Combustible gas detection device for battery case

Abstract

The application discloses a combustible gas detection device for a battery box, which comprises a vertical cabinet type battery box body, combustible gas detection assemblies are installed at corner positions inside the vertical cabinet type battery box body, the combustible gas detection assembly comprises an upper collecting pipe, a lower collecting pipe, an intermediate collecting pipe, a microcontroller and a micro alarm, the upper collecting pipe and the lower collecting pipe are communicated through the intermediate collecting pipe, a first air inlet is arranged at the upper portion of the upper collecting pipe, a second air inlet is arranged at the lower portion of the lower collecting pipe, a third air inlet is arranged at the middle portion of the intermediate collecting pipe, the upper collecting pipe is connected with a first micro combustible gas sensor, the intermediate collecting pipe is connected with a second micro combustible gas sensor, and the lower collecting pipe is connected with a third micro combustible gas sensor, the micro combustible gas sensors are respectively connected with the microcontroller in signal connection, and the microcontroller is connected with the micro alarm in signal connection. The device can realize rapid collection and all-around detection of the combustible gas leaked in the vertical cabinet type battery box body.

Description

Technical Field

[0001] This invention relates to the technical field of detection devices, and in particular to a combustible gas detection device for a battery box. Background Technology

[0002] With continuous social progress and the booming development of the new energy industry, the battery industry has ushered in unprecedented technological innovation and large-scale application. Especially in the fields of electric vehicles, energy storage power stations, and portable electronic devices, the battery box, as a core component of energy storage, directly relates to the safety of users' lives and property and the sustainable development of the industry. However, the current battery box safety monitoring system still has significant technical gaps, especially in the dynamic monitoring of combustible gas leaks, which has become a potential risk point restricting the high-quality development of the industry.

[0003] During operation, battery systems may continuously release various flammable gases due to abnormal electrochemical reactions, mechanical damage, or material aging. Taking lithium batteries as an example, the gaseous composition generated during thermal runaway is complex, containing mixtures of gases of different densities, including hydrogen (0.089 g / L), methane (0.717 g / L), carbon monoxide (1.25 g / L), ethane (1.356 g / L), and propylene (1.914 g / L). Low-density flammable gases (such as hydrogen, methane, and carbon monoxide) will quickly rise and accumulate in the top space of the equipment, medium-density gases (such as ethane) tend to form an aerosol layer in the middle layer of the equipment, and high-density gases (such as propylene) will sink to the bottom of the enclosure. This stratification characteristic results in a high monitoring blind zone for traditional single-point sensors (usually installed in the upper part of the equipment). More seriously, the lower explosive limit of some flammable gases is as low as 4% by volume, which may trigger a chain reaction of safety accidents. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a combustible gas detection device for battery boxes, which can quickly collect and detect combustible gases leaking inside cabinet-type battery boxes in a comprehensive manner, with accurate and real-time detection.

[0005] The technical solution adopted by this invention to solve its technical problem is: a combustible gas detection device for a battery box, comprising a cabinet-type battery box body, wherein combustible gas detection components are installed at the corner positions inside the cabinet-type battery box body, the combustible gas detection components comprising an upper collection pipe, a lower collection pipe, a middle collection pipe, a first miniature combustible gas sensor, a second miniature combustible gas sensor, a third miniature combustible gas sensor, a microcontroller, and a micro alarm, one end of the middle collection pipe being connected to the upper collection pipe, and the other end of the middle collection pipe being connected to the lower collection pipe, the upper collection pipe and the lower collection pipe being connected by the... The middle collection pipe is connected, the upper collection pipe has a first air inlet at its upper part, the lower collection pipe has a second air inlet at its lower part, and the middle collection pipe has a third air inlet in its middle part. One side of the upper collection pipe is connected to the first miniature combustible gas sensor, one side of the middle collection pipe is connected to the second miniature combustible gas sensor, and one side of the lower collection pipe is connected to the third miniature combustible gas sensor. The first, second, and third miniature combustible gas sensors are respectively connected to the micro controller, and the micro controller is connected to the micro alarm.

[0006] To be further specific, in the above technical solution, the upper end of the upper collection pipe is provided with a first long pipe and a first short pipe. The first long pipe is arranged along the length direction of the cabinet-type battery box body, and the first short pipe is arranged along the width direction of the cabinet-type battery box body. Both the first long pipe and the first short pipe are connected to the upper collection pipe.

[0007] To be further specific, in the above technical solution, both the lower end face of the first long pipe and the lower end face of the first short pipe are provided with a first air inlet.

[0008] To be further specific, in the above technical solution, the lower end of the lower collection pipe is provided with a second long pipe and a second short pipe. The second long pipe is arranged along the length direction of the cabinet-type battery box, and the second short pipe is arranged along the width direction of the cabinet-type battery box. Both the second long pipe and the second short pipe are connected to the lower collection pipe.

[0009] To be further specific, in the above technical solution, the upper end face of the second long tube and the upper end face of the second short tube are both provided with a second air inlet.

[0010] To be further specific, in the above technical solution, an upper sealing plate is provided on the upper part of the upper collection pipe, and the miniature alarm is installed and fixed on the upper sealing plate. This design can effectively fix and support the overall structure through the upper sealing plate.

[0011] To be further specific, in the above technical solution, the lower end of the lower collection pipe is provided with a lower sealing plate, and the lower sealing plate contacts the lower end of the cabinet-type battery box body. This design can effectively fix and support the overall structure through the lower sealing plate.

[0012] To be further specific, in the above technical solution, protective nets are installed at the corners inside the cabinet-type battery box. The protective nets are located on the outside of the combustible gas detection component. This design can effectively protect the combustible gas detection component.

[0013] To be further specific, in the above technical solution, the protective net is an inwardly concave arc-shaped structure.

[0014] The beneficial effects of this invention are as follows: The combustible gas detection device for battery boxes has a simple structural design, effectively reducing installation complexity; it adopts a rapid gas collection mechanism, which can promptly detect combustible gas leaks inside cabinet-type battery boxes; it achieves all-round three-dimensional detection, eliminating monitoring blind spots; it has high-precision sensors and a real-time feedback system, ensuring accurate and reliable detection data; it significantly improves the operational stability and safety of the battery system, effectively preventing the risk of combustible gas accumulation caused by battery thermal runaway or leakage, and reducing potential safety hazards through an active prevention mechanism; through its innovative detection architecture design, this device provides a dynamic and multi-dimensional gas monitoring solution for the safe operation of battery boxes while ensuring system reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the combustible gas detection device for battery boxes according to the present invention;

[0017] Figure 2 This is a schematic diagram of the combustible gas detection component in this invention;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the first long tube, the first short tube, and the upper collecting tube in this invention;

[0019] Figure 4 This is a schematic diagram of the assembly structure of the second long tube, the second short tube, and the lower collecting tube in this invention;

[0020] Figure 5This is a schematic diagram of the assembly structure of the upright cabinet-type battery box and the protective net in this invention.

[0021] The labels in the diagram are as follows: 1. Vertical battery box body; 2. Upper collection pipe; 3. Lower collection pipe; 4. Middle collection pipe; 5. First miniature combustible gas sensor; 6. Second miniature combustible gas sensor; 7. Third miniature combustible gas sensor; 8. Microcontroller; 9. Miniature alarm; 10. First air inlet; 11. Second air inlet; 12. Third air inlet; 13. First long pipe; 14. First short pipe; 15. Second long pipe; 16. Second short pipe; 17. Upper sealing plate; 18. Lower sealing plate; 19. Protective net; 20. Combustible gas detection component. Detailed Implementation

[0022] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention discloses a combustible gas detection device for a battery box, comprising a cabinet-type battery box body 1. Combustible gas detection components 20 are installed at the corner positions inside the cabinet-type battery box body 1. Each combustible gas detection component 20 includes an upper collection pipe 2, a lower collection pipe 3, a middle collection pipe 4, a first miniature combustible gas sensor 5, a second miniature combustible gas sensor 6, a third miniature combustible gas sensor 7, a microcontroller 8, and a miniature alarm 9. One end of the middle collection pipe 4 is connected to the upper collection pipe 2, and the other end of the middle collection pipe 4 is connected to the lower collection pipe 3. The upper collection pipe 2 and the lower collection pipe 3 are connected by the middle collection pipe 4. The manifold 4 is connected, the upper part of the upper collection pipe 2 is provided with a first air inlet 10, the lower part of the lower collection pipe 3 is provided with a second air inlet 11, the middle part of the middle collection pipe 4 is provided with a third air inlet 12, one side of the upper collection pipe 2 is connected to a first miniature combustible gas sensor 5, one side of the middle collection pipe 4 is connected to a second miniature combustible gas sensor 6, and one side of the lower collection pipe 3 is connected to a third miniature combustible gas sensor 7. The first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6, and the third miniature combustible gas sensor 7 are respectively connected to the microcontroller 8, and the microcontroller 8 is connected to the micro alarm 9.

[0024] The upper end of the upper collection pipe 2 is provided with a first long pipe 13 and a first short pipe 14. The first long pipe 13 is arranged along the length direction of the cabinet-type battery box 1, and the first short pipe 14 is arranged along the width direction of the cabinet-type battery box 1. Both the first long pipe 13 and the first short pipe 14 are connected to the upper collection pipe 2. The lower end face of the first long pipe 13 and the lower end face of the first short pipe 14 are provided with a first air inlet 10.

[0025] The lower end of the lower collection pipe 3 is provided with a second long pipe 15 and a second short pipe 16. The second long pipe 15 is arranged along the length direction of the cabinet-type battery box 1, and the second short pipe 16 is arranged along the width direction of the cabinet-type battery box 1. Both the second long pipe 15 and the second short pipe 16 are connected to the lower collection pipe 3. The upper end face of the second long pipe 15 and the upper end face of the second short pipe 16 are provided with a second air inlet 11.

[0026] The upper collection pipe 2, lower collection pipe 3, middle collection pipe 4, first long pipe 13, first short pipe 14, second long pipe 15 and second short pipe 16 are all made of stainless steel and are suitable for collecting combustible gases of full density. They are pressure resistant, corrosion resistant and have low permeability.

[0027] The upper part of the upper collection pipe 2 is provided with an upper sealing plate 17, and the miniature alarm 9 is installed and fixed on the upper sealing plate 17. This design can effectively fix and support the overall structure through the upper sealing plate 17.

[0028] The lower end of the lower collection pipe 3 is provided with a lower sealing plate 18, which contacts the lower end of the cabinet-type battery box body 1. This design can effectively fix and support the overall structure through the lower sealing plate 18.

[0029] Protective nets 19 are installed at the corners inside the cabinet-type battery box 1. The protective nets 19 are located on the outside of the combustible gas detection component 20. This design can effectively protect the combustible gas detection component 20. The protective nets 19 have an inwardly concave arc-shaped structure.

[0030] The first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6, and the third miniature combustible gas sensor 7 are purchased directly from the market. Selecting suitable miniature combustible gas sensors requires comprehensive consideration of detection needs, environmental conditions, and cost, and regular maintenance is necessary to ensure reliability. The first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6, and the third miniature combustible gas sensor 7 can be either infrared sensors or laser spectral sensors. Infrared sensors detect different gases through multiple filters or tunable light sources, offering advantages such as strong anti-interference capabilities, long lifespan, and suitability for complex environments. Laser spectral sensors can simultaneously detect multiple gases by adjusting the laser wavelength, offering advantages such as high precision and accurate identification of multiple gases. Furthermore, to improve safety, both infrared and laser spectral sensors must be explosion-proof. Additionally, the first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6, and the third miniature combustible gas sensor 7 must support analog or digital signals. The layout of the first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6, and the third miniature combustible gas sensor 7 can be optimized through CFD simulation or smoke testing. At the same time, it is necessary to ensure that the cabinet-type battery box body 1, the first miniature combustible gas sensor 5, the second miniature combustible gas sensor 6 and the third miniature combustible gas sensor 7 are properly grounded to prevent electrostatic interference.

[0031] The microcontroller 8 can be purchased directly from the market. Choosing a suitable microcontroller 8 requires balancing performance, power consumption, cost, and development resources. For safety-critical applications such as combustible gas sensors, priority should be given to those with functional safety certification, and redundancy design and real-time response capabilities should be emphasized. Additionally, the microcontroller 8 must support analog or digital signals.

[0032] Miniature alarm devices 9 can be purchased directly from the market. When choosing a suitable miniature alarm device 9, it's necessary to comprehensively consider the application scenario, performance parameters, compatibility, and maintenance costs. The priority is: security factors are greater than scenario matching factors, scenario matching factors are greater than scalability factors, and scalability factors are greater than cost factors. Audible and visual alarm devices 9 are preferred.

[0033] The combustible gas detection component 20 must prioritize safety, while also considering environmental resistance, low power consumption, and ease of maintenance. It should prioritize automotive-grade or industrial-grade certified components, verify thermal management and shock resistance performance through simulation, and reserve redundant structures to accommodate future upgrades, such as adding communication modules.

[0034] In addition, to further improve the safety performance of the device, other linkage control systems can be added, which can trigger exhaust fans, power cut-offs, or fire suppression systems (such as heptafluoropropane fire extinguishing systems) via relays. Alternatively, signals can be connected to a cloud monitoring platform for remote early warning. Alternatively, an integrated data storage module can be added to record changes in gas concentration, facilitating accident tracing.

[0035] The working principle of the combustible gas detection device for the battery box is as follows:

[0036] This application installs combustible gas detection components 20 at the corner positions inside the cabinet-type battery box 1. These components quickly collect combustible gases accumulated in the upper, middle, and lower parts of the cabinet-type battery box 1. Specifically, this involves the following three scenarios:

[0037] 1. When the density of combustible gas is less than that of air, combustible gas will accumulate on the top of the cabinet-type battery box 1. It will enter through the first air inlet 10 on the upper collection pipe 2, the first air inlet 10 on the lower end face of the first long pipe 13, and the first air inlet 10 on the lower end face of the first short pipe 14. Finally, it will be sensed by the first miniature combustible gas sensor 5 and the specific data will be transmitted to the micro controller 6. The micro controller 6 will analyze and process the data. When the data exceeds the set data index, it will control the miniature alarm 9 to sound an alarm, so as to remind the staff to take timely countermeasures.

[0038] 2. When the density of combustible gas is greater than that of air, the combustible gas will accumulate at the bottom of the cabinet-type battery box 1 and enter through the second air inlet 11 on the lower collection pipe 3, the second air inlet 11 on the upper end face of the second long pipe 15, and the second air inlet 11 on the lower end face of the second short pipe 16. Finally, it will be sensed by the third miniature combustible gas sensor 7 and the specific data will be transmitted to the micro controller 6. The micro controller 6 will analyze and process the data. When the set data index is exceeded, it will control the micro alarm 9 to sound an alarm, so as to remind the staff to take timely countermeasures.

[0039] Third, when the density of combustible gas is close to that of air, the combustible gas will accumulate in the middle of the cabinet-type battery box 1, enter through the third air inlet 12 on the middle collection pipe 4, and finally be sensed by the second miniature combustible gas sensor 6, and the specific data will be transmitted to the micro controller 6. The micro controller 6 analyzes and processes the data, and when the set data index is exceeded, it will control the miniature alarm 9 to sound an alarm, so as to remind the staff to take timely countermeasures.

[0040] This invention relates to a combustible gas detection device for battery boxes. Its simple structural design effectively reduces installation complexity. Employing a rapid gas collection mechanism, it can promptly detect combustible gas leaks within upright battery boxes. It achieves comprehensive, three-dimensional detection, eliminating blind spots. Equipped with high-precision sensors and a real-time feedback system, it ensures accurate and reliable detection data. It significantly improves the operational stability and safety of the battery system, effectively preventing the risk of combustible gas accumulation due to battery thermal runaway or leakage, and reducing potential safety hazards through proactive prevention mechanisms. Through its innovative detection architecture design, this device provides a dynamic, multi-dimensional gas monitoring solution for the safe operation of battery boxes while ensuring system reliability.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combustible gas detection device for a battery box, characterized in that: The battery box includes a cabinet-type housing (1). Combustible gas detection components (20) are installed at the corners inside the cabinet-type housing (1). Each combustible gas detection component (20) includes an upper collection pipe (2), a lower collection pipe (3), a middle collection pipe (4), a first miniature combustible gas sensor (5), a second miniature combustible gas sensor (6), a third miniature combustible gas sensor (7), a microcontroller (8), and a micro alarm (9). One end of the middle collection pipe (4) is connected to the upper collection pipe (2), and the other end is connected to the lower collection pipe (3). The upper collection pipe (2) and the lower collection pipe (3) are connected through the middle collection pipe (4). The upper part of the upper collection pipe (2) is provided with a first air inlet (10), the lower part of the lower collection pipe (3) is provided with a second air inlet (11), the middle part of the middle collection pipe (4) is provided with a third air inlet (12), one side of the upper collection pipe (2) is connected to the first miniature combustible gas sensor (5), one side of the middle collection pipe (4) is connected to the second miniature combustible gas sensor (6), one side of the lower collection pipe (3) is connected to the third miniature combustible gas sensor (7), the first miniature combustible gas sensor (5), the second miniature combustible gas sensor (6), and the third miniature combustible gas sensor (7) are respectively connected to the micro controller (8), and the micro controller (8) is connected to the micro alarm (9). The upper end of the upper collection pipe (2) is provided with a first long pipe (13) and a first short pipe (14). The first long pipe (13) is arranged along the length direction of the cabinet-type battery box (1), and the first short pipe (14) is arranged along the width direction of the cabinet-type battery box (1). The first long pipe (13) and the first short pipe (14) are both connected to the upper collection pipe (2). The lower end face of the first long tube (13) and the lower end face of the first short tube (14) are both provided with a first air inlet (10). The lower end of the lower collection pipe (3) is provided with a second long pipe (15) and a second short pipe (16). The second long pipe (15) is arranged along the length direction of the cabinet-type battery box (1), and the second short pipe (16) is arranged along the width direction of the cabinet-type battery box (1). The second long pipe (15) and the second short pipe (16) are both connected to the lower collection pipe (3). The upper end face of the second long tube (15) and the upper end face of the second short tube (16) are both provided with a second air inlet (11).

2. The combustible gas detection device for a battery box according to claim 1, characterized in that: The upper part of the upper collection pipe (2) is provided with an upper sealing plate (17), and the miniature alarm (9) is installed and fixed on the upper sealing plate (17).

3. The combustible gas detection device for a battery box according to claim 1, characterized in that: The lower end of the lower collection pipe (3) is provided with a lower sealing plate (18), which is in contact with the lower end of the cabinet-type battery box body (1).

4. The combustible gas detection device for a battery box according to claim 1, characterized in that: Protective nets (19) are installed at the corners inside the cabinet-type battery box (1), and the protective nets (19) are located on the outside of the combustible gas detection component (20).

5. A combustible gas detection device for a battery box according to claim 4, characterized in that: The protective net (19) is an inwardly concave arc-shaped structure.

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