Explosion-proof cover plate and battery

Abstract

This utility model relates to the field of energy storage equipment technology, and more particularly to an explosion-proof cover and battery. The explosion-proof cover includes a top cover plate, an explosion-proof valve, and an explosion-proof patch. The top cover plate has an explosion-proof hole and a first positioning part, with the explosion-proof valve positioned at the explosion-proof hole. The explosion-proof patch has a second positioning part; when the second positioning part cooperates with the first positioning part, the explosion-proof patch is located within an assembly area capable of sealing the explosion-proof hole. The first positioning part is a first positioning protrusion, and the second positioning part is a positioning through hole; alternatively, the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion. The battery includes a housing and the aforementioned explosion-proof cover plate, with the explosion-proof cover plate covering the opening of the housing to form the battery casing. This explosion-proof cover and battery can prevent misalignment of the explosion-proof patch, ensuring product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to an explosion-proof cover and battery. Background Technology

[0002] An explosion-proof valve is installed on the top cover of the battery to reduce the damage caused by thermal runaway. An explosion-proof patch is usually installed on the outside of the valve to prevent external contaminants from contacting it and causing changes in burst pressure. The explosion-proof patch is usually directly placed over the explosion-proof hole, but due to the lack of a positioning structure, it is easy to misalign, resulting in a reduced adhesive area and easy detachment. If misaligned, rework is required, affecting production efficiency. Utility Model Content

[0003] One objective of this utility model is to provide an explosion-proof cover that can prevent the explosion-proof patch from misaligning, thereby ensuring product quality and production efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A blast-proof cover is provided, comprising:

[0006] The top cover plate has explosion-proof holes and a first positioning part.

[0007] An explosion-proof valve is disposed at the explosion-proof port;

[0008] An explosion-proof patch is provided with a second positioning part. When the second positioning part cooperates with the first positioning part, the explosion-proof patch is located in an assembly area that can block the explosion-proof hole.

[0009] The first positioning part is a first positioning protrusion, and the second positioning part is a positioning through hole; or, the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion.

[0010] Optionally, multiple first positioning units and multiple second positioning units are provided, with each of the multiple first positioning units corresponding to one of the multiple second positioning units.

[0011] Optionally, a plurality of the first positioning portions are evenly spaced around the explosion-proof hole.

[0012] Optionally, the height of the first positioning protrusion ranges from 0.2mm to 1mm.

[0013] Optionally, the cross-section of the first positioning protrusion is circular, the positioning through hole is circular, and the difference between the inner diameter of the positioning through hole and the diameter of the cross-section of the first positioning protrusion ranges from 0.1 mm to 0.4 mm.

[0014] Optionally, the first positioning protrusion extends in a direction perpendicular to the top cover plate.

[0015] Optionally, the explosion-proof patch includes a body layer and an adhesive layer, the adhesive layer being sandwiched between the body layer and the top cover sheet, the adhesive layer including multiple adhesive segments, the multiple adhesive segments being arranged sequentially at intervals to form an annular adhesive area, and the positioning through hole being located at the interval between two adjacent adhesive segments.

[0016] Optionally, the explosion-proof hole is racetrack-shaped, and there are two first positioning protrusions. The two first positioning protrusions are arranged opposite each other along the length direction of the explosion-proof hole. There are two positioning through holes, and the two positioning through holes are respectively arranged corresponding to the two first positioning protrusions.

[0017] Optionally, the positioning groove is an annular groove, the second positioning protrusion is an annular protrusion, and the annular groove and the annular protrusion are arranged around the explosion-proof hole.

[0018] Another objective of this invention is to provide a battery that can prevent the explosion-proof patch from misaligning, thereby ensuring product quality and production efficiency.

[0019] To achieve this objective, the present invention adopts the following technical solution:

[0020] A battery is provided, including a housing and the aforementioned explosion-proof cover, the explosion-proof cover being disposed over an opening in the housing to form the outer casing of the battery.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides an explosion-proof cover plate, including a top cover, an explosion-proof valve, and an explosion-proof patch. The top cover has an explosion-proof hole and a first positioning part, with the explosion-proof valve positioned at the explosion-proof hole. The explosion-proof patch has a second positioning part; when the second positioning part cooperates with the first positioning part, the explosion-proof patch is located within an assembly area capable of sealing the explosion-proof hole. The first positioning part is a first positioning protrusion, and the second positioning part is a positioning through hole; alternatively, the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion. Through the positioning cooperation of the first and second positioning parts, the explosion-proof patch is ensured to be located within the assembly area. By reasonably pre-setting the range of the assembly area, a sufficiently large bonding area between the explosion-proof patch and the top cover is ensured, guaranteeing a firm bond, avoiding rework, and ensuring product quality and production efficiency.

[0023] This utility model also provides a battery, including a casing and the aforementioned explosion-proof cover, the explosion-proof cover being disposed over the opening of the casing to form the battery casing. This battery can prevent misalignment of the explosion-proof patch, ensuring product quality and production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the explosion-proof cover plate provided in this embodiment of the utility model;

[0025] Figure 2 This is a partial exploded view of the explosion-proof cover plate provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the explosion-proof patch provided in this embodiment of the utility model.

[0027] In the picture:

[0028] 1. Top cover plate; 11. Explosion-proof hole; 12. First positioning protrusion;

[0029] 2. Explosion-proof patch; 21. Positioning through hole; 22. Body layer; 23. Adhesive layer; 231. Spacing position;

[0030] 3. Terminal assembly; 4. Lower plastic. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] An explosion-proof valve is installed on the top cover of the battery to reduce the damage caused by thermal runaway. An explosion-proof patch is usually installed on the outside of the valve to prevent external contaminants from contacting it and causing changes in burst pressure. The explosion-proof patch is usually directly placed over the explosion-proof hole, but due to the lack of a positioning structure, it is easy to misalign, resulting in a reduced adhesive area and easy detachment. If misaligned, rework is required, affecting production efficiency.

[0035] Therefore, this embodiment provides an explosion-proof cover to solve the above problems. The explosion-proof cover can prevent the explosion-proof patch 2 from being misaligned, thus ensuring product quality and production efficiency.

[0036] like Figures 1-3 As shown, the explosion-proof cover plate of this embodiment includes a top cover plate 1, an explosion-proof valve, and an explosion-proof patch 2. The top cover plate 1 has an explosion-proof hole 11 and a first positioning part. The explosion-proof valve is located at the explosion-proof hole 11. The explosion-proof patch 2 has a second positioning part. When the second positioning part cooperates with the first positioning part, the explosion-proof patch 2 is located within the assembly area capable of sealing the explosion-proof hole 11. The first positioning part is a first positioning protrusion 12, and the second positioning part is a positioning through hole 21; alternatively, the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion.

[0037] By coordinating the positioning of the first and second positioning parts, the explosion-proof patch 2 can be ensured to be located within the assembly area. By reasonably pre-setting the range of the assembly area, the bonding area between the explosion-proof patch 2 and the top cover 1 can be ensured to be large enough, thus ensuring that the explosion-proof patch 2 is firmly bonded, avoiding rework, and ensuring product quality and production efficiency.

[0038] Optionally, multiple first positioning parts and multiple second positioning parts are provided, with each of the multiple first positioning parts corresponding to a multiple of the multiple second positioning parts. In this embodiment, all the first positioning parts are first positioning protrusions 12, and all the second positioning parts are positioning through holes 21. In some other embodiments, all the first positioning parts are positioning grooves, and all the second positioning parts are second positioning protrusions. In other embodiments, some of the first positioning parts are first positioning protrusions 12, and correspondingly, some of the second positioning parts are positioning through holes 21, while the remaining first positioning parts are positioning grooves, and the remaining second positioning parts are second positioning protrusions. Increasing the number of first positioning parts and second positioning parts can further improve the positioning accuracy and maximize the bonding area between the explosion-proof patch 2 and the top cover 1.

[0039] Optionally, a plurality of first positioning portions are evenly spaced around the explosion-proof hole 11. Optionally, in this embodiment, the explosion-proof hole 11 is racetrack-shaped, two first positioning protrusions 12 are provided, the two first positioning protrusions 12 are arranged opposite each other along the length direction of the explosion-proof hole 11, and two positioning through holes 21 are provided, the two positioning through holes 21 are respectively arranged corresponding to the two first positioning protrusions 12. That is, as follows Figure 1 As shown, a positioning through hole 21 is provided at one end of the racetrack-shaped explosion-proof hole 11 along its length, and another positioning through hole 21 is provided at the other end.

[0040] Optionally, the height of the first positioning protrusion 12 can be in the range of 0.2mm-1mm. If the height of the first positioning protrusion 12 is too small, the positioning may fail if there is a processing error. If the first positioning protrusion 12 is too high, it will exceed the upper surface of the explosion-proof patch 2, causing the outer end face of the explosion-proof cover to protrude significantly, which may easily scratch external components and is detrimental to aesthetics and safety.

[0041] Optionally, in this embodiment, the cross-section of the first positioning protrusion 12 is circular, and the positioning through hole 21 is circular. The difference between the inner diameter of the positioning through hole 21 and the diameter of the cross-section of the first positioning protrusion 12 ranges from 0.1mm to 0.4mm. That is, there is a certain gap between the inner wall of the positioning through hole 21 and the side wall of the first positioning protrusion 12. This gap ensures that the first positioning protrusion 12 can be quickly inserted into the positioning through hole 21. If this gap is too large, the assembly area of ​​the explosion-proof patch 2 will be too large, resulting in poor positioning. If this gap is too small, the time required for the first positioning protrusion 12 to be inserted into the positioning through hole 21 will be longer, affecting assembly efficiency.

[0042] In other embodiments, the cross-section of the first positioning protrusion 12 may also be elliptical, polygonal, etc., and correspondingly, the shape of the positioning through hole 21 is consistent with the shape of the cross-section of the first positioning protrusion 12.

[0043] Optionally, the first positioning protrusion 12 extends in a direction perpendicular to the top cover plate 1 to ensure that the explosion-proof patch 2 is close to the top cover plate 1 in a direction perpendicular to the top cover plate 1 and is bonded and fixed thereto.

[0044] Optionally, such as Figure 3 As shown, the explosion-proof patch 2 includes a body layer 22 and an adhesive layer 23. The adhesive layer 23 is sandwiched between the body layer 22 and the top cover plate 1. The adhesive layer 23 includes multiple adhesive segments, which are arranged sequentially at intervals to form an annular adhesive area. The annular adhesive area is located at the edge of the body layer 22, and the positioning through hole 21 is located at the interval 231 between two adjacent adhesive segments. When the internal air pressure of the battery changes, the explosion-proof valve will deform, and the air pressure between the explosion-proof valve and the explosion-proof patch 2 will change accordingly. The absence of adhesive at the interval 231 can balance the internal and external air pressure of the explosion-proof patch 2.

[0045] Optionally, the number of positioning through holes 21 is the same as the number of adhesive segments, and each positioning through hole 21 is located at a spaced position 231. In this embodiment, there are two adhesive segments with two spaced positions 231, and the two positioning through holes 21 are located at the two spaced positions 231 respectively.

[0046] In other embodiments, the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion. Optionally, the positioning groove is an annular groove, and the second positioning protrusion is an annular protrusion, with the annular groove and the annular protrusion surrounding the explosion-proof hole 11. The positioning of the explosion-proof patch 2 on the top cover plate 1 is achieved through the cooperation of the annular protrusion and the annular groove. However, it should be noted that the height of the annular protrusion must be less than or equal to the depth of the annular groove to prevent the explosion-proof patch 2 from failing to adhere to the top cover plate 1 near the annular protrusion. Alternatively, in other embodiments, the positioning groove can be a columnar groove, the second positioning protrusion can be a columnar protrusion, and multiple columnar protrusions correspond one-to-one with multiple columnar grooves, with evenly spaced intervals between the multiple sets.

[0047] Optionally, the explosion-proof cover also includes a terminal assembly 3 and a lower plastic 4. The terminal assembly 3 is disposed at the terminal through hole of the top cover 1, and the lower plastic 4 is attached to the end face of the top cover 1 facing the inside of the battery.

[0048] This embodiment also provides a battery, including a casing and the aforementioned explosion-proof cover. The explosion-proof cover is disposed over the opening of the casing to form the battery casing. This battery can prevent misalignment of the explosion-proof patch 2, ensuring product quality and production efficiency.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An explosion-proof cover plate, characterized by include: Top cover plate (1), the top cover plate (1) is provided with an explosion-proof hole (11), and the top cover plate (1) is also provided with a first positioning part; An explosion-proof valve is provided at the explosion-proof hole (11); An explosion-proof patch (2) is provided with a second positioning part. When the second positioning part cooperates with the first positioning part, the explosion-proof patch (2) is located in the assembly area that can block the explosion-proof hole (11). The first positioning part is a first positioning protrusion (12), and the second positioning part is a positioning through hole (21), or the first positioning part is a positioning groove, and the second positioning part is a second positioning protrusion.

2. The explosion-proof cover plate of claim 1, wherein, Multiple first positioning units and multiple second positioning units are provided, with each of the multiple first positioning units corresponding to one of the multiple second positioning units.

3. The explosion-proof cover plate of claim 2, wherein, Multiple first positioning parts are evenly spaced around the explosion-proof hole (11).

4. The explosion-proof cover plate of claim 1, wherein, The height of the first positioning protrusion (12) ranges from 0.2mm to 1mm.

5. The explosion-proof cover plate according to any one of claims 1-4, characterized in that The first positioning protrusion (12) has a circular cross-section, the positioning through hole (21) is circular, and the difference between the inner diameter of the positioning through hole (21) and the diameter of the cross-section of the first positioning protrusion (12) is in the range of 0.1mm-0.4mm.

6. The explosion-proof cover plate according to any one of claims 1-4, characterized in that The first positioning protrusion (12) extends in a direction perpendicular to the top cover plate (1).

7. The explosion-proof cover plate according to any one of claims 1-4, characterized in that The explosion-proof patch (2) includes a body layer (22) and an adhesive layer (23). The adhesive layer (23) is sandwiched between the body layer (22) and the top cover (1). The adhesive layer (23) includes multiple adhesive segments, which are arranged sequentially at intervals to form an annular adhesive area. The positioning through hole (21) is located at the interval (231) between two adjacent adhesive segments.

8. The explosion-proof cover plate according to any one of claims 1-4, characterized in that The explosion-proof hole (11) is racetrack shaped. There are two first positioning protrusions (12). The two first positioning protrusions (12) are arranged opposite each other along the length direction of the explosion-proof hole (11). There are two positioning through holes (21). The two positioning through holes (21) are respectively arranged corresponding to the two first positioning protrusions (12).

9. The explosion-proof cover plate according to any one of claims 1-4, characterized in that The positioning groove is an annular groove, and the second positioning protrusion is an annular protrusion. The annular groove and the annular protrusion are arranged around the explosion-proof hole (11).

10. A battery characterized by The battery includes a housing and an explosion-proof cover as described in any one of claims 1-9, the explosion-proof cover being disposed over an opening in the housing to form the outer casing of the battery.

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