Battery fire suppression system and working machine

Abstract

The application relates to the technical field of engineering machinery, and discloses a battery fire extinguishing system and a working machine, which comprise a battery box, at least two temperature sensors arranged in the battery box and used for detecting the temperature in the battery box, each temperature sensor being arranged at the top of the battery box and being diagonally distributed, and at least two smoke sensors arranged in the battery box and used for detecting the smoke concentration in the battery box, each smoke sensor being arranged at the top of the battery box and being diagonally distributed. By monitoring the temperature and the smoke concentration in the battery box in real time, abnormal conditions of the battery pack can be found in time, so that a rapid response can be made, active intervention can be made in the initial stage of a fire, the spread of thermal runaway can be quickly inhibited, safety hazards can be reduced, and the safety of personnel and the battery pack can be ensured. Moreover, the temperature sensors and the smoke sensors are arranged in a diagonal layout and are arranged at the top of the battery box, so that the space of the battery pack can be fully covered, abnormal conditions in any region can be accurately captured, the protection safety and reliability can be further improved, and fire loss can be reduced.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a battery-powered fire suppression system and its operating machinery. Background Technology

[0002] With energy shortages and increasingly stringent carbon emission controls, the application of new energy construction machinery (such as electric crawler cranes) is becoming more widespread, and customers are paying increasing attention to their safety performance. As a core component of new energy equipment, the safety of battery packs has become a direct focus for customers.

[0003] Battery packs are typically composed of multiple individual batteries connected in series or parallel to meet the power requirements of new energy engineering machinery. However, in actual use, due to factors such as collisions, overcharging, over-discharging, and high-temperature environments, individual batteries may experience thermal runaway, releasing large amounts of high-temperature gases that can ignite adjacent batteries and trigger a chain reaction.

[0004] Currently, the industry primarily uses flame-retardant foam to prevent the spread of battery fires. However, this method is a passive protection measure and cannot fundamentally reduce the risk of battery fires, thus still posing a significant safety hazard. Utility Model Content

[0005] This application provides a battery fire suppression system and operating machinery to solve or improve the problem that new energy engineering machinery in related technologies cannot fundamentally reduce the risk of battery fires, resulting in high safety hazards.

[0006] In a first aspect, this application provides a battery-powered fire suppression system, comprising: Battery compartment, used to store batteries; At least two temperature sensors are installed inside the battery box. The temperature sensors are used to detect the temperature information inside the battery box. Each of the temperature sensors is installed on the top of the battery box and is diagonally distributed. At least two smoke detectors are installed inside the battery box. The smoke detectors are used to detect the smoke concentration information inside the battery box. Each smoke detector is installed on the top of the battery box and is diagonally distributed.

[0007] In one alternative embodiment, the battery box has intersecting first and second diagonals, with each of the temperature detectors disposed on the first diagonal and each of the smoke detectors disposed on the second diagonal.

[0008] In one alternative implementation, it further includes: At least two first plug-in assemblies are provided, each corresponding to and connected to one of the aforementioned temperature detectors, and the first plug-in assemblies are used for connection to external cables; and / or, At least two second plug-in components are provided, each corresponding to and connected to one of the smoke detectors, and the second plug-in components are used to connect to external cables.

[0009] In one alternative implementation, it further includes: At least two fire extinguishing devices are installed inside the battery box. The fire extinguishing devices are used to spray fire extinguishing media. Each fire extinguishing device is arranged circumferentially around the battery box and is located below each of the heat detectors and smoke detectors.

[0010] In one alternative implementation, it further includes: An alarm device is installed outside the battery box and located on the side of the battery box closer to the driver's cab. The alarm device is used to issue warning information.

[0011] In one alternative implementation, it further includes: The first relay is electrically connected to each of the temperature sensors and the alarm device. The first relay is used to control the alarm device to issue a warning message when the temperature information is greater than or equal to a preset temperature. The second relay is electrically connected to each of the smoke detectors and the alarm device. The second relay is used to control the alarm device to issue a warning message when the smoke concentration information is greater than or equal to a preset concentration.

[0012] In one optional embodiment, the first relay and the second relay are connected in series, and one of the first relay and the second relay is electrically connected to each of the fire extinguishing devices. The first relay and the second relay are also used to control each of the fire extinguishing devices to spray fire extinguishing medium when the temperature information is greater than or equal to the preset temperature and the smoke concentration information is greater than or equal to the preset concentration.

[0013] In one alternative embodiment, both the first relay and the second relay are located outside the battery box, and both the first relay and the second relay are located on the side of the battery box closer to the driver's cab.

[0014] In one alternative embodiment, the inner wall of the battery box is covered with a flame-retardant material layer.

[0015] Secondly, this application also provides an operating machine, including a battery-powered fire suppression system as described in any of the preceding claims.

[0016] The battery-powered fire suppression system provided in this application can promptly detect abnormalities in the battery pack by monitoring the temperature and smoke concentration inside the battery compartment in real time. This allows for rapid response and proactive intervention in the initial stages of a fire, quickly suppressing the spread of thermal runaway and effectively avoiding the time lag between fire detection and extinguishing, thus reducing safety hazards and ensuring the safety of personnel and the battery pack. Furthermore, the heat and smoke detectors are installed diagonally on the top of the battery compartment, providing comprehensive coverage of the battery pack space. Abnormalities in any area can be accurately detected, further enhancing safety and reliability and reducing fire losses. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the battery fire suppression system according to an embodiment of this application; Figure 2 This is a second structural schematic diagram of the battery fire suppression system according to an embodiment of this application; Figure 3 This is a partially enlarged schematic diagram of the temperature detector and smoke detector according to an embodiment of this application; Figure 4 This is a partially enlarged schematic diagram of the first and second relays according to an embodiment of this application; Figure 5 This is a schematic diagram of the circuit structure of the first relay and the second relay according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Battery box; 101. First diagonal; 102. Second diagonal; 2. Battery; 3. Temperature detector; 4. Smoke detector; 5. First plug-in assembly; 6. Second plug-in assembly; 7. Fire extinguishing device; 8. Alarm device; 9. First relay; 10. Second relay; 11. Flame retardant material layer; 12. Lifting lug. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following is combined with Figures 1 to 5This application describes a battery-powered fire suppression system and its operating machinery, as embodied in the present application.

[0025] According to embodiments of this application, in one aspect, a battery-powered fire suppression system is provided, applicable to new energy construction machinery such as electric crawler cranes. This battery-powered fire suppression system includes a battery box 1, at least two heat detectors 3, and at least two smoke detectors 4. Specifically, as... Figure 1 As shown, battery box 1 is used to hold batteries 2. Optionally, battery box 1 is a rectangular box divided into multiple storage units along its height, with each storage unit holding at least one single battery. Multiple lifting lugs 12 are provided on the outer top of battery box 1 for easy hoisting. Temperature detectors 3 are installed inside battery box 1 to detect the temperature information inside battery box 1. Optionally, the temperature detectors 3 can be DCD-A3, and are located on the top of battery box 1 in a diagonal arrangement. It should be noted that the number of temperature detectors 3 can be determined according to actual design requirements; for example, two temperature detectors 3 can be installed at opposite corners of the rectangular box. Smoke detectors 4 are installed inside battery box 1 to detect the smoke concentration information inside battery box 1. Optionally, the smoke detectors 4 can be SOC-AS3, and are located on the top of battery box 1 in a diagonal arrangement. It should be noted that the number of smoke detectors 4 can be determined according to actual design requirements. For example, there can be two smoke detectors 4, installed at opposite corners of the rectangular box. Optionally, each heat detector 3 and each smoke detector 4 can be installed at the top of the first storage unit.

[0026] This setup, through real-time monitoring of temperature and smoke concentration within battery compartment 1, allows for timely detection of battery pack anomalies. This enables rapid response and proactive intervention in the initial stages of a fire, quickly suppressing the spread of thermal runaway and effectively avoiding the time lag between fire detection and extinguishing efforts. This reduces safety hazards and ensures the safety of personnel and the battery pack. Furthermore, the heat detector 3 and smoke detector 4 are both installed diagonally on the inner top of battery compartment 1, providing comprehensive coverage of the battery pack space. Anomalies in any area can be accurately detected, further enhancing safety and reliability and reducing fire losses.

[0027] Optionally, in some embodiments of this application, such as Figure 2As shown, the battery box 1 has intersecting first diagonals 101 and second diagonals 102. Each temperature detector 3 is positioned on the first diagonal 101, and each smoke detector 4 is positioned on the second diagonal 102. This arrangement, typically resulting in a rectangular structure, ensures full coverage from one corner of the box to the other by arranging the detectors along the diagonals, avoiding detection blind spots. Furthermore, the intersection of the first diagonal 101 (temperature detector) and the second diagonal 102 (smoke detector) forms a cross-detection network, ensuring that both temperature and smoke signals in the area are effectively captured, thus improving detection reliability.

[0028] Optionally, in some embodiments of this application, such as Figure 1 As shown, the battery-powered fire suppression system also includes at least two first plug-in components 5. Each first plug-in component 5 corresponds to and is connected to each heat detector 3, and the first plug-in component 5 is used to connect to external cables.

[0029] Optionally, such as Figure 1 As shown, the battery-powered fire suppression system also includes at least two second plug-in components 6. Each second plug-in component 6 corresponds to and is connected to each smoke detector 4, and the second plug-in component 6 is used for connection to external cables.

[0030] With this configuration, the detector connects to external cables via a plug-in assembly, forming a standardized interface module. During installation, no on-site wiring or connection is required; simply inserting the external cable into the plug-in assembly completes the electrical connection, significantly reducing construction time and improving the ease of fire protection system installation. After the plug-in assembly and external cables are connected, the wiring harness can be encapsulated inside the enclosure.

[0031] Optionally, in some embodiments of this application, such as Figure 1 and Figure 2 As shown, the battery fire suppression system also includes at least two fire extinguishing devices 7, each housed within the battery compartment 1. The fire extinguishing devices 7 are used to spray extinguishing agents. Optionally, the model of the fire extinguishing device 7 can be JAD300-U01. The fire extinguishing devices 7 are spaced apart around the circumference of the battery compartment 1, and each fire extinguishing device 7 is located below each heat detector 3 and each smoke detector 4. It should be noted that the number of fire extinguishing devices 7 can be determined according to actual design requirements. Optionally, there can be three fire extinguishing devices 7, for example... Figure 1 and Figure 2 As shown, one fire extinguishing device 7 is placed on one side and two fire extinguishing devices 7 are placed on the opposite side, forming a triangular distribution. Each fire extinguishing device 7 can be installed in the second-layer storage unit. In addition, the fire extinguishing devices 7 and their wiring harnesses are encapsulated inside the enclosure to avoid interference with other components and ensure the overall layout is rational.

[0032] It should be noted that the extinguishing medium may include extinguishing agents (such as aerosols) and coolants. The aerosol extinguishing agent in the extinguishing device 7 releases solid particles, adsorbs free radicals in the flame, interrupts the combustion chain reaction, and achieves rapid fire extinguishing. The coolant absorbs a large amount of heat through phase change, directly reducing the battery temperature and preventing thermal runaway. The aerosol extinguishing agent and the coolant work synergistically to precisely suppress thermal runaway and reduce battery pack damage.

[0033] With this configuration, each fire extinguishing device 7 is distributed around the battery box 1 in a circumferential manner, ensuring that the fire extinguishing medium can cover all areas inside the box when sprayed. The fire extinguishing medium is released simultaneously from multiple directions, quickly filling the space inside the box and suppressing the spread of fire. Furthermore, the fire extinguishing devices 7 are located below the detectors to avoid causing detector failure when spraying the fire extinguishing medium, ensuring that the normal operation of the detectors is not interfered with.

[0034] Optionally, in some embodiments of this application, such as Figure 2 As shown, the battery fire suppression system also includes an alarm device 8, which is used to issue warning information. The alarm device 8 is located outside the battery box 1, on the side of the battery box 1 closest to the driver's cab. Optionally, the alarm device 8 can be an audible and visual alarm, for example, a RoLPLX Wall model. The audible and visual alarm is installed on the top outer side of the battery box 1, close to the driver's cab, and can emit a loud siren and a high-intensity red light. This arrangement, placing the alarm device 8 outside the box, avoids damage due to a fire in the battery 2 inside the box, maintaining continuous early warning. Its proximity to the driver's cab also improves the visibility of the alarm device 8, allowing the driver to quickly detect the warning information and alert to the fire.

[0035] Optionally, in some embodiments of this application, such as Figure 2 and Figure 4 As shown, the battery-powered fire suppression system also includes a first relay 9 and a second relay 10. For example, the relay model can be Relayx2. The first relay 9 is electrically connected to each temperature detector 3 and the alarm device 8. The first relay 9 is used to control the alarm device 8 to issue a warning message when the measured temperature is greater than or equal to a preset temperature. The preset temperature can be specifically determined according to actual design requirements; for example, the preset temperature can be set to 60 degrees Celsius. Specifically, in actual use, the contact switch of the first relay 9 is continuously powered, that is, it is continuously energized after the triggering condition is met, and the power supply remains on even if the initial trigger signal disappears. Figure 5 As shown, when any one of the temperature sensors 3 detects that the temperature inside the box is greater than or equal to the preset temperature (i.e., the temperature signal is abnormal), it will send a trigger signal to the first relay 9. At this time, the coil of the first relay 9 is energized, the contact switch is closed, and the alarm device 8 is connected to the power supply, so that it issues a warning signal.

[0036] The second relay 10 is electrically connected to each smoke detector 4 and alarm device 8. The second relay 10 controls the alarm device 8 to issue a warning message when the measured smoke concentration is greater than or equal to a preset concentration. The preset concentration can be specifically determined according to actual design requirements; for example, the preset concentration can be set to 0.2 dB / m³. Specifically, in actual use, the contact switch of the second relay 10 is continuously energized, meaning it remains energized after the trigger condition is met, and the power supply remains on even if the initial trigger signal disappears. Figure 5 As shown, when any smoke detector 4 detects that the smoke concentration in the box is greater than or equal to the preset concentration (i.e., the smoke concentration signal is abnormal), it will send a trigger signal to the second relay 10. At this time, the coil of the second relay 10 is energized, the contact switch is closed, and the alarm device 8 is connected to the power supply, so that it issues a warning signal.

[0037] With this setup, the relay-controlled alarm device 8 can be reliably and effectively switched on and off. When a fire occurs, the fire protection system will activate the fire response based on the detection results of temperature and smoke concentration. If either the temperature or the smoke concentration is abnormal, the alarm device 8 will be triggered immediately to warn staff to carry out maintenance and ensure timely and comprehensive response.

[0038] Optionally, in some embodiments of this application, the first relay 9 and the second relay 10 are connected in series, and one of the first relay 9 and the second relay 10 is electrically connected to each fire extinguishing device 7. The first relay 9 and the second relay 10 are also used to control each fire extinguishing device 7 to spray extinguishing medium when the temperature information is greater than or equal to a preset temperature and the smoke concentration information is greater than or equal to a preset concentration. Optionally, the first relay 9 and the second relay 10 are double-contact switches, and the contacts of each of the two relays are continuously energized. Figure 5 As shown, pin 03 of the first relay 9 is electrically connected to pin 01 of the second relay 10 to achieve series power supply of the two relays, and pin 03 of the second relay 10 is electrically connected to each fire extinguishing device 7.

[0039] Specifically, such as Figure 5As shown, when any one of the temperature detectors 3 detects that the temperature inside the box is greater than or equal to the preset temperature, and any one of the smoke detectors 4 detects that the smoke concentration inside the box is greater than or equal to the preset concentration (i.e., both the temperature signal and the smoke concentration signal are abnormal), all contact switches of the first relay 9 and the second relay 10 are closed. At this time, each fire extinguishing device 7 is connected to the power supply, causing it to spray extinguishing medium into the battery 2 to extinguish the fire. At the same time, the alarm device 8 will also issue a warning signal. If only the temperature signal or the smoke concentration signal is abnormal, the alarm device 8 will issue a warning signal, but the power supply to the fire extinguishing device 7 will be cut off, and the fire extinguishing device 7 will not work.

[0040] This setup employs a dual-signal linkage verification mechanism based on temperature and smoke concentration. Only when both the temperature and smoke concentration signals are detected to be abnormal will each fire extinguishing device 7 be triggered to activate synchronously. This avoids the risk of false triggering by a single signal, fully ensuring the accuracy of fire response, effectively curbing the spread of fire, and reducing the losses caused by fire.

[0041] Optionally, in some embodiments of this application, such as Figure 2 As shown, both the first relay 9 and the second relay 10 are located outside the battery box 1, and both the first relay 9 and the second relay 10 are located on the side of the battery box 1 closest to the driver's cab. Optionally, as... Figure 2 As shown, the first relay 9 and the second relay 10 are installed on the outer side of the middle of the battery box 1, close to the cab. This arrangement, with the relays placed on the outside of the box and adjacent to the cab, solves the problems of limited installation space and inconvenient operation inside the box, providing ample operating space for the driver, facilitating installation and maintenance, and significantly improving work efficiency.

[0042] Optionally, in some embodiments of this application, such as Figure 1 and Figure 2 As shown, the inner wall of the battery box 1 is covered with a flame-retardant material layer 11. Optionally, the flame-retardant material can be flame-retardant foam. With this configuration, the entire battery frame is equipped with flame-retardant material, creating a passive protective barrier. This not only provides physical buffer protection for the battery frame but also blocks heat conduction and inhibits the initial spread of fire through its flame-retardant properties. Simultaneously, combined with a specially designed fire extinguishing device 7, a dual protection system of passive protection and active fire extinguishing is formed. This system can respond quickly in the event of a fire, comprehensively blocking the path of fire spread and providing reliable protection for battery safety.

[0043] According to an embodiment of this application, another aspect provides a working machine, including the battery-powered fire suppression system as described in the various embodiments above. Optionally, the working machine can be a new energy construction machine such as an electric crawler crane. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the battery-powered fire suppression system described above, and therefore will not be repeated here.

[0044] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery-powered fire suppression system, characterized in that, include: Battery box (1), used to hold batteries (2); At least two temperature sensors (3) are installed inside the battery box (1). The temperature sensors (3) are used to detect the temperature information inside the battery box (1). Each of the temperature sensors (3) is installed on the top of the battery box (1) and is diagonally distributed. At least two smoke detectors (4) are installed inside the battery box (1). The smoke detectors (4) are used to detect the smoke concentration information inside the battery box (1). Each smoke detector (4) is installed on the top of the battery box (1) and is diagonally distributed.

2. The battery-powered fire suppression system according to claim 1, characterized in that, The battery box (1) has intersecting first diagonal (101) and second diagonal (102), each of the temperature detectors (3) is disposed on the first diagonal (101), and each of the smoke detectors (4) is disposed on the second diagonal (102).

3. The battery-powered fire suppression system according to claim 1, characterized in that, Also includes: At least two first plug-in components (5) correspond one-to-one with and are connected to each of the said temperature sensors (3), and the first plug-in components (5) are used to connect to external cables; and / or, At least two second plug-in components (6) are connected to each of the smoke detectors (4) and are used to connect to external cables.

4. The battery-powered fire suppression system according to any one of claims 1 to 3, characterized in that, Also includes: At least two fire extinguishing devices (7) are installed inside the battery box (1). The fire extinguishing devices (7) are used to spray fire extinguishing media. Each fire extinguishing device (7) is arranged circumferentially around the battery box (1) and each fire extinguishing device (7) is located below each of the heat detectors (3) and each of the smoke detectors (4).

5. The battery-powered fire suppression system according to claim 4, characterized in that, Also includes: An alarm device (8) is installed outside the battery box (1) and located on the side of the battery box (1) closer to the driver's cab. The alarm device (8) is used to issue warning information.

6. The battery-powered fire suppression system according to claim 5, characterized in that, Also includes: The first relay (9) is electrically connected to each of the temperature sensors (3) and the alarm device (8). The first relay (9) is used to control the alarm device (8) to issue a warning message when the temperature information is greater than or equal to a preset temperature. The second relay (10) is electrically connected to each of the smoke detectors (4) and the alarm device (8). The second relay (10) is used to control the alarm device (8) to issue a warning message when the smoke concentration information is greater than or equal to a preset concentration.

7. The battery-powered fire suppression system according to claim 6, characterized in that, The first relay (9) and the second relay (10) are connected in series, and one of the first relay (9) and the second relay (10) is electrically connected to each of the fire extinguishing devices (7). The first relay (9) and the second relay (10) are also used to control each of the fire extinguishing devices (7) to spray fire extinguishing medium when the temperature information is greater than or equal to the preset temperature and the smoke concentration information is greater than or equal to the preset concentration.

8. The battery-powered fire suppression system according to claim 6, characterized in that, The first relay (9) and the second relay (10) are both located outside the battery box (1), and the first relay (9) and the second relay (10) are both located on the side of the battery box (1) closer to the cab.

9. The battery-powered fire suppression system according to any one of claims 1 to 3, characterized in that, The inner wall of the battery box (1) is covered with a flame-retardant material layer (11).

10. A type of operating machinery, characterized in that, Includes the battery-powered fire suppression system as described in any one of claims 1 to 9.

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