provided with a water injection opening and a water drainage opening; the water injection opening is used for being connected with a water source; the water drainage opening is used for draining water in the tank body; the water injection electromagnetic valve is arranged at the water injection opening and is used for controlling opening and closing of the water injection opening; the water drainage electromagnetic valve is arranged at the water drainage opening and is used for controlling opening and closing of the water drainage opening; and the bracket is movably connected to the tank body and is configured to be capable of lifting a fire source battery to enter or exit the tank body.

9. The fire fighting water tank of claim 8, wherein, The fire-fighting water tank further comprises a tank cover which is detachably connected to the bracket and is configured to completely cover an opening of the tank body after the bracket enters the tank body.

10. The fire fighting water tank of claim 9, wherein, The fire-fighting water tank further comprises a liquid level sensor and a temperature sensor; the liquid level sensor and the temperature sensor are arranged in the tank body; the liquid level sensor is electrically connected with the water injection electromagnetic valve; and the temperature sensor is electrically connected with the water injection electromagnetic valve and the water drainage electromagnetic valve respectively. The fire-fighting water tank further comprises a liquid level observation window which is arranged at the tank body and is configured to enable a user to observe a water level in the tank body.

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