Anti-explosion valve, battery cover plate and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses an anti-explosion valve, a battery cover plate and a battery, the anti-explosion valve comprises an action part and a separation part, one side of the action part is provided with a nick, the action part is provided with a burst area, and the outer edge of the burst area is overlapped with the nick in the thickness direction of the action part; the separating part is connected with the acting part and arranged on at least one side of the acting part. Thus, when a plurality of anti-explosion valves are stacked, as the positions, where the explosion areas are arranged, of the adjacent action parts are separated by the separation parts, the conditions of oxidation, blackening, abrasion and the like caused by mutual friction between the action parts in the carrying process can be avoided, the yield of the anti-explosion valves is improved, the action parts of the anti-explosion valves are not prone to being affected by stacking and carrying, and the service life of the anti-explosion valves is prolonged. And the explosion opening effect of the explosion-proof valve is ensured.

Description

Technical Field

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

[0002] As a device that converts chemical energy into electrical energy, batteries are widely used in daily life, industrial production and other application scenarios.

[0003] The battery includes a cover, a shell and a battery cell. The cover and the shell are fixedly connected to form an enclosed space for accommodating the battery cell. In order to improve the safety of the battery, an explosion-proof valve is provided on the cover. The explosion-proof valve is notched. When the battery cell suffers from thermal runaway and releases a large amount of gas, the explosion-proof valve will open under the impact of the gas inside the shell and release excess gas to the outside, thereby preventing the battery from exploding due to excessive internal pressure.

[0004] The unscored side of the explosion-proof valve is typically flat, while the scored side is a sunken structure to facilitate welding the valve to the housing. However, multiple explosion-proof valves are often stacked, which can cause the flat sides of adjacent valves to come into contact. During stacking or transportation, the flat sides of adjacent valves can rub against each other, causing oxidation, blackening, and scratches in the explosion-proof valve area. This not only affects the yield rate of the explosion-proof valve, but can also affect the explosion-proof valve's effectiveness. Utility Model Content

[0005] The purpose of the utility model is to provide an explosion-proof valve, a battery cover and a battery, so as to solve the problem that when the explosion-proof valves are stacked, the explosion-proof areas of adjacent explosion-proof valves are prone to friction.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, an explosion-proof valve comprises: an action portion, wherein one side of the action portion is provided with a notch, the action portion is provided with an explosion area, and the outer edge of the explosion area coincides with the notch in the thickness direction of the action portion; a partition portion, the partition portion is connected to the action portion, and the partition portion is provided on at least one side of the action portion.

[0008] Preferably, two partitions are provided, and the two partitions are respectively provided on both sides of the bursting area and are integrally formed with the action part.

[0009] Preferably, the partition is arranged around the outer edge of the bursting area, and the partition is spaced apart from the notch.

[0010] Preferably, the width of the partition is greater than 1.2 mm; and / or the height of the partition is greater than 0.1 mm.

[0011] Preferably, the explosion-proof valve further includes an identification portion, which is connected to one side of the partition and is used to distinguish between two side surfaces of the partition.

[0012] Preferably, the identification portion is arranged on the partition portion which is arranged away from the notch.

[0013] Preferably, the notch includes a first portion and a second portion, the thickness of the action portion corresponding to the position of the first portion is greater than the thickness of the action portion corresponding to the position of the second portion, and the identification portion is arranged on a side of the bursting area facing the first portion.

[0014] Preferably, the identification portion is a sunken structure, or the identification portion is a raised structure.

[0015] In a second aspect, a battery cover comprises a cover body and the explosion-proof valve as described above, wherein the explosion-proof valve is fixedly disposed on the cover body.

[0016] In a third aspect, a battery comprises a shell, a battery cell and the battery cover as described above, wherein the cover body is fixedly connected to the shell, the battery cell is arranged in a space enclosed by the cover body and the shell, and the notch on the active portion is arranged toward the battery cell.

[0017] Beneficial effects of the utility model:

[0018] An explosion-proof valve includes an action part and a separator, one side of the action part is provided with a notch, the action part is provided with an explosion area, the outer edge of the explosion area coincides with the notch in the thickness direction of the action part; the separator is connected to the action part, and the separator is provided on at least one side of the action part.

[0019] In this way, when multiple explosion-proof valves need to be stacked, the partitions of adjacent explosion-proof valves abut against each other, which can enable the positions of the explosion areas of the active parts to be set at intervals, avoiding oxidation, blackening and grinding due to mutual friction between the active parts during transportation, improving the yield of the explosion-proof valves, allowing the explosion-proof valves to be stably connected to the cover body, and ensuring the explosion effect of the explosion-proof valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the explosion-proof valve in one embodiment of the utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the explosion-proof valve in one embodiment of the utility model. Figure 2 ;

[0022] Figure 3This is a cross-sectional view of an explosion-proof valve in one embodiment of the present utility model;

[0023] Figure 4 It is a partial cross-sectional view of an explosion-proof valve in one embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Action part; 11. Notch; 111. First part; 112. Second part; 2. Separation part; 3. Identification part. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] First, see Figure 1-Figure 4The utility model provides an explosion-proof valve, including an action part 1 and a partition part 2. A notch 11 is opened on one side of the action part 1, and the action part 1 is provided with an explosion area (not shown in the figure). The outer edge of the explosion area coincides with the notch 11 in the thickness direction of the action part 1, that is, the notch 11 encloses the explosion area; the partition part 2 is connected to the action part 1, and the partition part 2 is provided on at least one side of the action part 1.

[0031] In this embodiment, the action portion 1 is a runway-shaped plate structure, and the partition portion 2 is arranged to protrude from the action portion 1 so that when the explosion-proof valves are stacked, the explosion areas of adjacent explosion-proof valves can be spaced apart.

[0032] In this way, when the explosion-proof valves need to be stacked, the positional spacing of the explosion areas of adjacent explosion-proof valves can avoid mutual friction between the active parts 1 during transportation and cause oxidation, blackening, and grinding, thereby improving the yield of the explosion-proof valves and preventing the active parts 1 from being affected by stacking and transportation, thereby ensuring the explosion effect of the explosion-proof valves.

[0033] It is understandable that the shape of the explosion-proof valve is not limited to the runway shape, and can also be a circle or other shapes. The specific shape of the explosion-proof valve can be flexibly adjusted according to actual design needs, and no further examples are given here.

[0034] See Figure 1 and Figure 2 In some embodiments, two partitions 2 are provided, and the two partitions 2 are respectively provided on both sides of the bursting area and are integrally formed with the action part 1. In this embodiment, the two partitions 2 have the same shape and are respectively provided on both sides of the bursting area along the thickness direction of the action part 1.

[0035] In this way, when the explosion-proof valve is stacked with adjacent explosion-proof valves in the forward or reverse direction, the adjacent action parts 1 can be set at intervals under the obstruction of the partition part 2, thereby avoiding friction at the position of the action part 1 corresponding to the explosion area and affecting the quality of the explosion-proof valve, improving the yield of the explosion-proof valve, and making it easier for staff to carry and store the stacked explosion-proof valves, thereby improving stacking efficiency.

[0036] It is understandable that the shapes of the two partitions 2 may also be different, as long as the active part 1 is located between the two partitions 2 and protected by the two partitions 2 . This embodiment does not limit this.

[0037] See Figure 1 In some embodiments, the partitions 2 are disposed around the outer edge of the bursting region. Furthermore, the shape of the partitions 2 is similar to that of the outer edge of the bursting region, and the partitions 2 are spaced apart from the notches 11. In this embodiment, the two partitions 2 are racetrack-shaped annular structures, and the centers of the partitions 2 coincide with the center of the active portion 1, i.e., the partitions 2 and the active portion 1 are coaxially disposed.

[0038] In this way, the partition 2 is arranged around the outer edge of the explosion area, so that when multiple explosion-proof valves are stacked, the position where the action part 1 is set in the explosion area can be subject to stable support force from the partition 2, avoiding deformation due to uneven force, and avoiding friction between the explosion areas of adjacent explosion-proof valves, thereby improving the stability of the explosion-proof valves when they are stacked and the yield of the explosion-proof valves.

[0039] It can be understood that the partition 2 can also be a strip structure arranged at intervals around the explosion area, or a convex structure. The specific shape of the partition 2 can be flexibly adjusted to ensure that the active parts 1 are spaced apart and do not contact each other when the explosion-proof valves are stacked. No further details will be given here.

[0040] See Figure 4 In some embodiments, the width L of the separator 2 is greater than 1.2 mm, and the height H of the separator 2 is greater than 0.1 mm. For example, the width L of the separator 2 can be 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or 2 mm, and the height H of the separator 2 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm.

[0041] In this way, the partition 2 has a sufficient width to ensure a stable connection with the cover body during welding, avoiding defects such as fire explosion and poor weld formation due to insufficient closing distance, and improving the connection strength and sealing between the explosion-proof valve and the cover body; the partition 2 has a sufficient height to ensure sufficient spacing between adjacent active parts 1 when the explosion-proof valves are stacked, avoiding friction at the position where the explosion area of ​​adjacent active parts 1 is set and affecting the yield of the explosion-proof valve.

[0042] It is understandable that the width and height of the partition 2 can be flexibly adjusted according to actual needs, so as to separate adjacent active parts 1 when the explosion-proof valves are stacked. No further examples will be given for this.

[0043] See Figure 2 and Figure 3 In some embodiments, the explosion-proof valve further includes an identification portion 3 , which is connected to one side of the partition 2 and is used to distinguish the two sides of the partition 2 .

[0044] In this way, the identification part 3 is provided on the partition part 2, which can facilitate the staff to distinguish the side of the partition part 2 and the action part 1 by vision and touch, so as to arrange and stack the explosion-proof valves in the same direction, improve the stacking efficiency, avoid the adjacent explosion-proof valves from contacting and rubbing with each other due to opposite directions of the action parts 1, and improve the yield of the explosion-proof valves and the blasting effect.

[0045] It can be understood that the identification part 3 can also be set on the action part 1. In this embodiment, the identification part 3 is set on the partition part 2 in order to reduce the impact of the identification part 3 on the explosion area and enable the explosion-proof valve to explode normally. The specific setting position of the identification part 3 can be flexibly adjusted according to actual design needs, and no more examples will be listed here.

[0046] See Figure 1 and Figure 2 In some embodiments, the identification portion 3 is provided on the partition portion 2 which is provided away from the notch 11 , that is, the notch 11 and the identification portion 3 are respectively provided on two sides of the explosion-proof valve which are away from each other.

[0047] In this way, it is not easy to affect the notch 11 when processing the identification part 3, and it is convenient for the staff to judge the stacking direction of the explosion-proof valve by vision and touch, thereby improving the stacking efficiency and stacking effect, avoiding the positions of the explosion areas of adjacent action parts 1 to abut and rub against each other, and improving the yield and safety of the explosion-proof valve.

[0048] It is understandable that the identification portion 3 may also be provided on the partition portion 2 disposed toward the notch 11 , which will not be elaborated herein.

[0049] See Figure 3 In some embodiments, the notch 11 includes a first portion 111 and a second portion 112. The thickness of the active portion 1 corresponding to the first portion 111 is greater than the thickness of the active portion 1 corresponding to the second portion 112. That is, the groove depth of the first portion 111 is less than the groove depth of the second portion 112. The identification portion 3 is disposed on the side of the bursting region facing the first portion 111. The first portion 111 and the second portion 112 together form the outer edge of the bursting region, and the identification portion 3 is disposed on the side of the first portion 111 facing away from the second portion 112.

[0050] In this way, since the thickness of the active part 1 corresponding to the position of the first part 111 is larger and the structural strength is also greater than that of the active part 1 corresponding to the position of the second part 112, when the battery cell loses control and releases a large amount of gas to impact the explosion-proof valve, the active part 1 corresponding to the position of the second part 112 opens first to control the explosion direction of the explosion-proof valve. The identification part 3 is set on the side of the explosion area facing the first part 111, which can not only distinguish the two side surfaces of the active part 1 and the partition part 2, but also distinguish the explosion direction of the explosion-proof valve, which is convenient for the staff to stack the explosion-proof valves in the same direction and improve the stacking efficiency.

[0051] It is understandable that the setting position of the identification part 3 can be flexibly adjusted, and can also be set on the side of the explosion area away from the first part 111, which will not be listed in detail here.

[0052] See Figure 2 and Figure 3In some embodiments, the identification portion 3 is a sunken platform structure. In this embodiment, the identification portion 3 is a circular hole sunken platform structure.

[0053] In this way, it is convenient to process the identification part 3 on the partition part 2, so that the staff can easily distinguish the side of the explosion-proof valve with the notch 11 and the side without the notch 11, and stack multiple explosion-proof valves in the same direction to avoid friction between the parts of the adjacent action parts 1 where the explosion area is set and affect the yield of the explosion-proof valve, making the connection between the explosion-proof valve and the cover body more stable.

[0054] It can be understood that the identification part 3 can also be a conical hole sink structure, a square hole sink structure, etc. In some embodiments, the identification part 3 can also be a raised structure. The shape of the raised structure can be circular, square, triangular or characters, as long as it can play the role of visual and tactile recognition. This embodiment does not limit this.

[0055] Second, see Figure 1 The present invention provides a battery cover, comprising a cover body (not shown) and an explosion-proof valve, which is fixedly mounted on the cover body. In this embodiment, the partition 2 is fixedly connected to the cover body by welding.

[0056] In this way, the identification part 3 makes it easy for the staff to install the explosion-proof valve on the cover body in the correct direction, and the partition part 2 can be stably connected to the cover body without affecting the normal use of the action part 1.

[0057] It is understandable that the location of the explosion-proof valve and the connection method with the cover body can be flexibly adjusted, and this embodiment does not limit this.

[0058] Thirdly, see Figure 1 The utility model provides a battery, including a shell (not shown in the figure), a battery cell (not shown in the figure) and a battery cover. The cover body and the shell are fixedly connected by welding. The battery cell is arranged in a space enclosed by the cover body and the shell, and the notch 11 on the active part 1 is arranged toward the battery cell.

[0059] In this way, when the battery cell experiences thermal runaway, the large amount of gas generated can impact the area where the notch 11 is set on the action part 1, and cause the explosion area to open under the action of the gas impact, thereby discharging the gas to the outside, avoiding gas accumulation inside the shell, and improving the safety performance of the battery.

[0060] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An explosion-proof valve, characterized in that: include: An action portion (1), wherein one side of the action portion (1) is provided with a notch (11), the action portion (1) is provided with an explosion area, and the outer edge of the explosion area coincides with the notch (11) in the thickness direction of the action portion (1); A partition (2), the partition (2) is connected to the action portion (1), and the partition (2) is arranged on at least one side of the action portion (1).

2. The explosion-proof valve according to claim 1, characterized in that: Two partitions (2) are provided, and the two partitions (2) are respectively provided on both sides of the bursting area and are integrally formed with the action part (1).

3. The explosion-proof valve according to claim 1, characterized in that: The partition (2) is arranged around the outer edge of the bursting area, and the partition (2) is spaced apart from the notch (11).

4. The explosion-proof valve according to claim 1, characterized in that: The width of the partition (2) is greater than 1.2 mm; and / or the height of the partition (2) is greater than 0.1 mm.

5. The explosion-proof valve according to any one of claims 1 to 4, characterized in that: The explosion-proof valve further comprises an identification portion (3), wherein the identification portion (3) is connected to one side of the partition portion (2) and is used to distinguish between the two side surfaces of the partition portion (2).

6. The explosion-proof valve according to claim 5, characterized in that: The identification portion (3) is arranged on the partition portion (2) which is arranged away from the notch (11).

7. The explosion-proof valve according to claim 5, characterized in that: The notch (11) comprises a first portion (111) and a second portion (112); the thickness of the action portion (1) corresponding to the position of the first portion (111) is greater than the thickness of the action portion (1) corresponding to the position of the second portion (112); and the identification portion (3) is arranged on a side of the bursting area facing the first portion (111).

8. The explosion-proof valve according to claim 5, characterized in that: The identification portion (3) is a sunken structure, or the identification portion (3) is a raised structure.

9. A battery cover, characterized in that: It comprises a cover plate body and an explosion-proof valve according to any one of claims 1 to 8, wherein the explosion-proof valve is fixedly arranged on the cover plate body.

10. A battery, characterized in that: The invention comprises a shell, a battery cell and a battery cover as claimed in claim 9, wherein the cover body is fixedly connected to the shell, the battery cell is arranged in a space enclosed by the cover body and the shell, and the notch (11) on the action part (1) is arranged toward the battery cell.

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