Battery top cover assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover assembly and a single battery, the battery top cover assembly comprises a top cover piece, a pole assembly and an anti-explosion structure, the pole assembly and the anti-explosion structure are both arranged on the top cover piece, one side of the top cover piece is provided with an anti-explosion groove, and the top cover piece is provided with an anti-explosion groove. At least part of the bottom of the anti-explosion groove can be communicated with the other side of the top cover piece, so that the anti-explosion structure is communicated with the interior of the single battery; at least part of the anti-explosion structure is arranged in the anti-explosion groove in a sealed mode, the side, facing the top cover piece, of the groove wall of the anti-explosion groove is provided with a buckling piece in an extending mode, and the buckling piece is connected with the anti-explosion structure in a buckled mode so that at least part of the anti-explosion structure can be limited in the anti-explosion groove. According to the battery top cover assembly, the mode of welding and fixing the explosion-proof structure can be cancelled, the thermal deformation of the explosion-proof structure is avoided, meanwhile, a better sealing effect can be obtained, and the yield of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly and a single battery. Background Art

[0002] With the continuous development of the new energy industry, the production and consumption of batteries are gradually increasing, and the requirements for batteries are also gradually increasing. As one of the main components of the battery, the battery top cover assembly has increasingly higher requirements for its explosion-proof structure, liquid injection structure, and terminal structure.

[0003] The existing battery top cover assembly includes a top cover sheet, a pole assembly and an explosion-proof structure. The explosion-proof structure is often a sheet material, which is laser welded to the top cover sheet. Welding and installing the explosion-proof sheet will cause the explosion-proof sheet itself to deform due to heat, which may easily cause the exhaust pressure of the single cell to be unstable. At the same time, there is also the risk of poor welding, which affects the sealing of the single cell.

[0004] Therefore, there is an urgent need for a battery top cover assembly and a single battery to solve the above technical problems. Utility Model Content

[0005] One purpose of the present invention is to provide a battery top cover assembly that can eliminate the method of fixing the explosion-proof structure by welding, thereby avoiding deformation of the explosion-proof structure due to heat, and at the same time can achieve a better sealing effect and improve the product yield.

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

[0007] The battery top cover assembly includes a top cover, a pole assembly and an explosion-proof structure. The pole assembly and the explosion-proof structure are both arranged on the top cover, wherein:

[0008] An explosion-proof groove is provided on one side of the top cover, and at least a portion of the bottom of the explosion-proof groove is in communication with the other side of the top cover;

[0009] At least part of the explosion-proof structure is sealed in the explosion-proof groove. A buckle is provided on the groove wall of the explosion-proof groove extending toward one side of the top cover. The buckle is buckled and connected to the explosion-proof structure to confine at least part of the explosion-proof structure in the explosion-proof groove.

[0010] Optionally, a groove wall of the explosion-proof groove is provided with an annular boss extending toward one side of the top cover, and the annular boss is configured to be able to be bent and fastened to form the fastening member after the explosion-proof structure is sealed and placed in the explosion-proof groove.

[0011] Optionally, the explosion-proof structure and the bottom of the explosion-proof groove and / or the explosion-proof structure and the fastener are sealed.

[0012] Optionally, a first sealing member is sandwiched between the explosion-proof structure and the bottom of the explosion-proof groove.

[0013] Optionally, a first annular sealing groove is provided at the bottom of the explosion-proof groove, and the first sealing member is provided in the first annular sealing groove.

[0014] Optionally, a second sealing member is sandwiched between the explosion-proof structure and the fastening member.

[0015] Optionally, a second annular sealing groove is provided on a side of the explosion-proof structure facing the fastener, and the second sealing member is provided in the second annular sealing groove.

[0016] Optionally, the explosion-proof structure includes an explosion-proof component, which is sealed in the explosion-proof groove and is buckled with the buckle component.

[0017] Optionally, the explosion-proof structure further includes an explosion-proof membrane, and the explosion-proof membrane cover is arranged on the fastener.

[0018] Another object of the present invention is to provide a single battery that can eliminate the method of fixing the explosion-proof structure by welding, thereby avoiding deformation of the explosion-proof structure due to heat, and at the same time can achieve a better sealing effect and improve the product yield.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] A single battery comprises a shell, a battery cell and a battery top cover assembly as described in any of the above schemes, wherein the battery cell is arranged in the shell, and the battery top cover assembly is sealed at the opening of the shell.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery top cover assembly and a single battery, wherein an explosion-proof structure is sealed and arranged in an explosion-proof groove, and a buckle is used to buckle the explosion-proof structure to achieve a sealed connection between the explosion-proof structure and the top cover, thereby eliminating the method of fixing the explosion-proof structure by welding, avoiding the risks of thermal deformation of the explosion-proof structure and poor welding, so that the explosion-proof structure of the battery top cover assembly not only has an excellent sealing effect, but also improves the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric view of a battery top cover assembly provided in a specific embodiment of the present utility model;

[0024] Figure 2 It is a cross-sectional view of a battery top cover assembly provided by a specific embodiment of the present utility model;

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0027] In the picture:

[0028] 10. Top cover; 11. Explosion-proof slot; 12. Fastener;

[0029] 20. Pole assembly;

[0030] 30. Explosion-proof structure; 31. Explosion-proof parts; 32. Explosion-proof membrane; 33. Notch;

[0031] 40. First sealing member; 50. Second sealing member. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] This embodiment provides a battery top cover assembly, which is applied to a single battery. The battery top cover assembly eliminates the method of welding and fixing the explosion-proof structure 30, thereby preventing the explosion-proof structure 30 from being deformed by heat, and at the same time can achieve a better sealing effect and improve the product yield.

[0037] Please refer to Figures 1 to 3 Specifically, the battery top cover assembly includes a top cover 10, a pole assembly 20 and an explosion-proof structure 30, wherein the pole assembly 20 and the explosion-proof structure 30 are both arranged on the top cover 10, wherein an explosion-proof groove 11 is opened on one side of the top cover 10, and at least a portion of the bottom of the explosion-proof groove 11 can be communicated with the other side of the top cover 10 to realize the communication between the explosion-proof structure 30 and the interior of the battery; at least a portion of the explosion-proof structure 30 is sealed in the explosion-proof groove 11, and the groove wall of the explosion-proof groove 11 extends toward one side of the top cover 10 and is provided with a fastener 12. Specifically, the groove wall of the explosion-proof groove 11 extends toward the side of the groove opening with a fastener 12; the fastener 12 and the explosion-proof structure 30 are buckled and connected to confine at least a portion of the explosion-proof structure 30 within the explosion-proof groove 11.

[0038] The battery top cover assembly of this embodiment realizes a sealed connection between the explosion-proof structure 30 and the top cover member 10 by sealingly setting the explosion-proof structure 30 in the explosion-proof groove 11 and adopting the fastener 12 to fasten the explosion-proof structure 30, eliminating the method of fixing the explosion-proof structure 30 by welding, avoiding the risks of thermal deformation and poor welding of the explosion-proof structure 30, so that the explosion-proof structure 30 of the battery top cover assembly not only has a good sealing effect, but also improves the product yield.

[0039] Optionally, an annular boss is provided on the groove wall of the explosion-proof groove 11 extending toward one side of the top cover 10, and the annular boss is configured to be able to be bent and snapped to form a snap-fit component 12 after the explosion-proof structure 30 is sealed and placed in the explosion-proof groove 11, that is, the snap-fit component 12 is an annular boss when the explosion-proof structure 30 is not installed, so as to facilitate the installation of the explosion-proof structure 30; after the explosion-proof structure 30 is sealed and installed, the annular boss is bent and snapped to the explosion-proof structure 30, so as to fix the explosion-proof structure 30.

[0040] Please refer to Figure 3 and Figure 4Optionally, a sealing connection is formed between the explosion-proof structure 30 and the bottom of the explosion-proof groove 11 and / or between the explosion-proof structure 30 and the fastener 12. That is, the explosion-proof structure 30 can be sealed at the bottom of the explosion-proof groove 11 or at the fastener 12, both of which can achieve a sealing effect of the explosion-proof structure 30. At the same time, the explosion-proof structure 30 can also be sealed at both locations, and the double sealing further improves the sealing effect of the explosion-proof structure 30.

[0041] In some embodiments, a first seal 40 is sandwiched between the explosion-proof structure 30 and the bottom of the explosion-proof groove 11. When the fastener 12 fastens the explosion-proof structure 30, it can squeeze the explosion-proof structure 30 and then squeeze the first seal 40, so that the first seal 40 is in a compressed state, thereby achieving a better sealing effect between the explosion-proof structure 30 and the explosion-proof groove 11.

[0042] Specifically, a first annular sealing groove is provided at the bottom of the explosion-proof groove 11, and a first sealing member 40 is provided in the first annular sealing groove. The first annular sealing groove can position the first sealing member 40 so that the first sealing member 40 will not be offset, thereby ensuring the sealing position between the explosion-proof structure 30 and the bottom of the explosion-proof groove 11 to ensure the sealing between the two.

[0043] More specifically, the depth of the first annular sealing groove is smaller than the height of the first sealing member 40 after compression, so as to ensure the sealing effect of the first sealing member 40 on the bottom of the explosion-proof groove 11 and the explosion-proof structure 30 .

[0044] In some embodiments, a second sealing member 50 is sandwiched between the explosion-proof structure 30 and the fastener 12. When the fastener 12 is fastened to the explosion-proof structure 30, the second sealing member 50 can be squeezed so that the second sealing member 50 is in a compressed state, thereby achieving a better sealing effect between the explosion-proof structure 30 and the fastener 12.

[0045] Specifically, a second annular sealing groove is provided on the side of the explosion-proof structure 30 facing the fastener 12, and a second sealing member 50 is provided in the second annular sealing groove. The second annular sealing groove can position the second sealing member 50 so that the second sealing member 50 will not be offset, thereby ensuring the sealing position between the explosion-proof structure 30 and the fastener 12 to ensure the sealing between the two.

[0046] More specifically, the depth of the second annular sealing groove is smaller than the height of the second sealing member 50 after compression, so as to ensure the sealing effect of the second sealing member 50 on the fastening member 12 and the explosion-proof structure 30 .

[0047] Please refer to Figure 3In some embodiments, the explosion-proof structure 30 includes an explosion-proof component 31, which is sealed in the explosion-proof groove 11 and is connected to the fastener 12. That is, the explosion-proof component 31 is used to seal and block the explosion-proof groove 11 to avoid communication between the inside and outside of the battery.

[0048] In some embodiments, the explosion-proof structure 30 also includes an explosion-proof membrane 32, which is covered on the fastener 12. The explosion-proof membrane 32 blocks the top of the explosion-proof part 31, forming a double-layer explosion-proof sealing structure, which not only protects the explosion-proof part 31 and prevents the explosion-proof part 31 from being deformed by collision, but also isolates the explosion-proof part 31 from the outside, ensuring the explosion-proof and pressure relief effect of the explosion-proof part 31.

[0049] Specifically, the explosion-proof member 31 and the explosion-proof membrane 32 are both provided with notches 33, so that the explosion-proof member 31 and the explosion-proof membrane 32 have weak points, so that when the internal gas pressure of the battery is too high, the explosion-proof member 31 and the explosion-proof membrane 32 rupture and release the pressure.

[0050] Optionally, the battery top cover assembly further includes a liquid injection structure, which is provided on the top cover member 10 to enable liquid injection into the single battery.

[0051] It is understandable that the liquid injection structure and the explosion-proof structure 30 of the battery top cover assembly can be integrated into one body or provided separately, which is not specifically limited here.

[0052] This embodiment also provides a single battery cell, comprising a housing, a battery cell, and a battery cover assembly as described in any of the above-described embodiments. The battery cell is disposed within the housing, and the battery cover assembly is sealed within the opening of the housing. The explosion-proof structure 30 of the single battery cell does not require welding, thereby preventing thermal deformation of the explosion-proof structure 30, improving the reliability and yield rate of the single battery cell, and also ensuring the explosion-proof and pressure-relieving effectiveness of the single battery cell.

[0053] 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. Battery top cover assembly, characterized in that, It comprises a top cover (10), a pole assembly (20) and an explosion-proof structure (30), wherein the pole assembly (20) and the explosion-proof structure (30) are both arranged on the top cover (10), wherein: An explosion-proof groove (11) is provided on one side of the top cover (10), and at least a portion of the bottom of the explosion-proof groove (11) is able to communicate with the other side of the top cover (10); At least a portion of the explosion-proof structure (30) is sealed and arranged in the explosion-proof groove (11); a groove wall of the explosion-proof groove (11) extends toward one side of the top cover (10) and is provided with a fastening member (12); the fastening member (12) and the explosion-proof structure (30) are fastened and connected to confine at least a portion of the explosion-proof structure (30) in the explosion-proof groove (11).

2. The battery top cover assembly according to claim 1, characterized in that: An annular boss is provided on a groove wall of the explosion-proof groove (11) extending toward one side of the top cover (10), and the annular boss is configured to be able to be bent and fastened to form the fastening member (12) after the explosion-proof structure (30) is sealed and placed in the explosion-proof groove (11).

3. The battery top cover assembly according to claim 1, characterized in that: The explosion-proof structure (30) is sealedly connected to the bottom of the explosion-proof groove (11) and / or the explosion-proof structure (30) is sealed to the fastening member (12).

4. The battery top cover assembly according to claim 3, characterized in that: A first sealing member (40) is sandwiched between the explosion-proof structure (30) and the bottom of the explosion-proof groove (11).

5. The battery top cover assembly according to claim 4, characterized in that: A first annular sealing groove is provided at the bottom of the explosion-proof groove (11), and the first sealing member (40) is provided in the first annular sealing groove.

6. The battery top cover assembly according to claim 3, characterized in that: A second sealing member (50) is sandwiched between the explosion-proof structure (30) and the fastening member (12).

7. The battery top cover assembly according to claim 6, characterized in that: A second annular sealing groove is provided on a side of the explosion-proof structure (30) facing the fastening member (12), and the second sealing member (50) is provided in the second annular sealing groove.

8. The battery top cover assembly according to claim 1, characterized in that: The explosion-proof structure (30) comprises an explosion-proof component (31), wherein the explosion-proof component (31) is sealed and disposed in the explosion-proof groove (11) and is buckled and connected to the buckle component (12).

9. The battery top cover assembly according to claim 8, characterized in that: The explosion-proof structure (30) further comprises an explosion-proof membrane (32), and the explosion-proof membrane (32) is covered on the fastening member (12).

10. A single cell battery, characterized in that: The battery comprises a shell, a battery cell and a battery top cover assembly as described in any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the battery top cover assembly is sealed at the opening of the shell.

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