Battery explosion-proof valve, battery cover plate and battery

Abstract

The invention provides a battery explosion-proof valve, a battery cover plate and a battery, and relates to the technical field of batteries. The battery explosion-proof valve provided by the invention is arranged on a battery cover plate and comprises a body, a pressure relief groove, a detection groove and a first reinforcing rib, the pressure relief groove, the detection groove and the first reinforcing rib are all arranged on the body, the explosion-proof valve is constructed to perform explosion pressure relief along the pressure relief groove, and the pressure relief groove surrounds the periphery of the detection groove and the first reinforcing rib. A detection area is defined by the first reinforcing rib and the pressure relief groove, the detection groove is located in the detection area, and the depth of the pressure relief groove is 0.05 mm-0. 08mm deeper than that of the detection groove. The invention provides a battery explosion-proof valve, a battery cover plate and a battery. The depth of a pressure relief groove of the explosion-proof valve can be traced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery explosion-proof valve, a battery cover plate and a battery. Background Art

[0002] At present, battery explosion-proof valves are generally provided with a circle of closed pressure relief grooves. When the internal air pressure of the battery reaches a certain pressure, the explosion-proof valve can burst from the pressure relief groove to release the pressure to ensure the safety of the battery. However, after the existing explosion-proof valve bursts at the pressure relief groove, the pressure relief groove is completely destroyed, and it is impossible to measure whether the depth of the pressure relief groove of the explosion-proof valve is within the required range, resulting in the inability to determine whether the explosion-proof valve bursts within the required pressure range after the explosion. Summary of the invention

[0003] In order to solve at least one of the problems mentioned in the background technology, the present invention provides a battery explosion-proof valve, a battery cover plate and a battery, which can trace the depth of the pressure relief groove of the explosion-proof valve.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides a battery explosion-proof valve, which is arranged on a battery cover, and includes a main body, a pressure relief groove, a detection groove and a first reinforcing rib. The pressure relief groove, the detection groove and the first reinforcing rib are all arranged on the main body. The explosion-proof valve is constructed to explode and relieve pressure along the pressure relief groove. The pressure relief groove is arranged around the detection groove and the first reinforcing rib, and a detection area is enclosed between the first reinforcing rib and the pressure relief groove. The detection groove is located in the detection area, and the depth of the pressure relief groove is 0.05mm-0.08mm deeper than the depth of the detection groove.

[0006] As an optional implementation, the distance between the detection groove and the pressure relief groove is greater than 3.5 mm.

[0007] As an optional implementation, the shape of the detection slot is bar-shaped, arc-shaped, circular or elliptical.

[0008] As an optional implementation, the pressure relief groove includes a first straight side, the detection groove is in a strip shape, and the detection groove is parallel to the first straight side.

[0009] As an optional implementation, the cross section of the detection slot is arc-shaped, triangular or square.

[0010] As an optional implementation, it further includes a second reinforcing rib, the second reinforcing rib is located in the detection area, and the detection groove is located between the first reinforcing rib and the second reinforcing rib.

[0011] As an optional implementation, the second reinforcement rib has a circular shape and is arranged around the periphery of the detection slot.

[0012] As an optional implementation, a plurality of detection areas are enclosed between the first reinforcing rib and the pressure relief groove, each detection area is provided with a detection groove, and at least two of the detection grooves extend in different directions.

[0013] In a second aspect, the present invention further provides a battery cover, comprising a pole through hole, a liquid injection hole, and the battery explosion-proof valve in the first aspect.

[0014] In a third aspect, the present invention further provides a battery, comprising a shell, a battery cell and the battery cover plate in the second aspect, wherein the shell is wrapped around the battery cell, an end of the shell has an opening, and the cover plate covers the opening.

[0015] The battery explosion-proof valve provided by the present invention is arranged on the battery cover plate, comprises a body, a pressure relief groove, a detection groove and a first reinforcing rib, the pressure relief groove, the detection groove and the first reinforcing rib are all arranged on the body, the explosion-proof valve is constructed to explode and release pressure along the pressure relief groove, the pressure relief groove is arranged around the detection groove and the first reinforcing rib, and a detection area is enclosed between the first reinforcing rib and the pressure relief groove, the detection groove is located in the detection area, and the depth of the pressure relief groove is 0.05mm-0.08mm deeper than the depth of the detection groove. The battery explosion-proof valve provided by the present invention is provided with a detection groove and a first reinforcing rib on the inner side of the pressure relief groove, and the depth of the pressure relief groove is 0.05mm-0.08mm deeper than the depth of the detection groove. Therefore, after the explosion-proof valve explodes and releases pressure along the pressure relief groove, the depth of the pressure relief groove of the explosion-proof valve can be inferred by measuring the depth of the detection groove, so as to judge whether the depth of the pressure relief groove of the explosion-proof valve is within the required range, and determine whether the explosion-proof valve explodes within the required pressure range, so as to timely adjust the pressure requirements of the explosion-proof valve and the production process of the explosion-proof valve. Among them, the first reinforcing rib can reinforce and support the explosion-proof valve body to a certain extent, so as to avoid excessive deformation of the explosion-proof valve after the explosion, thereby completely destroying the detection groove structure, resulting in difficulty in measuring the depth of the detection groove later. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a first structure of a battery explosion-proof valve on a battery cover provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Side view of

[0020] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0021] Figure 5 A schematic diagram of a second structure of a battery explosion-proof valve on a battery cover provided by an embodiment of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0023] Figure 7 A schematic diagram of a third structure of a battery explosion-proof valve provided by an embodiment of the present invention on a battery cover plate;

[0024] Figure 8 for Figure 7 The enlarged view of point D in the middle;

[0025] Fig. 9 A schematic diagram of a fourth structure of a battery explosion-proof valve provided by an embodiment of the present invention on a battery cover plate;

[0026] Fig.10 for Fig. 9 Enlarged view of point E in the middle.

[0027] Description of reference numerals:

[0028] 100-battery explosion-proof valve;

[0029] 110-Ontology;

[0030] 111-Detection area;

[0031] 120-pressure relief tank;

[0032] 121-first straight edge;

[0033] 130- detection tank;

[0034] 140-first reinforcement rib;

[0035] 150-second reinforcement rib;

[0036] 200-battery cover;

[0037] 210-pole through hole;

[0038] 220-Filling hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0044] The existing battery explosion-proof valve 100 generally has a circle of closed pressure relief grooves 120. When the internal air pressure of the battery reaches a certain pressure, the explosion-proof valve can burst from the pressure relief groove 120 to release pressure to ensure the safety of the battery. However, after the explosion-proof valve bursts at the pressure relief groove 120, since the pressure relief groove 120 is completely destroyed, it is impossible to measure whether the depth of the pressure relief groove 120 of the explosion-proof valve is within the required range, resulting in the inability to determine whether the explosion-proof valve bursts within the required pressure range after the explosion.

[0045] In view of this, the present invention provides a battery explosion-proof valve 100, which is arranged on a battery cover 200, including a main body 110, a pressure relief groove 120, a detection groove 130 and a first reinforcing rib 140, wherein the pressure relief groove 120, the detection groove 130 and the first reinforcing rib 140 are all arranged on the main body 110, and the explosion-proof valve is constructed to explode and release pressure along the pressure relief groove 120, the pressure relief groove 120 is arranged around the periphery of the detection groove 130 and the first reinforcing rib 140, and a detection area 111 is enclosed between the first reinforcing rib 140 and the pressure relief groove 120, the detection groove 130 is located in the detection area 111, and the depth of the pressure relief groove 120 is 0.05mm-0.08mm deeper than the depth of the detection groove 130. After the explosion-proof valve explodes and releases pressure along the pressure relief groove 120, the depth of the explosion-proof valve pressure relief groove 120 can be inferred by measuring the depth of the detection groove 130 to determine whether the depth of the explosion-proof valve pressure relief groove 120 is within the required range, and to determine whether the explosion-proof valve explodes within the required pressure range, so as to timely adjust the pressure requirements of the explosion-proof valve and the production process of the explosion-proof valve. The first reinforcing rib 140 can reinforce and support the explosion-proof valve body 110 to avoid excessive deformation of the explosion-proof valve after the explosion, thereby completely destroying the structure of the detection groove 130, resulting in difficulty in measuring the depth of the detection groove 130 later.

[0046] Figure 1 A schematic diagram of a first structure of a battery explosion-proof valve 100 provided in an embodiment of the present invention on a battery cover plate 200; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 Side view of Figure 4 for Figure 3 The enlarged view of point B in the middle; Figure 5 A schematic diagram of a second structure of a battery explosion-proof valve 100 provided in an embodiment of the present invention on a battery cover plate 200; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 A schematic diagram of a third structure of a battery explosion-proof valve 100 provided in an embodiment of the present invention on a battery cover plate 200; Figure 8 for Figure 7 The enlarged view of point D in the middle; Fig. 9 A schematic diagram of a fourth structure of a battery explosion-proof valve 100 provided in an embodiment of the present invention on a battery cover plate 200; Fig.10 for Fig. 9 Enlarged view of point E in the middle.

[0047] You can refer to Figures 1 to 10The embodiment of the present invention provides a battery explosion-proof valve 100, which is arranged on a battery cover 200, including a body 110, a pressure relief groove 120, a detection groove 130 and a first reinforcing rib 140. The pressure relief groove 120, the detection groove 130 and the first reinforcing rib 140 are all arranged on the body 110. The explosion-proof valve is constructed to explode and release pressure along the pressure relief groove 120. The pressure relief groove 120 is arranged around the periphery of the detection groove 130 and the first reinforcing rib 140, and a detection area 111 is enclosed between the first reinforcing rib 140 and the pressure relief groove 120. The detection groove 130 is located in the detection area 111. The depth of the pressure relief groove 120 is 0.05mm-0.08mm deeper than the depth of the detection groove 130.

[0048] The depth of the pressure relief groove 120 is made 0.05mm-0.08mm deeper than the depth of the detection groove 130, which can prevent the detection groove 130 from being too deep, thereby causing the explosion-proof valve to burst and release pressure from the detection groove 130, and can also prevent the detection groove 130 from being too shallow, resulting in inconvenience in subsequent depth detection. In one embodiment, the depth of the pressure relief groove 120 can be made 0.05mm deeper than the depth of the detection groove 130. When the explosion-proof valve bursts, the depth of the detection groove 130 can be measured first, and then the depth of the detection groove 130 detected and 0.05mm are added to obtain the depth of the pressure relief groove 120 of the explosion-proof valve.

[0049] The width of the detection groove 130 can be made smaller than the width of the pressure relief groove 120 , thereby reducing the slight weakening of the explosion-proof valve body 110 structure caused by the detection groove 130 and further avoiding the risk of the explosion-proof valve exploding from the detection groove 130 .

[0050] The battery explosion-proof valve 100 provided in the embodiment of the present invention is provided with a detection groove 130 and a first reinforcing rib 140 on the inner side of the pressure relief groove 120, and the depth of the pressure relief groove 120 is 0.05mm-0.08mm deeper than the depth of the detection groove 130, so that after the explosion-proof valve explodes and releases pressure along the pressure relief groove 120, the depth of the explosion-proof valve pressure relief groove 120 can be inferred by measuring the depth of the detection groove 130, so as to judge whether the depth of the explosion-proof valve pressure relief groove 120 is within the required range, and determine whether the explosion-proof valve explodes within the required pressure range, so as to timely adjust the pressure requirements of the explosion-proof valve and the production process of the explosion-proof valve, wherein the first reinforcing rib 140 provided can reinforce and support the explosion-proof valve body 110 to a certain extent, so as to avoid excessive deformation of the explosion-proof valve after the explosion, thereby completely destroying the structure of the detection groove 130, resulting in difficulty in measuring the depth of the detection groove 130 later.

[0051] In the above embodiment, the distance between the detection groove 130 and the pressure relief groove 120 can be greater than 3.5 mm. When the distance between the detection groove 130 and the pressure relief groove 120 is less than 3.5 mm, when the explosion-proof valve explodes and releases pressure from the pressure relief groove 120, the explosion-proof valve body 110 at the detection groove 130 is easily deformed too much, making it difficult to measure the depth of the detection groove 130 later.

[0052] In the above embodiment, the shape of the detection groove 130 can be a bar, an arc, a circle or an ellipse. Among them, the detection groove 130 is designed to be in a bar shape, which can be easily processed. The arc-shaped, circular or elliptical detection groove 130 can avoid the stress concentration point at the detection groove 130 as much as possible, reduce the weakening of the structural strength of the explosion-proof valve body 110 by the detection groove 130 itself, and reduce the risk of the explosion-proof valve exploding from the detection groove 130. Of course, the detection groove 130 can be designed in other shapes, and no specific restrictions are made here. It can be understood that the shape of the detection groove 130 here is as follows Figure 1 The appearance of the detection slot 130 in a top view is shown in FIG.

[0053] like Figure 1 and Figure 2 As shown, in the above embodiment, the pressure relief groove 120 may include a first straight edge 121, the detection groove 130 has a strip shape, and the detection groove 130 is parallel to the first straight edge 121. It can be understood that when the explosion-proof valve explodes along the first straight edge 121 of the pressure relief groove 120, the extension direction of the deformation crease on the explosion-proof valve after the explosion is likely to be consistent with the extension direction of the first straight edge 121. Therefore, if the detection groove 130 is parallel to the first straight edge 121, it can be avoided that the crease passes through the detection groove 130, thereby destroying the structure of the detection groove 130.

[0054] In the above embodiment, the cross section of the detection groove 130 can be made into an arc shape, a triangle shape or a square shape. Among them, making the cross section of the detection groove 130 into an arc shape can reduce the stress concentration at the detection groove 130, and further reduce the risk of the explosion-proof valve bursting from the detection groove 130. Making the cross section of the detection groove 130 into a square or a triangle shape can facilitate the subsequent depth of the detection groove 130. Of course, the cross section of the detection groove 130 can also be designed in other shapes, which is not specifically limited here. Specifically, Figure 4 As shown, the cross-sectional shape of the detection groove 130 can be an isosceles triangle, with the top of the triangle facing downward, and the height of the triangle is the depth of the detection groove 130, so as to facilitate testing the depth of the detection groove 130.

[0055] like Figure 5 and Figure 6As shown, in the above embodiment, a second reinforcing rib 150 may also be included, and the second reinforcing rib 150 is located in the detection area 111, and the detection groove 130 is located between the first reinforcing rib 140 and the second reinforcing rib 150. By reinforcing and supporting the areas on both sides of the detection groove 130 through the first reinforcing rib 140 and the second reinforcing rib 150, it is possible to prevent the area where the detection groove 130 is located from being deformed together after the explosion-proof valve explodes, which increases the difficulty of subsequent detection of the depth of the detection groove 130.

[0056] like Figure 7 and Figure 8 As shown, in the above embodiment, the second reinforcing rib 150 may be circular in shape, and the second reinforcing rib 150 is arranged around the periphery of the detection slot 130. The second reinforcing rib 150 completely surrounds the detection slot 130, and the area around the detection slot 130 can be reinforced in all directions, further preventing the explosion-proof valve from deforming along with the detection slot 130 after the explosion-proof valve is exploded. The circular second reinforcing rib 150 has a more uniform structure, and can reinforce the explosion-proof valve body 110 in the peripheral area of ​​the detection slot 130 more evenly, preventing the explosion-proof valve from deforming along with the detection slot 130 from deforming along with the explosion-proof valve from all directions. In addition, the shape of the second reinforcing rib 150 can also be designed to be other shapes, such as square, polygonal, elliptical, etc.

[0057] like Fig. 9 and Fig.10 As shown, in the above embodiment, a plurality of detection areas 111 can be enclosed between the first reinforcing rib 140 and the pressure relief groove 120, each detection area 111 is provided with a detection groove 130, and at least two of the detection grooves 130 extend in different directions. By providing a plurality of detection grooves 130, even if a portion of the detection grooves 130 are damaged after the explosion-proof valve explodes, the remaining undamaged detection grooves 130 can still be used as detection positions to detect their depths, thereby improving the overall reliability of the detection grooves 130. Among them, by making at least two of the detection grooves 130 extend in different directions, it is possible to avoid that all the detection grooves 130 extend in the same direction and rupture together with the explosion-proof valve, thereby improving the "survival rate" of the detection grooves 130.

[0058] In addition, an embodiment of the present invention further provides a battery cover 200, including a pole through hole 210, a liquid injection hole 220 and the battery explosion-proof valve 100 in the above embodiment, the battery explosion-proof valve 100 includes a body 110, a pressure relief groove 120, a detection groove 130 and a first reinforcing rib 140, the pressure relief groove 120, the detection groove 130 and the first reinforcing rib 140 are all arranged on the body 110, the explosion-proof valve is constructed to explode and relieve pressure along the pressure relief groove 120, the pressure relief groove 120 is surrounded by the outer periphery of the detection groove 130 and the first reinforcing rib 140, and a detection area 111 is surrounded by the first reinforcing rib 140 and the pressure relief groove 120, the detection groove 130 is located in the detection area 111, and the depth of the pressure relief groove 120 is 0.05mm-0.08mm deeper than the depth of the detection groove 130. After the explosion-proof valve explodes and releases pressure along the pressure relief groove 120, the depth of the explosion-proof valve pressure relief groove 120 can be inferred by measuring the depth of the detection groove 130 to determine whether the depth of the explosion-proof valve pressure relief groove 120 is within the required range, and to determine whether the explosion-proof valve explodes within the required pressure range, thereby timely adjusting the pressure requirements of the explosion-proof valve and the production process of the explosion-proof valve, thereby improving the reliability of the battery cover 200.

[0059] Among them, the function of the pole through hole 210 is mainly to serve as a channel for the pole to penetrate into the battery and electrically connect to the battery tab, thereby leading the battery's electrical properties from the inside of the battery to the outside of the battery; the main function of the injection hole 220 is to inject electrolyte into the battery to ensure that the battery has sufficient ion migration channels during the charge and discharge process, thereby achieving normal operation of the battery.

[0060] In addition, an embodiment of the present invention further provides a battery, including a shell, a battery cell and the battery cover 200 in the above embodiment, wherein the shell is wrapped around the battery cell, an end of the shell has an opening, and the cover covers the opening. The battery is provided with a detection groove 130 and a first reinforcing rib 140 on the inner side of the pressure relief groove 120 on the explosion-proof valve, and the depth of the pressure relief groove 120 is made 0.05mm-0.08mm deeper than the depth of the detection groove 130. Therefore, after the explosion-proof valve explodes along the pressure relief groove 120 to release pressure, the depth of the explosion-proof valve pressure relief groove 120 can be inferred by measuring the depth of the detection groove 130 to determine whether the depth of the explosion-proof valve pressure relief groove 120 is within the required range, and to determine whether the explosion-proof valve explodes within the required pressure range, so as to timely adjust the pressure requirements of the explosion-proof valve and the production process of the explosion-proof valve. The first reinforcing rib 140 can reinforce and support the explosion-proof valve body 110 to avoid excessive deformation of the explosion-proof valve after the explosion, thereby completely destroying the structure of the detection groove 130, making it difficult to measure the depth of the detection groove 130 later, thereby improving the reliability and safety of the battery.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery explosion-proof valve, characterized in that: It is arranged on the battery cover, including a main body, a pressure relief groove, a detection groove and a first reinforcing rib, the pressure relief groove, the detection groove and the first reinforcing rib are all arranged on the main body, the explosion-proof valve is constructed to explode and relieve pressure along the pressure relief groove, the pressure relief groove is arranged around the detection groove and the first reinforcing rib, and a detection area is enclosed between the first reinforcing rib and the pressure relief groove, the detection groove is located in the detection area, and the depth of the pressure relief groove is 0.05mm-0.08mm deeper than the depth of the detection groove.

2. The battery explosion-proof valve according to claim 1, characterized in that: The distance between the detection groove and the pressure relief groove is greater than 3.5 mm.

3. The battery explosion-proof valve according to claim 2, characterized in that: The shape of the detection slot is bar-shaped, arc-shaped, circular or elliptical.

4. The battery explosion-proof valve according to claim 3, characterized in that: The pressure relief groove comprises a first straight side, the detection groove has a strip shape, and the detection groove is parallel to the first straight side.

5. The battery explosion-proof valve according to claim 4, characterized in that: The cross section of the detection slot is arc-shaped, triangular or square.

6. The battery explosion-proof valve according to any one of claims 1 to 5, characterized in that: It also includes a second reinforcing rib, wherein the second reinforcing rib is located in the detection area, and the detection groove is located between the first reinforcing rib and the second reinforcing rib.

7. The battery explosion-proof valve according to claim 6, characterized in that: The second reinforcing rib has a circular shape, and is disposed around the periphery of the detection slot.

8. The battery explosion-proof valve according to claim 7, characterized in that: A plurality of detection areas are defined between the first reinforcing rib and the pressure relief groove, each of the detection areas is provided with a detection groove, and at least two of the detection grooves extend in different directions.

9. A battery cover, characterized in that: The battery comprises a pole through hole, a liquid injection hole and a battery explosion-proof valve as described in any one of claims 1 to 8.

10. A battery, characterized in that: The invention comprises a shell, a battery cell and the battery cover plate as claimed in claim 9, wherein the shell is wrapped around the battery cell, an end of the shell has an opening, and the cover plate covers the opening.

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