Combustible gas detection device for battery box

Abstract

The invention discloses a combustible gas detection device for a battery box, the combustible gas detection device comprises a vertical cabinet type battery box body, combustible gas detection assemblies are installed at corners in the vertical cabinet type battery box body, and each combustible gas detection assembly comprises an upper collection pipe, a lower collection pipe, a middle collection pipe, a microcontroller and a miniature alarm; the upper collecting pipe is communicated with the lower collecting pipe through the middle collecting pipe, a first air inlet is formed in the upper portion of the upper collecting pipe, a second air inlet is formed in the lower portion of the lower collecting pipe, a third air inlet is formed in the middle of the middle collecting pipe, the upper collecting pipe is communicated with a first miniature combustible gas sensor, and the middle collecting pipe is communicated with a second miniature combustible gas sensor. The lower collecting pipe is communicated with a third micro combustible gas sensor, the micro combustible gas sensors are respectively in signal connection with a micro controller, and the micro controller is in signal connection with a micro alarm. According to the device, the combustible gas leaked in the vertical cabinet type battery box body can be rapidly collected and comprehensively detected.

Description

Technical Field

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

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

[0003] During the operation of the battery system, due to problems such as abnormal electrochemical reactions, mechanical damage, or material aging, various combustible gases may be continuously released. Taking lithium batteries as an example, the gas components generated during their thermal runaway are complex, including a mixture of gases with different densities such as 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). Among them, low-density combustible gases (such as hydrogen, methane, and carbon monoxide) will quickly float up and accumulate in the top space of the equipment, medium-density gases (such as ethane) are likely 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 box. This layering characteristic results in a relatively high monitoring blind area for traditional single-point sensors (usually installed in the upper-middle part of the equipment). More seriously, the lower explosion limit of some combustible gases is as low as 4% by volume concentration, which may trigger a chain 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 a battery box to solve the problems in the above background art, which can quickly collect and comprehensively detect the combustible gas leaked inside the cabinet-type battery box, with accurate and real-time detection.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A combustible gas detection device for a battery box, including a vertical cabinet-type battery box body, combustible gas detection components are installed at the corner positions inside the vertical cabinet-type battery box body. The combustible gas detection component includes an upper collection pipe, a lower collection pipe, an intermediate collection pipe, a first micro combustible gas sensor, a second micro combustible gas sensor, a third micro combustible gas sensor, a micro controller, and a micro alarm. One end of the intermediate collection pipe is connected to the upper collection pipe, and the other end of the intermediate collection pipe is connected to the lower collection pipe. The upper collection pipe and the lower collection pipe are communicated through the intermediate collection pipe. A first air inlet hole is provided in the upper part of the upper collection pipe, a second air inlet hole is provided in the lower part of the lower collection pipe, and a third air inlet hole is provided in the middle of the intermediate collection pipe. One side of the upper collection pipe is communicated with the first micro combustible gas sensor, one side of the intermediate collection pipe is communicated with the second micro combustible gas sensor, and one side of the lower collection pipe is communicated with the third micro combustible gas sensor. The first micro combustible gas sensor, the second micro combustible gas sensor, and the third micro combustible gas sensor are respectively signal-connected to the micro controller, and the micro controller is signal-connected to the micro alarm.

[0006] Further specifically defined, in the above technical solution, a first long pipe and a first short pipe are provided at the upper end of the upper collection pipe. The first long pipe is arranged along the length direction of the vertical cabinet-type battery box body, and the first short pipe is arranged along the width direction of the vertical cabinet-type battery box body. Both the first long pipe and the first short pipe are communicated with the upper collection pipe.

[0007] Further specifically defined, in the above technical solution, first air inlet holes are provided on the lower end surfaces of both the first long pipe and the first short pipe.

[0008] Further specifically defined, in the above technical solution, a second long pipe and a second short pipe are provided at the lower end of the lower collection pipe. The second long pipe is arranged along the length direction of the vertical cabinet-type battery box body, and the second short pipe is arranged along the width direction of the vertical cabinet-type battery box body. Both the second long pipe and the second short pipe are communicated with the lower collection pipe.

[0009] Further specifically defined, in the above technical solution, second air inlet holes are provided on the upper end surfaces of both the second long pipe and the second short pipe.

[0010] Further specifically defined, in the above technical solution, an upper sealing plate is provided in the upper part of the upper collection pipe, and the micro alarm is installed and fixed on the upper sealing plate. Such a design can effectively fix and support the overall structure through the upper sealing plate.

[0011] Further specifically defined, in the above technical solution, a lower sealing plate is provided at the lower end of the lower collection pipe, and the lower sealing plate is in contact with the lower end of the cabinet-type battery box body. Such a design can effectively fix and support the overall structure through the lower sealing plate.

[0012] Further specifically defined, in the above technical solution, protective nets are installed at the corner positions inside the cabinet-type battery box body, and the protective nets are located outside the combustible gas detection assembly. Such a design can effectively protect the combustible gas detection assembly.

[0013] Further specifically defined, in the above technical solution, the protective net is an arc-shaped structure that is recessed inward.

[0014] The beneficial effects of the present invention are as follows: The combustible gas detection device for the battery box of the present invention has a simple structural design, effectively reducing the installation complexity; adopting a fast gas collection mechanism, it can timely capture the leakage of combustible gas in the cabinet-type battery box; achieving all-round three-dimensional detection, eliminating monitoring blind spots; equipped with high-precision sensors and a real-time feedback system to ensure the accuracy and reliability of detection data; significantly improving the operation 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 the innovative detection architecture design, while ensuring the reliability of the system, it provides a dynamic and multi-dimensional gas monitoring solution for the safe operation of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the combustible gas detection device for the battery box of the present invention; Figure 2 It is a schematic structural diagram of the combustible gas detection assembly in the present invention; Figure 3 It is an assembly structural diagram of the first long pipe, the first short pipe and the upper collection pipe in the present invention; Figure 4 It is an assembly structural diagram of the second long pipe, the second short pipe and the lower collection pipe in the present invention; Figure 5 It is an assembly structural diagram of the cabinet-type battery box body and the protective net in the present invention.

[0017] The reference numerals in the figure are: 1. Floor-standing battery box body; 2. Upper collection pipe; 3. Lower collection pipe; 4. Intermediate collection pipe; 5. First micro combustible gas sensor; 6. Second micro combustible gas sensor; 7. Third micro combustible gas sensor; 8. Micro controller; 9. Micro 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. Protection net; 20. Combustible gas detection assembly. Detailed implementation mode

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0019] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a combustible gas detection device for a battery box according to the present invention includes a floor-standing battery box body 1, and combustible gas detection assemblies 20 are installed at the corner positions inside the floor-standing battery box body 1. The combustible gas detection assembly 20 includes an upper collection pipe 2, a lower collection pipe 3, an intermediate collection pipe 4, a first micro combustible gas sensor 5, a second micro combustible gas sensor 6, a third micro combustible gas sensor 7, a micro controller 8 and a micro alarm 9. One end of the intermediate collection pipe 4 is connected to the upper collection pipe 2, and the other end of the intermediate collection pipe 4 is connected to the lower collection pipe 3. The upper collection pipe 2 and the lower collection pipe 3 are communicated through the intermediate collection pipe 4. A first air inlet 10 is provided at the upper part of the upper collection pipe 2, a second air inlet 11 is provided at the lower part of the lower collection pipe 3, and a third air inlet 12 is provided in the middle of the intermediate collection pipe 4. One side of the upper collection pipe 2 is communicated with the first micro combustible gas sensor 5, one side of the intermediate collection pipe 4 is communicated with the second micro combustible gas sensor 6, and one side of the lower collection pipe 3 is communicated with the third micro combustible gas sensor 7. The first micro combustible gas sensor 5, the second micro combustible gas sensor 6 and the third micro combustible gas sensor 7 are respectively connected to the micro controller 8 in a signal manner, and the micro controller 8 is connected to the micro alarm 9 in a signal manner.

[0020] Wherein, a first long pipe 13 and a first short pipe 14 are provided at the upper end of the upper collection pipe 2. The first long pipe 13 is arranged along the length direction of the floor-standing battery box body 1, and the first short pipe 14 is arranged along the width direction of the floor-standing battery box body 1. Both the first long pipe 13 and the first short pipe 14 are communicated with the upper collection pipe 2. First air inlets 10 are provided on the lower end surfaces of both the first long pipe 13 and the first short pipe 14.

[0021] At the lower end of the lower collection pipe 3, a second long pipe 15 and a second short pipe 16 are provided. The second long pipe 15 is arranged along the length direction of the cabinet - type battery box body 1, and the second short pipe 16 is arranged along the width direction of the cabinet - type battery box body 1. Both the second long pipe 15 and the second short pipe 16 are communicated with the lower collection pipe 3. Second air inlets 11 are provided on the upper end surfaces of both the second long pipe 15 and the second short pipe 16.

[0022] The upper collection pipe 2, the lower collection pipe 3, the middle collection pipe 4, the first long pipe 13, the first short pipe 14, the second long pipe 15 and the second short pipe 16 are all made of stainless - steel material, suitable for collecting full - density combustible gas, with pressure resistance, corrosion resistance and low permeability.

[0023] An upper sealing plate 17 is provided at the upper part of the upper collection pipe 2, and the micro - alarm 9 is installed and fixed on the upper sealing plate 17. Such a design can effectively fix and support the overall structure through the upper sealing plate 17.

[0024] A lower sealing plate 18 is provided at the lower end of the lower collection pipe 3, and the lower sealing plate 18 is in contact with the lower end of the cabinet - type battery box body 1. Such a design can effectively fix and support the overall structure through the lower sealing plate 18.

[0025] Protection nets 19 are installed at the corner positions inside the cabinet - type battery box body 1. The protection nets 19 are located outside the combustible gas detection assembly 20. Such a design can effectively protect the combustible gas detection assembly 20. The protection nets 19 are arc - shaped structures that are recessed inward.

[0026] Among them, the first micro combustible gas sensor 5, the second micro combustible gas sensor 6, and the third micro combustible gas sensor 7 are directly purchased from the market. When selecting a suitable micro combustible gas sensor, it is necessary to comprehensively consider detection requirements, environmental conditions, and costs, and perform regular maintenance to ensure reliability. The first micro combustible gas sensor 5, the second micro combustible gas sensor 6, and the third micro combustible gas sensor 7 can be infrared sensors or laser spectroscopy sensors. Infrared sensors detect different gases through multiple filters or tunable light sources. Infrared sensors have the advantages of strong anti-interference ability, long lifespan, and suitability for complex environments. Laser spectroscopy sensors can detect multiple gases simultaneously by adjusting the laser wavelength. Laser spectroscopy sensors have the advantages of high precision and accurate identification of multiple gases. Further, to improve safety, whether it is an infrared sensor or a laser spectroscopy sensor, an explosion-proof sensor must be selected. In addition, the first micro combustible gas sensor 5, the second micro combustible gas sensor 6, and the third micro combustible gas sensor 7 need to support analog or digital signals. The layout of the first micro combustible gas sensor 5, the second micro combustible gas sensor 6, and the third micro combustible gas sensor 7 can be optimized through CFD simulation or smoke testing. At the same time, it is necessary to ensure that the vertical cabinet battery box housing 1, the first micro combustible gas sensor 5, the second micro combustible gas sensor 6, and the third micro combustible gas sensor 7 are well grounded to prevent electrostatic interference.

[0027] The microcontroller 8 is directly purchased from the market. When selecting a suitable microcontroller 8, it is necessary to balance performance, power consumption, cost, and development resources. For safety-critical applications such as combustible gas sensors, it is preferred to select those that have passed functional safety certification, and pay attention to redundant design and real-time response capabilities. In addition, the microcontroller 8 needs to support analog or digital signals.

[0028] The micro alarm 9 is directly purchased from the market. When selecting a suitable micro alarm 9, it is necessary to comprehensively consider the application scenario, performance parameters, compatibility, and maintenance cost. The selection priority is that the safety factor is greater than the scenario matching factor, the scenario matching factor is greater than the scalability factor, and the scalability factor is greater than the cost factor. The micro alarm 9 is preferably an audible and visual alarm.

[0029] The combustible gas detection component 20 needs to take safety as the core, and also consider environmental resistance, low power consumption, and easy maintainability. It is preferred to select components certified at the automotive or industrial level, verify the thermal management and seismic performance through simulation, and reserve a redundant structure to adapt to future upgrades, such as adding a communication module, etc.

[0030] In addition, to further improve the safety performance of the device, other interlocking control systems can be added to trigger the exhaust fan, power cut-off, or fire protection system (such as a heptafluoropropane fire extinguishing device) through a relay. Or, the signal can be connected to a cloud monitoring platform to achieve remote warning. Or, by adding an integrated data storage module, the change in gas concentration can be recorded for easy tracing of accidents.

[0031] The working principle of the combustible gas detection device for the battery box is as follows: In this application, combustible gas detection components 20 are arranged at the corner positions inside the cabinet-type battery box body 1. The combustible gas detection components 20 quickly collect the combustible gas accumulated in the upper, middle, and lower parts of the cabinet-type battery box body 1, which is specifically divided into the following three situations: 1. When the density of the combustible gas is less than the density of air, the combustible gas accumulates at the top of the cabinet-type battery box body 1 and enters through the first air inlet holes 10 on the upper collection pipe 2, the first air inlet holes 10 on the lower end face of the first long pipe 13, and the first air inlet holes 10 on the lower end face of the first short pipe 14. Finally, it is sensed by the first micro combustible gas sensor 5, and the specific data is transmitted to the microcontroller 6. The microcontroller 6 analyzes and processes the data. When the set data index is exceeded, it will control the micro alarm 9 to alarm, so as to remind the staff to take corresponding measures in time; 2. When the density of the combustible gas is greater than the density of air, the combustible gas accumulates at the bottom of the cabinet-type battery box body 1 and enters through the second air inlet holes 11 on the lower collection pipe 3, the second air inlet holes 11 on the upper end face of the second long pipe 15, and the second air inlet holes 11 on the lower end face of the second short pipe 16. Finally, it is sensed by the third micro combustible gas sensor 7, and the specific data is transmitted to the microcontroller 6. The microcontroller 6 analyzes and processes the data. When the set data index is exceeded, it will control the micro alarm 9 to alarm, so as to remind the staff to take corresponding measures in time; 3. When the density of the combustible gas is close to the density of air, the combustible gas accumulates in the middle of the cabinet-type battery box body 1 and enters through the third air inlet holes 12 on the middle collection pipe 4. Finally, it is sensed by the second micro combustible gas sensor 6, and the specific data is transmitted to the microcontroller 6. The microcontroller 6 analyzes and processes the data. When the set data index is exceeded, it will control the micro alarm 9 to alarm, so as to remind the staff to take corresponding measures in time.

[0032] The combustible gas detection device for the battery box of the present invention has a simple structural design, effectively reducing the installation complexity; adopts a fast gas collection mechanism to promptly capture the leakage of combustible gas in the cabinet-type battery box; realizes all-round three-dimensional detection to eliminate monitoring blind spots; is equipped with high-precision sensors and a real-time feedback system to ensure the accuracy and reliability of the detection data; significantly improves the operation 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 the innovative detection architecture design, while ensuring the reliability of the system, it provides a dynamic and multi-dimensional gas monitoring solution for the safe operation of the battery box.

[0033] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A combustible gas detection device for a battery box, characterized in that: It includes a floor-standing battery box body (1). Combustible gas detection components (20) are installed at the corner positions inside the floor-standing battery box body (1). The combustible gas detection component (20) includes an upper collection pipe (2), a lower collection pipe (3), an intermediate collection pipe (4), a first micro combustible gas sensor (5), a second micro combustible gas sensor (6), a third micro combustible gas sensor (7), a micro controller (8), and a micro alarm (9). One end of the intermediate collection pipe (4) is connected to the upper collection pipe (2), and the other end of the intermediate collection pipe (4) is connected to the lower collection pipe (3). The upper collection pipe (2) and the lower collection pipe (3) are communicated through the intermediate collection pipe (4). A first air inlet hole (10) is provided in the upper part of the upper collection pipe (2), a second air inlet hole (11) is provided in the lower part of the lower collection pipe (3), and a third air inlet hole (12) is provided in the middle of the intermediate collection pipe (4). One side of the upper collection pipe (2) is communicated with the first micro combustible gas sensor (5), one side of the intermediate collection pipe (4) is communicated with the second micro combustible gas sensor (6), and one side of the lower collection pipe (3) is communicated with the third micro combustible gas sensor (7). The first micro combustible gas sensor (5), the second micro combustible gas sensor (6), and the third micro combustible gas sensor (7) are respectively signal-connected to the micro controller (8), and the micro controller (8) is signal-connected to the micro alarm (9).

2. The combustible gas detection device for a battery box according to claim 1, wherein: A first long pipe (13) and a first short pipe (14) are provided at the upper end of the upper collection pipe (2). The first long pipe (13) is arranged along the length direction of the floor-standing battery box body (1), and the first short pipe (14) is arranged along the width direction of the floor-standing battery box body (1). Both the first long pipe (13) and the first short pipe (14) are communicated with the upper collection pipe (2).

3. The combustible gas detection device for a battery box according to claim 2, wherein: First air inlet holes (10) are provided on the lower end surfaces of both the first long pipe (13) and the first short pipe (14).

4. The combustible gas detection device for a battery box according to claim 1, characterized in that: A second long pipe (15) and a second short pipe (16) are provided at the lower end of the lower collection pipe (3). The second long pipe (15) is arranged along the length direction of the floor-standing battery box body (1), and the second short pipe (16) is arranged along the width direction of the floor-standing battery box body (1). Both the second long pipe (15) and the second short pipe (16) are communicated with the lower collection pipe (3).

5. The combustible gas detection device for a battery box according to claim 4, characterized in that: Second air inlet holes (11) are provided on the upper end surfaces of both the second long pipe (15) and the second short pipe (16).

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

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

8. The combustible gas detection device for a battery box according to claim 1, wherein: A protective net (19) is installed at each corner position inside the cabinet-type battery box body (1), and the protective net (19) is located outside the combustible gas detection component (20).

9. The combustible gas detection device for a battery box according to claim 8, wherein: The protective net (19) is an arc-shaped structure that is recessed inward.

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