Battery explosion-proof valve

Abstract

The utility model provides a battery explosion-proof valve, which comprises a main cover plate and an explosion-proof structure, the main cover plate is a metal sheet body, the explosion-proof structure is concavely formed on the main cover plate, the explosion-proof structure is integrally formed, and an outer edge notch groove is pressed on the explosion-proof structure to separate a fixing part and an opening part; the fixing part is arranged on the periphery of the opening part in a surrounding mode. Two secant lines are pressed on the opening part and radially intersect at a central point of the anti-explosion sheet to form a cross notch groove; through the structure of the outer edge notch groove and the cross notch groove as well as the explosion-proof structure which is integrally formed, the stability of the battery explosion-proof valve when the battery explosion-proof valve is broken and the use safety of the battery are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of explosion-proof valve, specifically to a kind of battery explosion-proof valve with battery explosion-proof function. BACKGROUND

[0002] Currently applied in battery field, for safety consideration, a battery explosion-proof valve is usually installed on battery, and the explosion-proof sheet on the battery explosion-proof valve can include various shapes, such as circular, rectangular, etc.

[0003] However, various shapes of explosion-proof sheet are prone to direct rupture and splashing due to large and unstable internal pressure of the battery, endangering the safety of users; or further increasing the rupture threshold of the explosion-proof sheet to reduce the rupture degree of the explosion-proof sheet also increases the use risk of the battery.

[0004] Therefore, it is an urgent need to provide an explosion-proof structure with rupture stability and battery safety in the related field. SUMMARY

[0005] In order to develop an explosion-proof sheet with rupture stability and battery safety, the utility model provides a battery explosion-proof valve, which comprises a main cover plate and an explosion-proof structure, the main cover plate is a metal sheet body, the explosion-proof structure is recessed in the main cover plate, and the explosion-proof structure comprises a groove, the groove thickness is less than the explosion-proof sheet.

[0006] The explosion-proof structure is integrally formed and is pressed to separate a fixed part and an opening part by an outer groove, and the fixed part is arranged around the outer periphery of the opening part.

[0007] The opening part is divided into four petals by the cross groove.

[0008] The thinnest part of each petal is adjacent to the center point.

[0009] Further, the thickest part of each petal is a convex part, which gradually thickens radially from the center point to the fixed part.

[0010] The maximum diameter length of the radial extension of the cross groove is less than the diameter length of the opening part.

[0011] Preferably, the straight line distance between the convex part and the center point is between 1:5 and 3:1 compared with the straight line distance between the convex part and the outer groove.

[0012] Preferably, the groove depth of the cross groove is deeper than the groove depth of the outer groove, and the groove width of the cross groove is wider than the groove width of the outer groove.

[0013] The angle formed by the intersection of the two secant lines at the center point is between 20° and 160°.

[0014] Preferably, the explosion-proof structure is a circular groove; the outer edge groove is a circular groove.

[0015] As can be seen from the above description, this utility model has the following advantages:

[0016] 1. The depth of one groove of the cross-shaped groove is greater than the depth of the groove of the outer edge groove, the width of one groove of the cross-shaped groove is greater than the width of the groove of the outer edge groove, and the maximum diameter length of the cross-shaped groove extending radially is less than the diameter length of the opening portion, so that when the internal pressure of the battery is released, gas or liquid is preferentially released by breaking along the cross-shaped groove, thereby improving the safety of the battery.

[0017] 2. This protrusion also further prevents the outer edge groove from cracking before the cross groove.

[0018] 3. The explosion-proof structure 12 is integrally formed, which simplifies the process compared to the traditional process of welding an explosion-proof sheet to the main cover plate 10 and reduces the risk of the explosion-proof sheet not being fully bonded to the main cover plate 10 due to operator carelessness during the welding process, thus affecting the safety of the battery. Attached Figure Description

[0019] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 This is a top view of the explosion-proof structure according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of the explosion-proof structure according to an embodiment of the present invention.

[0022] Symbol explanation:

[0023] 10 main cover plates

[0024] 11 positive and negative terminals

[0025] 12 Explosion-proof structure

[0026] 121 Fixing Part

[0027] 122 Opening Department

[0028] 1221 Cross Groove

[0029] 1222 convex part

[0030] 123 outer edge groove

[0031] 124 center point Detailed Implementation

[0032] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] The utility model will be described in further detail below in combination with the drawings:

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 , the utility model provides a battery explosion-proof valve, it contains a main cover plate 10, the main cover plate 10 includes the sheet body made of metal material, to fix the battery explosion-proof valve in a battery.

[0035] Wherein, the main cover plate 10 includes two positive and negative poles 11 arranged on both sides of the main cover plate 10 and a blast structure 12 recessed in the main cover plate 10, the blast structure 12 is arranged on the main cover plate 10 by stamping integral forming, and breaks to release the internal pressure of the battery when the internal pressure of the battery reaches a threshold, to avoid battery explosion.

[0036] Preferably, the blast structure 12 is located between the two positive and negative poles 11, more preferably, the blast structure 12 is located at the center of the main cover plate 10, and the blast structure 12 is the same distance from the two positive and negative poles 11.

[0037] The blast structure 12 further compresses a outer edge groove 123 to separate a fixed part 121 and an opening part 122, the fixed part 121 is arranged around the outer periphery of the opening part 122; the opening part 122 is used to release the internal gas or liquid of the battery when the blast structure 12 breaks.

[0038] Preferably, the blast structure 12 is a circular groove, the outer edge groove 123 is a circular groove, and a center point 124 of the blast structure 12 is the center of the circular groove, which is arranged on one side of the blast structure 12, so that the fixed part 121 is arranged in a circular ring around the outer periphery of the opening part 122.

[0039] Please refer to Figure 2 , two cutting lines are arranged on the opening part 122, which radially intersect at the center point 124 to form a cross groove 1221, and the opening part 122 is divided into four petals by the cross groove 1221.

[0040] Wherein, each of the segments has a thickness that is not uniform, and the thinnest part of each segment is adjacent to the center point 124 and gradually thickens in the direction of the fixed portion 121 to form a convex portion 1222, and the convex portion 1222 is the thickest part of each segment.

[0041] Wherein, the included angle formed by the intersection of the two bisectors at the center point 124 can be between 20° and 160°.

[0042] Preferably, the straight-line distance between the convex portion 1222 and the center point 124 is between 1:5 and 3:1 of the straight-line distance between the convex portion 1222 and the outer edge groove 123.

[0043] Preferably, the maximum diameter length of the cross-shaped groove 1221 extending radially from the center of the opening portion 122 is less than the diameter length of the opening portion 122. That is, the cross-shaped groove 1221 is not connected to the outer edge groove 123.

[0044] Preferably, the groove depth of the cross-shaped groove 1221 is deeper than the groove depth of the outer edge groove 123, and the groove width of the cross-shaped groove 1221 is wider than the groove width of the outer edge groove 123.

[0045] Preferably, the included angle is 90°, so that the explosion-proof structure 12 can avoid reducing the safety of the battery due to uneven segment shapes.

[0046] In summary of the above embodiments, the battery explosion-proof valve provided by the present application can have the following effects:

[0047] 1. The groove depth of the cross-shaped groove 1221 is deeper than the groove depth of the outer edge groove 123, the groove width of the cross-shaped groove 1221 is wider than the groove width of the outer edge groove 123, and the maximum diameter length of the cross-shaped groove 1221 extending radially from the center of the opening portion 122 is less than the diameter length of the opening portion 122, so that when releasing the internal pressure of the battery, the cross-shaped groove 1221 is preferentially broken to release gas or liquid, thereby improving the safety of the battery.

[0048] 2. The convex portion 1222 can further prevent the outer edge groove 123 from preferentially breaking than the cross-shaped groove 1221.

[0049] 3. The explosion-proof structure 12 is integrally formed, which simplifies the process compared to the traditional process of welding an explosion-proof sheet to the main cover plate 10 and reduces the risk of incomplete combination of the explosion-proof sheet and the main cover plate 10 due to operator carelessness during the welding process, thereby affecting the safety of the battery.

[0050] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery explosion-proof valve, comprising a main cover plate and an explosion-proof structure, the main cover plate being a metal sheet, the explosion-proof structure being recessed into the main cover plate, and the explosion-proof structure including an opening portion, the opening portion being divided into four lobes by a cross-shaped groove, wherein... The thinnest part of each lobe is near a center point, and the thickest part of each lobe is a convex portion that gradually thickens radially away from the center point.

2. The battery explosion-proof valve as claimed in claim 1, wherein the explosion-proof structure is integrally formed and has an outer edge groove pressed in to separate a fixing part and the opening part, the fixing part being disposed around the outer periphery of the opening part.

3. The battery explosion-proof valve as claimed in claim 1, wherein the maximum diameter length of the radially extending cross groove is less than the diameter length of the opening portion.

4. The battery explosion-proof valve as described in claim 1, wherein the straight-line distance between the protrusion and the center point is between 1:5 and 3:1 compared to the straight-line distance between the protrusion and the outer edge groove.

5. The battery explosion-proof valve as described in claim 1, wherein the groove depth of the cross groove is deeper than the groove depth of the outer edge groove, and the groove width of the cross groove is wider than the groove width of the outer edge groove.

6. The battery explosion-proof valve as described in claim 1, wherein the included angle formed by the intersection of the two secant lines at the center point is between 20° and 160°.

7. The battery explosion-proof valve as described in claim 1, wherein the explosion-proof structure is a circular groove; and the outer edge groove is a circular groove.

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