Explosion-proof membrane structure capable of prolonging service life

Abstract

The utility model discloses an explosion-proof membrane structure capable of prolonging service life, which comprises a sheet main body, the sheet main body comprises a connecting area connected with the periphery of an explosion-proof hole and an explosion-proof area used for breathing deformation to play an explosion-proof role, and the periphery of the explosion-proof area is connected with the connecting area in a surrounding manner. The two sides of the explosion-proof area are connected with the connecting area through reinforcing ribs, a first explosion-proof dent is arranged at the remaining connecting position of the connecting area and the explosion-proof area, a second explosion-proof dent communicated with the first explosion-proof dent is arranged in the middle of the explosion-proof area, and reinforcing ribs are arranged on the portions, on the two sides of the second explosion-proof dent, of the explosion-proof area. By means of the mode, under the action of the reinforcing ribs, breathing deformation is reduced, the service life is prolonged, and complete opening during blasting is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery explosion-proof technology, and in particular to an explosion-proof membrane structure that improves service life. Background Technology

[0002] Battery explosion-proof film is a safety device specifically designed for batteries. When the internal pressure of the battery rises abnormally, the explosion-proof film releases the internal pressure of the battery through deformation and rupture, releasing gas and heat to the outside of the battery. This prevents excessive accumulation of pressure and temperature inside the battery, which could lead to an explosion, thus protecting the safety of the battery and the user. Battery explosion-proof film has been widely used in modern battery equipment.

[0003] Chinese patent CN202311102050.6 discloses a battery explosion-proof film. In the process of using this cross-explosion explosion-proof film, explosion is equivalent to opening all four grooves at the same time. There is a probability that one or two grooves will not be opened.

[0004] In addition, the pressure inside the battery changes during charging and discharging. Because the explosion-proof film is thin, it will fluctuate up and down. In small battery cells, it can still be used because the air pressure is low. However, in large battery cells, the air pressure of the cell increases, which can easily cause the explosion-proof film to deform severely, affecting its burst pressure value and service life.

[0005] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design an explosion-proof membrane structure that can improve service life. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide an explosion-proof membrane structure that improves service life. With the reinforcement of the reinforcing ribs, it reduces breathing deformation, extends service life, and facilitates complete opening during explosion.

[0007] To solve the above-mentioned technical problems, the present invention provides a technical solution for an explosion-proof membrane structure that improves service life. The structure includes a thin sheet body, comprising a connecting area connected to the outer periphery of the explosion-proof hole and an explosion-proof area for breathable deformation to provide explosion protection. The explosion-proof area is surrounded by the connecting area. The explosion-proof area is connected to the connecting area on both sides by reinforcing ribs. The reinforcing ribs prevent the explosion-proof area from detaching entirely from the connecting area after a burst. A first explosion-proof indentation is provided at the remaining connection point between the connecting area and the explosion-proof area. A second burst indentation communicating with the first explosion-proof indentation is provided in the center of the explosion-proof area. Reinforcing ribs are provided on both sides of the explosion-proof area of ​​the second burst indentation. Since the pressure inside the battery changes, the thin explosion-proof membrane will experience vertical fluctuations. These reinforcing ribs can compensate for its deformation and extend the lifespan of the explosion-proof membrane on the battery.

[0008] Preferably, the two reinforcing ribs are arranged according to the outline of the sheet body, and the two opposite reinforcing ribs are separated by the second burst indentation and are not connected.

[0009] Preferably, the reinforcing ribs and supplementary reinforcing ribs are protrusions that protrude relative to the outer side of the sheet body.

[0010] Preferably, the first explosion-proof indentation and the second blasting indentation are thinned, and the cross-section of the explosion-proof indentation is a rectangular groove located on the inner side of the sheet body and a V-shaped groove located on the outer side of the sheet body.

[0011] Preferably, the direction of the reinforcing rib is set along the length direction of the sheet body.

[0012] Preferably, the second blasting indentation is parallel to the two reinforcing ribs.

[0013] Preferably, the sheet body is integrally stamped from a metal sheet.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The reinforcing ribs prevent the explosion-proof area from detaching entirely from the connection area after an explosion.

[0016] By reinforcing the ribs, the abnormal rupture of the explosion-proof membrane caused by breathing deformation during battery charging and discharging can be reduced, thereby increasing the service life of the explosion-proof membrane while keeping the rupture pressure value constant.

[0017] The first explosion-proof dent and the second blasting dent are thinned and intersected, resulting in a large opening area and making it easier to open completely. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an explosion-proof membrane structure designed to improve service life.

[0019] Figure 2 This is a top view of an explosion-proof membrane structure designed to improve service life.

[0020] Figure 3 This is a cross-sectional view of an explosion-proof membrane structure designed to improve service life.

[0021] Figure 4 This is a diagram illustrating the usage status of an explosion-proof membrane structure designed to extend its service life.

[0022] Among them, 1. Thin sheet body, 11. Connecting area, 12. Explosion-proof area; 2. Reinforcing rib; 3. First explosion-proof dent; 4. Second explosion dent; 5. Reinforcing rib, 01. Rectangular groove, 02. V-shaped groove. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0024] Please see Figures 1 to 4 The embodiments of this utility model include:

[0025] An explosion-proof membrane structure with extended service life includes a thin sheet body 1 integrally stamped from a metal sheet. The thin sheet body 1 includes a connecting region 11 connected to the outer periphery of an explosion-proof hole and an explosion-proof region 12 for breathable deformation to provide explosion protection. The explosion-proof region 12 is surrounded by the connecting region 11. The two sides of the explosion-proof region 12 are connected to the connecting region 11 by reinforcing ribs 2. The direction of the reinforcing ribs 2 is along the length direction of the thin sheet body 1. The reinforcing ribs 2 prevent the explosion-proof region 12 from being completely destroyed after an explosion. The body is detached from the connection area 11. The remaining connection between the connection area 11 and the explosion-proof area 12 is provided with a first explosion-proof indentation 3. A second explosion indentation 4 communicating with the first explosion-proof indentation 3 is provided in the middle of the explosion-proof area 12. The second explosion indentation 4 is parallel to the two reinforcing ribs 2. Reinforcing ribs 5 are provided on both sides of the explosion-proof area 12. The pressure inside the battery will change. Because the explosion-proof film is thin, it will have up and down breathing fluctuations. The addition of these reinforcing ribs 5 can compensate for its deformation and extend the life of the explosion-proof film on the battery.

[0026] Two reinforcing ribs 5 are arranged according to the outline of the sheet body 1. The two opposite reinforcing ribs 5 are separated by the second burst indentation 4 and are not connected. The reinforcing ribs 2 and 5 are protrusions, protruding relative to the outer side of the sheet body 1.

[0027] The first explosion-proof dent 3 and the second blasting dent 4 are designed to reduce thickness. The cross-section of the explosion-proof dent is a rectangular groove 01 located inside the sheet body 1 and a V-shaped groove 02 located outside the sheet body 1.

[0028] This utility model discloses an explosion-proof membrane structure that improves service life. With the reinforcement of reinforcing ribs, it reduces breathing deformation, extends service life, and facilitates complete opening during explosion.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An explosion-proof membrane structure with improved service life, characterized in that: The device includes a thin sheet body (1), which includes a connecting area (11) connected to the outer periphery of the explosion-proof hole and an explosion-proof area (12) for breathing deformation to provide explosion protection. The explosion-proof area (12) is surrounded by the connecting area (11). The two sides of the explosion-proof area (12) are connected to the connecting area (11) by reinforcing ribs (2). The remaining connection between the connecting area (11) and the explosion-proof area (12) is provided with a first explosion-proof indentation (3). The middle of the explosion-proof area (12) is provided with a second blasting indentation (4) communicating with the first explosion-proof indentation (3). The explosion-proof areas (12) on both sides of the second blasting indentation (4) are provided with reinforcing ribs (5).

2. The explosion-proof membrane structure for improving service life according to claim 1, characterized in that: Two reinforcing ribs (5) are set according to the outline of the sheet body (1). The two opposite reinforcing ribs (5) are separated by the second burst indentation (4) and are not connected.

3. The explosion-proof membrane structure for improving service life according to claim 1, characterized in that: The reinforcing rib (2) and the supplementary reinforcing rib (5) are protrusions that protrude from the outside of the sheet body (1).

4. The explosion-proof membrane structure for improving service life according to claim 1, characterized in that: The first explosion-proof dent (3) and the second blasting dent (4) are thinned. The explosion-proof dent cross section is a rectangular groove (01) located inside the sheet body (1) and a V-shaped groove (02) located outside the sheet body (1).

5. The explosion-proof membrane structure for improving service life according to claim 1, characterized in that: The direction of the reinforcing rib (2) is set according to the length direction of the sheet body (1).

6. The explosion-proof membrane structure for improving service life according to claim 5, characterized in that: The second blasting indentation (4) is parallel to the two reinforcing ribs (2).

7. The explosion-proof membrane structure for improving service life according to claim 1, characterized in that: The thin sheet body (1) is integrally stamped from a metal sheet.

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