An explosion-proof valve film structure for monitoring leakage of an electric cell

Abstract

This utility model discloses an explosion-proof valve film structure for monitoring battery cell leakage, including a battery body and an explosion-proof valve disposed at the top of the battery body. The explosion-proof valve has an installation chamber, and a disassembly assembly is provided between the installation chamber and the battery body. A pH test strip is placed inside the installation chamber, and a viewing glass cover is sealed at the top of the installation chamber. When a leak occurs at the battery's explosion-proof valve, the gas reacts with the pH test strip inside the installation chamber, causing the strip to change color. This color change can be observed through the viewing glass, thus detecting the explosion-proof valve leak. When it is necessary to replace the test strip inside the explosion-proof valve, the installation chamber can be disassembled using the disassembly assembly, the test strip removed, and then reinstalled. This design prevents the pH test strip from falling off and increases the convenience of replacing the pH test strip.

Description

Technical Field

[0001] This utility model relates to the field of battery cell explosion-proof valve technology, and in particular to an explosion-proof valve diaphragm structure for monitoring battery cell leakage. Background Technology

[0002] Lithium-ion batteries, with their high energy density, strong power, and long lifespan, have become the preferred power source for electric vehicles, power tools, and other fields. In particular, their lack of memory effect and environmental friendliness perfectly match the performance demands of modern industry. In recent years, with the explosive growth of the new energy vehicle and energy storage industries, the lithium-ion battery market has entered a golden age of development.

[0003] As a core component of the lithium battery safety system, the explosion-proof valve ensures safe battery operation through a precise pressure sensing mechanism. This device is made of special alloy materials and achieves burst pressure threshold control through precise mechanical structure design. When the battery experiences thermal runaway, the explosion-proof valve can release pressure within milliseconds. The latest composite explosion-proof valve further integrates temperature sensing functionality, further enhancing its safety protection level. With the continuous improvement of battery energy density, explosion-proof valve technology is also developing towards intelligence and multi-functionality.

[0004] Patent document CN112787007A discloses a method and device for detecting and identifying leakage in a battery cover explosion-proof valve. The device includes a battery body and a battery cover mounted on the upper part of the battery body. An explosion-proof valve is disposed in the middle of the battery cover, and a leakage detection unit is disposed on the top of the explosion-proof valve. The leakage detection unit is equipped with leakage detection test paper. After the battery is filled with electrolyte, if the explosion-proof valve leaks electrolyte due to welding defects, the leaked electrolyte, upon contact with air, generates gas. When this gas comes into contact with the leakage detection test paper, the test paper will change color. The color change of the test paper can be visually observed to determine whether the explosion-proof valve is leaking. This invention can quickly and easily determine whether the explosion-proof valve has welding defects and identify abnormal batteries, preventing abnormal batteries from entering subsequent processes, entering the market, and causing greater safety hazards. It reduces detection costs while ensuring the safety of battery use.

[0005] As in the prior art of the aforementioned patent, the device fixes the pH test paper to the leak port of the explosion-proof valve by adhesive. During battery use, the heat generated by the battery will affect the adhesive on the test paper. If used for too long, the protective film may fall off. Secondly, the pH test paper also has a shelf life. The battery did not leak within the shelf life of the pH test paper. When the pH test paper expires, it needs to be replaced in time. However, when replacing the pH test paper, the protective film needs to be peeled off and then the pH test paper needs to be re-adhered. This process may leave waste pH test paper residue, which is quite troublesome to clean up. Utility Model Content

[0006] The purpose of this invention is to provide an explosion-proof valve diaphragm structure for monitoring battery cell leakage, so as to solve the above-mentioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof valve film structure for monitoring cell leakage, comprising a battery body and an explosion-proof valve disposed on the top of the battery body, wherein the explosion-proof valve is provided with an installation compartment, a disassembly assembly is provided between the installation compartment and the battery body, a pH test strip is provided inside the installation compartment, and a visual glass cover is sealed at the top of the installation compartment.

[0008] As a further description of the above technical solution: two connecting rods are fixedly installed on the inner walls of both sides of the installation chamber, and a conical fixing component is provided on each of the two connecting rods. A pH test strip is fixedly installed between the two conical fixing components. The pH test strip is penetrated by the conical fixing components on both sides and is located below the visualization glass cover.

[0009] As a further description of the above technical solution: the disassembly and assembly assembly includes a slot formed around the explosion-proof valve, and the installation compartment is adapted to the slot.

[0010] As a further description of the above technical solution: the disassembly and assembly assembly also includes fixing hooks disposed on both sides of the slot. The fixing hooks are fixedly connected to the top of the installation chamber. The installation chamber has two first sliding grooves inside. A sliding plate is slidably installed inside each of the two first sliding grooves. The sliding plate is L-shaped. A snap-fit ​​hook is fixedly installed at the bottom of the vertical end of the sliding plate. The snap-fit ​​hook is compatible with the fixing hook.

[0011] As a further description of the above technical solution: the installation compartment has a second sliding groove inside, which is located between the two first sliding grooves. Two sliding blocks are slidably installed inside the second sliding groove. The two sliding blocks are fixedly connected to one end of the horizontal end of the two sliding plates, and a spring is connected between the two sliding blocks.

[0012] As a further description of the above technical solution: the top of the installation chamber has two through slots and an arc-shaped plate. The two ends of the arc-shaped plate pass through the through slots and are fixedly connected to two sliding blocks respectively. An elastic telescopic member is provided between the bottom end of the arc-shaped plate and the top of the installation chamber.

[0013] This invention provides an explosion-proof valve membrane structure for monitoring battery cell leakage. It offers the following advantages: When a leak occurs at the battery's explosion-proof valve, the gas reacts with the pH test paper inside the mounting chamber, causing the paper to change color. This color change can be observed through a viewing glass, thus detecting the explosion-proof valve leak. When it's necessary to replace the test paper inside the explosion-proof valve, the mounting chamber can be disassembled using the disassembly assembly, the test paper removed, and then reinstalled. This design prevents the pH test paper from falling off and increases the convenience of replacing it.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the explosion-proof valve diaphragm structure for monitoring battery cell leakage proposed in this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the installation compartment during disassembly of this utility model;

[0018] Figure 3 This utility model Figure 2 A magnified structural diagram at point A;

[0019] Figure 4 This is a three-dimensional structural diagram of the interior of the installation compartment of this utility model;

[0020] Figure 5 This is a cross-sectional view of the interior of the installation compartment of this utility model.

[0021] Figure 6 This is a cross-sectional structural diagram of the first and second slide grooves of this utility model;

[0022] Figure 7 This is a three-dimensional cross-sectional view of the installation compartment of this utility model.

[0023] Legend:

[0024] 1. Battery body; 2. Explosion-proof valve; 3. Installation compartment; 4. Slot; 5. Fixing hook; 6. Snap-fit ​​hook; 7. First slide groove; 8. Second slide groove; 9. Sliding plate; 10. Sliding block; 11. Spring; 12. Arc plate; 13. Through groove; 14. Elastic telescopic component; 15. Visual glass cover; 16. Connecting rod; 17. Conical fixing component; 18. pH test paper. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1-7 A membrane structure for monitoring battery cell leakage includes a battery body 1 and an explosion-proof valve 2 disposed at the top of the battery body 1. The explosion-proof valve 2 has an installation chamber 3, and a disassembly assembly is provided between the installation chamber 3 and the battery body 1. A pH test strip 18 is disposed inside the installation chamber 3, and a viewing glass cover 15 is sealed at the top of the installation chamber 3. When leakage occurs at the explosion-proof valve 2, the gas reacts with the pH test strip 18 inside the installation chamber 3, causing the test strip to change color. This color change can be observed through the viewing glass, thus detecting the leakage in the explosion-proof valve 2. When it is necessary to replace the test strip inside the explosion-proof valve 2, the installation chamber 3 can be disassembled using the disassembly assembly, the test strip removed from the installation chamber 3, and then reinstalled. This design prevents the pH test strip 18 from falling off and increases the convenience of replacing the pH test strip 18.

[0027] As a preferred technical solution in this embodiment, two connecting rods 16 are fixedly installed on the inner walls of both sides of the installation chamber 3. Each of the two connecting rods 16 is provided with a conical fixing member 17. A pH test strip 18 is fixedly disposed between the two conical fixing members 17. The pH test strip 18 is penetrated by the conical fixing members 17 on both sides and is disposed below the visualization glass cover 15. The conical fixing members 17 can easily pierce the pH test strip 18 and fix the pH test strip 18 inside the installation chamber 3, which increases the convenience of replacing the test strip.

[0028] As a preferred technical solution in this embodiment, the disassembly and assembly component includes a slot 4 formed around the explosion-proof valve 2, and the installation chamber 3 is adapted to the slot 4; installing the installation chamber 3 and the slot 4 can improve the sealing of the installation chamber 3, so that the pH test paper 18 can stably contact the leaked gas.

[0029] As a preferred embodiment, the disassembly and assembly assembly further includes fixing hooks 5 on both sides of the slot 4. The fixing hooks 5 are fixedly connected to the top of the installation chamber 3. The installation chamber 3 has two first sliding grooves 7 inside, and a sliding plate 9 is slidably installed inside each of the two first sliding grooves 7. The sliding plate 9 is L-shaped, and a snap-fit ​​hook 6 is fixedly installed at the bottom of the vertical end of the sliding plate 9. The snap-fit ​​hook 6 is compatible with the fixing hook 5. When the installation chamber 3 needs to be installed, the installation chamber 3 is snapped into the inside of the slot 4. At this time, the snap-fit ​​hook 6 can contact the top of the fixing hook 5. At this time, the snap-fit ​​hook 6 can drive the sliding plate 9 to slide outward. When it slides to a certain position, the snap-fit ​​hook 6 can lock the fixing hook 5 under the tension of the spring 11. At this time, the installation chamber 3 is locked inside the slot 4, which can limit the installation chamber 3 and prevent the installation chamber 3 from falling off.

[0030] As a preferred technical solution of this embodiment, the installation chamber 3 is provided with a second sliding groove 8, which is located between two first sliding grooves 7. Two sliding blocks 10 are slidably installed inside the second sliding groove 8. The two sliding blocks 10 are fixedly connected to one end of the horizontal end of the two sliding plates 9. A spring 11 is connected between the two sliding blocks 10. The spring 11 can provide a pulling force on the sliding plates 9 on both sides and the locking hook 6, so that the locking hook 6 is tightly connected to the fixed hook 5.

[0031] As a preferred technical solution in this embodiment, the top of the installation chamber 3 has two through slots 13 and an arc plate 12. The two ends of the arc plate 12 pass through the through slots 13 and are fixedly connected to two sliding blocks 10 respectively. An elastic telescopic member 14 is provided between the bottom end of the arc plate 12 and the top end of the installation chamber 3. When the installation chamber 3 needs to be disassembled, the arc plate 12 is pressed down, and the arc plate 12 can squeeze the sliding plate 9 to both sides and outward, so that the sliding plate 9 drives the locking hook 6 to leave the fixing hook 5, and then the installation chamber 3 can be disassembled. The disassembly and installation process is relatively convenient.

[0032] 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. An explosion-proof valve film structure for monitoring leakage of an electric cell, comprising a battery body (1) and an explosion-proof valve (2) arranged at the top end of the battery body (1), characterized in that, The explosion-proof valve (2) is provided with an installation chamber (3), and a disassembly assembly is provided between the installation chamber (3) and the battery body (1). The installation chamber (3) is provided with a pH test paper (18), and the top of the installation chamber (3) is sealed with a visual glass cover (15).

2. The explosion-proof valve diaphragm structure for monitoring battery cell leakage according to claim 1, characterized in that, Two connecting rods (16) are fixedly installed on the inner walls of both sides of the installation chamber (3). Each of the two connecting rods (16) is provided with a conical fixing part (17). A pH test paper (18) is fixedly installed between the two conical fixing parts (17). The pH test paper (18) is penetrated by the conical fixing parts (17) on both sides and is located below the visualization glass cover (15).

3. The explosion-proof valve diaphragm structure for monitoring battery cell leakage according to claim 1, characterized in that, The assembly includes a slot (4) around the explosion-proof valve (2), and the mounting compartment (3) is adapted to the slot (4).

4. The explosion-proof valve diaphragm structure for monitoring battery cell leakage according to claim 1, characterized in that, The assembly and disassembly assembly also includes fixing hooks (5) on both sides of the slot (4). The fixing hooks (5) are fixedly connected to the top of the installation chamber (3). The installation chamber (3) has two first sliding grooves (7) inside. Sliding plates (9) are slidably installed inside the two first sliding grooves (7). The sliding plates (9) are L-shaped. A snap-fit ​​hook (6) is fixedly installed at the bottom of the vertical end of the sliding plate (9). The snap-fit ​​hook (6) is compatible with the fixing hook (5).

5. The explosion-proof valve diaphragm structure for monitoring battery cell leakage according to claim 1, characterized in that, The installation compartment (3) has a second slide groove (8) inside. The second slide groove (8) is located between two first slide grooves (7). Two sliding blocks (10) are slidably installed inside the second slide groove (8). The two sliding blocks (10) are fixedly connected to one end of the horizontal end of the two sliding plates (9). A spring (11) is connected between the two sliding blocks (10).

6. The explosion-proof valve diaphragm structure for monitoring battery cell leakage according to claim 1, characterized in that, The top of the installation chamber (3) has two through slots (13) and an arc plate (12). The two ends of the arc plate (12) pass through the through slots (13) and are fixedly connected to two sliding blocks (10) respectively. An elastic telescopic member (14) is provided between the bottom end of the arc plate (12) and the top end of the installation chamber (3).

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