An electrochemical energy storage battery pack internal pressure monitoring and alarming device

Abstract

The utility model belongs to the technical field of battery monitoring, especially a kind of battery pack internal pressure monitoring alarm device for electrochemical energy storage, the problem of not timely monitoring and lacking pressure reduction mechanism is proposed for the background technology, the following scheme is presented, including battery pack, the outer wall of battery pack top is provided with sealing cover, and the inside of battery pack is provided with pressure monitoring component and pressure reduction component respectively, the pressure monitoring component includes air pressure sensor, pressure monitoring probe, characteristic gas sensor, alarm.The utility model realizes the real-time dynamic monitoring of the internal pressure of battery pack and characteristic gas by the effect of integrated pressure monitoring component, solves the problem of response lag of traditional technology, provides key time window for early fault diagnosis and emergency treatment, pressure reduction component can effectively inhibit thermal runaway diffusion, not only improves safety performance, but also reduces manual intervention demand, realizes automatic emergency treatment.

Description

Technical Field

[0001] This utility model relates to the field of battery monitoring technology, and in particular to a pressure monitoring and alarm device for an electrochemical energy storage battery pack. Background Technology

[0002] Electrochemical energy storage battery packs are core components for renewable energy storage and electric vehicle power sources, and their safety and stability are of paramount importance. During charging and discharging, internal chemical reactions can cause heat buildup, which can easily trigger thermal runaway, especially under extreme conditions. Thermal runaway not only leads to a sharp decline in battery performance but also releases large amounts of characteristic gases (such as hydrogen and carbon monoxide), accompanied by a sudden increase in internal pressure, posing an explosion risk and seriously threatening equipment and personal safety. Current technologies for monitoring internal pressure and gas leaks in battery packs are relatively outdated. Traditional pressure sensors are mostly located externally to the battery, making it difficult to detect minute internal pressure changes in a timely manner; characteristic gas detection relies on periodic manual inspections, resulting in slow response times. When thermal runaway occurs, internal pressure rises rapidly and the concentration of characteristic gases surges, and existing devices cannot immediately trigger alarms and initiate emergency procedures, leading to an escalation of safety hazards. Furthermore, the lack of an active depressurization mechanism makes it difficult to quickly expel hazardous gases and reduce pressure, further exacerbating the risk of accidents. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a pressure monitoring and alarm device for electrochemical energy storage battery packs, which overcomes the deficiencies of existing technologies and effectively solves the problems of untimely monitoring and lack of pressure reduction mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An internal pressure monitoring and alarm device for an electrochemical energy storage battery pack includes a battery pack with a sealing cover on the top outer wall. The battery pack contains a pressure monitoring component and a pressure reduction component. The pressure monitoring component includes a pressure sensor, a pressure monitoring probe, a characteristic gas sensor, and an alarm. The pressure sensor is fixedly connected to one side of the outer wall of the battery pack with screws. The pressure monitoring probe is installed on one side of the pressure sensor. The characteristic gas sensor is located on the top inner wall of the sealing cover. The characteristic gas sensor and the pressure sensor are connected by a signal line. The alarm is installed on the other side of the outer wall of the pressure sensor.

[0005] Preferably, the pressure-reducing assembly includes a negative pressure tank, an air intake pipe, an air intake head, a solenoid valve, and a rectangular positioning frame. The negative pressure tank is located inside the battery pack on one side. The air intake pipe is fixedly connected to the outer wall of one end of the negative pressure tank and is located between the battery pack and the sealing cap. The air intake head is fixedly connected to the bottom outer wall of the air intake pipe, and the solenoid valve is installed on the outer wall of the end of the air intake pipe near the negative pressure tank.

[0006] Preferably, a cross plate is welded to the inner wall of the bottom of the battery pack, and an array of battery positioning plates are welded to the outer wall of the cross plate. An array of batteries is placed inside the battery pack between the cross plate and the battery positioning plates.

[0007] Preferably, a partition is welded to one side of the inner wall of the bottom of the battery pack, and symmetrically distributed gaskets are fixedly connected to the top of the outer wall of one side of the partition by screws. An arc-shaped groove is opened on the outer wall of the top of the gasket, and the air intake pipe is placed on the inner wall of the arc-shaped groove of the gasket.

[0008] Preferably, a clamp is fixedly connected to one side of the outer wall of the partition by screws, and the negative pressure tank is installed on the inner wall of the clamp.

[0009] Preferably, the inner wall of the top of the sealing cover is fixedly connected with an array of mounting sleeves by screws, and the feature gas sensor is fixedly mounted on the inner wall of the mounting sleeves.

[0010] Preferably, a pressure display screen is provided on the outer wall of the other side of the pressure sensor, located on one side of the alarm.

[0011] The beneficial effects of this utility model are as follows: 1. The pressure monitoring and alarm device for the electrochemical energy storage battery pack designed in this paper realizes real-time dynamic monitoring of the internal pressure and characteristic gases of the battery pack by integrating a gas pressure monitoring component. The gas pressure sensor and the gas pressure monitoring probe work together to accurately capture minute pressure fluctuations inside the battery pack, and the characteristic gas sensor detects changes in gas composition in real time. Once the pressure or gas concentration exceeds the threshold, the alarm will immediately trigger an audible and visual alarm, which solves the problem of delayed response in traditional technology and provides a critical time window for early fault diagnosis and emergency handling. 2. The pressure monitoring and alarm device inside the battery pack for electrochemical energy storage designed in this paper has a pressure reduction component that, through the linkage design of a negative pressure tank, a suction pipe, a suction head, and a solenoid valve, can be quickly activated after the alarm is triggered. The suction head is accurately positioned to the gas accumulation area. Once the solenoid valve is opened, the negative pressure tank actively draws in the characteristic gas and reduces the internal pressure of the battery pack, effectively suppressing the spread of thermal runaway. This not only improves safety performance but also reduces the need for manual intervention and realizes automated emergency handling. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the overall structure of a pressure monitoring and alarm device for an electrochemical energy storage battery pack proposed in this utility model. Figure 2 This is a schematic diagram showing the overall structure of a pressure monitoring and alarm device for an electrochemical energy storage battery pack proposed in this utility model. Figure 3 This is a schematic diagram of the battery pack structure of the electrochemical energy storage battery pack internal pressure monitoring and alarm device proposed in this utility model; Figure 4 This is a schematic diagram of the gas pressure monitoring component structure of a pressure monitoring and alarm device for an electrochemical energy storage battery pack proposed in this utility model; Figure 5 This is a schematic diagram of the pressure reduction component of a pressure monitoring and alarm device for an electrochemical energy storage battery pack proposed in this utility model.

[0013] In the diagram: 1. Battery pack; 2. Barometric pressure monitoring assembly; 21. Barometric pressure sensor; 22. Barometric pressure monitoring probe; 23. Characteristic gas sensor; 24. Alarm; 3. Pressure reduction assembly; 31. Negative pressure tank; 32. Suction pipe; 33. Suction head; 34. Solenoid valve; 4. Rectangular positioning frame; 5. Sealing cover; 6. Cross plate; 7. Battery positioning plate; 8. Battery; 9. Separator; 10. Gasket; 11. Clamp; 12. Mounting sleeve; 13. Barometric pressure display screen. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1-5 Example 1: A pressure monitoring and alarm device for an electrochemical energy storage battery pack includes a battery pack 1. A sealing cover 5 is provided on the top outer wall of the battery pack 1. A pressure monitoring component 2 and a pressure reduction component 3 are respectively provided inside the battery pack 1. The pressure monitoring component 2 includes a pressure sensor 21, a pressure monitoring probe 22, a characteristic gas sensor 23, and an alarm 24. The pressure sensor 21 is fixedly connected to one side of the outer wall of the battery pack 1 by screws. The pressure monitoring probe 22 is installed on one side of the pressure sensor 21. The characteristic gas sensor 23 is located on the top inner wall of the sealing cover 5. The characteristic gas sensor 23 and the pressure sensor 21 are connected by a signal line. The alarm 24 is installed on the other side of the outer wall of the pressure sensor 21. An array of mounting sleeves 12 are fixedly connected to the top inner wall of the sealing cover 5 by screws. The characteristic gas sensor 23 is fixedly installed on the inner wall of the mounting sleeves 12. A pressure display screen 13 is provided on the other side of the outer wall of the pressure sensor 21, located on the side of the alarm 24.

[0016] In this embodiment, the top of the battery pack 1 is sealed by the sealing cover 5. The air pressure sensor 21 of the air pressure monitoring component 2 inside the battery pack 1 is fixed on the side wall of the battery pack 1. The air pressure monitoring probe 22 extends to the gap at the top of the battery 8 to directly contact the internal environment of the battery pack 1. The characteristic gas sensor 23 is fixed to the inner wall of the top of the sealing cover 5 by the mounting sleeve 12 and is connected to the air pressure sensor 21 through a signal line to achieve data synchronization. The air pressure display screen 13 is used to display the pressure value in real time for easy and intuitive monitoring.

[0017] In embodiment 2, the pressure reducing component 3 includes a negative pressure tank 31, an air intake pipe 32, an air intake head 33, a solenoid valve 34, and a rectangular positioning frame 4. The negative pressure tank 31 is located inside the battery pack 1 on one side. The air intake pipe 32 is fixedly connected to the outer wall of one end of the negative pressure tank 31 and is located between the battery pack 1 and the sealing cover 5. The air intake head 33 is fixedly connected to the bottom outer wall of the air intake pipe 32. The solenoid valve 34 is installed on the outer wall of the end of the air intake pipe 32 near the negative pressure tank 31.

[0018] In this embodiment, the negative pressure tank 31 is fixed to the side wall of the partition 9 by the clamp 11, the suction pipe 32 is arranged between the battery pack 1 and the sealing cover 5, and the suction head 33 is located on top of the battery 8 to cover the area where gas tends to accumulate. The solenoid valve 34 is controlled by the signal of the air pressure sensor 21 and automatically opens when the threshold is exceeded, starting the negative pressure suction.

[0019] A cross plate 6 is welded to the inner wall of the bottom of the battery pack 1, and an array of battery positioning plates 7 are welded to the outer wall of the cross plate 6. An array of batteries 8 are placed inside the battery pack 1 between the cross plate 6 and the battery positioning plates 7.

[0020] The cross plate 6 and the battery positioning plate 7 are welded to the bottom of the battery pack 1 to form a matrix-style slot, ensuring that the batteries 8 are arranged stably.

[0021] A partition 9 is welded to one side of the bottom inner wall of the battery pack 1, and symmetrically distributed gaskets 10 are fixedly connected to the top of the outer wall of the partition 9 by screws. An arc-shaped groove is opened on the top outer wall of the gasket 10, and the suction pipe 32 is placed on the inner wall of the arc-shaped groove of the gasket 10. A clamp 11 is fixedly connected to the outer wall of the partition 9 by screws, and the negative pressure tank 31 is installed on the inner wall of the clamp 11.

[0022] The arc-shaped groove design of the partition 9 and the gasket 10 provides physical support for the intake pipe 32, preventing vibration and displacement.

[0023] Working principle: Real-time monitoring: The pressure sensor 21 continuously collects the pressure data inside the battery pack 1 through the pressure monitoring probe 22, and the characteristic gas sensor 23 simultaneously detects the gas composition. The data is transmitted to the control unit of the pressure sensor 21 in real time. Threshold judgment: When the pressure value or gas concentration exceeds the preset safety threshold, the control unit triggers the alarm 24 to issue an audible and visual alarm and displays the abnormal parameters through the air pressure display screen 13. Emergency pressure reduction: The alarm signal simultaneously activates the pressure reduction component 3. After the solenoid valve 34 is opened, the negative pressure tank 31 quickly draws in the characteristic gas through the suction pipe 32 and the suction head 33 to reduce the internal pressure of the battery pack 1 until the parameters return to normal.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure monitoring and alarm device for an electrochemical energy storage battery pack, comprising a battery pack (1), characterized in that, The battery pack (1) has a sealing cover (5) on its top outer wall, and the battery pack (1) has a pressure monitoring component (2) and a pressure reduction component (3) respectively inside. The pressure monitoring component (2) includes a pressure sensor (21), a pressure monitoring probe (22), a characteristic gas sensor (23), and an alarm (24). The pressure sensor (21) is fixedly connected to one side of the outer wall of the battery pack (1) by screws. The pressure monitoring probe (22) is installed on one side of the pressure sensor (21). The characteristic gas sensor (23) is set on the top inner wall of the sealing cover (5). The characteristic gas sensor (23) and the pressure sensor (21) are connected by a signal line. The alarm (24) is installed on the other side of the outer wall of the pressure sensor (21).

2. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 1, characterized in that, The pressure reduction assembly (3) includes a negative pressure tank (31), an air intake pipe (32), an air intake head (33), a solenoid valve (34), and a rectangular positioning frame (4). The negative pressure tank (31) is located inside the battery pack (1) on one side. The air intake pipe (32) is fixedly connected to the outer wall of one end of the negative pressure tank (31) and is located between the battery pack (1) and the sealing cover (5). The air intake head (33) is fixedly connected to the bottom outer wall of the air intake pipe (32). The solenoid valve (34) is installed on the outer wall of the end of the air intake pipe (32) near the negative pressure tank (31).

3. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 1, characterized in that, The bottom inner wall of the battery pack (1) is welded with a cross plate (6), and the outer wall of the cross plate (6) is welded with an array of battery positioning plates (7). An array of batteries (8) are placed inside the battery pack (1) between the cross plate (6) and the battery positioning plates (7).

4. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 1, characterized in that, A partition (9) is welded to one side of the bottom inner wall of the battery pack (1), and a symmetrically distributed gasket (10) is fixedly connected to the top of the outer wall of one side of the partition (9) by screws. An arc groove is opened on the top outer wall of the gasket (10), and the air intake pipe (32) is placed on the inner wall of the arc groove of the gasket (10).

5. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 4, characterized in that, The outer wall of one side of the partition (9) is fixedly connected to a clamp (11) by screws, and the negative pressure tank (31) is installed on the inner wall of the clamp (11).

6. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 1, characterized in that, The sealing cover (5) has an array of mounting sleeves (12) fixedly connected to its inner top wall by screws, and the feature gas sensor (23) is fixedly installed on the inner wall of the mounting sleeve (12).

7. The pressure monitoring and alarm device for an electrochemical energy storage battery pack according to claim 1, characterized in that, The outer wall of the pressure sensor (21) is provided with a pressure display screen (13) on the other side of the alarm (24).

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