Anti-explosion sheet and battery
The explosion-proof disc with sequential pressure zones and grooves enhances battery safety by accurately detecting and relieving pressure, addressing the limitations of existing designs.
Patent Information
- Application Number
- CN202422084228.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-26
AI Technical Summary
Existing explosion-proof discs are difficult to accurately detect internal air pressure when the battery cover length exceeds the set length, affecting battery safety.
An explosion-proof plate is designed, with multiple explosion-proof areas on the sheet body, and there are marking grooves on the circumference of the explosion-proof area. The marking grooves are arranged along the circumference and gradually shrinking in width. There are thickened rings on both sides of the sheet body to ensure accurate detection of air pressure within different size ranges and accurate blasting is achieved.
It realizes accurate detection of internal air pressure on the top covers of different sizes of batteries, improving the safety of the battery and the accuracy of blasting.
Smart Images
Figure CN223109144U_ABST
Abstract
Description
Technical Field
[0001] The utility model patent relates to the technical field of batteries, and more specifically, to an explosion-proof sheet and a battery. Background Art
[0002] A rupture disk, also known as an explosion-proof sheet or explosion-proof membrane, relieves pressure by the rupture of the membrane, and the container is forced to stop operating after the pressure is relieved.
[0003] Rupture disks are widely used in batteries. When an abnormality occurs inside the battery and the pressure exceeds the bearing pressure, the rupture disk breaks, thereby playing a role in relieving pressure.
[0004] In the prior art, the rupture disk can only be used for the battery top cover within a set length. For example, when the length is within the range of L ≤ 300, it has limitations. When the length of the battery top cover exceeds the set length, the rupture disk cannot accurately detect the internal air pressure of the battery during the detection, thus affecting the explosion of the battery and reducing the safety of the battery. Summary of the Utility Model
[0005] The purpose of the present utility model is to provide an explosion-proof sheet, aiming to solve the problem that it is difficult for the rupture disk in the prior art to accurately detect the internal air pressure.
[0006] The present utility model is realized as follows. The explosion-proof sheet includes a sheet-shaped body in a strip shape. A plurality of explosion-proof areas are provided on the body, and the plurality of explosion-proof areas are arranged in sequence on the body. A scoring groove is formed on the periphery of the explosion-proof area, and the scoring groove extends along the periphery of the explosion-proof area.
[0007] Furthermore, along the arrangement direction of the plurality of explosion-proof areas, the explosion-proof areas extend in a long strip shape.
[0008] Furthermore, the scoring groove is arranged in an open-loop manner along the circumference of the explosion-proof area, and along the depth direction of the scoring groove, the width of the scoring groove gradually decreases.
[0009] Furthermore, a thickening ring for fixing the body by welding to the outside is formed on the periphery of the body.
[0010] Furthermore, along the thickness direction of the body, both sides of the body respectively have side surfaces, and the scoring groove is formed on the side surfaces.
[0011] Furthermore, the scoring groove is formed on only one of the side surfaces.
[0012] Furthermore, the scoring grooves are respectively formed on both of the side surfaces.
[0013] Furthermore, the plurality of explosion-proof areas are arranged at intervals in sequence, and the scoring grooves on the peripheries of adjacent explosion-proof areas are arranged at intervals.
[0014] Further, the notch grooves of adjacent explosion-proof areas are butted.
[0015] Compared with the prior art, the explosion-proof sheet provided by the present utility model has a plurality of explosion-proof areas formed on the sheet body, and the plurality of explosion-proof areas are arranged in sequence on the sheet body. When the explosion-proof sheet is in use, within the size range of the sheet body, the internal air pressure can be detected in all the explosion-proof areas, so that the explosion-proof sheet can accurately detect the internal air pressure of a battery or the like, and the explosion-proof areas can achieve precise blasting, greatly improving safety.
[0016] The present utility model also provides a battery, which includes a battery body and the above-mentioned explosion-proof sheet, and the explosion-proof sheet is arranged on the battery body.
[0017] Compared with the prior art, for the battery provided in this embodiment, since the explosion-proof sheet can accurately detect the internal air pressure of the battery and the explosion-proof areas can achieve precise blasting, the safety of the battery is greatly improved. Description of the Drawings
[0018] Figure 1 is a three-dimensional schematic diagram of the explosion-proof sheet provided by the present utility model;
[0019] Figure 2 is a partial sectional view of the bursting disc provided by the present utility model;
[0020] Figure 3 is a three-dimensional schematic diagram of the explosion-proof sheet provided by the present utility model;
[0021] In the figure: sheet body 100; explosion-proof area 200; notch groove 300, straight section 301, curved section 302, fixing part 303; thickening ring 400. Detailed Embodiments
[0022] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model 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 utility model and are not used to limit the present utility model.
[0023] The implementation of the present utility model will be described in detail below with reference to specific embodiments.
[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0025] Referring to Figures 1-3 as shown, it is a preferred embodiment provided by the present utility model.
[0026] The explosion-proof film provided in this embodiment can be connected to the battery top cover and used in the battery. Of course, it can also be used in other containers as long as it needs to perform blasting and pressure relief.
[0027] The explosion-proof film includes a strip-shaped sheet body 100. The shape of the sheet body 100 can be diversified and can be in a regular shape, such as oval or circular, etc. Of course, according to specific needs, it can also be in an irregular shape.
[0028] A plurality of explosion-proof areas 200 are provided on the sheet body 100. The plurality of explosion-proof areas 200 are arranged in sequence on the sheet body 100. They can be arranged along the length direction of the sheet body 100 or along the width direction of the sheet body 100; a scoring groove 300 is formed on the periphery of the explosion-proof area 200, and the scoring groove 300 extends along the periphery of the explosion-proof area 200.
[0029] By setting the scoring groove 300, the thickness of the periphery of the explosion-proof area 200 is thinned. In this way, when the explosion-proof film is used in the battery, when the internal air pressure of the battery is higher than the set pressure value, the explosion-proof film will use the scoring groove 300 as the blasting path, causing the blasting area to blast, thereby achieving the effect of pressure relief and avoiding the explosion of the battery when used in the battery.
[0030] For the above-mentioned explosion-proof film provided, a plurality of explosion-proof areas 200 are formed on the sheet body 100, and the plurality of explosion-proof areas 200 are arranged in sequence on the sheet body 100. When the explosion-proof film is in use, within the size range of the sheet body 100, the internal air pressure can be detected in all the plurality of explosion-proof areas 200, so that the explosion-proof film can accurately detect the internal air pressure of the battery, etc., and the explosion-proof area 200 can achieve accurate blasting, greatly improving safety.
[0031] In some embodiments, multiple scoring grooves 300 may be provided. The multiple scoring grooves 300 are independently arranged, and the multiple scoring grooves 300 respectively correspond to the multiple explosion-proof areas 200 one by one. Alternatively, there may be only one scoring groove 300, which extends along the multiple explosion-proof areas 200. Specifically, it can be set according to the actual situation, not limited to a specific arrangement.
[0032] Along the arrangement direction of the multiple explosion-proof areas 200, the explosion-proof areas 200 extend in a long strip shape. In this way, the coverage range of the explosion-proof areas 200 in the length direction of the sheet body 100 can be increased, and the ability of the explosion-proof sheet to accurately detect the internal air pressure can be greatly improved.
[0033] As a preferred option, along the length direction of the sheet body 100, the explosion-proof areas 200 extend in a long strip shape, which can increase the coverage range of the explosion-proof areas 200 in the length direction of the sheet body 100.
[0034] In some embodiments, the scoring groove 300 is arranged in an open loop along the circumference of the explosion-proof area 200. Here, the open loop means that the scoring groove 300 is in the shape of an open ring.
[0035] As a preferred option, the scoring groove 300 includes a straight segment 301 and two bent segments 302. The ends of the straight segment 301 extend outwards respectively to form the above-mentioned bent segments 302. The ends of the two bent segments 302 are arranged at intervals, and a fixing part 303 integrated with the sheet body 100 is formed.
[0036] The ends of the two bent segments 302 are arranged at intervals, so that the scoring groove 300 is arranged in a disconnected manner, that is, an open ring shape is formed. In this way, when the explosion-proof area 200 explodes, the scoring groove 300 is disconnected from the sheet body 100, and the explosion-proof area 200 swings upwards with the fixing part 303 as the swinging position, ensuring the accuracy of the explosion position of the explosion-proof area 200.
[0037] In some embodiments, along the depth direction of the scoring groove 300, the width of the scoring groove 300 gradually decreases. In this way, the scoring groove 300 is arranged in a flared shape, which is beneficial to the explosion of the explosion-proof area 200, thereby improving the ability of the explosion-proof sheet to accurately detect the internal pressure.
[0038] In some embodiments, a thickening ring 400 for welding with the outside to fix the sheet body 100 is formed on the peripheral side of the sheet body 100. Along the thickness direction of the sheet body 100, the thickening ring 400 and the sheet body 100 are arranged in a dislocation manner, or the thickening ring 400 can also be directly butted with the sheet body 100.
[0039] In this way, during the manufacturing process of the explosion-proof sheet, the explosion-proof sheet will not be deformed due to its excessive length or thinner thickness. Secondly, when the sheet body 100 is fixedly connected to the outside, the blasting position of the explosion-proof sheet will not be deformed due to welding pulling.
[0040] In some embodiments, along the thickness direction of the sheet body 100, both sides of the sheet body 100 respectively have side surfaces, and the notch grooves 300 are formed on the side surfaces. In this way, during the integral molding manufacturing of the sheet body 100, the notch grooves 300 can be formed on the side surfaces synchronously, facilitating the formation of the notch grooves 300.
[0041] In some embodiments, only the above-mentioned notch grooves 300 are formed on one side surface, which can simplify the molding manufacturing of the sheet body 100.
[0042] Or, the above-mentioned notch grooves 300 are respectively formed on both side surfaces. In this way, it is equivalent to thinning the two sides of the periphery of the explosion-proof area 200 respectively to form the notch grooves 300, which facilitates the blasting of the blasting area and thus improves the ability of the explosion-proof sheet to accurately detect the internal pressure.
[0043] In some embodiments, a plurality of explosion-proof areas 200 are arranged at intervals in sequence, and the notch grooves 300 on the peripheries of adjacent explosion-proof areas 200 are arranged at intervals. In this way, the covering length of the plurality of explosion-proof areas 200 within the dimension range of the sheet body 100 can be increased, thus greatly improving the ability of the explosion-proof sheet to accurately detect the internal pressure.
[0044] Or, the notch grooves 300 of adjacent explosion-proof areas 200 are butted, which can be applied to some sheet bodies 100 with moderate lengths and improve the accurate blasting ability of the blasting area.
[0045] This embodiment also provides a battery, which includes a battery body and the above-mentioned explosion-proof sheet, and the explosion-proof sheet is arranged on the battery body. Since the explosion-proof sheet can accurately detect the internal air pressure of the battery and the explosion-proof area 200 can achieve accurate blasting, the safety of the battery is greatly improved.
[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. Explosion-proof film, characterized in that, It includes a sheet body (100) in the shape of a strip. A plurality of explosion-proof areas (200) are provided on the sheet body (100), and the plurality of explosion-proof areas (200) are arranged in sequence on the sheet body (100); a scoring groove (300) is formed on the peripheral side of the explosion-proof area (200), and the scoring groove (300) extends along the peripheral side of the explosion-proof area (200).
2. The explosion-proof sheet according to claim 1, wherein, Along the arrangement direction of the plurality of explosion-proof areas (200), the explosion-proof areas (200) extend in a long strip shape.
3. The explosion-proof sheet according to claim 1, characterized in that The scoring groove (300) is arranged in an open-loop manner along the circumference of the explosion-proof area (200), and along the depth direction of the scoring groove (300), the width of the scoring groove (300) gradually decreases.
4. The explosion-proof sheet according to claim 1, characterized in that, A thickening ring (400) for welding with the outside to fix the sheet body (100) is formed on the peripheral side of the sheet body (100).
5. The explosion-proof film according to claim 1, characterized in that, Along the thickness direction of the sheet body (100), both sides of the sheet body (100) respectively have side surfaces, and the scoring groove (300) is formed on the side surfaces.
6. The explosion-proof film according to claim 5, characterized in that, The scoring groove (300) is formed on only one of the side surfaces.
7. The explosion-proof sheet according to claim 6, wherein The scoring grooves (300) are respectively formed on the two side surfaces.
8. The explosion-proof piece according to any one of claims 1 to 7, characterized in that, The plurality of explosion-proof areas (200) are arranged at intervals in sequence, and the scoring grooves (300) on the peripheral sides of adjacent explosion-proof areas (200) are arranged at intervals.
9. The explosion-proof sheet according to any one of claims 1 to 7, characterized in that, The scoring grooves (300) of adjacent explosion-proof areas (200) are butted.
10. A battery, characterized in that, It includes a battery body and the explosion-proof sheet according to any one of claims 1 to 9, and the explosion-proof sheet is provided on the battery body.